general protection fault in detach_extent_buffer

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
8591650d-a36a-476f-a6a8-53e8bb068406	assessment-security		💥	general protection fault in detach_extent_buffer_folio (3)	2026/05/15 07:15	2026/05/15 07:15	2026/05/15 07:16	6ccb967e465e832a7bfd7a116ad00d52a0923a5d	failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/6bdb73b993f02e86796a668fa2d9485db4f74142" "-s" "bzImage" "compile_commands.json"]: exit status 2 Root cause: error: unable to open output file 'security/bpf/hooks.o': 'No such file or directory' /app/workdir/cache/src/34f094c99ea22d3ef2bffa00e4ab32cda3e788d9/security/apparmor/apparmorfs.c:177:28: warning: unused function 'get_loaddata_common_ref' [-Wunused-function] 177 \| static struct aa_loaddata get_loaddata_common_ref(struct aa_common_ref ref) \| ^~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. /app/workdir/cache/src/34f094c99ea22d3ef2bffa00e4ab32cda3e788d9/sound/usb/mixer_s1810c.c:633:5: warning: stack frame size (2360) exceeds limit (2048) in 'snd_sc1810_init_mixer' [-Wframe-larger-than] 633 \| int snd_sc1810_init_mixer(struct usb_mixer_interface *mixer) \| ^ 1 warning generated. fatal error: error in backend: IO failure on output stream: No space left on device PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script. Stack dump: 0. Program arguments: /usr/bin/clang --target=x86_64-linux-gnu -fintegrated-as -Werror=unknown-warning-option -Werror=ignored-optimization-argument -Werror=option-ignored -Werror=unused-command-line-argument -fmacro-prefix-map=/app/workdir/cache/src/34f094c99ea22d3ef2bffa00e4ab32cda3e788d9/= -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -mno-sse4a -fcf-protection=branch -fno-jump-tables -m64 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mstack-alignment=8 -mskip-rax-setup -march=x86-64 -mtune=generic -mno-red-zone -mcmodel=kernel -mstack-protector-guard-reg=gs -mstack-protector-guard-symbol=__ref_stack_chk_guard -Wno-sign-compare -fno-asynchronous-unwind-tables -mretpoline-external-thunk -mindirect-branch-cs-prefix -mfunction-return=thunk-extern -fpatchable-function-entry=16,16 -fno-delete-null-pointer-checks -O2 -fstack-protector-strong -fomit-frame-pointer -ftrivial-auto-var-init=zero -fno-stack-clash-protection -falign-functions=16 -fstrict-flex-arrays=3 -fms-extensions -fno-strict-overflow -fno-stack-check -fno-builtin-wcslen -Wall -Wextra -Wundef -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Werror=strict-prototypes -Wno-format-security -Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member -Wmissing-declarations -Wmissing-prototypes -Wframe-larger-than=2048 -Wno-gnu -Wno-microsoft-anon-tag -Wno-format-overflow-non-kprintf -Wno-format-truncation-non-kprintf -Wno-default-const-init-unsafe -Wno-type-limits -Wno-pointer-sign -Wcast-function-type -Wno-unterminated-string-initialization -Wimplicit-fallthrough -Werror=date-time -Werror=incompatible-pointer-types -Wenum-conversion -Wunused -Wno-unused-but-set-variable -Wno-unused-const-variable -Wno-format-overflow -Wno-override-init -Wno-pointer-to-enum-cast -Wno-tautological-constant-out-of-range-compare -Wno-unaligned-access -Wno-enum-compare-conditional -Wno-missing-field-initializers -Wno-shift-negative-value -Wno-enum-enum-conversion -Wno-sign-compare -Wno-unused-parameter -g -gdwarf-4 -fsanitize=kernel-address -mllvm -asan-mapping-offset=0xdffffc0000000000 -mllvm -asan-instrumentation-with-call-threshold=10000 -mllvm -asan-stack=1 -mllvm -asan-globals=1 -mllvm -asan-kernel-mem-intrinsic-prefix=1 -fsanitize=array-bounds -fsanitize=shift -fsanitize-coverage=trace-pc -fsanitize-coverage=trace-cmp -fdebug-info-for-profiling -mllvm -enable-fs-discriminator=true -mllvm -improved-fs-discriminator=true -fbasic-block-address-map -nostdinc -I/app/workdir/cache/src/34f094c99ea22d3ef2bffa00e4ab32cda3e788d9/arch/x86/include -I./arch/x86/include/generated -I/app/workdir/cache/src/34f094c99ea22d3ef2bffa00e4ab32cda3e788d9/include -I./include -I/app/workdir/cache/src/34f094c99ea22d3ef2bffa00e4ab32cda3e788d9/

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	general protection fault in detach_extent_buffer_folio (2) btrfs	2				1	157d	153d	0/29	auto-obsoleted due to no activity on 2026/03/21 10:36
upstream	general protection fault in detach_extent_buffer_folio btrfs	2				9	694d	711d	26/29	fixed on 2024/07/09 19:14

