tmpfs: Bad value '00000000000000060928 k' for mount option 'uid' ====================================================== WARNING: possible circular locking dependency detected 4.14.218-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/18509 is trying to acquire lock: (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] inode_lock_shared include/linux/fs.h:729 [inline] (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] do_last fs/namei.c:3333 [inline] (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] path_openat+0x149b/0x2970 fs/namei.c:3569 but task is already holding lock: (&sig->cred_guard_mutex){+.+.}, at: [] prepare_bprm_creds fs/exec.c:1404 [inline] (&sig->cred_guard_mutex){+.+.}, at: [] do_execveat_common+0x319/0x1f30 fs/exec.c:1748 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&sig->cred_guard_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 lock_trace fs/proc/base.c:407 [inline] proc_pid_syscall+0xa7/0x2a0 fs/proc/base.c:639 proc_single_show+0xe7/0x150 fs/proc/base.c:761 seq_read+0x4cf/0x1120 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+0x3eb/0x5b0 fs/read_write.c:919 vfs_readv+0xc8/0x120 fs/read_write.c:981 do_preadv fs/read_write.c:1065 [inline] SYSC_preadv fs/read_write.c:1115 [inline] SyS_preadv+0x15a/0x200 fs/read_write.c:1110 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #2 (&p->lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 seq_read+0xba/0x1120 fs/seq_file.c:165 proc_reg_read+0xee/0x1a0 fs/proc/inode.c:217 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x3eb/0x5b0 fs/read_write.c:919 vfs_readv+0xc8/0x120 fs/read_write.c:981 kernel_readv fs/splice.c:361 [inline] default_file_splice_read+0x418/0x910 fs/splice.c:416 do_splice_to+0xfb/0x140 fs/splice.c:880 splice_direct_to_actor+0x207/0x730 fs/splice.c:952 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x47f/0xb30 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+0x46/0xbb -> #1 (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+0x64/0x260 fs/super.c:1342 sb_start_write include/linux/fs.h:1549 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 ovl_do_remove+0x67/0xb90 fs/overlayfs/dir.c:759 vfs_rmdir.part.0+0x144/0x390 fs/namei.c:3908 vfs_rmdir fs/namei.c:3893 [inline] do_rmdir+0x334/0x3c0 fs/namei.c:3968 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #0 (&ovl_i_mutex_dir_key[depth]#2){++++}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_read+0x36/0x80 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:729 [inline] do_last fs/namei.c:3333 [inline] path_openat+0x149b/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_open_execat+0xd3/0x450 fs/exec.c:849 do_execveat_common+0x711/0x1f30 fs/exec.c:1755 do_execve fs/exec.c:1860 [inline] SYSC_execve fs/exec.c:1941 [inline] SyS_execve+0x3b/0x50 fs/exec.c:1936 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb other info that might help us debug this: Chain exists of: &ovl_i_mutex_dir_key[depth]#2 --> &p->lock --> &sig->cred_guard_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sig->cred_guard_mutex); lock(&p->lock); lock(&sig->cred_guard_mutex); lock(&ovl_i_mutex_dir_key[depth]#2); *** DEADLOCK *** 1 lock held by syz-executor.1/18509: #0: (&sig->cred_guard_mutex){+.+.}, at: [] prepare_bprm_creds fs/exec.c:1404 [inline] #0: (&sig->cred_guard_mutex){+.+.}, at: [] do_execveat_common+0x319/0x1f30 fs/exec.c:1748 stack backtrace: CPU: 0 PID: 18509 Comm: syz-executor.1 Not tainted 4.14.218-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+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_read+0x36/0x80 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:729 [inline] do_last fs/namei.c:3333 [inline] path_openat+0x149b/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_open_execat+0xd3/0x450 fs/exec.c:849 do_execveat_common+0x711/0x1f30 fs/exec.c:1755 do_execve fs/exec.c:1860 [inline] SYSC_execve fs/exec.c:1941 [inline] SyS_execve+0x3b/0x50 fs/exec.c:1936 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007f409fd06188 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000020000800 RSI: 0000000020000580 RDI: 0000000020000400 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fffe7e567ef R14: 00007f409fd06300 R15: 0000000000022000 IPv6: sit1: Disabled Multicast RS audit: type=1804 audit(1612181933.660:213): pid=18556 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir482092237/syzkaller.SRcj8t/180/bus" dev="sda1" ino=15879 res=1 overlayfs: fs on './file0' does not support file handles, falling back to index=off. tmpfs: Bad value '00000000000000060928' for mount option 'uid' overlayfs: fs on '.' does not support file handles, falling back to index=off. overlayfs: filesystem on './bus' not supported as upperdir overlayfs: 'file0' not a directory netlink: 14 bytes leftover after parsing attributes in process `syz-executor.1'. batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Interface activated: team0 netlink: 14 bytes leftover after parsing attributes in process `syz-executor.1'. audit: type=1800 audit(1612181935.700:214): pid=18603 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="bus" dev="sda1" ino=15913 res=0 audit: type=1800 