kvm [875]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000042 data 0xfffe bridge0: port 3(team0) entered disabled state ====================================================== WARNING: possible circular locking dependency detected device team0 entered promiscuous mode 4.14.213-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/878 is trying to acquire lock: (&p->lock){+.+.}, at: [] seq_read+0xba/0x1120 fs/seq_file.c:165 but task is already holding lock: (sb_writers#6){.+.+}, at: [] file_start_write include/linux/fs.h:2712 [inline] (sb_writers#6){.+.+}, at: [] do_sendfile+0x84f/0xb30 fs/read_write.c:1440 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (sb_writers#6){.+.+}: 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_create_object+0x75/0x1d0 fs/overlayfs/dir.c:538 lookup_open+0x77a/0x1750 fs/namei.c:3241 kvm [875]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x4000006f data 0xff13 do_last fs/namei.c:3334 [inline] path_openat+0xe08/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 device team_slave_0 entered promiscuous mode entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #2 ( kvm [875]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000006 data 0xff87 &ovl_i_mutex_dir_key[depth]#2){++++}: 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 device team_slave_1 entered promiscuous mode 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 -> #1 (&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 bridge0: port 3(team0) entered blocking state entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #0 (&p->lock){+.+.} bridge0: port 3(team0) entered forwarding state : kvm [875]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x4000004d data 0xff53 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __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 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 kvm [875]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x4000004d data 0xff19 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 other info that might help us debug this: kvm [875]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000042 data 0xff3b Chain exists of: &p->lock --> &ovl_i_mutex_dir_key[depth]#2 --> sb_writers#6 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_writers kvm [875]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000045 data 0xff82 #6); lock(&ovl_i_mutex_dir_key[depth]#2); lock(sb_writers#6); lock(&p->lock); *** DEADLOCK *** 1 lock held by syz-executor.4/878: device team0 left promiscuous mode #0: (sb_writers#6){.+.+}, at: [] file_start_write include/linux/fs.h:2712 [inline] #0: (sb_writers#6){.+.+}, at: [] do_sendfile+0x84f/0xb30 fs/read_write.c:1440 stack backtrace: device team_slave_0 left promiscuous mode CPU: 1 PID: 878 Comm: syz-executor.4 Not tainted 4.14.213-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+0x1b2/0x283 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 device team_slave_1 left promiscuous mode 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 bridge0: port 3(team0) entered disabled state lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __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 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 RIP: 0033:0x45e219 RSP: 002b:00007fbd9e9b8c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004 RBP: 000000000119bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000100000002 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffdf1e686bf R14: 00007fbd9e9b99c0 R15: 000000000119bf8c team0: Cannot enslave team device to itself overlayfs: failed to resolve './file1': -2 overlayfs: failed to resolve './file1': -2 overlayfs: failed to resolve './file1': -2 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 957 Comm: syz-executor.1 Not tainted 4.14.213-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 overlayfs: failed to resolve './file1': -2 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x154 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] ovl_cache_get fs/overlayfs/readdir.c:399 [inline] ovl_iterate+0x574/0xbc0 fs/overlayfs/readdir.c:704 iterate_dir+0x478/0x5e0 fs/readdir.c:54 SYSC_getdents fs/readdir.c:269 [inline] SyS_getdents+0x125/0x240 fs/readdir.c:250 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fa57032bc68 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 000000000045e219 RDX: 0000000000009004 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007fa57032bca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffff63e97ef R14: 00007fa57032c9c0 R15: 000000000119bf8c overlayfs: failed to resolve './file1': -2 overlayfs: failed to resolve './file1': -2 IPVS: ftp: loaded support on port[0] = 21 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 1023 Comm: syz-executor.1 Not tainted 4.14.213-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+0x1b2/0x283 lib/dump_stack.c:58 IPVS: ftp: loaded support on port[0] = 21 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x154 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+0x28e/0x3c0 mm/slab.c:3550 kmem_cache_zalloc include/linux/slab.h:651 [inline] get_empty_filp+0x86/0x3e0 fs/file_table.c:123 