syzbot


WARNING in ifs_free

Status: upstream: reported C repro on 2026/01/15 08:12
Subsystems: iomap
[Documentation on labels]
Reported-by: syzbot+d3a62bea0e61f9d121da@syzkaller.appspotmail.com
First crash: 67d, last: 15h00m
Cause bisection: failed (error log, bisect log)
  
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:256 at ifs_free+0x35e/0x420 fs/iomap/buffered-io.c:255, CPU#1: syz-executor/5922
Modules linked in:
CPU: 1 UID: 0 PID: 5922 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ifs_free+0x35e/0x420 fs/iomap/buffered-io.c:255
Code: 41 5f 5d e9 34 59 c3 ff e8 df 2a 69 ff 90 0f 0b 90 e9 cd fe ff ff e8 d1 2a 69 ff 90 0f 0b 90 e9 0a ff ff ff e8 c3 2a 69 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: 0018:ffffc9000405f688 EFLAGS: 00010293
RAX: ffffffff825b294d RBX: 0000000000000008 RCX: ffff88802ca03c80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000825ba301 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000251149 R12: ffff8880437fe984
R13: ffff8880437fe900 R14: ffffea0001288a40 R15: 1ffffd4000251149
FS:  000055558e368500(0000) GS:ffff888126442000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558e383a28 CR3: 00000000356cc000 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:1861
 evict+0x61e/0xb10 fs/inode.c:846
 dispose_list fs/inode.c:888 [inline]
 evict_inodes+0x75a/0x7f0 fs/inode.c:942
 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:1889
 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+0xed/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd31563d897
Code: a2 c7 05 5c ee 24 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:00007ffff5600d28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fd3156d1ef0 RCX: 00007fd31563d897
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffff5600de0
RBP: 00007ffff5600de0 R08: 00007ffff5601de0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffff5601e70
R13: 00007fd3156d1ef0 R14: 000000000001b99e R15: 00007ffff5601eb0
 </TASK>

Crashes (228):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2026/03/18 19:37 upstream a989fde763f4 0199f9a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/18 17:36 upstream a989fde763f4 0199f9a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/18 15:28 upstream a989fde763f4 0199f9a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/18 07:26 upstream f0caa1d49cc0 c8810548 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/18 01:03 upstream f0caa1d49cc0 c8810548 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/17 08:43 upstream 2d1373e4246d c01bca74 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/17 06:55 upstream 2d1373e4246d 0737c18f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/17 00:57 upstream 2d1373e4246d 0737c18f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/16 17:05 upstream f338e7738378 64e21424 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/16 11:37 upstream f338e7738378 64e21424 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/16 05:17 upstream 4f3df2e5ea69 ee8d34d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/16 03:30 upstream 4f3df2e5ea69 ee8d34d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/15 22:29 upstream 4f3df2e5ea69 ee8d34d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/15 20:17 upstream 267594792a71 ee8d34d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/15 16:16 upstream 267594792a71 ee8d34d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/15 14:50 upstream 267594792a71 ee8d34d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/15 13:12 upstream 267594792a71 ee8d34d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/15 09:55 upstream 267594792a71 ee8d34d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/15 06:12 upstream 69237f8c1f69 ee8d34d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/14 16:22 upstream 1c9982b49613 ee8d34d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/14 13:16 upstream 1c9982b49613 ee8d34d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/14 11:47 upstream 1c9982b49613 ee8d34d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/14 09:13 upstream 1c9982b49613 ee8d34d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/13 23:20 upstream b36eb6e3f5d8 351cb5cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/13 16:45 upstream 0257f64bdac7 351cb5cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/13 10:56 upstream 0257f64bdac7 2f7f359d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/13 03:17 upstream 0257f64bdac7 2f7f359d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/13 01:31 upstream 0257f64bdac7 2f7f359d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/12 22:00 upstream 80234b5ab240 4efadf07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/12 14:16 upstream 80234b5ab240 4efadf07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/12 12:46 upstream 80234b5ab240 4efadf07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/12 08:47 upstream 80234b5ab240 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/12 04:51 upstream b29fb8829bff 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/11 22:21 upstream b29fb8829bff 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/11 21:12 upstream b29fb8829bff 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/11 18:25 upstream b29fb8829bff 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/10 22:44 upstream b4f0dd314b39 4683d576 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/10 19:54 upstream 1f318b96cc84 4683d576 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/10 17:56 upstream 1f318b96cc84 4683d576 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/10 16:41 upstream 1f318b96cc84 4683d576 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/10 11:32 upstream 1f318b96cc84 6972f302 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/10 03:30 upstream 1f318b96cc84 6972f302 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/09 23:32 upstream 1f318b96cc84 176bead5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/09 16:23 upstream 1f318b96cc84 176bead5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/09 15:05 upstream 1f318b96cc84 176bead5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/09 10:49 upstream 1f318b96cc84 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/02/26 17:47 upstream f4d0ec0aa20d ffa54287 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in ifs_free
2026/03/16 18:36 upstream f338e7738378 64e21424 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ifs_free
2026/03/09 22:29 upstream 1f318b96cc84 176bead5 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ifs_free
2026/02/08 15:27 linux-next 9845cf73f7db 4c131dc4 .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.