./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor878860836 <...> type=1400 audit(1711539004.150:63): avc: denied { write } for pid=287 comm="sh" path="pipe:[10416]" dev="pipefs" ino=10416 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 14.698676][ T23] audit: type=1400 audit(1711539004.150:64): avc: denied { rlimitinh } for pid=287 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 14.717062][ T23] audit: type=1400 audit(1711539004.150:65): avc: denied { siginh } for pid=287 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.1.14' (ED25519) to the list of known hosts. execve("./syz-executor878860836", ["./syz-executor878860836"], 0x7ffd335b99b0 /* 10 vars */) = 0 brk(NULL) = 0x555556838000 brk(0x555556838d00) = 0x555556838d00 arch_prctl(ARCH_SET_FS, 0x555556838380) = 0 set_tid_address(0x555556838650) = 357 set_robust_list(0x555556838660, 24) = 0 rseq(0x555556838ca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor878860836", 4096) = 27 getrandom("\x67\xe5\x08\x19\x90\xf6\x5a\x21", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556838d00 brk(0x555556859d00) = 0x555556859d00 brk(0x55555685a000) = 0x55555685a000 mprotect(0x7f2346b69000, 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 mkdirat(AT_FDCWD, "./file0", 000) = 0 mount(NULL, "./file0", "tmpfs", 0, NULL) = 0 mkdir("./file0/file0", 000) = 0 mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0 chdir("./file0/../file0") = 0 open(".", O_RDONLY) = 3 mkdirat(3, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", 000) = 0 renameat2(3, "./file0", 3, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", RENAME_EXCHANGE) = 0 [ 24.201813][ T23] audit: type=1400 audit(1711539013.680:66): avc: denied { execmem } for pid=357 comm="syz-executor878" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.211546][ T357] ------------[ cut here ]------------ [ 24.221039][ T23] audit: type=1400 audit(1711539013.680:67): avc: denied { mounton } for pid=357 comm="syz-executor878" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 24.226300][ T357] WARNING: CPU: 0 PID: 357 at fs/inode.c:302 drop_nlink+0xbb/0x100 [ 24.248796][ T23] audit: type=1400 audit(1711539013.680:68): avc: denied { mount } for pid=357 comm="syz-executor878" name="/" dev="tmpfs" ino=10590 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:tmpfs_t tclass=filesystem permissive=1 [ 24.256470][ T357] Modules linked in: [ 24.256484][ T357] CPU: 0 PID: 357 Comm: syz-executor878 Not tainted 5.4.265-syzkaller-00009-g43a5ead9254d #0 [ 24.256489][ T357] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 24.256508][ T357] RIP: 0010:drop_nlink+0xbb/0x100 [ 24.278729][ T23] audit: type=1400 audit(1711539013.680:69): avc: denied { mounton } for pid=357 comm="syz-executor878" path="/root/file0" dev="tmpfs" ino=10590 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_tmpfs_t tclass=dir permissive=1 [ 24.282445][ T357] Code: 49 8b 1e 48 8d bb d0 04 00 00 be 08 00 00 00 e8 eb ac f2 ff f0 48 ff 83 d0 04 00 00 5b 41 5c 41 5e 41 5f 5d c3 e8 b5 06 c3 ff <0f> 0b eb 89 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 62 ff ff ff 4c [ 24.292444][ T23] audit: type=1400 audit(1711539013.690:70): avc: denied { mount } for pid=357 comm="syz-executor878" name="/" dev="incremental-fs" ino=10590 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [ 24.302299][ T357] RSP: 0018:ffff8881db8bf890 EFLAGS: 00010293 [ 24.302309][ T357] RAX: ffffffff81a1400b RBX: 1ffff1103c4bf3fc RCX: ffff8881ddd1af40 [ 24.302321][ T357] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 24.307184][ T23] audit: type=1400 audit(1711539013.690:71): avc: denied { write } for pid=357 comm="syz-executor878" name="/" dev="incremental-fs" ino=10590 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 24.329904][ T357] RBP: 0000000000000000 R08: ffffffff81a13f8f