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: 84d, last: 54m
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 (420):
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
2026/04/06 04:13 upstream 1791c390149f 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/06 01:20 upstream 1791c390149f 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/05 23:19 upstream 1791c390149f 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/05 20:31 upstream 1791c390149f 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/05 18:37 upstream 1791c390149f 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/05 11:20 upstream 3aae9383f42f 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/05 09:37 upstream 3aae9383f42f 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/05 04:40 upstream 3aae9383f42f 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/05 03:01 upstream 7ca6d1cfec80 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/05 01:15 upstream 7ca6d1cfec80 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/05 00:08 upstream 7ca6d1cfec80 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/04 22:52 upstream 7ca6d1cfec80 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/04 22:52 upstream 7ca6d1cfec80 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/04 21:26 upstream 7ca6d1cfec80 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/04 20:23 upstream 7ca6d1cfec80 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/04 19:03 upstream 7ca6d1cfec80 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/04 17:19 upstream 7ca6d1cfec80 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/04 14:35 upstream 631919fb12fe 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/04 10:37 upstream 631919fb12fe 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/04 00:28 upstream d8a9a4b11a13 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/03 23:23 upstream d8a9a4b11a13 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/03 14:12 upstream d8a9a4b11a13 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/03 14:10 upstream d8a9a4b11a13 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/02 12:40 upstream 9147566d8016 91bc79b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/02 09:23 upstream 9147566d8016 0cb124d5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/02 07:09 upstream 9147566d8016 0cb124d5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/01 14:45 upstream 9147566d8016 9a1f7828 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/01 13:18 upstream 9147566d8016 9a1f7828 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/01 12:15 upstream 9147566d8016 9a1f7828 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/01 05:07 upstream dbf00d8d23b4 fb8b2c26 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/04/01 01:14 upstream dbf00d8d23b4 fb8b2c26 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/31 18:02 upstream d0c3bcd5b897 aeea1c72 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/31 15:05 upstream d0c3bcd5b897 aeea1c72 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/31 12:22 upstream d0c3bcd5b897 aeea1c72 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/31 05:35 upstream d0c3bcd5b897 d0af506e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/31 03:38 upstream d0c3bcd5b897 d0af506e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/31 02:09 upstream d0c3bcd5b897 d0af506e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/30 23:01 upstream d0c3bcd5b897 d0af506e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/30 18:42 upstream 7aaa8047eafd dcaebc52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/30 17:34 upstream 7aaa8047eafd dcaebc52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/30 15:57 upstream 7aaa8047eafd dcaebc52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/30 13:12 upstream 7aaa8047eafd dcaebc52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/30 12:56 upstream 7aaa8047eafd dcaebc52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ifs_free
2026/03/30 09:42 upstream 7aaa8047eafd dcaebc52 .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
2026/04/04 07:00 upstream 631919fb12fe 4440e7c2 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ifs_free
2026/04/01 04:05 upstream dbf00d8d23b4 fb8b2c26 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ifs_free
2026/03/28 22:10 upstream be762d8b6dd7 b5ceaad2 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ifs_free
2026/03/28 07:03 upstream 7df48e363130 f9ef2ec1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ifs_free
2026/04/03 20:32 linux-next cc13002a9f98 4440e7c2 .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.