./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1399539083 <...> syzkaller syzkaller login: [ 47.184830][ T26] kauditd_printk_skb: 42 callbacks suppressed [ 47.184844][ T26] audit: type=1400 audit(1688103605.778:77): avc: denied { transition } for pid=4842 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 [ 47.213582][ T26] audit: type=1400 audit(1688103605.778:78): avc: denied { noatsecure } for pid=4842 comm="sshd" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 47.233014][ T26] audit: type=1400 audit(1688103605.788:79): avc: denied { write } for pid=4842 comm="sh" path="pipe:[28324]" dev="pipefs" ino=28324 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 47.269996][ T26] audit: type=1400 audit(1688103605.788:80): avc: denied { rlimitinh } for pid=4842 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 47.289062][ T26] audit: type=1400 audit(1688103605.788:81): avc: denied { siginh } for pid=4842 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 48.558877][ T26] audit: type=1400 audit(1688103607.148:82): avc: denied { read } for pid=4429 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 '10.128.0.40' (ECDSA) to the list of known hosts. execve("./syz-executor1399539083", ["./syz-executor1399539083"], 0x7ffe8490d340 /* 10 vars */) = 0 brk(NULL) = 0x55555753a000 brk(0x55555753ac40) = 0x55555753ac40 arch_prctl(ARCH_SET_FS, 0x55555753a300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1399539083", 4096) = 28 brk(0x55555755bc40) = 0x55555755bc40 brk(0x55555755c000) = 0x55555755c000 mprotect(0x7f66e9763000, 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 open("./file0", O_RDWR|O_CREAT|0x3c, 000) = 3 [ 63.235489][ T26] audit: type=1400 audit(1688103621.828:83): avc: denied { write } for pid=4989 comm="strace-static-x" path="pipe:[30227]" dev="pipefs" ino=30227 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 63.262196][ T26] audit: type=1400 audit(1688103621.858:84): avc: denied { execmem } for pid=4992 comm="syz-executor139" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 memfd_create("syzkaller", 0) = 4 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f66e12a0000 write(4, "\xb5\x84\x31\x7b\xb6\x84\x31\x7b\xb7\x84\x31\x7b\xb8\x84\x31\x7b\xb9\x84\x31\x7b\xba\x84\x31\x7b\xbb\x84\x31\x7b\xbc\x84\x31\x7b\xbd\x84\x31\x7b\xbe\x84\x31\x7b\xbf\x84\x31\x7b\xc0\x84\x31\x7b\xc1\x84\x31\x7b\xc2\x84\x31\x7b\xc3\x84\x31\x7b\xc4\x84\x31\x7b\xc5\x84\x31\x7b\xc6\x84\x31\x7b\xc7\x84\x31\x7b\xc8\x84\x31\x7b\xc9\x84\x31\x7b\xca\x84\x31\x7b\xcb\x84\x31\x7b\xcc\x84\x31\x7b\xcd\x84\x31\x7b"..., 65536) = 65536 munmap(0x7f66e12a0000, 65536) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 ioctl(5, LOOP_SET_FD, 4) = 0 close(4) = 0 mkdir("./file0", 0777) = -1 EEXIST (File exists) [ 63.265499][ T4992] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4992 'syz-executor139' [ 63.296139][ T26] audit: type=1400 audit(1688103621.888:85): avc: denied { read write } for pid=4992 comm="syz-executor139" name="loop0" dev="devtmpfs" ino=648 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 63.298577][ T4992] loop0: detected capacity change from 0 to 128 [ 63.321513][ T26] audit: type=1400 audit(1688103621.888:86): avc: denied { open } for pid=4992 comm="syz-executor139" path="/dev/loop0" dev="devtmpfs" ino=648 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 63.351432][ T26] audit: type=1400 