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Subjectmemory leak in v9fs_cache_session_get_cookie (2)
From
Hello,

syzbot found the following crash on:

HEAD commit: 3b1f00ac Merge tag 'for_linus' of git://git.kernel.org/pub..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13a95fe7600000
kernel config: https://syzkaller.appspot.com/x/.config?x=cd7f8e43c7bdf83a
dashboard link: https://syzkaller.appspot.com/bug?extid=f577fd1dae1f5b0fd8c7
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13602173600000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1700584b600000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+f577fd1dae1f5b0fd8c7@syzkaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff888122c0b620 (size 32):
comm "syz-executor002", pid 7059, jiffies 4294945363 (age 18.760s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 00 00 00 00 00 4294945363......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811819ce80 (size 32):
comm "syz-executor002", pid 7062, jiffies 4294945363 (age 18.760s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 00 00 00 00 00 4294945363......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811819c2c0 (size 32):
comm "syz-executor002", pid 7067, jiffies 4294945363 (age 18.760s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 73 74 65 6d 5f 4294945363.stem_
72 3a 6b 65 72 6e 65 6c 5f 74 3a 73 30 00 00 00 r:kernel_t:s0...
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888117fc1c80 (size 32):
comm "syz-executor002", pid 7080, jiffies 4294945384 (age 18.550s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 38 34 00 00 00 00 00 00 4294945384......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888122c0b620 (size 32):
comm "syz-executor002", pid 7059, jiffies 4294945363 (age 19.840s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 00 00 00 00 00 4294945363......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811819ce80 (size 32):
comm "syz-executor002", pid 7062, jiffies 4294945363 (age 19.840s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 00 00 00 00 00 4294945363......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811819c2c0 (size 32):
comm "syz-executor002", pid 7067, jiffies 4294945363 (age 19.840s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 73 74 65 6d 5f 4294945363.stem_
72 3a 6b 65 72 6e 65 6c 5f 74 3a 73 30 00 00 00 r:kernel_t:s0...
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888117fc1c80 (size 32):
comm "syz-executor002", pid 7080, jiffies 4294945384 (age 19.630s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 38 34 00 00 00 00 00 00 4294945384......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888122c0b620 (size 32):
comm "syz-executor002", pid 7059, jiffies 4294945363 (age 20.910s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 00 00 00 00 00 4294945363......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811819ce80 (size 32):
comm "syz-executor002", pid 7062, jiffies 4294945363 (age 20.910s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 00 00 00 00 00 4294945363......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811819c2c0 (size 32):
comm "syz-executor002", pid 7067, jiffies 4294945363 (age 20.910s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 73 74 65 6d 5f 4294945363.stem_
72 3a 6b 65 72 6e 65 6c 5f 74 3a 73 30 00 00 00 r:kernel_t:s0...
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888117fc1c80 (size 32):
comm "syz-executor002", pid 7080, jiffies 4294945384 (age 20.700s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 38 34 00 00 00 00 00 00 4294945384......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888122c0b620 (size 32):
comm "syz-executor002", pid 7059, jiffies 4294945363 (age 22.950s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 00 00 00 00 00 4294945363......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811819ce80 (size 32):
comm "syz-executor002", pid 7062, jiffies 4294945363 (age 22.950s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 00 00 00 00 00 4294945363......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811819c2c0 (size 32):
comm "syz-executor002", pid 7067, jiffies 4294945363 (age 22.950s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 73 74 65 6d 5f 4294945363.stem_
72 3a 6b 65 72 6e 65 6c 5f 74 3a 73 30 00 00 00 r:kernel_t:s0...
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888117fc1c80 (size 32):
comm "syz-executor002", pid 7080, jiffies 4294945384 (age 22.740s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 38 34 00 00 00 00 00 00 4294945384......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888122c0b620 (size 32):
comm "syz-executor002", pid 7059, jiffies 4294945363 (age 25.030s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 00 00 00 00 00 4294945363......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811819ce80 (size 32):
comm "syz-executor002", pid 7062, jiffies 4294945363 (age 25.030s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 00 00 00 00 00 4294945363......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811819c2c0 (size 32):
comm "syz-executor002", pid 7067, jiffies 4294945363 (age 25.030s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 73 74 65 6d 5f 4294945363.stem_
72 3a 6b 65 72 6e 65 6c 5f 74 3a 73 30 00 00 00 r:kernel_t:s0...
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888117fc1c80 (size 32):
comm "syz-executor002", pid 7080, jiffies 4294945384 (age 24.820s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 38 34 00 00 00 00 00 00 4294945384......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888122c0b620 (size 32):
comm "syz-executor002", pid 7059, jiffies 4294945363 (age 26.110s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 00 00 00 00 00 4294945363......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811819ce80 (size 32):
comm "syz-executor002", pid 7062, jiffies 4294945363 (age 26.110s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 00 00 00 00 00 4294945363......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811819c2c0 (size 32):
comm "syz-executor002", pid 7067, jiffies 4294945363 (age 26.110s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 36 33 00 73 74 65 6d 5f 4294945363.stem_
72 3a 6b 65 72 6e 65 6c 5f 74 3a 73 30 00 00 00 r:kernel_t:s0...
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888117fc1c80 (size 32):
comm "syz-executor002", pid 7080, jiffies 4294945384 (age 25.900s)
hex dump (first 32 bytes):
34 32 39 34 39 34 35 33 38 34 00 00 00 00 00 00 4294945384......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000914ad539>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000914ad539>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000914ad539>] slab_alloc mm/slab.c:3319 [inline]
[<00000000914ad539>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000d7aea07a>] kmalloc include/linux/slab.h:556 [inline]
[<00000000d7aea07a>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
[<00000000d7aea07a>] v9fs_cache_session_get_cookie+0xa6/0x110
fs/9p/cache.c:52
[<00000000fdcf7df2>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
[<000000001a42c839>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
[<00000000a90ee9c2>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
[<000000009bc32b08>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
[<000000005bc96ae8>] do_new_mount fs/namespace.c:2823 [inline]
[<000000005bc96ae8>] do_mount+0x95f/0xc60 fs/namespace.c:3143
[<000000002301e20b>] ksys_mount+0xab/0x120 fs/namespace.c:3352
[<000000001a409208>] __do_sys_mount fs/namespace.c:3366 [inline]
[<000000001a409208>] __se_sys_mount fs/namespace.c:3363 [inline]
[<000000001a409208>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
[<0000000033193570>] do_syscall_64+0x73/0x1f0
arch/x86/entry/common.c:290
[<00000000b1f42f27>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

executing program
executing program


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this bug report. See:
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syzbot can test patches for this bug, for details see:
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