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kernel BUG in folio_set_bh (3)

Status: upstream: reported on 2026/05/14 10:36
Subsystems: karma
[Documentation on labels]
Reported-by: syzbot+32ec8b5bd050c78741c2@syzkaller.appspotmail.com
First crash: 5d09h, last: 2d01h
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
08e04d64-f2ad-44bd-ac3a-3866fb3665e4 assessment-security 💥 kernel BUG in folio_set_bh (3) 2026/05/14 10:28 2026/05/14 10:28 2026/05/14 10:29 6ccb967e465e832a7bfd7a116ad00d52a0923a5d failed to run ["git" "pull" "origin" "HEAD" "--depth=1" "--allow-unrelated-histories"]: exit status 128 From /app/workdir/repo/linux * branch HEAD -> FETCH_HEAD Updating files: 27% (25888/93697) Updating files: 28% (26236/93697) Updating files: 29% (27173/93697) Updating files: 30% (28110/93697) Updating files: 31% (29047/93697) Updating files: 32% (29984/93697) Updating files: 33% (30921/93697) Updating files: 34% (31857/93697) Updating files: 35% (32794/93697) Updating files: 36% (33731/93697) Updating files: 36% (33787/93697) Updating files: 37% (34668/93697) Updating files: 38% (35605/93697) Updating files: 39% (36542/93697) Updating files: 39% (37289/93697) Updating files: 39% (37351/93697) error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_10_1_0_sh_mask.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_10_3_0_default.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_10_3_0_offset.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_10_3_0_sh_mask.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_11_0_0_default.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_11_0_0_offset.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_11_0_0_sh_mask.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_11_0_3_offset.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_11_0_3_sh_mask.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_11_5_0_offset.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_11_5_0_sh_mask.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_12_0_0_offset.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_12_0_0_sh_mask.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_12_1_0_offset.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_12_1_0_sh_mask.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_0_default.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_0_offset.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_0_sh_mask.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_1_offset.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_1_sh_mask.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_2_1_offset.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_2_1_sh_mask.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_4_1_offset.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_4_1_sh_mask.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_4_2_offset.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_4_2_sh_mask.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_4_3_offset.h error: unable to write file drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_4_3_sh_mask.h fatal: cannot create directory at 'drivers/gpu/drm/amd/include/asic_reg/gca': No space left on device
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[PATCH] jfs: check sb_set_blocksize() return value in jfs_fill_super() 2 (2) 2026/05/15 13:21
Re: [syzbot] [karma?] kernel BUG in folio_set_bh (3) 1 (2) 2026/05/14 16:58
[syzbot] [karma?] kernel BUG in folio_set_bh (3) 0 (1) 2026/05/14 10:36
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in folio_set_bh (2) ntfs3 jfs -1 C 46 22d 122d 29/29 fixed on 2026/05/06 16:40
upstream kernel BUG in folio_set_bh ntfs3 -1 C done 202 129d 316d 29/29 fixed on 2026/01/07 12:29

Sample crash report:
loop0: detected capacity change from 0 to 2048
 loop0: p2 p3 < > p4 < p5 >
loop0: partition table partially beyond EOD, truncated
loop0: p3 start 4284289 is beyond EOD, truncated
jfs: block size(32768) > page size(4096) not supported by filesystem
------------[ cut here ]------------
kernel BUG at fs/buffer.c:1479!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5328 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:folio_set_bh+0x1dc/0x1e0 fs/buffer.c:1479
Code: 4c 89 e2 e8 b6 71 98 02 e9 42 ff ff ff e8 3c 80 6d ff 48 89 df 48 c7 c6 00 28 df 8b e8 6d bd cf fe 90 0f 0b e8 25 80 6d ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f
RSP: 0018:ffffc9000e2378f0 EFLAGS: 00010287
RAX: ffffffff8258511b RBX: ffffea0000391600 RCX: 0000000000100000
RDX: ffffc9000ec4a000 RSI: 0000000000001a43 RDI: 0000000000001a44
RBP: dffffc0000000000 R08: ffffea0000391607 R09: 1ffffd40000722c0
R10: dffffc0000000000 R11: fffff940000722c1 R12: 0000000000000003
R13: 0000000000008000 R14: ffff88804789f740 R15: 0000000000008000
FS:  00007fb7faee76c0(0000) GS:ffff88808c881000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f86657e22b0 CR3: 00000000128ba000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 folio_alloc_buffers+0x228/0x640 fs/buffer.c:849
 grow_dev_folio fs/buffer.c:979 [inline]
 grow_buffers fs/buffer.c:1020 [inline]
 __getblk_slow fs/buffer.c:1038 [inline]
 bdev_getblk+0x2cb/0x6e0 fs/buffer.c:1358
 __bread_gfp+0x89/0x3b0 fs/buffer.c:1412
 sb_bread include/linux/buffer_head.h:346 [inline]
 readSuper+0xdb/0x270 fs/jfs/jfs_mount.c:462
 chkSuper+0x5d/0xe00 fs/jfs/jfs_mount.c:299
 jfs_mount+0x4b/0x870 fs/jfs/jfs_mount.c:83
 jfs_fill_super+0x6bc/0xd80 fs/jfs/super.c:523
 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: 0033:0x7fb7f9f9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fb7faee6fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fb7fa215fa0 RCX: 00007fb7f9f9ce59
RDX: 0000200000000040 RSI: 0000200000000140 RDI: 0000200000000080
RBP: 00007fb7fa032d6f R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000c000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb7fa216038 R14: 00007fb7fa215fa0 R15: 00007ffff2e0f5c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:folio_set_bh+0x1dc/0x1e0 fs/buffer.c:1479
Code: 4c 89 e2 e8 b6 71 98 02 e9 42 ff ff ff e8 3c 80 6d ff 48 89 df 48 c7 c6 00 28 df 8b e8 6d bd cf fe 90 0f 0b e8 25 80 6d ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f
RSP: 0018:ffffc9000e2378f0 EFLAGS: 00010287
RAX: ffffffff8258511b RBX: ffffea0000391600 RCX: 0000000000100000
RDX: ffffc9000ec4a000 RSI: 0000000000001a43 RDI: 0000000000001a44
RBP: dffffc0000000000 R08: ffffea0000391607 R09: 1ffffd40000722c0
R10: dffffc0000000000 R11: fffff940000722c1 R12: 0000000000000003
R13: 0000000000008000 R14: ffff88804789f740 R15: 0000000000008000
FS:  00007fb7faee76c0(0000) GS:ffff88808c881000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8a5bc8038f CR3: 00000000128ba000 CR4: 0000000000352ef0

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/05/13 18:51 upstream 1d5dcaa3bd65 fec2a7ee .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in folio_set_bh
2026/05/13 14:24 upstream 1d5dcaa3bd65 fec2a7ee .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in folio_set_bh
2026/05/11 14:05 upstream 5d6919055dec 845acb1c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in folio_set_bh
2026/05/10 10:24 upstream 1bfaee9d3351 29233ece .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in folio_set_bh
* Struck through repros no longer work on HEAD.