syzbot


WARNING in iomap_iter (3)

Status: closed as invalid on 2024/10/15 10:39
Subsystems: erofs
[Documentation on labels]
Reported-by: syzbot+74cc7d98ae5484c2744d@syzkaller.appspotmail.com
First crash: 29d, last: 27d
Cause bisection: introduced by (bisect log) :
commit 56bd565ea59192bbc7d5bbcea155e861a20393f4
Author: Gao Xiang <hsiangkao@linux.alibaba.com>
Date: Thu Oct 10 09:04:20 2024 +0000

  erofs: get rid of kaddr in `struct z_erofs_maprecorder`

Crash: WARNING in iomap_iter (log)
Repro: C syz .config
  
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [iomap?] WARNING in iomap_iter (3) 4 (7) 2024/10/15 10:39
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in iomap_iter origin:lts-only C done 18 155d 222d 0/3 upstream: reported C repro on 2024/04/01 07:45
upstream WARNING in iomap_iter iomap C inconclusive 141 670d 1096d 22/28 fixed on 2023/06/12 19:24
upstream WARNING in iomap_iter (2) iomap C 4 195d 191d 25/28 fixed on 2024/06/05 13:52
Last patch testing requests (2)
Created Duration User Patch Repo Result
2024/10/15 09:46 21m hsiangkao@linux.alibaba.com git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git erofs-for-6.12-rc4-fixes OK log
2024/10/15 09:23 21m hsiangkao@linux.alibaba.com git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git next-20241014 OK log

Sample crash report:
erofs: (device loop0): mounted with root inode @ nid 36.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5233 at fs/iomap/iter.c:51 iomap_iter_done fs/iomap/iter.c:51 [inline]
WARNING: CPU: 1 PID: 5233 at fs/iomap/iter.c:51 iomap_iter+0x9db/0xf60 fs/iomap/iter.c:95
Modules linked in:
CPU: 1 UID: 0 PID: 5233 Comm: syz-executor323 Not tainted 6.12.0-rc2-next-20241011-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:iomap_iter_done fs/iomap/iter.c:51 [inline]
RIP: 0010:iomap_iter+0x9db/0xf60 fs/iomap/iter.c:95
Code: 0f 0b 90 e9 0a f9 ff ff e8 d2 10 62 ff 90 0f 0b 90 e9 42 fd ff ff e8 c4 10 62 ff 90 0f 0b 90 e9 71 fd ff ff e8 b6 10 62 ff 90 <0f> 0b 90 e9 d5 fd ff ff e8 a8 10 62 ff 90 0f 0b 90 43 80 3c 2e 00
RSP: 0018:ffffc900036af6e0 EFLAGS: 00010293
RAX: ffffffff8232e26a RBX: 0000000000004000 RCX: ffff88802b559e00
RDX: 0000000000000000 RSI: 0000000000018057 RDI: 0000000000004000
RBP: 0000000000018057 R08: ffffffff8232e03a R09: 1ffffd40001490be
R10: dffffc0000000000 R11: fffff940001490bf R12: 1ffff920006d5f05
R13: dffffc0000000000 R14: 1ffff920006d5f04 R15: ffffc900036af820
FS:  000055556b120380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000066c7e0 CR3: 000000007edfe000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 iomap_fiemap+0x73b/0x9b0 fs/iomap/fiemap.c:80
 ioctl_fiemap fs/ioctl.c:220 [inline]
 do_vfs_ioctl+0x1bf8/0x2e40 fs/ioctl.c:841
 __do_sys_ioctl fs/ioctl.c:905 [inline]
 __se_sys_ioctl+0x81/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5ca9685679
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd8eaa5b98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffd8eaa5d68 RCX: 00007f5ca9685679
RDX: 0000000020000040 RSI: 00000000c020660b RDI: 0000000000000004
RBP: 00007f5ca96f8610 R08: 0000000000000000 R09: 00007ffd8eaa5d68
R10: 00000000000001e1 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd8eaa5d58 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Crashes (29):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/10/11 23:35 linux-next d61a00525464 cd942402 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/13 15:26 linux-next d61a00525464 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/13 15:25 linux-next d61a00525464 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/13 15:24 linux-next d61a00525464 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/13 15:24 linux-next d61a00525464 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/13 10:52 linux-next d61a00525464 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/13 10:51 linux-next d61a00525464 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/12 18:35 linux-next d61a00525464 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/12 18:35 linux-next d61a00525464 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/12 13:02 linux-next d61a00525464 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 18:42 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 18:42 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 17:14 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 17:11 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 16:57 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 16:56 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 16:56 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 16:32 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 16:24 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 16:05 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 16:03 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 12:59 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 12:57 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 12:00 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 11:59 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 09:16 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 09:16 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 08:53 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
2024/10/11 08:53 linux-next d61a00525464 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iomap_iter
* Struck through repros no longer work on HEAD.