Kernel

Title

Rank 🛈

upstream

general protection fault in detach_extent_buffer_folio (2) btrfs

157d

153d

0/29

auto-obsoleted due to no activity on 2026/03/21 10:36

upstream

general protection fault in detach_extent_buffer_folio btrfs

694d

711d

26/29

fixed on 2024/07/09 19:14

loop0: detected capacity change from 0 to 32768 btrfs: Deprecated parameter 'usebackuproot' BTRFS warning: 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5322) BTRFS info (device loop0): first mount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf BTRFS info (device loop0): using crc32c checksum algorithm BTRFS info (device loop0): rebuilding free space tree BTRFS info (device loop0): enabling ssd optimizations BTRFS info (device loop0): using spread ssd allocation scheme BTRFS info (device loop0): disabling tree log BTRFS info (device loop0): enabling free space tree BTRFS info (device loop0): force clearing of disk cache BTRFS info (device loop0): trying to use backup root at mount time BTRFS info (device loop0): force zlib compression, level 3 Oops: general protection fault, probably for non-canonical address 0xdffffc000000002a: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000150-0x0000000000000157] CPU: 0 UID: 0 PID: 5322 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:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210 Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 c0 19 83 09 cc 66 66 66 66 66 66 2e RSP: 0018:ffffc9000e34e488 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffffffff8bb47e1e RCX: 0000000080000002 RDX: 0000000000000000 RSI: ffffffff8bb47e1e RDI: 000000000000002a RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1003e0b3a7 R12: 0000000000000000 R13: 0000000000000150 R14: 0000000000000150 R15: 0000000000000001 FS: 00007f4cdf5286c0(0000) GS:ffff88808ca49000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f76b1b05190 CR3: 0000000043d60000 CR4: 0000000000352ef0 Call Trace: <TASK> __kasan_check_byte+0x12/0x40 mm/kasan/common.c:573 kasan_check_byte include/linux/kasan.h:402 [inline] lock_acquire+0x79/0x2e0 kernel/locking/lockdep.c:5842 __raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:341 [inline] detach_extent_buffer_folio+0xda/0x910 fs/btrfs/extent_io.c:2940 btrfs_release_extent_buffer_folios+0x68/0x440 fs/btrfs/extent_io.c:3000 release_extent_buffer+0x16b/0x240 fs/btrfs/extent_io.c:3649 btrfs_force_cow_block+0x138c/0x2510 fs/btrfs/ctree.c:591 btrfs_cow_block+0x3c4/0xa90 fs/btrfs/ctree.c:694 btrfs_search_slot+0xd20/0x2d20 fs/btrfs/ctree.c:2116 lookup_inline_extent_backref+0x36f/0x1a70 fs/btrfs/extent-tree.c:848 lookup_extent_backref fs/btrfs/extent-tree.c:1100 [inline] __btrfs_free_extent+0x456/0x4570 fs/btrfs/extent-tree.c:3319 run_delayed_tree_ref fs/btrfs/extent-tree.c:1824 [inline] run_one_delayed_ref fs/btrfs/extent-tree.c:1851 [inline] btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:2058 [inline] __btrfs_run_delayed_refs+0x1881/0x4780 fs/btrfs/extent-tree.c:2133 btrfs_run_delayed_refs+0xe6/0x3b0 fs/btrfs/extent-tree.c:2245 btrfs_commit_transaction+0x29a/0x31a0 fs/btrfs/transaction.c:2254 btrfs_sync_file+0xdee/0x1260 fs/btrfs/file.c:1817 generic_write_sync include/linux/fs.h:2640 [inline] btrfs_do_write_iter+0x72e/0x880 fs/btrfs/file.c:1468 iter_file_splice_write+0x9a1/0x10f0 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x101/0x160 fs/splice.c:1159 splice_direct_to_actor+0x53a/0xc70 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x195/0x290 fs/splice.c:1228 do_sendfile+0x535/0x7d0 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1419 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4cde59c819 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:00007f4cdf527fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f4cde815fa0 RCX: 00007f4cde59c819 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005 RBP: 00007f4cde632c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000fffe82 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4cde816038 R14: 00007f4cde815fa0 R15: 00007ffe1a120088 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210 Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 c0 19 83 09 cc 66 66 66 66 66 66 2e RSP: 0018:ffffc9000e34e488 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffffffff8bb47e1e RCX: 0000000080000002 RDX: 0000000000000000 RSI: ffffffff8bb47e1e RDI: 000000000000002a RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1003e0b3a7 R12: 0000000000000000 R13: 0000000000000150 R14: 0000000000000150 R15: 0000000000000001 FS: 00007f4cdf5286c0(0000) GS:ffff88808ca49000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f76b1b05190 CR3: 0000000043d60000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: 0f 1f 40 00 nopl 0x0(%rax) 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 0f 1f 40 d6 nopl -0x2a(%rax) 18: 48 c1 ef 03 shr $0x3,%rdi 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df * 26: 0f b6 04 07 movzbl (%rdi,%rax,1),%eax <-- trapping instruction 2a: 3c 08 cmp $0x8,%al 2c: 0f 92 c0 setb %al 2f: e9 c0 19 83 09 jmp 0x98319f4 34: cc int3 35: 66 data16 36: 66 data16 37: 66 data16 38: 66 data16 39: 66 data16 3a: 66 data16 3b: 2e cs

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/04/13 05:09	upstream	028ef9c96e96	38c8e246	.config	console log	report				[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	general protection fault in detach_extent_buffer_folio
2026/04/08 11:28	upstream	3036cd0d3328	2c961e87	.config	console log	report				[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	general protection fault in detach_extent_buffer_folio

Crashes (2):

Assets (help?)