syzbot


general protection fault in debugfs_remove (2)
Status: auto-closed as invalid on 2020/12/30 03:06
Reported-by: syzbot+dde889a3349692bc643e@syzkaller.appspotmail.com
First crash: 627d, last: 627d
similar bugs (4):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 general protection fault in debugfs_remove (2) 1 765d 765d 0/1 auto-closed as invalid on 2020/08/14 06:05
linux-4.19 general protection fault in debugfs_remove 1 1034d 1034d 0/1 auto-closed as invalid on 2019/11/19 00:32
linux-4.14 general protection fault in debugfs_remove 1 918d 918d 0/1 auto-closed as invalid on 2020/03/13 21:23
upstream general protection fault in debugfs_remove 1 1132d 1123d 0/22 auto-closed as invalid on 2019/10/12 06:37

Sample crash report:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 27731 Comm: syz-executor.3 Not tainted 4.19.142-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x1eb/0x3ff0 kernel/locking/lockdep.c:3294
Code: 2b 29 00 00 48 81 c4 98 01 00 00 44 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 b3 2a 00 00 49 81 3e 60 25 d4 8a 0f 84 65 ff ff
RSP: 0018:ffff88803bb0f898 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000027 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88808b16e440 R14: 0000000000000138 R15: 0000000000000001
FS:  00007efcd395c700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000006e83c000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3907
 down_write+0x34/0x90 kernel/locking/rwsem.c:70
 inode_lock include/linux/fs.h:748 [inline]
 debugfs_remove+0x8d/0x210 fs/debugfs/inode.c:688
 blk_trace_free+0x31/0x130 kernel/trace/blktrace.c:315
 blk_trace_cleanup kernel/trace/blktrace.c:343 [inline]
 __blk_trace_remove+0x8b/0x100 kernel/trace/blktrace.c:356
 blk_trace_ioctl+0x23b/0x290 kernel/trace/blktrace.c:746
 blkdev_ioctl+0x112/0x1a7e block/ioctl.c:587
 block_ioctl+0xe9/0x130 fs/block_dev.c:1896
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45d5b9
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:00007efcd395bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000008f80 RCX: 000000000045d5b9
RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000004
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffe1983fdcf R14: 00007efcd395c9c0 R15: 000000000118cf4c
Modules linked in:
---[ end trace 0f7af2eb2b2f8509 ]---
RIP: 0010:__lock_acquire+0x1eb/0x3ff0 kernel/locking/lockdep.c:3294
Code: 2b 29 00 00 48 81 c4 98 01 00 00 44 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 b3 2a 00 00 49 81 3e 60 25 d4 8a 0f 84 65 ff ff
RSP: 0018:ffff88803bb0f898 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000027 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88808b16e440 R14: 0000000000000138 R15: 0000000000000001
FS:  00007efcd395c700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000006e83c000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-19 2020/09/01 03:05 linux-4.19.y f6d5cb9e2c06 d5a3ae1f .config log report