====================================================== WARNING: possible circular locking dependency detected 4.14.175-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/16946 is trying to acquire lock: (&sig->cred_guard_mutex){+.+.}, at: [] do_io_accounting+0x1c7/0x750 fs/proc/base.c:2726 but task is already holding lock: (&p->lock){+.+.}, at: [] seq_read+0xba/0x1160 fs/seq_file.c:165 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&p->lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xe8/0x1470 kernel/locking/mutex.c:893 seq_read+0xba/0x1160 fs/seq_file.c:165 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x3e3/0x5a0 fs/read_write.c:919 vfs_readv+0xd3/0x130 fs/read_write.c:981 kernel_readv fs/splice.c:361 [inline] default_file_splice_read+0x41d/0x870 fs/splice.c:416 do_splice_to+0xfb/0x150 fs/splice.c:880 splice_direct_to_actor+0x20a/0x730 fs/splice.c:952 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x469/0xaf0 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #2 (sb_writers#3){.+.+}: percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x1a1/0x2e0 fs/super.c:1363 sb_start_write include/linux/fs.h:1549 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 ovl_xattr_set+0x4d/0x270 fs/overlayfs/inode.c:214 ovl_posix_acl_xattr_set+0x3f9/0x830 fs/overlayfs/super.c:762 __vfs_setxattr+0xdc/0x130 fs/xattr.c:150 __vfs_setxattr_noperm+0xfd/0x3c0 fs/xattr.c:181 vfs_setxattr+0xba/0xe0 fs/xattr.c:224 setxattr+0x1a9/0x300 fs/xattr.c:453 path_setxattr+0x118/0x130 fs/xattr.c:472 SYSC_lsetxattr fs/xattr.c:494 [inline] SyS_lsetxattr+0x33/0x40 fs/xattr.c:490 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #1 (&ovl_i_mutex_dir_key[depth]){++++}: down_read+0x37/0xa0 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:729 [inline] do_last fs/namei.c:3333 [inline] path_openat+0x185a/0x3c50 fs/namei.c:3569 do_filp_open+0x18e/0x250 fs/namei.c:3603 do_open_execat+0xda/0x430 fs/exec.c:849 do_execveat_common.isra.0+0x694/0x1c70 fs/exec.c:1740 do_execve fs/exec.c:1847 [inline] SYSC_execve fs/exec.c:1928 [inline] SyS_execve+0x34/0x40 fs/exec.c:1923 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #0 (&sig->cred_guard_mutex){+.+.}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3994 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xe8/0x1470 kernel/locking/mutex.c:893 do_io_accounting+0x1c7/0x750 fs/proc/base.c:2726 proc_single_show+0xe7/0x150 fs/proc/base.c:761 seq_read+0x4d2/0x1160 fs/seq_file.c:237 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x3e3/0x5a0 fs/read_write.c:919 vfs_readv+0xd3/0x130 fs/read_write.c:981 kernel_readv fs/splice.c:361 [inline] default_file_splice_read+0x41d/0x870 fs/splice.c:416 do_splice_to+0xfb/0x150 fs/splice.c:880 splice_direct_to_actor+0x20a/0x730 fs/splice.c:952 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x469/0xaf0 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 other info that might help us debug this: Chain exists of: &sig->cred_guard_mutex --> sb_writers#3 --> &p->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&p->lock); lock(sb_writers#3); lock(&p->lock); lock(&sig->cred_guard_mutex); *** DEADLOCK *** 1 lock held by syz-executor.1/16946: #0: (&p->lock){+.+.}, at: [] seq_read+0xba/0x1160 fs/seq_file.c:165 stack backtrace: CPU: 0 PID: 16946 Comm: syz-executor.1 Not tainted 4.14.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 print_circular_bug.isra.0.cold+0x1c4/0x282 kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1901 [inline] check_prevs_add kernel/locking/lockdep.c:2018 [inline] validate_chain kernel/locking/lockdep.c:2460 [inline] __lock_acquire+0x2cb3/0x4620 kernel/locking/lockdep.c:3487 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3994 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xe8/0x1470 kernel/locking/mutex.c:893 do_io_accounting+0x1c7/0x750 fs/proc/base.c:2726 proc_single_show+0xe7/0x150 fs/proc/base.c:761 seq_read+0x4d2/0x1160 fs/seq_file.c:237 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x3e3/0x5a0 fs/read_write.c:919 vfs_readv+0xd3/0x130 fs/read_write.c:981 kernel_readv fs/splice.c:361 [inline] default_file_splice_read+0x41d/0x870 fs/splice.c:416 do_splice_to+0xfb/0x150 fs/splice.c:880 splice_direct_to_actor+0x20a/0x730 fs/splice.c:952 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x469/0xaf0 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c889 RSP: 002b:00007f73d5240c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f73d52416d4 RCX: 000000000045c889 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000007 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0400000020000001 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000008d4 R14: 00000000004cb7c6 R15: 000000000076bf0c IPVS: sh: UDP 224.0.0.2:0 - no destination available overlayfs: filesystem on './file0' not supported as upperdir UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 IPVS: sh: UDP 224.0.0.2:0 - no destination available UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 IPVS: sh: UDP 224.0.0.2:0 - no destination available UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found IPVS: sh: UDP 224.0.0.2:0 - no destination available UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed IPVS: sh: UDP 224.0.0.2:0 - no destination available UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) CPU: 1 PID: 17662 Comm: syz-executor.1 Not tainted 4.14.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x14b lib/fault-inject.c:149 should_failslab+0xd6/0x130 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3376 [inline] __do_kmalloc mm/slab.c:3718 [inline] __kmalloc_track_caller+0x2e1/0x7b0 mm/slab.c:3735 memdup_user+0x22/0xa0 mm/util.c:164 strndup_user+0x5b/0xf0 mm/util.c:195 copy_mount_string fs/namespace.c:2783 [inline] SYSC_mount fs/namespace.c:3080 [inline] SyS_mount+0x39/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c889 RSP: 002b:00007f73d5240c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f73d52416d4 RCX: 000000000045c889 RDX: 0000000020000140 RSI: 0000000020000200 RDI: 0000000020000080 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000749 R14: 00000000004ca15a R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 17669 Comm: syz-executor.1 Not tainted 4.14.