./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor211655657 <...> syzkaller syzkaller login: [ 43.856792][ T26] kauditd_printk_skb: 42 callbacks suppressed [ 43.856803][ T26] audit: type=1400 audit(1686481164.294:77): avc: denied { transition } for pid=4839 comm="sshd" path="/bin/sh" dev="sda1" ino=89 scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 43.885308][ T26] audit: type=1400 audit(1686481164.294:78): avc: denied { noatsecure } for pid=4839 comm="sshd" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 43.906216][ T26] audit: type=1400 audit(1686481164.324:79): avc: denied { write } for pid=4839 comm="sh" path="pipe:[29808]" dev="pipefs" ino=29808 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 43.929218][ T26] audit: type=1400 audit(1686481164.324:80): avc: denied { rlimitinh } for pid=4839 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 43.948493][ T26] audit: type=1400 audit(1686481164.324:81): avc: denied { siginh } for pid=4839 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 45.152931][ T26] audit: type=1400 audit(1686481165.584:82): avc: denied { read } for pid=4427 comm="syslogd" name="log" dev="sda1" ino=1915 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:var_t tclass=lnk_file permissive=1 Warning: Permanently added '10.128.1.49' (ECDSA) to the list of known hosts. execve("./syz-executor211655657", ["./syz-executor211655657"], 0x7ffe7c282740 /* 10 vars */) = 0 brk(NULL) = 0x55555736f000 brk(0x55555736fc40) = 0x55555736fc40 arch_prctl(ARCH_SET_FS, 0x55555736f300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor211655657", 4096) = 27 brk(0x555557390c40) = 0x555557390c40 brk(0x555557391000) = 0x555557391000 mprotect(0x7ff8796d5000, 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 unshare(CLONE_NEWPID) = 0 [ 59.783511][ T26] audit: type=1400 audit(1686481180.214:83): avc: denied { write } for pid=4986 comm="strace-static-x" path="pipe:[29547]" dev="pipefs" ino=29547 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555736f5d0) = 4990 ./strace-static-x86_64: Process 4990 attached [pid 4990] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 4990] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 4990] setsid() = 1 [pid 4990] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 4990] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 4990] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 4990] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 4990] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 4990] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 4990] unshare(CLONE_NEWNS) = 0 [pid 4990] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 4990] unshare(CLONE_NEWIPC) = 0 [pid 4990] unshare(CLONE_NEWCGROUP) = 0 [pid 4990] unshare(CLONE_NEWUTS) = 0 [pid 4990] unshare(CLONE_SYSVSEM) = 0 [pid 4990] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 4990] write(3, "16777216", 8) = 8 [pid 4990] close(3) = 0 [pid 4990] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 4990] write(3, "536870912", 9) = 9 [pid 4990] close(3) = 0 [pid 4990] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 4990] write(3, "1024", 4) = 4 [pid 4990] close(3) = 0 [pid 4990] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 4990] write(3, "8192", 4) = 4 [pid 4990] close(3) = 0 [pid 4990] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 4990] write(3, "1024", 4) = 4 [pid 4990] close(3) = 0 [pid 4990] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 4990] write(3, "1024", 4) = 4 [pid 4990] close(3) = 0 [pid 4990] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 4990] write(3, "1024 1048576 500 1024", 21) = 21 [pid 4990] close(3) = 0 [pid 4990] getpid() = 1 [pid 4990] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 0b e8 20 11 32 ff 48 8d 7d 28 48 b8 00 00 00 00 00 fc ff df 48 [ 60.125810][ T2860] RSP: 0018:ffffc9000babf718 EFLAGS: 00010293 [ 60.131874][ T2860] RAX: 0000000000000000 RBX: 1ffff92001757ee4 RCX: 0000000000000000 [ 60.139849][ T2860] RDX: ffff88802a392000 RSI: ffffffff82515689 RDI: 0000000000000007 [ 60.147833][ T2860] RBP: ffff88801eb04198 R08: 0000000000000007 R09: 0000000000000004 [ 