./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1891828891 <...> Warning: Permanently added '10.128.0.152' (ED25519) to the list of known hosts. execve("./syz-executor1891828891", ["./syz-executor1891828891"], 0x7ffe29091a60 /* 10 vars */) = 0 brk(NULL) = 0x555565a2a000 brk(0x555565a2ad00) = 0x555565a2ad00 arch_prctl(ARCH_SET_FS, 0x555565a2a380) = 0 set_tid_address(0x555565a2a650) = 5825 set_robust_list(0x555565a2a660, 24) = 0 rseq(0x555565a2aca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1891828891", 4096) = 28 getrandom("\xc4\x9d\x84\x29\xe2\xbc\x0b\x86", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555565a2ad00 brk(0x555565a4bd00) = 0x555565a4bd00 brk(0x555565a4c000) = 0x555565a4c000 mprotect(0x7f70441cc000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5826 attached [pid 5826] set_robust_list(0x555565a2a660, 24) = 0 [pid 5826] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5825] <... clone resumed>, child_tidptr=0x555565a2a650) = 5826 [pid 5826] <... prctl resumed>) = 0 [pid 5826] setpgid(0, 0) = 0 [pid 5826] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5826] write(3, "1000", 4) = 4 [pid 5826] close(3) = 0 [pid 5826] write(1, "executing program\n", 18executing program ) = 18 [pid 5826] memfd_create("syzkaller", 0) = 3 [pid 5826] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f703bc00000 [pid 5826] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216) = 16777216 [pid 5826] munmap(0x7f703bc00000, 138412032) = 0 [pid 5826] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5826] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5826] close(3) = 0 [pid 5826] close(4) = 0 [pid 5826] mkdir("./file2", 0777) = 0 [pid 5826] mount("/dev/loop0", "./file2", "jfs", MS_REC|MS_STRICTATIME, "") = 0 [pid 5826] openat(AT_FDCWD, "./file2", O_RDONLY|O_DIRECTORY) = 3 [pid 5826] chdir("./file2") = 0 [pid 5826] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 91.200888][ T5826] loop0: detected capacity change from 0 to 32768 [pid 5826] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT|O_DIRECT|O_NOATIME|O_CLOEXEC, 0777) = 4 [ 91.257313][ T30] audit: type=1800 audit(1748609802.916:2): pid=5826 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor189" name="file1" dev="loop0" ino=4 res=0 errno=0 [ 91.280382][ T5826] BUG at fs/jfs/inode.c:370 assert(length >= 0) [ 91.287177][ T5826] ------------[ cut here ]------------ [ 91.293091][ T5826] kernel BUG at fs/jfs/inode.c:370! [ 91.299070][ T5826] Oops: invalid opcode: 0000 [#1] SMP KASAN PTI [ 91.305349][ T5826] CPU: 1 UID: 0 PID: 5826 Comm: syz-executor189 Not tainted 6.15.0-syzkaller-08486-gf66bc387efbe #0 PREEMPT(full) [ 91.317425][ T5826] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 91.327480][ T5826] RIP: 0010:jfs_truncate_nolock+0x33b/0x340 [ 91.333401][ T5826] Code: e8 aa a9 25 08 e8 25 01 89 fe 48 c7 c7 80 6f c3 8b 48 c7 c6 a0 6b c3 8b ba 72 01 00 00 48 c7 c1 c0 6f c3 8b e8 76 4f f0 fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 [ 91.353010][ T5826] RSP: 0018:ffffc900044cf860 EFLAGS: 00010246 [ 91.359079][ T5826] RAX: 000000000000002d RBX: ffff88807755a910 RCX: 9b6df1d80429df00 [ 91.367046][ T5826] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 91.375027][ T5826] RBP: ffffc900044cf910 R08: ffffc900044cf547 R09: 1ffff92000899ea8 [ 91.382999][ T5826] R10: dffffc0000000000 R11: fffff52000899ea9 R12: fffffa000000000a [ 91.390982][ T5826] R13: dffffc0000000000 R14: ffff88807755a910 R15: 1ffff92000899f10 [ 91.398973][ T5826] FS: 0000555565a2a380(0000) GS:ffff888125d98000(0000) knlGS:0000000000000000 [ 91.407912][ T5826] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.414495][ T5826] CR2: 00007f70441d00f8 CR3: 0000000033d58000 CR4: 00000000003526f0 [ 91.422470][ T5826] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 