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kernel BUG in txEnd (2)

Status: upstream: reported C repro on 2024/02/13 15:23
Subsystems: jfs
[Documentation on labels]
Reported-by: syzbot+776b5fc6c99745aa7860@syzkaller.appspotmail.com
First crash: 830d, last: 15h38m
Cause bisection: failed (error log, bisect log)
  
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
dc9dca27-2332-4b57-b4cc-2c9db2a69ef4 assessment-security 💥 kernel BUG in txEnd (2) 2026/05/18 02:03 2026/05/18 02:03 2026/05/18 02:25 de5aae85e5f28e2fa1c7deefcc24fe286abe5140 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/622e149c61dcdf625a056b4ed0ea1026ad9dd10e" "-s" "bzImage" "compile_commands.json"]: exit status 2 Root cause: drivers/nvme/target/fc.c:151:2: warning: 'counted_by' should not be applied to an array with element of unknown size because 'struct nvmet_fc_fcp_iod' is a struct type with a flexible array member. This will be an error in a future compiler version [-Wbounds-safety-counted-by-elt-type-unknown-size] include/linux/thread_info.h:244:4: error: call to '__bad_copy_from' declared with 'error' attribute: copy source size is too small * * Restart config... * * * General architecture-dependent options * Kprobes (KPROBES) [N/y/?] n Optimize very unlikely/likely branches (JUMP_LABEL) [Y/n/?] y Static key selftest (STATIC_KEYS_SELFTEST) [N/y/?] n Static call selftest (STATIC_CALL_SELFTEST) [N/y/?] n Enable seccomp to safely execute untrusted bytecode (SECCOMP) [Y/n/?] y Show seccomp filter cache status in /proc/pid/seccomp_cache (SECCOMP_CACHE_DEBUG) [N/y/?] n Link Time Optimization (LTO) > 1. None (LTO_NONE) choice[1]: 1 Use Clang's Control Flow Integrity (CFI) (CFI_CLANG) [N/y/?] (NEW) Error in reading or end of file. Number of bits to use for ASLR of mmap base address (ARCH_MMAP_RND_BITS) [28] 28 Number of bits to use for ASLR of mmap base address for compatible applications (ARCH_MMAP_RND_COMPAT_BITS) [8] 8 MMU page size > 1. 4KiB pages (PAGE_SIZE_4KB) choice[1]: 1 Provide system calls for 32-bit time_t (COMPAT_32BIT_TIME) [Y/n/?] y Use a virtually-mapped stack (VMAP_STACK) [Y/n/?] y Support for randomizing kernel stack offset on syscall entry (RANDOMIZE_KSTACK_OFFSET) [Y/n/?] y Default state of kernel stack offset randomization (RANDOMIZE_KSTACK_OFFSET_DEFAULT) [N/y/?] n Locking event counts collection (LOCK_EVENT_COUNTS) [N/y/?] n * * Kernel hardening options * Randomize layout of sensitive kernel structures > 1. Disable structure layout randomization (RANDSTRUCT_NONE) 2. Fully randomize structure layout (RANDSTRUCT_FULL) (NEW) choice[1-2?]: Error in reading or end of file. * * Compile-time checks and compiler options * Debug information 1. Disable debug information (DEBUG_INFO_NONE) 2. Rely on the toolchain's implicit default DWARF version (DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT) > 3. Generate DWARF Version 4 debuginfo (DEBUG_INFO_DWARF4) 4. Generate DWARF Version 5 debuginfo (DEBUG_INFO_DWARF5) choice[1-4?]: 3 Reduce debugging information (DEBUG_INFO_REDUCED) [N/y/?] n Compressed Debug information > 1. Don't compress debug information (DEBUG_INFO_COMPRESSED_NONE) 2. Compress debugging information with zlib (DEBUG_INFO_COMPRESSED_ZLIB) 3. Compress debugging information with zstd (DEBUG_INFO_COMPRESSED_ZSTD) (NEW) choice[1-3?]: Error in reading or end of file. Produce split debuginfo in .dwo files (DEBUG_INFO_SPLIT) [N/y/?] n Generate BTF typeinfo (DEBUG_INFO_BTF) [N/y/?] n Provide GDB scripts for kernel debugging (GDB_SCRIPTS) [N/y/?] n Warn for stack frames larger than (FRAME_WARN) [2048] 2048 Strip assembler-generated symbols during link (STRIP_ASM_SYMS) [N/y/?] n Install uapi headers to usr/include (HEADERS_INSTALL) [N/y/?] n Make section mismatch errors non-fatal (SECTION_MISMATCH_WARN_ONLY) [Y/n/?] y Force all function address 64B aligned (DEBUG_FORCE_FUNCTION_ALIGN_64B) [N/y/?] n Generate vmlinux.map file when linking (VMLINUX_MAP) [N/y/?] n Force weak per-cpu definitions (DEBUG_FORCE_WEAK_PER_CPU) [N/y/?] n In file included from /app/workdir/cache/src/c7f43ad38f4624a916ae6d6e817e3a508ce283e0/arch/x86/kernel/asm-offsets.c:14: In file included from /app/workdir/cache/src/c7f43ad38f4624a916ae6d6e817e3a508ce283e0/include/linux/suspend.h:5: In file included from /app/workdir/cache/src/c7f43ad38f4624a916ae6d6e817e3a508ce283e0/include/linux/swap.h:9: In file included from /app/workdir/cache/src/c7f43ad38f4624a916ae6d6e817e3a508ce283e0/include/linux/memcontrol.h:20: In file included from /app/workdir/cache/src/c7f43ad38f46
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[syzbot] [jfs?] kernel BUG in txEnd (2) 0 (2) 2024/03/29 07:57
Re: [syzbot] [jfs?] kernel BUG in txEnd (2) 1 (1) 2024/02/20 03:00
