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SubjectWARNING in pstore_kill_sb
From
Hello,

syzbot found the following issue on:

HEAD commit: e0756cfc Merge tag 'trace-v5.11-rc7' of git://git.kernel.o..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10692850d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=b9a66c874a03a1ed
dashboard link: https://syzkaller.appspot.com/bug?extid=d0cf0ad6513e9a1da5df
userspace arch: arm

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d0cf0ad6513e9a1da5df@syzkaller.appspotmail.com

do_el0_svc_compat+0x40/0x80 arch/arm64/kernel/syscall.c:204
el0_svc_compat+0x20/0x30 arch/arm64/kernel/entry-common.c:442
el0_sync_compat_handler+0x90/0x140 arch/arm64/kernel/entry-common.c:451
el0_sync_compat+0x178/0x180 arch/arm64/kernel/entry.S:708
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5780 at fs/pstore/inode.c:470 pstore_kill_sb+0x88/0x90 fs/pstore/inode.c:480
Modules linked in:
CPU: 0 PID: 5780 Comm: syz-executor.1 Not tainted 5.11.0-rc7-syzkaller-00002-ge0756cfc7d7c #0
Hardware name: linux,dummy-virt (DT)
pstate: 00000005 (nzcv daif -PAN -UAO -TCO BTYPE=--)
pc : pstore_kill_sb+0x88/0x90 fs/pstore/inode.c:470
lr : pstore_kill_sb+0x30/0x90 fs/pstore/inode.c:469
sp : ffff00001d1e7a70
x29: ffff00001d1e7a70 x28: 0000000000000004
x27: 0000000000008000 x26: ffff000016070a00
x25: 0000000000000000 x24: ffff00000df2e068
x23: 1fffe00001be5c0d x22: ffff800011edf070
x21: ffff80001bbea000 x20: ffff00000df2e000
x19: ffff800019a97a20 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000002
x15: ffff800019c06380 x14: 1fffe00003a3cee8
x13: 0000000000000000 x12: ffff700003352f45
x11: 1ffff00003352f44 x10: ffff700003352f44
x9 : dfff800000000000 x8 : ffff800019a97a27
x7 : 0000000000000001 x6 : 00008ffffccad0bc
x5 : ffff800019a97a20 x4 : 1fffe00001de59a9
x3 : 0000000000000000 x2 : 0000000000000000
x1 : ffff00000ef2cd40 x0 : 0000000000000000
Call trace:
pstore_kill_sb+0x88/0x90 fs/pstore/inode.c:480
deactivate_locked_super+0x94/0x154 fs/super.c:335
mount_single+0x114/0x180 fs/super.c:1470
pstore_mount+0x1c/0x30 fs/pstore/inode.c:464
legacy_get_tree+0xd0/0x190 fs/fs_context.c:592
vfs_get_tree+0x74/0x2a0 fs/super.c:1496
do_new_mount fs/namespace.c:2881 [inline]
path_mount+0xf64/0x2170 fs/namespace.c:3211
do_mount fs/namespace.c:3224 [inline]
__do_sys_mount fs/namespace.c:3432 [inline]
__se_sys_mount fs/namespace.c:3409 [inline]
__arm64_sys_mount+0x2ec/0x520 fs/namespace.c:3409
__invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
invoke_syscall arch/arm64/kernel/syscall.c:49 [inline]
el0_svc_common.constprop.0+0x110/0x3c0 arch/arm64/kernel/syscall.c:159
do_el0_svc_compat+0x40/0x80 arch/arm64/kernel/syscall.c:204
el0_svc_compat+0x20/0x30 arch/arm64/kernel/entry-common.c:442
el0_sync_compat_handler+0x90/0x140 arch/arm64/kernel/entry-common.c:451
el0_sync_compat+0x178/0x180 arch/arm64/kernel/entry.S:708


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot will keep track of this issue. See:
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