syzbot


WARNING in ifs_free

Status: upstream: reported C repro on 2026/01/15 08:12
Subsystems: ntfs3 iomap
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+d3a62bea0e61f9d121da@syzkaller.appspotmail.com
First crash: 160d, last: 7h32m
Cause bisection: failed (error log, bisect log)
  
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ID Workflow Result Correct Bug Created Started Finished Revision Error
59ca75d0-a62f-4f7f-9d44-37f11507a45e assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ✅ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ WARNING in ifs_free 2026/05/17 09:31 2026/05/17 09:31 2026/05/17 10:26 de5aae85e5f28e2fa1c7deefcc24fe286abe5140

			
		
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[syzbot] [iomap?] WARNING in ifs_free 2 (4) 2026/02/20 17:07

Sample crash report:
------------[ cut here ]------------
ifs_is_fully_uptodate(folio, ifs) != folio_test_uptodate(folio)
WARNING: fs/iomap/buffered-io.c:264 at ifs_free+0x35e/0x420 fs/iomap/buffered-io.c:263, CPU#1: syz-executor/5746
Modules linked in:
CPU: 1 UID: 0 PID: 5746 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:ifs_free+0x35e/0x420 fs/iomap/buffered-io.c:263
Code: 41 5f 5d e9 84 a0 c3 ff e8 8f 27 68 ff 90 0f 0b 90 e9 cd fe ff ff e8 81 27 68 ff 90 0f 0b 90 e9 0a ff ff ff e8 73 27 68 ff 90 <0f> 0b 90 eb c3 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 00 fe ff ff
RSP: 0000:ffffc9000414f688 EFLAGS: 00010293
RAX: ffffffff825c51ed RBX: 0000000000000008 RCX: ffff888031a05c40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000825cca01 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000320201 R12: ffff88802babb184
R13: ffff88802babb100 R14: ffffea0001901000 R15: 1ffffd4000320201
FS:  0000555590399500(0000) GS:ffff888126273000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4852814001 CR3: 000000002a460000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 folio_invalidate mm/truncate.c:140 [inline]
 truncate_cleanup_folio+0xcb/0x190 mm/truncate.c:160
 truncate_inode_pages_range+0x2d1/0xe30 mm/truncate.c:404
 ntfs_evict_inode+0x19/0x40 fs/ntfs3/inode.c:1813
 evict+0x61e/0xb10 fs/inode.c:841
 dispose_list fs/inode.c:883 [inline]
 evict_inodes+0x75a/0x7f0 fs/inode.c:937
 generic_shutdown_super+0xaa/0x2d0 fs/super.c:632
 kill_block_super+0x44/0x90 fs/super.c:1725
 ntfs3_kill_sb+0x44/0x1c0 fs/ntfs3/super.c:1911
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0xf3/0x4d0 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f639b8ee097
Code: a2 c7 05 5c 06 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe1c224288 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f639b9821ca RCX: 00007f639b8ee097
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe1c224340
RBP: 00007ffe1c224340 R08: 00007ffe1c225340 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe1c2253d0
R13: 00007f639b9821ca R14: 00000000000283f2 R15: 00007ffe1c225410
 </TASK>

Crashes (1050):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/05/17 06:07 upstream 6916d5703ddf de5aae85 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in ifs_free
2026/02/20 09:50 upstream 8bf22c33e7a1 17d780d6 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in ifs_free
2026/02/19 20:51 upstream 2b7a25df823d 73a252ac .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in ifs_free
2026/06/20 16:17 upstream 1a3746ccbb0a 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/20 13:29 upstream 1a3746ccbb0a 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/20 00:59 upstream 5e2e14749c3d 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/18 18:16 upstream e771677c937d a776b0d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/18 00:38 upstream 66affa37cfac b62b3ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/17 17:01 upstream 66affa37cfac b62b3ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/17 16:51 upstream 66affa37cfac b62b3ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/15 20:43 upstream 0e0611827f33 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/14 21:59 upstream e21ee273e6fa 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in ifs_free
2026/06/14 05:34 upstream 2b07ea76fd28 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/13 17:52 upstream 062871f1371b 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in ifs_free
2026/06/13 08:46 upstream 062871f1371b 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in ifs_free
2026/06/13 01:05 upstream 1dadb7e7eb5a 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/12 19:08 upstream 1dadb7e7eb5a 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in ifs_free
2026/06/12 14:04 upstream 2b414a95b8f7 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in ifs_free
2026/06/12 07:40 upstream 2b414a95b8f7 e93da63e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in ifs_free
2026/06/11 16:59 upstream 9716c086c8e8 d93a6ab6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/11 16:52 upstream 9716c086c8e8 d93a6ab6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/10 17:42 upstream acb7500801e9 f79bac11 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/09 04:27 upstream 2d3090a8aeb5 656e94c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/09 02:51 upstream 2d3090a8aeb5 656e94c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/08 04:58 upstream 33d8d8ec31b5 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/06 21:42 upstream 8e65320d91cd cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/06 06:15 upstream c10130c234c8 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/05 03:18 upstream 9154c4af7829 197909be .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/04 16:59 upstream ba3e43a9e601 197909be .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/02 21:47 upstream ba3e43a9e601 62fe1528 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/02 21:29 upstream ba3e43a9e601 62fe1528 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/02 13:17 upstream 6f3ed7fec72f 62fe1528 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/01 17:06 upstream e43ffb69e043 8d8eeb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/06/01 15:29 upstream e43ffb69e043 8d8eeb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/31 17:45 upstream 174914ea5513 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/31 16:44 upstream 174914ea5513 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in ifs_free
2026/05/31 01:12 upstream 9d87d0fc8c8e 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/30 17:31 upstream f5e5d3509bff 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/30 08:02 upstream 9215e74f228f 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/30 03:29 upstream 9215e74f228f 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/29 11:06 upstream 8fde5d1d47f6 4624854e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/29 03:20 upstream 8fde5d1d47f6 4624854e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/29 00:32 upstream 8fde5d1d47f6 4624854e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in ifs_free
2026/05/28 22:50 upstream 8fde5d1d47f6 681715f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/28 21:16 upstream eb3f4b7426cf 681715f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/28 18:43 upstream eb3f4b7426cf 681715f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/28 06:31 upstream eb3f4b7426cf 4c36e7e5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/28 04:25 upstream eb3f4b7426cf 4c36e7e5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/28 01:15 upstream eb3f4b7426cf 4c36e7e5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/27 17:52 upstream eb3f4b7426cf 8777bdc3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/27 15:15 upstream eb3f4b7426cf 8777bdc3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/05/19 19:16 upstream ab5fce87a778 223544dc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in ifs_free
2026/05/18 16:51 upstream 5200f5f493f7 143ffb88 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ifs_free
2026/05/15 11:41 linux-next e98d21c170b0 9cd3beaa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in ifs_free
2026/01/11 08:08 linux-next f417b7ffcbef d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in ifs_free
2026/01/11 08:07 linux-next f417b7ffcbef d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in ifs_free
* Struck through repros no longer work on HEAD.