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in txEnd jfs -1 C inconclusive done 6 854d 1068d 25/29 fixed on 2024/01/30 15:47
linux-6.1 kernel BUG in txEnd origin:upstream -1 C error 14 61d 980d 0/3 upstream: reported C repro on 2023/09/16 10:44
linux-5.15 kernel BUG in txEnd origin:upstream -1 C error 7 20d 1021d 0/3 upstream: reported C repro on 2023/08/06 15:29
linux-6.6 kernel BUG in txEnd -1 7 10d 206d 0/2 upstream: reported on 2025/10/29 03:17
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2025/08/06 17:30 46m retest repro upstream report log
2025/07/17 00:51 30m retest repro upstream report log
2025/03/28 14:04 25m retest repro upstream report log
2025/03/28 10:40 13m retest repro upstream error
2024/11/20 13:20 2h36m retest repro upstream report log
2024/11/02 04:25 12m retest repro upstream report log
2024/08/18 09:14 18m retest repro upstream report log
2024/07/03 04:23 20m retest repro upstream report log
2024/05/30 06:34 17m retest repro upstream report log
2024/04/19 08:04 21m retest repro upstream error
▶ ▼ Fix bisection attempts (2)
Created Duration User Patch Repo Result
2025/05/22 22:35 2h56m bisect fix upstream OK (0) job log log
2024/08/04 06:01 2h41m bisect fix upstream OK (0) job log log

Sample crash report:
jfs_dirty_inode called on read-only volume
Is remount racy?
BUG at fs/jfs/jfs_txnmgr.c:528 assert(tblk->next == 0)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:528!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 PID: 5253 Comm: syz-executor989 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:txEnd+0x583/0x5a0 fs/jfs/jfs_txnmgr.c:528
Code: e9 59 fb ff ff e8 bd 24 84 fe 48 c7 c1 40 a4 4a 8b ba 10 02 00 00 48 c7 c6 c0 9e 4a 8b 48 c7 c7 00 9f 4a 8b e8 5e f5 64 fe 90 <0f> 0b 48 89 ef e8 03 07 df fe e9 40 fd ff ff e8 c9 06 df fe e9 2e
RSP: 0018:ffffc90008cc7ab8 EFLAGS: 00010282
RAX: 0000000000000036 RBX: ffffc900025d1110 RCX: ffffffff816f2339
RDX: 0000000000000000 RSI: ffffffff816fab26 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: ffffffff8dd43da0 R15: ffffc900025d1112
FS:  00007fc48c2826c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc484d0b000 CR3: 000000001511e000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 add_missing_indices fs/jfs/jfs_dtree.c:2663 [inline]
 jfs_readdir+0x2952/0x4310 fs/jfs/jfs_dtree.c:3009
 wrap_directory_iterator+0xa8/0xe0 fs/readdir.c:67
 iterate_dir+0x295/0x9e0 fs/readdir.c:110
 __do_sys_getdents fs/readdir.c:326 [inline]
 __se_sys_getdents fs/readdir.c:311 [inline]
 __x64_sys_getdents+0x14f/0x2d0 fs/readdir.c:311
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd5/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fc48c2f6c39
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 1d 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc48c282168 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00007fc48c37e6d8 RCX: 00007fc48c2f6c39
RDX: 0000000000001000 RSI: 0000000020006600 RDI: 0000000000000005
RBP: 00007fc48c37e6d0 R08: 00007fc48c2826c0 R09: 0000000000000000
R10: 00007fc48c2826c0 R11: 0000000000000246 R12: 00007fc48c37e6dc
R13: 000000000000006e R14: 00007ffdf1f02700 R15: 00007ffdf1f027e8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txEnd+0x583/0x5a0 fs/jfs/jfs_txnmgr.c:528
Code: e9 59 fb ff ff e8 bd 24 84 fe 48 c7 c1 40 a4 4a 8b ba 10 02 00 00 48 c7 c6 c0 9e 4a 8b 48 c7 c7 00 9f 4a 8b e8 5e f5 64 fe 90 <0f> 0b 48 89 ef e8 03 07 df fe e9 40 fd ff ff e8 c9 06 df fe e9 2e
RSP: 0018:ffffc90008cc7ab8 EFLAGS: 00010282
RAX: 0000000000000036 RBX: ffffc900025d1110 RCX: ffffffff816f2339
RDX: 0000000000000000 RSI: ffffffff816fab26 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: ffffffff8dd43da0 R15: ffffc900025d1112
FS:  00007fc48c2826c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc484d0b000 CR3: 000000001511e000 CR4: 0000000000350ef0

Crashes (314):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/29 07:56 upstream fe46a7dd189e 120789fd .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-badwrites-root kernel BUG in txEnd
2024/05/16 06:31 upstream 33e02dc69afb ef5d53ed .config console log report syz C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-qemu-upstream kernel BUG in txEnd
2026/05/21 18:50 upstream 8bc67e4db64a e195359d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in txEnd
2026/05/03 15:08 upstream 66edb901bf87 a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root kernel BUG in txEnd
2026/04/17 10:34 upstream 3cd8b194bf34 de0a551d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txEnd
2026/04/09 22:42 upstream 8b02520ec5f7 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txEnd
2026/04/07 15:25 upstream bfe62a454542 628666c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txEnd
2026/04/05 15:00 upstream 3aae9383f42f 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txEnd