audit(1612181935.730:215): pid=18604 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="bus" dev="sda1" ino=15913 res=0 print_req_error: 80 callbacks suppressed print_req_error: I/O error, dev loop4, sector 0 print_req_error: I/O error, dev loop4, sector 0 buffer_io_error: 71 callbacks suppressed Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read Buffer I/O error on dev loop4p2, logical block 0, async page read FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 18842 Comm: syz-executor.4 Not tainted 4.14.218-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+0x1b2/0x281 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x149 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+0x29a/0x3d0 mm/slab.c:3616 kmalloc include/linux/slab.h:488 [inline] kzalloc include/linux/slab.h:661 [inline] snd_mixer_oss_put_volume1_vol.constprop.0.isra.0+0x8c/0x3d0 sound/core/oss/mixer_oss.c:642 snd_mixer_oss_put_volume1+0x80a/0xc20 sound/core/oss/mixer_oss.c:723 snd_mixer_oss_set_volume sound/core/oss/mixer_oss.c:304 [inline] snd_mixer_oss_ioctl1+0x48b/0x1620 sound/core/oss/mixer_oss.c:367 snd_mixer_oss_ioctl+0x40/0x50 sound/core/oss/mixer_oss.c:382 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007f6ff78ec188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000020000080 RSI: 0000000040045506 RDI: 0000000000000004 RBP: 00007f6ff78ec1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffce98a334f R14: 00007f6ff78ec300 R15: 0000000000022000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 18847 Comm: syz-executor.4 Not tainted 4.14.218-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+0x1b2/0x281 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x149 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+0x29a/0x3d0 mm/slab.c:3616 kmalloc include/linux/slab.h:488 [inline] kzalloc include/linux/slab.h:661 [inline] snd_mixer_oss_put_volume1_vol.constprop.0.isra.0+0xc4/0x3d0 sound/core/oss/mixer_oss.c:643 snd_mixer_oss_put_volume1+0x80a/0xc20 sound/core/oss/mixer_oss.c:723 snd_mixer_oss_set_volume sound/core/oss/mixer_oss.c:304 [inline] snd_mixer_oss_ioctl1+0x48b/0x1620 sound/core/oss/mixer_oss.c:367 snd_mixer_oss_ioctl+0x40/0x50 sound/core/oss/mixer_oss.c:382 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007f6ff78ec188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000020000080 RSI: 0000000040045506 RDI: 0000000000000004 RBP: 00007f6ff78ec1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffce98a334f R14: 00007f6ff78ec300 R15: 0000000000022000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 18852 Comm: syz-executor.4 Not tainted 4.14.218-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+0x1b2/0x281 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x149 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+0x29a/0x3d0 mm/slab.c:3616 kmalloc include/linux/slab.h:488 [inline] kzalloc include/linux/slab.h:661 [inline] snd_mixer_oss_put_volume1_sw.constprop.0.isra.0+0x91/0x390 sound/core/oss/mixer_oss.c:683 snd_mixer_oss_put_volume1+0x3f7/0xc20 sound/core/oss/mixer_oss.c:746 snd_mixer_oss_set_volume sound/core/oss/mixer_oss.c:304 [inline] snd_mixer_oss_ioctl1+0x48b/0x1620 sound/core/oss/mixer_oss.c:367 snd_mixer_oss_ioctl+0x40/0x50 sound/core/oss/mixer_oss.c:382 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007f6ff78ec188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000020000080 RSI: 0000000040045506 RDI: 0000000000000004 RBP: 00007f6ff78ec1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffce98a334f R14: 00007f6ff78ec300 R15: 0000000000022000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 18866 Comm: syz-executor.4 Not tainted 4.14.218-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+0x1b2/0x281 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x149 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+0x29a/0x3d0 mm/slab.c:3616 kmalloc include/linux/slab.h:488 [inline] kzalloc include/linux/slab.h:661 [inline] snd_mixer_oss_put_volume1_sw.constprop.0.isra.0+0xc9/0x390 sound/core/oss/mixer_oss.c:684 snd_mixer_oss_put_volume1+0x3f7/0xc20 sound/core/oss/mixer_oss.c:746 snd_mixer_oss_set_volume sound/core/oss/mixer_oss.c:304 [inline] snd_mixer_oss_ioctl1+0x48b/0x1620 sound/core/oss/mixer_oss.c:367 snd_mixer_oss_ioctl+0x40/0x50 sound/core/oss/mixer_oss.c:382 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007f6ff78ec188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000020000080 RSI: 0000000040045506 RDI: 0000000000000004 RBP: 00007f6ff78ec1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffce98a334f R14: 00007f6ff78ec300 R15: 0000000000022000 print_req_error: 430 callbacks suppressed print_req_error: I/O error, dev loop4, sector 0 print_req_error: I/O error, dev loop4, sector 0 buffer_io_error: 386 callbacks suppressed Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4p2, logical block 0, async page read Buffer I/O error on dev loop4p2, logical block 0, async page read binder: 18980:18985 unknown command -2128033916 binder: 18980:18985 ioctl c0306201 20000100 returned -22 binder: 18980:18985 unknown command -2128033916 binder: 18980:18985 ioctl c0306201 20000100 returned -22