kernel BUG in f2fs_do_truncate

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
78882671-30d3-4867-bc5b-07080ae27bd7	assessment-security	DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ✅ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌	✅	kernel BUG in f2fs_do_truncate_blocks (2)	2026/05/07 19:41	2026/05/07 19:41	2026/05/07 20:25	06a6ee865c1ddbbe04beddc5a2bf68cc0e8aa03c
64b406b5-9145-41de-90f0-79c972bf351f	assessment-security		💥	kernel BUG in f2fs_do_truncate_blocks (2)	2026/05/07 04:58	2026/05/07 05:07	2026/05/07 07:04	f250db59430dfb0102692e53ab92e84e82178c3e	Error 503, Message: This model is currently experiencing high demand. Spikes in demand are usually temporary. Please try again later., Status: UNAVAILABLE, Details: []

Title	Replies (including bot)	Last reply
[PATCH] f2fs: fix to do sanity check on f2fs_get_node_folio_ra()	2 (2)	2026/06/15 15:30
[syzbot] Monthly f2fs report (May 2026)	0 (1)	2026/05/10 04:32
[syzbot] [f2fs?] kernel BUG in f2fs_do_truncate_blocks (2)	0 (1)	2026/05/05 18:27

Title

Replies (including bot)

Last reply

[PATCH] f2fs: fix to do sanity check on f2fs_get_node_folio_ra()

2 (2)

2026/06/15 15:30

[syzbot] Monthly f2fs report (May 2026)

0 (1)

2026/05/10 04:32

[syzbot] [f2fs?] kernel BUG in f2fs_do_truncate_blocks (2)

0 (1)

2026/05/05 18:27

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	kernel BUG in f2fs_do_truncate_blocks f2fs	-1				3	239d	294d	0/29	auto-obsoleted due to no activity on 2026/02/02 16:58

Rank 🛈

upstream

kernel BUG in f2fs_do_truncate_blocks f2fs

-1

239d

294d

0/29

auto-obsoleted due to no activity on 2026/02/02 16:58

loop0: detected capacity change from 0 to 131072 F2FS-fs (loop0): QUOTA feature is enabled, so ignore qf_name F2FS-fs (loop0): build fault injection rate: 7 F2FS-fs (loop0): build fault injection type: 0x40004 F2FS-fs (loop0): invalid crc value F2FS-fs (loop0): inject page alloc in f2fs_grab_cache_folio of read_compacted_summaries fs/f2fs/segment.c:4301 [inline] F2FS-fs (loop0): inject page alloc in f2fs_grab_cache_folio of restore_curseg_summaries fs/f2fs/segment.c:4445 [inline] F2FS-fs (loop0): inject page alloc in f2fs_grab_cache_folio of build_curseg+0x105c/0x30c0 fs/f2fs/segment.c:4983 F2FS-fs (loop0): inject page alloc in f2fs_grab_cache_folio of restore_curseg_summaries fs/f2fs/segment.c:4452 [inline] F2FS-fs (loop0): inject page alloc in f2fs_grab_cache_folio of build_curseg+0x18ea/0x30c0 fs/f2fs/segment.c:4983 F2FS-fs (loop0): inject page alloc in f2fs_grab_cache_folio of build_sit_entries+0x26c/0x1f10 fs/f2fs/segment.c:5000 F2FS-fs (loop0): inject invalid blkaddr in f2fs_is_valid_blkaddr of f2fs_ra_meta_pages+0x21c/0xd60 fs/f2fs/checkpoint.c:472 F2FS-fs (loop0): inject page alloc in f2fs_grab_cache_folio of f2fs_get_meta_folio_retry+0x27/0x80 fs/f2fs/checkpoint.c:318 F2FS-fs (loop0): inject page alloc in f2fs_grab_cache_folio of f2fs_get_meta_folio_retry+0x27/0x80 fs/f2fs/checkpoint.c:318 ------------[ cut here ]------------ kernel BUG at fs/f2fs/file.c:845! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5336 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:f2fs_do_truncate_blocks+0x1115/0x1140 fs/f2fs/file.c:845 Code: fc fc 90 0f 0b e8 8b 9d 9a fd 90 0f 0b e8 83 9d 9a fd 48 89 df 48 c7 c6 60 d1 1a 8c e8 54 f1 fc fc 90 0f 0b e8 6c 9d 9a fd 90 <0f> 0b e8 64 9d 9a fd 90 0f 0b 90 e9 93 fd ff ff e8 56 9d 9a fd 90 RSP: 0018:ffffc9000e4474c0 EFLAGS: 00010283 RAX: ffffffff842b1d34 RBX: 0000000000000003 RCX: 0000000000100000 RDX: ffffc9000f03a000 RSI: 0000000000035503 RDI: 0000000000035504 RBP: ffffc9000e447608 R08: ffff8880123b0000 R09: 0000000000000002 R10: 00000000fffffffe R11: 0000000000000002 R12: 0000000000000001 R13: 0000000000000000 R14: 1ffff92001c88ea0 R15: 00000000ffff039c FS: 00007f7e02ee36c0(0000) GS:ffff88808c887000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff0305c4000 CR3: 0000000012d4c000 CR4: 0000000000352ef0 Call Trace: <TASK> f2fs_truncate_blocks+0x10a/0x300 fs/f2fs/file.c:882 f2fs_truncate+0x471/0x7c0 fs/f2fs/file.c:940 f2fs_evict_inode+0xa3f/0x1ac0 fs/f2fs/inode.c:907 evict+0x61e/0xb10 fs/inode.c:841 f2fs_fill_super+0x5f43/0x78f0 fs/f2fs/super.c:5224 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3758 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3834 do_mount fs/namespace.c:4167 [inline] __do_sys_mount fs/namespace.c:4383 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4360 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: 0033:0x7f7e01f9e04a Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f7e02ee2e18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f7e02ee2ea0 RCX: 00007f7e01f9e04a RDX: 0000200000000080 RSI: 00002000000105c0 RDI: 00007f7e02ee2e60 RBP: 0000200000000080 R08: 00007f7e02ee2ea0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000105c0 R13: 00007f7e02ee2e60 R14: 0000000000010589 R15: 0000200000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:f2fs_do_truncate_blocks+0x1115/0x1140 fs/f2fs/file.c:845 Code: fc fc 90 0f 0b e8 8b 9d 9a fd 90 0f 0b e8 83 9d 9a fd 48 89 df 48 c7 c6 60 d1 1a 8c e8 54 f1 fc fc 90 0f 0b e8 6c 9d 9a fd 90 <0f> 0b e8 64 9d 9a fd 90 0f 0b 90 e9 93 fd ff ff e8 56 9d 9a fd 90 RSP: 0018:ffffc9000e4474c0 EFLAGS: 00010283 RAX: ffffffff842b1d34 RBX: 0000000000000003 RCX: 0000000000100000 RDX: ffffc9000f03a000 RSI: 0000000000035503 RDI: 0000000000035504 RBP: ffffc9000e447608 R08: ffff8880123b0000 R09: 0000000000000002 R10: 00000000fffffffe R11: 0000000000000002 R12: 0000000000000001 R13: 0000000000000000 R14: 1ffff92001c88ea0 R15: 00000000ffff039c FS: 00007f7e02ee36c0(0000) GS:ffff88808c887000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055e028509c38 CR3: 0000000012d4c000 CR4: 0000000000352ef0

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/05/01 18:23	upstream	26fd6bff2c05	753c55b9	.config	console log	report				[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	kernel BUG in f2fs_do_truncate_blocks

Crashes (1):

Assets (help?)