INFO: trying to register non-static key in vma_link

From: syzbot
Date: Sat Sep 19 2020 - 09:43:12 EST


syzbot found the following issue on:

HEAD commit: fc4f28bb Merge tag 'for-5.9-rc5-tag' of git://git.kernel.o..
git tree: upstream
console output:
kernel config:
dashboard link:
compiler: gcc (GCC) 10.1.0-syz 20200507

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+2b5fc781c93512ef418c@xxxxxxxxxxxxxxxxxxxxxxxxx

INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 0 PID: 9051 Comm: syz-executor.5 Not tainted 5.9.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x198/0x1fd lib/dump_stack.c:118
assign_lock_key kernel/locking/lockdep.c:894 [inline]
register_lock_class+0x157d/0x1630 kernel/locking/lockdep.c:1206
__lock_acquire+0xf9/0x5570 kernel/locking/lockdep.c:4305
lock_acquire+0x1f3/0xae0 kernel/locking/lockdep.c:5006
down_write+0x8d/0x150 kernel/locking/rwsem.c:1531
i_mmap_lock_write include/linux/fs.h:498 [inline]
vma_link+0x9e/0x830 mm/mmap.c:651
mmap_region+0xcd8/0x1780 mm/mmap.c:1815
do_mmap+0xcf9/0x11d0 mm/mmap.c:1545
aio_setup_ring fs/aio.c:528 [inline]
ioctx_alloc+0x881/0x1d70 fs/aio.c:760
__do_sys_io_setup fs/aio.c:1329 [inline]
__se_sys_io_setup fs/aio.c:1312 [inline]
__x64_sys_io_setup+0xc4/0x3d0 fs/aio.c:1312
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
RIP: 0033:0x45d5f9
Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa4d2ef3c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000ce
RAX: ffffffffffffffda RBX: 0000000000008240 RCX: 000000000045d5f9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000002
RBP: 000000000118cf78 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 000000000169fb6f R14: 00007fa4d2ef49c0 R15: 000000000118cf4c
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON(sem->magic != sem): count = 0x1, magic = 0x0, owner = 0xffff88808cb38100, curr 0xffff88808cb38100, list not empty
WARNING: CPU: 0 PID: 9051 at kernel/locking/rwsem.c:1450 __up_write kernel/locking/rwsem.c:1450 [inline]
WARNING: CPU: 0 PID: 9051 at kernel/locking/rwsem.c:1450 up_write+0x381/0x560 kernel/locking/rwsem.c:1584

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