60.155800][ T2860] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 [ 60.163782][ T2860] R13: 0000000000000000 R14: ffffc9000babf9b4 R15: ffff88801eb041c0 [ 60.171760][ T2860] FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 60.180792][ T2860] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.187379][ T2860] CR2: 0000561864288828 CR3: 000000007e2fa000 CR4: 00000000003506e0 [ 60.195376][ T2860] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.203444][ T2860] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.211420][ T2860] Call Trace: [ 60.214693][ T2860] [ 60.217617][ T2860] ? die+0x32/0x90 [ 60.221347][ T2860] ? do_trap+0x1b2/0x3f0 [ 60.225590][ T2860] ? hfs_write_inode+0x329/0x9d0 [ 60.230532][ T2860] ? hfs_write_inode+0x329/0x9d0 [ 60.235646][ T2860] ? do_error_trap+0xb1/0x170 [ 60.240411][ T2860] ? hfs_write_inode+0x329/0x9d0 [ 60.245357][ T2860] ? handle_invalid_op+0x2c/0x30 [ 60.250296][ T2860] ? hfs_write_inode+0x329/0x9d0 [ 60.255236][ T2860] ? exc_invalid_op+0x2f/0x50 [ 60.260101][ T2860] ? asm_exc_invalid_op+0x1a/0x20 [ 60.265136][ T2860] ? hfs_write_inode+0x329/0x9d0 [ 60.270091][ T2860] ? hfs_write_inode+0x329/0x9d0 [ 60.275042][ T2860] ? hfs_write_inode+0x329/0x9d0 [ 60.279992][ T2860] ? hfs_inode_write_fork+0x1c0/0x1c0 [ 60.285378][ T2860] ? find_held_lock+0x2d/0x110 [ 60.290151][ T2860] ? __writeback_single_inode+0x2e4/0xdb0 [ 60.295883][ T2860] ? lock_downgrade+0x690/0x690 [ 60.300738][ T2860] ? do_raw_spin_lock+0x124/0x2b0 [ 60.305768][ T2860] ? spin_bug+0x1c0/0x1c0 [ 60.310104][ T2860] __writeback_single_inode+0x9f2/0xdb0 [ 60.315667][ T2860] writeback_sb_inodes+0x54d/0xe70 [ 60.320801][ T2860] ? sync_inode_metadata+0xe0/0xe0 [ 60.325914][ T2860] ? rcu_is_watching+0x12/0xb0 [ 60.330692][ T2860] ? queue_io+0x386/0x4e0 [ 60.335032][ T2860] wb_writeback+0x294/0xa50 [ 60.339535][ T2860] ? __writeback_inodes_wb+0x280/0x280 [ 60.345268][ T2860] ? lock_downgrade+0x690/0x690 [ 60.350221][ T2860] ? mark_held_locks+0x9f/0xe0 [ 60.354986][ T2860] ? _raw_spin_unlock_irq+0x23/0x50 [ 60.360191][ T2860] wb_workfn+0x2a5/0xfc0 [ 60.364431][ T2860] ? inode_wait_for_writeback+0x40/0x40 [ 60.369980][ T2860] ? lock_sync+0x190/0x190 [ 60.374424][ T2860] ? lock_downgrade+0x690/0x690 [ 60.379279][ T2860] ? _raw_spin_unlock_irq+0x23/0x50 [ 60.384486][ T2860] process_one_work+0x99a/0x15e0 [ 60.389431][ T2860] ? pwq_dec_nr_in_flight+0x2a0/0x2a0 [ 60.394811][ T2860] ? spin_bug+0x1c0/0x1c0 [ 60.399147][ T2860] ? _raw_spin_lock_irq+0x45/0x50 [ 60.404189][ T2860] worker_thread+0x67d/0x10c0 [ 60.408873][ T2860] ? process_one_work+0x15e0/0x15e0 [ 60.414076][ T2860] kthread+0x344/0x440 [ 60.418147][ T2860] ? kthread_complete_and_exit+0x40/0x40 [ 60.423788][ T2860] ret_from_fork+0x1f/0x30 [ 60.428212][ T2860] [ 60.431227][ T2860] Modules linked in: [ 60.435718][ T2860] ---[ end trace 0000000000000000 ]--- [ 60.441218][ T2860] RIP: 0010:hfs_write_inode+0x329/0x9d0 [ 60.446967][ T2860] Code: da 66 8a 4c 89 ef e8 a6 0d 32 ff 49 83 fd 03 0f 84 d8 02 00 00 49 83 fd 04 74 11 49 83 fd 02 0f 84 bc fd ff ff e8 27 11 32 ff <0f> 0b e8 20 11 32 ff 48 8d 7d 28 48 b8 00 00 00 00 00 fc ff df 48 [ 60.466824][ T2860] RSP: 0018:ffffc9000babf718 EFLAGS: 00010293 [ 60.472911][ T2860] RAX: 0000000000000000 RBX: 1ffff92001757ee4 RCX: 0000000000000000 [ 60.481023][ T2860] RDX: ffff88802a392000 RSI: ffffffff82515689 RDI: 0000000000000007 [ 60.489046][ T2860] RBP: ffff88801eb04198 R08: 0000000000000007 R09: 0000000000000004 [ 60.497045][ T2860] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 [ 60.505023][ T2860] R13: 0000000000000000 R14: ffffc9000babf9b4 R15: ffff88801eb041c0 [ 60.513194][ T2860] FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 60.522193][ T2860] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.528868][ T2860] CR2: 00005584891bbf68 CR3: 000000007e2fa000 CR4: 00000000003506f0 [ 60.536898][ T2860] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.544897][ T2860] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.553068][ T2860] Kernel panic - not syncing: Fatal exception [ 60.559297][ T2860] Kernel Offset: disabled [ 60.563698][ T2860] Rebooting in 86400 seconds..