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x14b lib/fault-inject.c:149 should_failslab+0xd6/0x130 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3376 [inline] __do_kmalloc mm/slab.c:3718 [inline] __kmalloc_track_caller+0x2e1/0x7b0 mm/slab.c:3735 memdup_user+0x22/0xa0 mm/util.c:164 strndup_user+0x5b/0xf0 mm/util.c:195 UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 copy_mount_string fs/namespace.c:2783 [inline] SYSC_mount fs/namespace.c:3085 [inline] SyS_mount+0x68/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c889 RSP: 002b:00007f73d5240c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 RAX: ffffffffffffffda RBX: 00007f73d52416d4 RCX: 000000000045c889 RDX: 0000000020000140 RSI: 0000000020000200 RDI: 0000000020000080 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000749 R14: 00000000004ca15a R15: 0000000000000001 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 17676 Comm: syz-executor.2 Not tainted 4.14.175-syzkaller #0 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 UDF-fs: warning (device md0): udf_load_vrs: No anchor found Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x14b lib/fault-inject.c:149 should_failslab+0xd6/0x130 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3297 [inline] kmem_cache_alloc_node+0x288/0x7a0 mm/slab.c:3640 __alloc_skb+0x9a/0x4c0 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:980 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1159 [inline] netlink_sendmsg+0x7de/0xbe0 net/netlink/af_netlink.c:1853 UDF-fs: Scanning with blocksize 2048 failed sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xc5/0x100 net/socket.c:656 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c889 RSP: 002b:00007f9477b13c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f9477b146d4 RCX: 000000000045c889 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 00000000000009fc R14: 00000000004ccb7c R15: 0000000000000000 CPU: 1 PID: 17679 Comm: syz-executor.1 Not tainted 4.14.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x14b lib/fault-inject.c:149 should_failslab+0xd6/0x130 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3376 [inline] kmem_cache_alloc+0x2b5/0x770 mm/slab.c:3550 getname_flags fs/namei.c:138 [inline] getname_flags+0xc8/0x560 fs/namei.c:128 user_path_at_empty+0x2a/0x50 fs/namei.c:2631 user_path include/linux/namei.h:62 [inline] do_mount+0x10b/0x24f0 fs/namespace.c:2819 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c889 RSP: 002b:00007f73d5240c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f73d52416d4 RCX: 000000000045c889 RDX: 0000000020000140 RSI: 0000000020000200 RDI: 0000000020000080 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000749 R14: 00000000004ca15a R15: 0000000000000002 CPU: 0 PID: 17685 Comm: syz-executor.4 Not tainted 4.14.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x14b lib/fault-inject.c:149 should_failslab+0xd6/0x130 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3376 [inline] kmem_cache_alloc_trace+0x2db/0x7b0 mm/slab.c:3616 kmalloc include/linux/slab.h:488 [inline] kzalloc include/linux/slab.h:661 [inline] kvm_arch_alloc_vm include/linux/kvm_host.h:816 [inline] kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:651 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3270 [inline] kvm_dev_ioctl+0x15b/0x1480 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3321 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c889 RSP: 002b:00007f522568fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f52256906d4 RCX: 000000000045c889 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000004 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 000000000000038f R14: 00000000004c6097 R15: 0000000000000000 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device md0): udf_fill_super: No partition found (1) FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 17687 Comm: syz-executor.1 Not tainted 4.14.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x14b lib/fault-inject.c:149 should_fail_alloc_page mm/page_alloc.c:2891 [inline] prepare_alloc_pages mm/page_alloc.c:4124 [inline] __alloc_pages_nodemask+0x1bf/0x700 mm/page_alloc.c:4172 __alloc_pages include/linux/gfp.h:484 [inline] __alloc_pages_node include/linux/gfp.h:497 [inline] kmem_getpages mm/slab.c:1419 [inline] cache_grow_begin+0x7b/0x410 mm/slab.c:2676 cache_alloc_refill mm/slab.c:3043 [inline] ____cache_alloc mm/slab.c:3125 [inline] ____cache_alloc mm/slab.c:3108 [inline] __do_cache_alloc mm/slab.c:3347 [inline] slab_alloc mm/slab.c:3382 [inline] kmem_cache_alloc+0x695/0x770 mm/slab.c:3550 getname_flags fs/namei.c:138 [inline] getname_flags+0xc8/0x560 fs/namei.c:128 user_path_at_empty+0x2a/0x50 fs/namei.c:2631 user_path include/linux/namei.h:62 [inline] do_mount+0x10b/0x24f0 fs/namespace.c:2819 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c889 RSP: 002b:00007f73d5240c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f73d52416d4 RCX: 000000000045c889 RDX: 0000000020000140 RSI: 0000000020000200 RDI: 0000000020000080 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000749 R14: 00000000004ca15a R15: 0000000000000003 UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device md0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device md0): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device md0): udf_load_vrs: No anchor found netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. UDF-fs: Scanning with blocksize 2048 failed FAULT_INJECTION: forcing a failure.