syzbot


WARNING in iov_iter_revert (5)

Status: upstream: reported C repro on 2024/08/20 14:21
Subsystems: ntfs3
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+1e5f71cac2c1db825478@syzkaller.appspotmail.com
First crash: 647d, last: 6d01h
Cause bisection: failed (error log, bisect log)
  
Fix bisection: failed (error log, bisect log)
  
✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision Error
df51cd76-8c81-4110-9cd6-7e799474f85a assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ✅ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ WARNING in iov_iter_revert (5) 2026/05/24 11:14 2026/05/24 11:14 2026/05/24 12:17 c69befb30ac10e158cc9d1557b508ee3f0eca1de
20688c9a-ee2c-41e8-88fc-c1b3f4607652 patching 💥 WARNING in iov_iter_revert (5) 2026/05/18 16:39 2026/05/18 17:01 2026/05/18 17:44 9f74d39908454b73546eaf1b8211b48b66e5c0fe reproducer did not crash
Discussions (2)
Title Replies (including bot) Last reply
[syzbot] Monthly ntfs3 report (Apr 2026) 0 (1) 2026/04/01 07:42
[syzbot] [ntfs3?] WARNING in iov_iter_revert (5) 0 (1) 2024/08/20 14:21
Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in iov_iter_revert net -1 C 74 2868d 2934d 8/29 fixed on 2018/08/07 13:43
upstream WARNING in iov_iter_revert (2) serial -1 C done 9 1923d 1924d 20/29 fixed on 2021/04/09 19:46
linux-6.1 WARNING in iov_iter_revert origin:lts-only -1 C done 1 962d 1016d 0/3 upstream: reported C repro on 2023/08/13 18:12
upstream WARNING in iov_iter_revert (4) ntfs3 -1 C done error 4 1030d 1083d 0/29 auto-obsoleted due to no activity on 2023/11/08 23:39
upstream WARNING in iov_iter_revert (3) ntfs3 -1 C error error 26 1219d 1277d 0/29 auto-obsoleted due to no activity on 2023/05/23 03:07
linux-5.15 WARNING in iov_iter_revert origin:lts-only -1 C done 1 13d 1063d 0/3 upstream: reported C repro on 2023/06/28 09:07
Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/04/22 08:53 1h56m retest repro upstream OK log
2026/04/22 08:53 32m retest repro upstream OK log
2026/04/22 04:10 31m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci error
2026/03/01 23:44 21m retest repro upstream OK log
2026/02/06 11:47 3h52m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci error
2026/01/22 01:54 14m retest repro upstream report log
2026/01/22 01:54 14m retest repro upstream report log
2025/12/21 21:12 14m retest repro upstream report log
2025/11/28 09:52 24m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2025/10/31 13:08 14m retest repro upstream report log

Sample crash report:
exFAT-fs (loop0): valid_size(150994954) is greater than size(10)
------------[ cut here ]------------
unroll > MAX_RW_COUNT
WARNING: lib/iov_iter.c:624 at iov_iter_revert+0x58a/0x5f0 lib/iov_iter.c:624, CPU#1: syz.0.21/5926
Modules linked in:
CPU: 1 UID: 0 PID: 5926 Comm: syz.0.21 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:iov_iter_revert+0x58a/0x5f0 lib/iov_iter.c:624
Code: 5c 24 30 74 08 48 89 df e8 43 b9 8b fd 4c 89 2b 48 83 c4 38 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 87 ac 24 fd 90 <0f> 0b 90 eb e1 e8 7c ac 24 fd eb da 89 d9 80 e1 07 38 c1 0f 8c e6
RSP: 0018:ffffc900043f7bb8 EFLAGS: 00010293
RAX: ffffffff849fca49 RBX: ffffc900043f7d70 RCX: ffff888030fc1ec0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000005 R12: 1ffff9200087efb1
R13: 0000000000001000 R14: ffffc900043f7d88 R15: fffffffffffff00a
FS:  00007fa07301e6c0(0000) GS:ffff888126276000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000140a CR3: 0000000024cd4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 generic_file_read_iter+0x38f/0x520 mm/filemap.c:2981
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x58b/0xa80 fs/read_write.c:574
 ksys_read+0x156/0x270 fs/read_write.c:717
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa0739bcdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa07301e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fa073c35fa0 RCX: 00007fa0739bcdd9
RDX: 0000000000001000 RSI: 0000200000001400 RDI: 0000000000000004
RBP: 00007fa073a52d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa073c36038 R14: 00007fa073c35fa0 R15: 00007ffef46a96c8
 </TASK>

Crashes (80):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/05/12 06:12 upstream 50897c955902 d168f260 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs WARNING in iov_iter_revert
2025/09/03 22:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 96a211bc .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 WARNING in iov_iter_revert
2026/05/20 09:01 upstream 27fa82620cba 0909d65f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/13 15:00 upstream 1d5dcaa3bd65 fec2a7ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/13 10:50 upstream 1d5dcaa3bd65 fec2a7ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/13 09:52 upstream 1d5dcaa3bd65 fec2a7ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/13 06:28 upstream c21b90f77687 a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 20:40 upstream c21b90f77687 a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 19:15 upstream c21b90f77687 07aeade5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 10:25 upstream 50897c955902 07aeade5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 08:53 upstream 50897c955902 07aeade5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 08:22 upstream 50897c955902 07aeade5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 05:03 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 05:03 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 04:55 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 04:51 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 04:46 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 04:45 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 04:44 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 04:44 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 04:42 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 04:41 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 04:39 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 04:38 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 04:38 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/04/08 02:40 upstream 3036cd0d3328 2c961e87 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/04/06 10:16 upstream 591cd656a1bf 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/04/02 14:56 upstream 9147566d8016 91bc79b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/04/01 17:22 upstream 9147566d8016 9a1f7828 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/03/25 16:10 upstream bbeb83d3182a 8ee77f7d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/03/25 13:06 upstream bbeb83d3182a 8ee77f7d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/02/11 18:53 upstream 192c0159402e 75707236 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/01/07 21:56 upstream f0b9d8eb98df d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/01/06 01:06 upstream 7f98ab9da046 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2025/12/31 18:15 upstream c8ebd433459b d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in iov_iter_revert
2025/12/31 17:01 upstream c8ebd433459b d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2025/10/16 10:59 upstream 7ea30958b305 19568248 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2025/09/26 10:24 upstream 4ff71af020ae 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in iov_iter_revert
2025/01/22 17:38 upstream c4b9570cfb63 a44b0418 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-upstream-fs WARNING in iov_iter_revert
2025/01/22 16:34 upstream c4b9570cfb63 a44b0418 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2025/01/22 16:34 upstream c4b9570cfb63 a44b0418 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2024/10/16 05:27 upstream 2f87d0916ce0 bde2d81c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2024/08/16 21:16 upstream d7a5aa4b3c00 e1c76ab2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-upstream-fs WARNING in iov_iter_revert
2024/08/16 16:08 upstream d7a5aa4b3c00 e1c76ab2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in iov_iter_revert
2024/08/16 14:16 upstream d7a5aa4b3c00 e1c76ab2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in iov_iter_revert
2026/05/12 14:34 linux-next e98d21c170b0 d5b1a17d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iov_iter_revert
2026/05/12 12:00 linux-next e98d21c170b0 d5b1a17d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iov_iter_revert
2026/05/12 11:59 linux-next e98d21c170b0 d5b1a17d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in iov_iter_revert
2025/09/03 21:35 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 96a211bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in iov_iter_revert
* Struck through repros no longer work on HEAD.