Messages in this thread |  | | Date | Tue, 04 Feb 2020 09:58:13 -0800 | Subject | memory leak in tcindex_set_parms | From | syzbot <> |
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Hello,
syzbot found the following crash on:
HEAD commit: 322bf2d3 Merge branch 'for-5.6' of git://git.kernel.org/pu.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1111f8e6e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=8d0490614a000a37 dashboard link: https://syzkaller.appspot.com/bug?extid=f0bbb2287b8993d4fa74 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17db90f6e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13a94511e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+f0bbb2287b8993d4fa74@syzkaller.appspotmail.com
executing program executing program BUG: memory leak unreferenced object 0xffff88811ee18c00 (size 256): comm "syz-executor278", pid 7255, jiffies 4294941828 (age 13.710s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000004705b10>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<0000000004705b10>] slab_post_alloc_hook mm/slab.h:586 [inline] [<0000000004705b10>] slab_alloc mm/slab.c:3320 [inline] [<0000000004705b10>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3549 [<000000005a926de7>] kmalloc include/linux/slab.h:556 [inline] [<000000005a926de7>] kmalloc_array include/linux/slab.h:597 [inline] [<000000005a926de7>] kcalloc include/linux/slab.h:609 [inline] [<000000005a926de7>] tcf_exts_init include/net/pkt_cls.h:210 [inline] [<000000005a926de7>] tcindex_set_parms+0xac/0x970 net/sched/cls_tcindex.c:313 [<000000004198237d>] tcindex_change+0xd8/0x110 net/sched/cls_tcindex.c:519 [<00000000f90be4e9>] tc_new_tfilter+0x566/0xf50 net/sched/cls_api.c:2103 [<00000000bdffab68>] rtnetlink_rcv_msg+0x3b2/0x4b0 net/core/rtnetlink.c:5429 [<000000008de6f6fa>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477 [<00000000637db501>] rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5456 [<00000000cb1396a7>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] [<00000000cb1396a7>] netlink_unicast+0x223/0x310 net/netlink/af_netlink.c:1328 [<000000003d9f7439>] netlink_sendmsg+0x2c0/0x570 net/netlink/af_netlink.c:1917 [<0000000004922ee9>] sock_sendmsg_nosec net/socket.c:652 [inline] [<0000000004922ee9>] sock_sendmsg+0x54/0x70 net/socket.c:672 [<00000000bbc6917f>] ____sys_sendmsg+0x2d0/0x300 net/socket.c:2343 [<00000000d3ae3854>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2397 [<0000000000c5372b>] __sys_sendmsg+0x80/0xf0 net/socket.c:2430 [<00000000db15859a>] __do_sys_sendmsg net/socket.c:2439 [inline] [<00000000db15859a>] __se_sys_sendmsg net/socket.c:2437 [inline] [<00000000db15859a>] __x64_sys_sendmsg+0x23/0x30 net/socket.c:2437 [<00000000a5a1c036>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294 [<00000000e73613df>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak unreferenced object 0xffff88811ee18900 (size 256): comm "syz-executor278", pid 7255, jiffies 4294941828 (age 13.710s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000004705b10>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<0000000004705b10>] slab_post_alloc_hook mm/slab.h:586 [inline] [<0000000004705b10>] slab_alloc mm/slab.c:3320 [inline] [<0000000004705b10>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3549 [<0000000036dbc592>] kmalloc include/linux/slab.h:556 [inline] [<0000000036dbc592>] kmalloc_array include/linux/slab.h:597 [inline] [<0000000036dbc592>] kcalloc include/linux/slab.h:609 [inline] [<0000000036dbc592>] tcf_exts_init include/net/pkt_cls.h:210 [inline] [<0000000036dbc592>] tcindex_alloc_perfect_hash net/sched/cls_tcindex.c:287 [inline] [<0000000036dbc592>] tcindex_alloc_perfect_hash+0x8f/0xf0 net/sched/cls_tcindex.c:277 [<0000000088e6ec51>] tcindex_set_parms+0x831/0x970 net/sched/cls_tcindex.c:405 [<000000004198237d>] tcindex_change+0xd8/0x110 net/sched/cls_tcindex.c:519 [<00000000f90be4e9>] tc_new_tfilter+0x566/0xf50 net/sched/cls_api.c:2103 [<00000000bdffab68>] rtnetlink_rcv_msg+0x3b2/0x4b0 net/core/rtnetlink.c:5429 [<000000008de6f6fa>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477 [<00000000637db501>] rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5456 [<00000000cb1396a7>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] [<00000000cb1396a7>] netlink_unicast+0x223/0x310 net/netlink/af_netlink.c:1328 [<000000003d9f7439>] netlink_sendmsg+0x2c0/0x570 net/netlink/af_netlink.c:1917 [<0000000004922ee9>] sock_sendmsg_nosec net/socket.c:652 [inline] [<0000000004922ee9>] sock_sendmsg+0x54/0x70 net/socket.c:672 [<00000000bbc6917f>] ____sys_sendmsg+0x2d0/0x300 net/socket.c:2343 [<00000000d3ae3854>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2397 [<0000000000c5372b>] __sys_sendmsg+0x80/0xf0 net/socket.c:2430 [<00000000db15859a>] __do_sys_sendmsg net/socket.c:2439 [inline] [<00000000db15859a>] __se_sys_sendmsg net/socket.c:2437 [inline] [<00000000db15859a>] __x64_sys_sendmsg+0x23/0x30 net/socket.c:2437 [<00000000a5a1c036>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
BUG: memory leak unreferenced object 0xffff88811ee18800 (size 256): comm "syz-executor278", pid 7255, jiffies 4294941828 (age 13.710s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000004705b10>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<0000000004705b10>] slab_post_alloc_hook mm/slab.h:586 [inline] [<0000000004705b10>] slab_alloc mm/slab.c:3320 [inline] [<0000000004705b10>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3549 [<0000000036dbc592>] kmalloc include/linux/slab.h:556 [inline] [<0000000036dbc592>] kmalloc_array include/linux/slab.h:597 [inline] [<0000000036dbc592>] kcalloc include/linux/slab.h:609 [inline] [<0000000036dbc592>] tcf_exts_init include/net/pkt_cls.h:210 [inline] [<0000000036dbc592>] tcindex_alloc_perfect_hash net/sched/cls_tcindex.c:287 [inline] [<0000000036dbc592>] tcindex_alloc_perfect_hash+0x8f/0xf0 net/sched/cls_tcindex.c:277 [<0000000088e6ec51>] tcindex_set_parms+0x831/0x970 net/sched/cls_tcindex.c:405 [<000000004198237d>] tcindex_change+0xd8/0x110 net/sched/cls_tcindex.c:519 [<00000000f90be4e9>] tc_new_tfilter+0x566/0xf50 net/sched/cls_api.c:2103 [<00000000bdffab68>] rtnetlink_rcv_msg+0x3b2/0x4b0 net/core/rtnetlink.c:5429 [<000000008de6f6fa>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477 [<00000000637db501>] rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5456 [<00000000cb1396a7>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] [<00000000cb1396a7>] netlink_unicast+0x223/0x310 net/netlink/af_netlink.c:1328 [<000000003d9f7439>] netlink_sendmsg+0x2c0/0x570 net/netlink/af_netlink.c:1917 [<0000000004922ee9>] sock_sendmsg_nosec net/socket.c:652 [inline] [<0000000004922ee9>] sock_sendmsg+0x54/0x70 net/socket.c:672 [<00000000bbc6917f>] ____sys_sendmsg+0x2d0/0x300 net/socket.c:2343 [<00000000d3ae3854>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2397 [<0000000000c5372b>] __sys_sendmsg+0x80/0xf0 net/socket.c:2430 [<00000000db15859a>] __do_sys_sendmsg net/socket.c:2439 [inline] [<00000000db15859a>] __se_sys_sendmsg net/socket.c:2437 [inline] [<00000000db15859a>] __x64_sys_sendmsg+0x23/0x30 net/socket.c:2437 [<00000000a5a1c036>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
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