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: 207d, last: 3d04h
Cause bisection: failed (error log, bisect log)
  
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ID Workflow Result Correct Bug Created Started Finished Revision
59ca75d0 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 de5aae85
Discussions (1)
Title Replies (including bot) Last reply
[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:289 at ifs_free+0x34a/0x410 fs/iomap/buffered-io.c:288, CPU#1: syz-executor/5762
Modules linked in:
CPU: 1 UID: 0 PID: 5762 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:ifs_free+0x34a/0x410 fs/iomap/buffered-io.c:288
Code: 41 5f 5d e9 58 94 c2 ff e8 93 f8 64 ff 90 0f 0b 90 e9 d5 fe ff ff e8 85 f8 64 ff 90 0f 0b 90 e9 12 ff ff ff e8 77 f8 64 ff 90 <0f> 0b 90 eb c7 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 08 fe ff ff
RSP: 0018:ffffc90005077698 EFLAGS: 00010293
RAX: ffffffff8260d279 RBX: 0000000000000008 RCX: ffff888038ed1f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000082615101 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff940002be841 R12: ffff8880358f9084
R13: ffff8880358f9000 R14: ffffea00015f4200 R15: 0000000000000000
FS:  0000555581a07500(0000) GS:ffff888125d41000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000007a9bd2bd000 CR3: 000000003fe0a000 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+0x2c4/0xd80 mm/truncate.c:404
 ntfs_evict_inode+0x19/0x40 fs/ntfs3/inode.c:1794
 evict+0x624/0xb50 fs/inode.c:825
 dispose_list fs/inode.c:867 [inline]
 evict_inodes+0x7e3/0x870 fs/inode.c:921
 generic_shutdown_super+0xaa/0x2d0 fs/super.c:633
 kill_block_super+0x44/0x90 fs/super.c:1671
 ntfs3_kill_sb+0x44/0x1c0 fs/ntfs3/super.c:1915
 deactivate_locked_super+0xbc/0x130 fs/super.c:477
 cleanup_mnt+0x3d3/0x460 fs/namespace.c:1317
 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:70 [inline]
 exit_to_user_mode_loop+0x1fa/0x730 kernel/entry/common.c:101
 __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:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f298259f0d7
Code: a2 c7 05 1c 26 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:00007ffc83b52218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f298263330a RCX: 00007f298259f0d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc83b522d0
RBP: 00007ffc83b522d0 R08: 00007ffc83b532d0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc83b53360
R13: 00007f298263330a R14: 0000000000024ccb R15: 00007ffc83b533a0
 </TASK>

Crashes (1439):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/27 09:03 upstream 4235cb24ec1e 492bab15 .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 ifs_free
2026/06/27 04:37 upstream 51cb1aa1250c fb92f11c .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2 (corrupt fs)] [mounted in repro #3] [mounted in repro #4] ci2-upstream-fs WARNING in ifs_free
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
2026/08/03 05:58 upstream bd1dde877520 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/08/02 08:33 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/08/02 00:42 upstream 02dc699f83d0 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/08/01 12:44 upstream 0131b508c0e2 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/31 21:38 upstream 8ba098e6b6ff 7664cf44 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/30 11:15 upstream 11028ab62899 2377cd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/30 05:57 upstream fc46aed51f62 6ef5c1e2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/29 23:40 upstream fc02acf6ac0c 6ef5c1e2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/29 14:04 upstream fc02acf6ac0c 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/29 09:52 upstream fc02acf6ac0c 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/29 07:21 upstream fc02acf6ac0c 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/29 00:09 upstream 3b5f4b83c4ab edc8a875 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/28 13:09 upstream 62cc90241548 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/28 09:36 upstream 62cc90241548 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/28 05:41 upstream 62cc90241548 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/27 23:57 upstream f5098b6bae76 aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/27 20:01 upstream f5098b6bae76 aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/27 07:18 upstream 4235cb24ec1e 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/27 00:21 upstream 4235cb24ec1e 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/26 14:00 upstream 3dab139d4795 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/26 13:00 upstream 3dab139d4795 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/26 05:12 upstream 0ce37745d4bf 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/26 03:32 upstream 0ce37745d4bf 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/26 00:40 upstream 0ce37745d4bf 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/25 23:02 upstream 0ce37745d4bf 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/25 17:05 upstream 0ce37745d4bf 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/25 08:27 upstream e2a936998ab2 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/25 06:27 upstream e2a936998ab2 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/25 03:43 upstream e2a936998ab2 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/25 01:03 upstream 48a5a7ab8d6a dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/24 14:36 upstream 48a5a7ab8d6a dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/24 11:42 upstream d326f83e819c 544adce9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/24 10:21 upstream d326f83e819c 544adce9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/24 08:58 upstream d326f83e819c 544adce9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/24 07:48 upstream d326f83e819c 544adce9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/24 01:08 upstream d326f83e819c 544adce9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/23 22:00 upstream d326f83e819c 71a13572 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/23 19:41 upstream 4539944e5151 71a13572 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/23 17:12 upstream 4539944e5151 71a13572 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/23 14:41 upstream 4539944e5151 71a13572 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/23 08:55 upstream 4539944e5151 881ce5c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/23 08:33 upstream 4539944e5151 881ce5c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/23 05:04 upstream 4539944e5151 881ce5c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/23 03:49 upstream 4539944e5151 881ce5c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/23 02:40 upstream 4539944e5151 881ce5c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/22 22:25 upstream 4539944e5151 4a865b71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/07/18 16:41 upstream 1229e2e57a5c 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root 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
2026/06/22 23:22 linux-next 948efecf22e4 5a630be6 .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.