91.430457][ T5826] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 91.438441][ T5826] Call Trace: [ 91.441749][ T5826] [ 91.444691][ T5826] ? down_write_nested+0x169/0x200 [ 91.449818][ T5826] ? __pfx_jfs_truncate_nolock+0x10/0x10 [ 91.455458][ T5826] ? __pfx_jfs_get_block+0x10/0x10 [ 91.460572][ T5826] jfs_write_failed+0x119/0x190 [ 91.465427][ T5826] jfs_direct_IO+0x1f4/0x220 [ 91.470022][ T5826] generic_file_direct_write+0x1d8/0x3e0 [ 91.475655][ T5826] ? file_update_time+0x416/0x490 [ 91.480707][ T5826] __generic_file_write_iter+0x11d/0x230 [ 91.486342][ T5826] ? generic_file_write_iter+0xfb/0x540 [ 91.491893][ T5826] generic_file_write_iter+0x10f/0x540 [ 91.497357][ T5826] ? lockdep_hardirqs_on+0x9c/0x150 [ 91.502575][ T5826] ? __pfx_generic_file_write_iter+0x10/0x10 [ 91.508570][ T5826] ? rcu_is_watching+0x15/0xb0 [ 91.513347][ T5826] ? trace_sched_exit_tp+0x38/0x120 [ 91.518564][ T5826] ? __lock_acquire+0xab9/0xd20 [ 91.523443][ T5826] ? rcu_read_lock_any_held+0xb3/0x120 [ 91.528927][ T5826] ? __pfx_rcu_read_lock_any_held+0x10/0x10 [ 91.534842][ T5826] vfs_write+0x548/0xa90 [ 91.539112][ T5826] ? __pfx_generic_file_write_iter+0x10/0x10 [ 91.545101][ T5826] ? __pfx_vfs_write+0x10/0x10 [ 91.549877][ T5826] ? _raw_spin_unlock_irq+0x23/0x50 [ 91.555098][ T5826] ? _raw_spin_unlock_irq+0x2e/0x50 [ 91.560312][ T5826] ksys_write+0x145/0x250 [ 91.564654][ T5826] ? __pfx_ksys_write+0x10/0x10 [ 91.569526][ T5826] do_syscall_64+0xfa/0x3b0 [ 91.574034][ T5826] ? lockdep_hardirqs_on+0x9c/0x150 [ 91.579240][ T5826] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 91.585337][ T5826] ? clear_bhb_loop+0x60/0xb0 [ 91.590038][ T5826] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 91.595945][ T5826] RIP: 0033:0x7f7044153b99 [ 91.600385][ T5826] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 b8 ff ff ff f7 d8 64 89 01 48 [ 91.619999][ T5826] RSP: 002b:00007ffcf55123e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 91.628421][ T5826] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7044153b99 [ 91.636394][ T5826] RDX: 00000000000000a0 RSI: 0000200000000340 RDI: 0000000000000004 [ 91.644372][ T5826] RBP: 00007f70441cc5f0 R08: 0000000000000000 R09: 0000555565a2b4c0 [ 91.652346][ T5826] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf5512410 [ 91.660314][ T5826] R13: 00007ffcf5512638 R14: 431bde82d7b634db R15: 00007f704419c03b [ 91.668291][ T5826] [ 91.671310][ T5826] Modules linked in: [ 91.675486][ T5826] ---[ end trace 0000000000000000 ]--- [ 91.681454][ T5826] RIP: 0010:jfs_truncate_nolock+0x33b/0x340 [ 91.687436][ T5826] Code: e8 aa a9 25 08 e8 25 01 89 fe 48 c7 c7 80 6f c3 8b 48 c7 c6 a0 6b c3 8b ba 72 01 00 00 48 c7 c1 c0 6f c3 8b e8 76 4f f0 fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 [ 91.707202][ T5826] RSP: 0018:ffffc900044cf860 EFLAGS: 00010246 [ 91.713334][ T5826] RAX: 000000000000002d RBX: ffff88807755a910 RCX: 9b6df1d80429df00 [ 91.721359][ T5826] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 91.729375][ T5826] RBP: ffffc900044cf910 R08: ffffc900044cf547 R09: 1ffff92000899ea8 [ 91.737434][ T5826] R10: dffffc0000000000 R11: fffff52000899ea9 R12: fffffa000000000a [ 91.745448][ T5826] R13: dffffc0000000000 R14: ffff88807755a910 R15: 1ffff92000899f10 [ 91.753461][ T5826] FS: 0000555565a2a380(0000) GS:ffff888125c98000(0000) knlGS:0000000000000000 [ 91.762435][ T5826] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.769014][ T5826] CR2: 00007fff00fbacec CR3: 0000000033d58000 CR4: 00000000003526f0 [ 91.777032][ T5826] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 91.785044][ T5826] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 91.793086][ T5826] Kernel panic - not syncing: Fatal exception [ 91.799478][ T5826] Kernel Offset: disabled [ 91.803799][ T5826] Rebooting in 86400 seconds..