syzbot


stack segment fault in writeback_single_inode

Status: auto-obsoleted due to no activity on 2022/11/26 00:41
Reported-by: syzbot+aa67a71dc13ddcba2b82@syzkaller.appspotmail.com
First crash: 91d, last: 91d

Sample crash report:
stack segment: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 2367 Comm: syz-executor.4 Not tainted 6.0.0-rc2-syzkaller-00248-ge022620b5d05 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:writeback_single_inode+0x81/0x4c0 fs/fs-writeback.c:1678
Code: 83 c0 03 38 d0 7c 08 84 d2 0f 85 d4 03 00 00 8b 9d 08 02 00 00 31 ff 89 de e8 8b 47 98 ff 85 db 0f 85 17 03 00 00 e8 be 4a 98 <ff> 4c 8d ad d8 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48
RSP: 0018:ffffc90019097a10 EFLAGS: 00010216
RAX: 0000000000017149 RBX: 0000000000000000 RCX: ffffc9000b572000
RDX: 0000000000040000 RSI: ffffffff81e3c042 RDI: 0000000000000005
RBP: ffff888039ae70f0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90019097a88
R13: ffff888039ae72f8 R14: ffff888039ae7178 R15: ffff888039ae71c8
FS:  00007f7808d14700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb6108d53a5 CR3: 000000007d8d2000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 write_inode_now+0x16a/0x1e0 fs/fs-writeback.c:2723
 iput_final fs/inode.c:1735 [inline]
 iput.part.0+0x45b/0x810 fs/inode.c:1774
 iput+0x58/0x70 fs/inode.c:1764
 ntfs_fill_super+0x2e89/0x37f0 fs/ntfs3/super.c:1190
 get_tree_bdev+0x440/0x760 fs/super.c:1323
 vfs_get_tree+0x89/0x2f0 fs/super.c:1530
 do_new_mount fs/namespace.c:3040 [inline]
 path_mount+0x1326/0x1e20 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7807c8a7aa
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7808d13f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f7807c8a7aa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f7808d13fe0
RBP: 00007f7808d14020 R08: 00007f7808d14020 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f7808d13fe0 R15: 000000002007aa80
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:writeback_single_inode+0x81/0x4c0 fs/fs-writeback.c:1678
Code: 83 c0 03 38 d0 7c 08 84 d2 0f 85 d4 03 00 00 8b 9d 08 02 00 00 31 ff 89 de e8 8b 47 98 ff 85 db 0f 85 17 03 00 00 e8 be 4a 98 <ff> 4c 8d ad d8 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48
RSP: 0018:ffffc90019097a10 EFLAGS: 00010216
RAX: 0000000000017149 RBX: 0000000000000000 RCX: ffffc9000b572000
RDX: 0000000000040000 RSI: ffffffff81e3c042 RDI: 0000000000000005
RBP: ffff888039ae70f0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90019097a88
R13: ffff888039ae72f8 R14: ffff888039ae7178 R15: ffff888039ae71c8
FS:  00007f7808d14700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb6108d53a5 CR3: 000000007d8d2000 CR4: 0000000000350ef0

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2022/08/28 00:40 upstream e022620b5d05 07177916 .config log report info stack segment fault in writeback_single_inode
* Struck through repros no longer work on HEAD.