./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1088430077 <...> Warning: Permanently added '10.128.0.50' (ED25519) to the list of known hosts. execve("./syz-executor1088430077", ["./syz-executor1088430077"], 0x7fff2964d070 /* 10 vars */) = 0 brk(NULL) = 0x55559415a000 brk(0x55559415ad00) = 0x55559415ad00 arch_prctl(ARCH_SET_FS, 0x55559415a380) = 0 set_tid_address(0x55559415a650) = 5057 set_robust_list(0x55559415a660, 24) = 0 rseq(0x55559415aca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1088430077", 4096) = 28 getrandom("\xba\x97\x91\x89\x1a\x03\x61\x2a", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55559415ad00 brk(0x55559417bd00) = 0x55559417bd00 brk(0x55559417c000) = 0x55559417c000 mprotect(0x7f54daca9000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5058 attached , child_tidptr=0x55559415a650) = 5058 [pid 5058] set_robust_list(0x55559415a660, 24) = 0 [pid 5058] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5058] setpgid(0, 0) = 0 [pid 5058] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5058] write(3, "1000", 4) = 4 [pid 5058] close(3) = 0 [pid 5058] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 5058] mount("mtd0x0000000000000000", "./file0", "jffs2", MS_RDONLY|MS_NOSUID, NULL) = 0 [pid 5058] fspick(AT_FDCWD, "./file0/../file0", 0) = 3 [pid 5058] fsconfig(3, FSCONFIG_CMD_RECONFIGURE, NULL, NULL, 0) = 0 [pid 5058] exit_group(0) = ? [pid 5058] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5058, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5060 attached , child_tidptr=0x55559415a650) = 5060 [pid 5060] set_robust_list(0x55559415a660, 24) = 0 [pid 5060] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5060] setpgid(0, 0) = 0 [pid 5060] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5060] write(3, "1000", 4) = 4 [pid 5060] close(3) = 0 [ 66.385621][ T5058] jffs2: notice: (5058) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found. [pid 5060] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists) [pid 5060] mount("mtd0x0000000000000000", "./file0", "jffs2", MS_RDONLY|MS_NOSUID, NULL) = -1 EBUSY (Device or resource busy) [pid 5060] fspick(AT_FDCWD, "./file0/../file0", 0) = 3 [ 66.468164][ T5060] ------------[ cut here ]------------ [ 66.474229][ T5060] kernel BUG at fs/jffs2/background.c:40! [ 66.480545][ T5060] invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI [ 66.487248][ T5060] CPU: 0 PID: 5060 Comm: syz-executor108 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 [ 66.497424][ T5060] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 66.507487][ T5060] RIP: 0010:jffs2_start_garbage_collect_thread+0x1f5/0x200 [ 66.515059][ T5060] Code: 03 ff e9 1b ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 64 ff ff ff 48 89 df e8 76 78 03 ff e9 57 ff ff ff e8 9c 77 a3 fe 90 <0f> 0b 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 [ 66.535018][ T5060] RSP: 0018:ffffc9000422fd00 EFLAGS: 00010293 [ 66.541176][ T5060] RAX: ffffffff82f17cb4 RBX: ffff8880240a6018 RCX: ffff8880242b5a00 [ 66.549313][ T5060] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880240a6000 [ 66.557265][ T5060] RBP: 0000000000000000 R08: ffffffff82f1c1c9 R09: 1ffff92000845f94 [ 66.565496][ T5060] R10: dffffc0000000000 R11: fffff52000845f95 R12: ffff8880240a6000 [ 66.573458][ T5060] R13: dffffc0000000000 R14: ffff8880240a6000 R15: ffff88802e7774f8 [ 66.581440][ T5060] FS: 000055559415a380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 [ 66.590379][ T5060] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.596956][ T5060] CR2: 00007f54dacad0d0 CR3: 000000007aeec000 CR4: 00000000003506f0 [ 66.604938][ T5060] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.612920][ T5060] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.620920][ T5060] Call Trace: [ 66.624189][ T5060] [ 66.627105][ T5060] ? __die_body+0x88/0xe0 [ 66.631573][ T5060] ? die+0xcf/0x110 [ 66.635462][ T5060] ? do_trap+0x15a/0x3a0 [ 66.639783][ T5060] ? jffs2_start_garbage_collect_thread+0x1f5/0x200 [ 66.646439][ T5060] ? do_error_trap+0x1dc/0x2c0 [ 66.651219][ T5060] ? jffs2_start_garbage_collect_thread+0x1f5/0x200 [ 66.657925][ T5060] ? __pfx_do_error_trap+0x10/0x10 [ 66.663123][ T5060] ? report_bug+0x3e8/0x500 [ 66.667645][ T5060] ? handle_invalid_op+0x34/0x40 [ 66.672658][ T5060] ? jffs2_start_garbage_collect_thread+0x1f5/0x200 [ 66.679235][ T5060] ? exc_invalid_op+0x38/0x50 [ 66.683940][ T5060] ? asm_exc_invalid_op+0x1a/0x20 [ 66.689258][ T5060] ? jffs2_do_remount_fs+0x149/0x1d0 [ 66.694546][ T5060] ? jffs2_start_garbage_collect_thread+0x1f4/0x200 [ 66.701182][ T5060] ? jffs2_start_garbage_collect_thread+0x1f5/0x200 [ 66.707890][ T5060] jffs2_do_remount_fs+0x15b/0x1d0 [ 66.713375][ T5060] reconfigure_super+0x445/0x880 [ 66.718562][ T5060] __se_sys_fsconfig+0xab5/0xec0 [ 66.723661][ T5060] ? __pfx___se_sys_fsconfig+0x10/0x10 [ 66.729127][ T5060] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 66.735648][ T5060] ? exc_page_fault+0x585/0x890 [ 66.740603][ T5060] ? __x64_sys_fsconfig+0x20/0xc0 [ 66.745710][ T5060] do_syscall_64+0xfb/0x240 [ 66.750228][ T5060] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 66.756218][ T5060] RIP: 0033:0x7f54dac35cf9 [ 66.760648][ T5060] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 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 [ 66.780597][ T5060] RSP: 002b:00007ffc9713c8d8 EFLAGS: 00000246 ORIG_RAX: 00000000000001af [ 66.789089][ T5060] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f54dac35cf9 [ 66.797131][ T5060] RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000003 [ 66.805189][ T5060] RBP: 0000000000010305 R08: 0000000000000000 R09: 0000000000000006 [ 66.813244][ T5060] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc9713c8ec [ 66.821592][ T5060] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 66.829637][ T5060] [ 66.832636][ T5060] Modules linked in: [ 66.838624][ T5060] ---[ end trace 0000000000000000 ]--- [ 66.844206][ T5060] RIP: 0010:jffs2_start_garbage_collect_thread+0x1f5/0x200 [ 66.851925][ T5060] Code: 03 ff e9 1b ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 64 ff ff ff 48 89 df e8 76 78 03 ff e9 57 ff ff ff e8 9c 77 a3 fe 90 <0f> 0b 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 [ 66.872652][ T5060] RSP: 0018:ffffc9000422fd00 EFLAGS: 00010293 [ 66.878847][ T5060] RAX: ffffffff82f17cb4 RBX: ffff8880240a6018 RCX: ffff8880242b5a00 [ 66.887463][ T5060] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880240a6000 [ 66.895714][ T5060] RBP: 0000000000000000 R08: ffffffff82f1c1c9 R09: 1ffff92000845f94 [ 66.903787][ T5060] R10: dffffc0000000000 R11: fffff52000845f95 R12: ffff8880240a6000 [ 66.912256][ T5060] R13: dffffc0000000000 R14: ffff8880240a6000 R15: ffff88802e7774f8 [ 66.920436][ T5060] FS: 000055559415a380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 [ 66.929604][ T5060] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.936753][ T5060] CR2: 00007ffc9713c7d8 CR3: 000000007aeec000 CR4: 00000000003506f0 [ 66.945353][ T5060] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.953447][ T5060] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.961732][ T5060] Kernel panic - not syncing: Fatal exception [ 66.968550][ T5060] Kernel Offset: disabled [ 66.973429][ T5060] Rebooting in 86400 seconds..