Hello, syzbot found the following issue on: HEAD commit: c664e16bb1ba Merge tag 'docs-6.8-fixes2' of git://git.lwn... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1576f862180000 kernel config: https://syzkaller.appspot.com/x/.config?x=25b2f1c52b0610fa dashboard link: https://syzkaller.appspot.com/bug?extid=776b5fc6c99745aa7860 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-c664e16b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/81393e4e8960/vmlinux-c664e16b.xz kernel image: https://storage.googleapis.com/syzbot-assets/3048b480feed/bzImage-c664e16b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+776b5fc6c99745aa7860@xxxxxxxxxxxxxxxxxxxxxxxxx bread failed! read_mapping_page failed! bread failed! 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: 2 PID: 30987 Comm: syz-executor.0 Not tainted 6.8.0-rc4-syzkaller-00005-gc664e16bb1ba #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:txEnd+0x583/0x5a0 fs/jfs/jfs_txnmgr.c:528 Code: e9 59 fb ff ff e8 dd 70 88 fe 48 c7 c1 00 ee 29 8b ba 10 02 00 00 48 c7 c6 80 e8 29 8b 48 c7 c7 c0 e8 29 8b e8 8e 83 6a fe 90 <0f> 0b 48 89 ef e8 f3 00 e3 fe e9 40 fd ff ff e8 b9 00 e3 fe e9 2e RSP: 0018:ffffc9000ff0fa50 EFLAGS: 00010286 RAX: 0000000000000036 RBX: ffffc900020c7600 RCX: ffffc900065fa000 RDX: 0000000000000000 RSI: ffffffff816e9616 RDI: 0000000000000005 RBP: 0000000000000060 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000006 R12: ffff888021b79800 R13: 00000000000000c0 R14: ffffffff8db27f60 R15: ffffc900020c7602 FS: 0000000000000000(0000) GS:ffff88802c400000(0063) knlGS:00000000f5e30b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020ca3000 CR3: 00000000007a0000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> jfs_truncate_nolock+0x1f5/0x2f0 fs/jfs/inode.c:391 jfs_truncate+0xeb/0x170 fs/jfs/inode.c:412 jfs_write_failed fs/jfs/inode.c:289 [inline] jfs_write_begin+0xbe/0xe0 fs/jfs/inode.c:301 generic_perform_write+0x273/0x620 mm/filemap.c:3930 __generic_file_write_iter+0x1fd/0x240 mm/filemap.c:4025 generic_file_write_iter+0xe7/0x350 mm/filemap.c:4051 call_write_iter include/linux/fs.h:2085 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x6de/0x1110 fs/read_write.c:590 ksys_write+0x12f/0x260 fs/read_write.c:643 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7c/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x33/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7c/0x86 RIP: 0023:0xf7257579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5e305ac EFLAGS: 00000292 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 0000000020000100 RDX: 00000000fffffd9d RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </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 dd 70 88 fe 48 c7 c1 00 ee 29 8b ba 10 02 00 00 48 c7 c6 80 e8 29 8b 48 c7 c7 c0 e8 29 8b e8 8e 83 6a fe 90 <0f> 0b 48 89 ef e8 f3 00 e3 fe e9 40 fd ff ff e8 b9 00 e3 fe e9 2e RSP: 0018:ffffc9000ff0fa50 EFLAGS: 00010286 RAX: 0000000000000036 RBX: ffffc900020c7600 RCX: ffffc900065fa000 RDX: 0000000000000000 RSI: ffffffff816e9616 RDI: 0000000000000005 RBP: 0000000000000060 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000006 R12: ffff888021b79800 R13: 00000000000000c0 R14: ffffffff8db27f60 R15: ffffc900020c7602 FS: 0000000000000000(0000) GS:ffff88802c400000(0063) knlGS:00000000f5e30b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020ca3000 CR3: 00000000007a0000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