2026/04/03 16:49 upstream d8a9a4b11a13 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txEnd
2026/04/01 15:58 upstream 9147566d8016 9a1f7828 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txEnd
2026/03/24 04:37 upstream c369299895a5 baf8bf12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txEnd
2026/03/24 00:59 upstream c369299895a5 baf8bf12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in txEnd
2026/03/23 07:16 upstream 8d8bd2a5aa98 5b92003d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root kernel BUG in txEnd
2026/03/23 06:06 upstream 8d8bd2a5aa98 5b92003d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in txEnd
2024/04/30 03:46 upstream b947cc5bf6d7 27e33c58 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root kernel BUG in txEnd
2026/05/23 07:37 upstream cca95436be15 c69befb3 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/23 06:18 upstream cca95436be15 c69befb3 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/22 15:19 upstream 6779b50faa56 e16cf9f3 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/22 06:41 upstream 758c807bb943 70ae9b03 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/21 11:32 upstream 8bc67e4db64a 747d777d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/21 05:11 upstream df685633c3db 41b8c833 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/21 02:21 upstream df685633c3db 41b8c833 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/20 08:49 upstream 27fa82620cba 6cd1a940 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/15 13:01 upstream 70eda68668d1 9cd3beaa .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/15 11:21 upstream 70eda68668d1 9cd3beaa .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/15 04:48 upstream 66182ca873a4 6ccb967e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/14 19:19 upstream 66182ca873a4 6ccb967e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/14 14:34 upstream e1914add2799 6ccb967e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/14 10:19 upstream e1914add2799 6ccb967e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/13 20:16 upstream 1d5dcaa3bd65 fec2a7ee .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/13 16:41 upstream 1d5dcaa3bd65 fec2a7ee .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/12 06:19 upstream 50897c955902 d168f260 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/09 14:13 upstream 70390501d194 29233ece .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/09 07:55 upstream cbf457c584b5 29233ece .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/05/03 01:45 upstream 66edb901bf87 a0d91488 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/04/29 14:01 upstream dca922e019dd 7ca9e4d8 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/04/23 19:22 upstream 2e6803928193 629ff21a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/04/21 17:36 upstream b4e07588e743 9765efe0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/04/20 11:37 upstream bea8d77e45a8 303e2802 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/04/19 11:59 upstream faeab166167f 303e2802 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/04/18 10:11 upstream 8541d8f725c6 5be7a9de .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/04/14 09:54 upstream 26ff969926a0 1a086e7c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/04/10 04:31 upstream a55f7f5f29b3 38c8e246 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/03/18 02:34 upstream f0caa1d49cc0 c8810548 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2026/03/17 02:27 upstream 2d1373e4246d 0737c18f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in txEnd
2024/02/13 14:38 upstream c664e16bb1ba e66542d7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel BUG in txEnd
2026/04/02 03:31 linux-next bd0f139e5fc1 0cb124d5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in txEnd
2026/03/31 16:49 linux-next 36ece9697e89 aeea1c72 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in txEnd
2026/03/29 19:08 linux-next 3b058d1aeeef 356bdfc9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in txEnd
2026/03/29 01:27 linux-next 3b058d1aeeef 356bdfc9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in txEnd
2026/03/28 11:24 linux-next 3b058d1aeeef 356bdfc9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in txEnd
2026/03/27 21:29 linux-next e77a5a5cfe43 74a13a23 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in txEnd
2026/03/27 18:59 linux-next e77a5a5cfe43 74a13a23 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in txEnd
2025/12/21 16:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f0b4cce4481 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in txEnd
* Struck through repros no longer work on HEAD.