audit(1688103621.888:87): avc: denied { ioctl } for pid=4992 comm="syz-executor139" path="/dev/loop0" dev="devtmpfs" ino=648 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 mount("/dev/loop0", "./file0", "sysv", 0, "") = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = -1 ENOTDIR (Not a directory) ioctl(5, LOOP_CLR_FD) = 0 [ 63.378229][ T26] audit: type=1400 audit(1688103621.928:88): avc: denied { mounton } for pid=4992 comm="syz-executor139" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=file permissive=1 [ 63.378291][ T4992] VFS: Found a Xenix FS (block size = 512) on device loop0 [ 63.409421][ T26] audit: type=1400 audit(1688103621.998:89): avc: denied { mount } for pid=4992 comm="syz-executor139" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:sysv_t tclass=filesystem permissive=1 close(5) = 0 [ 63.433437][ T26] audit: type=1400 audit(1688103622.038:90): avc: denied { append } for pid=4429 comm="syslogd" name="messages" dev="tmpfs" ino=3 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 63.442667][ T4992] syz-executor139: attempt to access beyond end of device [ 63.442667][ T4992] loop0: rw=0, sector=3245512, nr_sectors = 1 limit=128 [ 63.456031][ T26] audit: type=1400 audit(1688103622.038:91): avc: denied { open } for pid=4429 comm="syslogd" path="/tmp/messages" dev="tmpfs" ino=3 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 63.481291][ T4992] Buffer I/O error on dev loop0, logical block 3245512, async page read [ 63.501956][ T4992] syz-executor139: attempt to access beyond end of device [ 63.501956][ T4992] loop0: rw=0, sector=8767867, nr_sectors = 1 limit=128 [ 63.507880][ T26] audit: type=1400 audit(1688103622.038:92): avc: denied { getattr } for pid=4429 comm="syslogd" path="/tmp/messages" dev="tmpfs" ino=3 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 63.517036][ T4992] Buffer I/O error on dev loop0, logical block 8767867, async page read [ 63.548290][ T4992] syz-executor139: attempt to access beyond end of device [ 63.548290][ T4992] loop0: rw=0, sector=13269809, nr_sectors = 1 limit=128 [ 63.562331][ T4992] Buffer I/O error on dev loop0, logical block 13269809, async page read [ 63.570769][ T4992] syz-executor139: attempt to access beyond end of device [ 63.570769][ T4992] loop0: rw=0, sector=8073605, nr_sectors = 1 limit=128 [ 63.584718][ T4992] Buffer I/O error on dev loop0, logical block 8073605, async page read [ 63.593118][ T4992] syz-executor139: attempt to access beyond end of device [ 63.593118][ T4992] loop0: rw=0, sector=3245515, nr_sectors = 1 limit=128 [ 63.607054][ T4992] Buffer I/O error on dev loop0, logical block 3245515, async page read [ 63.615424][ T4992] syz-executor139: attempt to access beyond end of device [ 63.615424][ T4992] loop0: rw=0, sector=8768635, nr_sectors = 1 limit=128 [ 63.629387][ T4992] Buffer I/O error on dev loop0, logical block 8768635, async page read [ 63.637884][ T4992] syz-executor139: attempt to access beyond end of device [ 63.637884][ T4992] loop0: rw=0, sector=13466417, nr_sectors = 1 limit=128 [ 63.651926][ T4992] Buffer I/O error on dev loop0, logical block 13466417, async page read [ 63.660383][ T4992] syz-executor139: attempt to access beyond end of device [ 63.660383][ T4992] loop0: rw=0, sector=8073605, nr_sectors = 1 limit=128 [ 63.674326][ T4992] Buffer I/O error on dev loop0, logical block 8073605, async page read [ 63.683099][ T4992] BUG: sleeping function called from invalid context at fs/buffer.c:1379 [ 63.691668][ T4992] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4992, name: syz-executor139 [ 63.701221][ T4992] preempt_count: 1, expected: 0 [ 63.706060][ T4992] RCU nest depth: 0, expected: 0 [ 63.710976][ T4992] 3 locks held by syz-executor139/4992: [ 63.716569][ T4992] #0: ffff8880789a0980 (&iint->mutex){+.