R09: 0000000066040345 [ 24.329911][ T357] R10: 00000000292091f5 R11: 0000000066040345 R12: ffff8881e25f9fe0 [ 24.329918][ T357] R13: 00000000292091f5 R14: ffff8881e25f9f98 R15: dffffc0000000000 [ 24.329935][ T357] FS: 0000555556838380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 24.349405][ T23] audit: type=1400 audit(1711539013.690:72): avc: denied { add_name } for pid=357 comm="syz-executor878" name=131377C5FC35D41454D5D41D29AD1A6029598146E6BE166E41AD0DBD4054033C9F33BBDA8224A2F3D772E7636E48B33CBF708372E8F1B9933EC5127743BE2206209EF02DF9CBF2F6E880D338 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 24.372691][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.372703][ T357] CR2: 0000000020004b30 CR3: 00000001dbf6b000 CR4: 00000000003406b0 [ 24.372717][ T357] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.378629][ T23] audit: type=1400 audit(1711539013.690:73): avc: denied { create } for pid=357 comm="syz-executor878" name=131377C5FC35D41454D5D41D29AD1A6029598146E6BE166E41AD0DBD4054033C9F33BBDA8224A2F3D772E7636E48B33CBF708372E8F1B9933EC5127743BE2206209EF02DF9CBF2F6E880D338 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=dir permissive=1 [ 24.386414][ T357] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.394265][ T23] audit: type=1400 audit(1711539013.690:74): avc: denied { associate } for pid=357 comm="syz-executor878" name=131377C5FC35D41454D5D41D29AD1A6029598146E6BE166E41AD0DBD4054033C9F33BBDA8224A2F3D772E7636E48B33CBF708372E8F1B9933EC5127743BE2206209EF02DF9CBF2F6E880D338 scontext=root:object_r:unlabeled_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [ 24.416947][ T357] Call Trace: [ 24.416962][ T357] ? __warn+0x162/0x250 [ 24.416979][ T357] ? report_bug+0x3a1/0x4e0 [ 24.424788][ T23] audit: type=1400 audit(1711539013.690:75): avc: denied { remove_name } for pid=357 comm="syz-executor878" name=131377C5FC35D41454D5D41D29AD1A6029598146E6BE166E41AD0DBD4054033C9F33BBDA8224A2F3D772E7636E48B33CBF708372E8F1B9933EC5127743BE2206209EF02DF9CBF2F6E880D338 dev="incremental-fs" ino=10594 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 24.432578][ T357] ? drop_nlink+0xbb/0x100 [ 24.432589][ T357] ? drop_nlink+0xbb/0x100 [ 24.432597][ T357] ? do_invalid_op+0x6e/0x110 [ 24.432612][ T357] ? invalid_op+0x1e/0x30 [ 24.644007][ T357] ? drop_nlink+0x3f/0x100 [ 24.648250][ T357] ? drop_nlink+0xbb/0x100 [ 24.652505][ T357] ? drop_nlink+0xbb/0x100 [ 24.656759][ T357] shmem_unlink+0x224/0x280 [ 24.661102][ T357] shmem_rename2+0x12d/0x5a0 [ 24.665525][ T357] vfs_rename+0x90e/0xda0 [ 24.669694][ T357] ? __ia32_sys_link+0x70/0x70 [ 24.674290][ T357] ? lockref_get_not_zero+0xbe/0x180 [ 24.679411][ T357] dir_rename_wrap+0x2ed/0x4f0 [ 24.684010][ T357] vfs_rename+0x90e/0xda0 [ 24.688176][ T357] ? dput+0x2a2/0x2f0 [ 24.691999][ T357] ? __ia32_sys_link+0x70/0x70 [ 24.696603][ T357] ? __lookup_hash+0x18e/0x240 [ 24.701197][ T357] do_renameat2+0x889/0x1110 [ 24.705629][ T357] ? may_open+0x340/0x340 [ 24.709801][ T357] ? syscall_trace_enter+0x650/0x940 [ 24.714917][ T357] ? __do_page_fault+0x725/0xbb0 [ 24.719694][ T357] __x64_sys_renameat2+0xb1/0xc0 [ 24.724456][ T357] do_syscall_64+0xca/0x1c0 [ 24.728800][ T357] entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.734525][ T357] ---[ end trace e98fc4b4f13babd2 ]--- [ 24.740133][ T357] list_del corruption. prev->next should be ffff8881e7f40800, but was ffff8881e7f3eb30 [ 24.750045][ T357] ------------[ cut here ]------------ [ 24.755287][ T357] kernel BUG at lib/list_debug.c:61! [ 24.760444][ T357] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 24.766319][ T357] CPU: 0 PID: 357 Comm: syz-executor878 Tainted: G W 5.4.265-syzkaller-00009-g43a5ead9254d #0 [ 24.777685][ T357] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 24.787584][ T357] RIP: 0010:__list_del_entry_valid+0x107/0x120 [ 24.793566][ T357] Code: 4c 89 f6 e8 6a 0b 1e 02 0f 0b 48 c7 c7 00 41 fa 84 4c 89 f6 e8 59 0b 1e 02 0f 0b 48 c7 c7 60 41 fa 84 4c 89 f6 e8 48 0b 1e 02 <0f> 0b 48 c7 c7 c0 41 fa 84 4c 89 f6 e8 37 0b 1e 02 0f 0b 66 0f 1f [ 24.813005][ T357] RSP: 0018:ffff8881db8bfab8 EFLAGS: 00010246 [ 24.818908][ T357] RAX: 0000000000000054 RBX: ffff8881e7f3eb30 RCX: 2369c3de64081000 [ 24.826719][ T357] RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000 [ 24.834531][ T357] RBP: ffff8881e7f40780 R08: ffffffff814d68b2 R09: ffffed103edca9b8 [ 24.842348][ T357] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 24.850155][ T357] R13: ffff8881e7f407c8 R14: ffff8881e7f40800 R15: ffff8881e7f3ec40 [ 24.857967][ T357] FS: 0000555556838380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 24.866731][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.873152][ T357] CR2: 0000000020004b30 CR3: 00000001dbf6b000 CR4: 00000000003406b0 [ 24.880967][ T357] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.888776][ T357] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.896584][ T357] Call Trace: [ 24.899721][ T357] ? __die+0xb4/0x100 [ 24.903532][ T357] ? die+0x26/0x50 [ 24.907091][ T357] ? do_trap+0x1e7/0x340 [ 24.911172][ T357] ? __list_del_entry_valid+0x107/0x120 [ 24.916556][ T357] ? __list_del_entry_valid+0x107/0x120 [ 24.921935][ T357] ? do_invalid_op+0xfb/0x110 [ 24.926447][ T357] ? __list_del_entry_valid+0x107/0x120 [ 24.931830][ T357] ? invalid_op+0x1e/0x30 [ 24.935997][ T357] ? wake_up_klogd+0xb2/0xf0 [ 24.940422][ T357] ? __list_del_entry_valid+0x107/0x120 [ 24.945802][ T357] ? __list_del_entry_valid+0x107/0x120 [ 24.951182][ T357] __dentry_kill+0x242/0x630 [ 24.955609][ T357] dentry_kill+0xb8/0x280 [ 24.959776][ T357] dput+0x154/0x2f0 [ 24.963421][ T357] path_put+0x35/0x60 [ 24.967241][ T357] ? dentry_revalidate+0x350/0x350 [ 24.972186][ T357] dentry_release+0x4e/0xa0 [ 24.976533][ T357] ? dentry_revalidate+0x350/0x350 [ 24.981479][ T357] __dentry_kill+0x48d/0x630 [ 24.985900][ T357] dentry_kill+0xb8/0x280 [ 24.990065][ T357] dput+0x154/0x2f0 [ 24.993728][ T357] do_renameat2+0x9bd/0x1110 [ 24.998140][ T357] ? may_open+0x340/0x340 [ 25.002305][ T357] ? syscall_trace_enter+0x650/0x940 [ 25.007427][ T357] ? __do_page_fault+0x725/0xbb0 [ 25.012199][ T357] __x64_sys_renameat2+0xb1/0xc0 [ 25.016972][ T357] do_syscall_64+0xca/0x1c0 [ 25.021316][ T357] entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 25.027034][ T357] Modules linked in: [ 25.030820][ T357] ---[ end trace e98fc4b4f13babd3 ]--- [ 25.036071][ T357] RIP: 0010:__list_del_entry_valid+0x107/0x120 [ 25.042089][ T357] Code: 4c 89 f6 e8 6a 0b 1e 02 0f 0b 48 c7 c7 00 41 fa 84 4c 89 f6 e8 59 0b 1e 02 0f 0b 48 c7 c7 60 41 fa 84 4c 89 f6 e8 48 0b 1e 02 <0f> 0b 48 c7 c7 c0 41 fa 84 4c 89 f6 e8 37 0b 1e 02 0f 0b 66 0f 1f [ 25.061520][ T357] RSP: 0018:ffff8881db8bfab8 EFLAGS: 00010246 [ 25.067420][ T357] RAX: 0000000000000054 RBX: ffff8881e7f3eb30 RCX: 2369c3de64081000 [ 25.075207][ T357] RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000 [ 25.083046][ T357] RBP: ffff8881e7f40780 R08: ffffffff814d68b2 R09: ffffed103edca9b8 [ 25.090850][ T357] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 25.098663][ T357] R13: ffff8881e7f407c8 R14: ffff8881e7f40800 R15: ffff8881e7f3ec40 [ 25.106486][ T357] FS: 0000555556838380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 25.115222][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.121674][ T357] CR2: 0000000020004b30 CR3: 00000001dbf6b000 CR4: 00000000003406b0 [ 25.129482][ T357] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.137283][ T357] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.145075][ T357] Kernel panic - not syncing: Fatal exception [ 25.151262][ T357] Kernel Offset: disabled [ 25.155386][ T357] Rebooting in 86400 seconds..