+.}-{3:3}, at: process_measurement+0x678/0x1940 [ 63.726500][ T4992] #1: ffff88807134ddb8 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x153/0x5e0 [ 63.737781][ T4992] #2: ffffffff8cb8e5b8 (pointers_lock){.+.+}-{2:2}, at: get_block+0x16b/0x1620 [ 63.746899][ T4992] Preemption disabled at: [ 63.746907][ T4992] [<0000000000000000>] 0x0 [ 63.755715][ T4992] CPU: 0 PID: 4992 Comm: syz-executor139 Not tainted 6.4.0-syzkaller-01406-ge8f75c0270d9 #0 [ 63.765783][ T4992] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 63.775837][ T4992] Call Trace: [ 63.779115][ T4992] [ 63.782046][ T4992] dump_stack_lvl+0x136/0x150 [ 63.786746][ T4992] __might_resched+0x358/0x580 [ 63.791524][ T4992] __bread_gfp+0x40/0x330 [ 63.795857][ T4992] get_branch+0x2cd/0x640 [ 63.800195][ T4992] get_block+0x188/0x1620 [ 63.804530][ T4992] ? find_held_lock+0x2d/0x110 [ 63.809297][ T4992] ? free_branches+0x3d0/0x3d0 [ 63.814064][ T4992] ? folio_create_buffers+0x10b/0x160 [ 63.819448][ T4992] ? lock_downgrade+0x690/0x690 [ 63.824304][ T4992] ? folio_flags.constprop.0+0x53/0x150 [ 63.829853][ T4992] ? do_raw_spin_unlock+0x175/0x230 [ 63.835069][ T4992] ? _raw_spin_unlock+0x28/0x40 [ 63.839928][ T4992] block_read_full_folio+0x41d/0xab0 [ 63.845220][ T4992] ? free_branches+0x3d0/0x3d0 [ 63.849991][ T4992] ? decrypt_bh+0x390/0x390 [ 63.854499][ T4992] ? folio_add_lru+0x449/0x7c0 [ 63.859267][ T4992] ? sysv_bmap+0x30/0x30 [ 63.863513][ T4992] read_pages+0x9fb/0xd40 [ 63.867841][ T4992] ? folio_add_lru+0x47f/0x7c0 [ 63.872606][ T4992] ? folio_flags.constprop.0+0x150/0x150 [ 63.878242][ T4992] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 63.884228][ T4992] ? find_held_lock+0x2d/0x110 [ 63.889001][ T4992] page_cache_ra_unbounded+0x477/0x5e0 [ 63.894462][ T4992] page_cache_ra_order+0x6ec/0xa00 [ 63.899573][ T4992] ? blk_cgroup_congested+0x147/0x2a0 [ 63.904966][ T4992] ondemand_readahead+0x6b3/0x1080 [ 63.910080][ T4992] page_cache_sync_ra+0x1c0/0x1f0 [ 63.915111][ T4992] filemap_get_pages+0x28d/0x1620 [ 63.920145][ T4992] ? filemap_add_folio+0x1e0/0x1e0 [ 63.925260][ T4992] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 63.931250][ T4992] filemap_read+0x32c/0xc30 [ 63.935764][ T4992] ? filemap_get_pages+0x1620/0x1620 [ 63.941050][ T4992] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 63.946891][ T4992] ? lockdep_hardirqs_on+0x7d/0x100 [ 63.952102][ T4992] ? _raw_spin_unlock_irqrestore+0x41/0x70 [ 63.957913][ T4992] ? __stack_depot_save+0x23b/0x510 [ 63.963118][ T4992] generic_file_read_iter+0x3b3/0x5b0 [ 63.968494][ T4992] ? process_measurement+0xd32/0x1940 [ 63.973870][ T4992] ? ima_file_check+0xba/0x100 [ 63.978634][ T4992] ? path_openat+0x1588/0x2710 [ 63.983412][ T4992] ? iov_iter_kvec+0x49/0x1c0 [ 63.988094][ T4992] __kernel_read+0x2ca/0x870 [ 63.992686][ T4992] ? __ia32_sys_llseek+0x380/0x380 [ 63.997799][ T4992] ? lock_downgrade+0x690/0x690 [ 64.002660][ T4992] ? mark_held_locks+0x9f/0xe0 [ 64.007431][ T4992] integrity_kernel_read+0x7f/0xb0 [ 64.012545][ T4992] ? integrity_inode_free+0x310/0x310 [ 64.017917][ T4992] ? kasan_set_track+0x25/0x30 [ 64.022682][ T4992] ima_calc_file_hash_tfm+0x2b9/0x3c0 [ 64.028077][ T4992] ? calc_buffer_shash_tfm+0x2b0/0x2b0 [ 64.033560][ T4992] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 64.039558][ T4992] ? _find_first_zero_bit+0x94/0xb0 [ 64.044791][ T4992] ? lockdep_unlock+0x11b/0x290 [ 64.049648][ T4992] ? lock_sync+0x190/0x190 [ 64.054072][ T4992] ? ima_alloc_tfm+0x214/0x2d0 [ 64.058852][ T4992] ima_calc_file_hash+0x198/0x4b0 [ 64.063884][ T4992] ima_collect_measurement+0x527/0x620 [ 64.069351][ T4992] ? ima_get_action+0xa0/0xa0 [ 64.074037][ T4992] ? ima_get_cache_status+0x1e0/0x1e0 [ 64.079424][ T4992] process_measurement+0xd32/0x1940 [ 64.084652][ T4992] ? mmap_violation_check+0x200/0x200 [ 64.090030][ T4992] ? avc_has_perm_noaudit+0x148/0x3a0 [ 64.095411][ T4992] ? avc_has_perm+0xfe/0x1a0 [ 64.100009][ T4992] ? avc_has_perm_noaudit+0x3a0/0x3a0 [ 64.105392][ T4992] ? inode_has_perm+0x19b/0x210 [ 64.110252][ T4992] ? selinux_file_open+0x306/0x3e0 [ 64.115372][ T4992] ? selinux_inode_create+0x30/0x30 [ 64.120579][ T4992] ? spin_bug+0x1c0/0x1c0 [ 64.124919][ T4992] ? fsnotify_perm.part.0+0x248/0x680 [ 64.130302][ T4992] ima_file_check+0xba/0x100 [ 64.134896][ T4992] ? process_measurement+0x1940/0x1940 [ 64.140358][ T4992] ? may_open+0x1f6/0x420 [ 64.144696][ T4992] path_openat+0x1588/0x2710 [ 64.149299][ T4992] ? path_lookupat+0x840/0x840 [ 64.154069][ T4992] ? find_held_lock+0x2d/0x110 [ 64.158842][ T4992] do_filp_open+0x1ba/0x410 [ 64.163356][ T4992] ? may_open_dev+0xf0/0xf0 [ 64.167867][ T4992] ? find_held_lock+0x2d/0x110 [ 64.172633][ T4992] ? do_raw_spin_lock+0x124/0x2b0 [ 64.177666][ T4992] ? spin_bug+0x1c0/0x1c0 [ 64.182001][ T4992] ? _raw_spin_unlock+0x28/0x40 [ 64.186855][ T4992] ? alloc_fd+0x2e4/0x750 [ 64.191188][ T4992] do_sys_openat2+0x16d/0x510 [ 64.195867][ T4992] ? ptrace_stop.part.0+0x60f/0x8e0 [ 64.201068][ T4992] ? build_open_flags+0x720/0x720 [ 64.206105][ T4992] ? ptrace_notify+0xfe/0x140 [ 64.210784][ T4992] ? lock_downgrade+0x690/0x690 [ 64.215641][ T4992] __x64_sys_open+0x11d/0x1c0 [ 64.220317][ T4992] ? do_sys_open+0x150/0x150 [ 64.224910][ T4992] ? _raw_spin_unlock_irq+0x2e/0x50 [ 64.230110][ T4992] ? ptrace_notify+0xfe/0x140 [ 64.234792][ T4992] do_syscall_64+0x39/0xb0 [ 64.239213][ T4992] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 64.245114][ T4992] RIP: 0033:0x7f66e96ec789 [ 64.249531][ T4992] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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 c0 ff ff ff f7 d8 64 89 01 48 [ 64.269140][ T4992] RSP: 002b:00007ffe791b43b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 64.277553][ T4992] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f66e96ec789 [ 64.285526][ T4992] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 [ 64.293496][ T4992] RBP: 00007f66e96ac020 R08: 0000000000009e07 R09: 0000000000000000 [ 64.301466][ T4992] R10: 00007ffe791b4280 R11: 0000000000000246 R12: 00007f66e96ac0b0 [ 64.309438][ T4992] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 64.317409][ T4992] [ 64.321783][ T4992] syz-executor139: attempt to access beyond end of device [ 64.321783][ T4992] loop0: rw=0, sector=3245518, nr_sectors = 1 limit=128 open("./file0", O_RDONLY) = 4 exit_group(0) = ? +++ exited with 0 +++ [ 64.335816][ T4992] Buffer I/O error on dev loop0, l