dentry_open+0x5a/0x210 fs/open.c:902 ovl_dir_read fs/overlayfs/readdir.c:297 [inline] ovl_dir_read_merged+0xdb/0x430 fs/overlayfs/readdir.c:355 ovl_cache_get fs/overlayfs/readdir.c:407 [inline] ovl_iterate+0x624/0xbc0 fs/overlayfs/readdir.c:704 iterate_dir+0x478/0x5e0 fs/readdir.c:54 SYSC_getdents fs/readdir.c:269 [inline] SyS_getdents+0x125/0x240 fs/readdir.c:250 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fa57032bc68 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 000000000045e219 RDX: 0000000000009004 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007fa57032bca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffff63e97ef R14: 00007fa57032c9c0 R15: 000000000119bf8c netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. overlayfs: failed to resolve './file0': -2 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve './file0': -2 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 1106 Comm: syz-executor.1 Not tainted 4.14.213-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+0x1b2/0x283 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x154 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] aa_alloc_file_ctx security/apparmor/include/file.h:60 [inline] apparmor_file_alloc_security+0x129/0x800 security/apparmor/lsm.c:431 security_file_alloc+0x66/0xa0 security/security.c:874 get_empty_filp+0x15c/0x3e0 fs/file_table.c:129 dentry_open+0x5a/0x210 fs/open.c:902 ovl_dir_read fs/overlayfs/readdir.c:297 [inline] ovl_dir_read_merged+0xdb/0x430 fs/overlayfs/readdir.c:355 ovl_cache_get fs/overlayfs/readdir.c:407 [inline] ovl_iterate+0x624/0xbc0 fs/overlayfs/readdir.c:704 iterate_dir+0x478/0x5e0 fs/readdir.c:54 SYSC_getdents fs/readdir.c:269 [inline] SyS_getdents+0x125/0x240 fs/readdir.c:250 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fa57032bc68 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 000000000045e219 RDX: 0000000000009004 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007fa57032bca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffff63e97ef R14: 00007fa57032c9c0 R15: 000000000119bf8c FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 1140 Comm: syz-executor.1 Not tainted 4.14.213-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+0x1b2/0x283 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x154 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] ext4_htree_create_dir_info fs/ext4/dir.c:419 [inline] ext4_dx_readdir fs/ext4/dir.c:538 [inline] ext4_readdir+0x1758/0x27e0 fs/ext4/dir.c:124 iterate_dir+0x1a0/0x5e0 fs/readdir.c:52 ovl_dir_read fs/overlayfs/readdir.c:306 [inline] ovl_dir_read_merged+0x14a/0x430 fs/overlayfs/readdir.c:355 ovl_cache_get fs/overlayfs/readdir.c:407 [inline] ovl_iterate+0x624/0xbc0 fs/overlayfs/readdir.c:704 iterate_dir+0x478/0x5e0 fs/readdir.c:54 SYSC_getdents fs/readdir.c:269 [inline] SyS_getdents+0x125/0x240 fs/readdir.c:250 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fa57032bc68 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 000000000045e219 RDX: 0000000000009004 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007fa57032bca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00007ffff63e97ef R14: 00007fa57032c9c0 R15: 000000000119bf8c netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. overlayfs: missing 'lowerdir' netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. overlayfs: missing 'lowerdir' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 xt_TPROXY: Can be used only in combination with either -p tcp or -p udp CPU: 1 PID: 1178 Comm: syz-executor.1 Not tainted 4.14.213-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+0x1b2/0x283 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x154 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+0x2c1/0x400 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] kzalloc include/linux/slab.h:661 [inline] ext4_htree_store_dirent+0x87/0x620 fs/ext4/dir.c:455 htree_dirblock_to_tree+0x246/0x520 fs/ext4/namei.c:1036 ext4_htree_fill_tree+0x202/0xa50 fs/ext4/namei.c:1113 ext4_dx_readdir fs/ext4/dir.c:579 [inline] ext4_readdir+0x11d5/0x27e0 fs/ext4/dir.c:124 iterate_dir+0x1a0/0x5e0 fs/readdir.c:52 ovl_dir_read fs/overlayfs/readdir.c:306 [inline] ovl_dir_read_merged+0x14a/0x430 fs/overlayfs/readdir.c:355 ovl_cache_get fs/overlayfs/readdir.c:407 [inline] ovl_iterate+0x624/0xbc0 fs/overlayfs/readdir.c:704 iterate_dir+0x478/0x5e0 fs/readdir.c:54 SYSC_getdents fs/readdir.c:269 [inline] SyS_getdents+0x125/0x240 fs/readdir.c:250 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fa57032bc68 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 000000000045e219 RDX: 0000000000009004 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007fa57032bca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 00007ffff63e97ef R14: 00007fa57032c9c0 R15: 000000000119bf8c xt_TPROXY: Can be used only in combination with either -p tcp or -p udp overlayfs: missing 'lowerdir' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 1206 Comm: syz-executor.1 Not tainted 4.14.213-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+0x1b2/0x283 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x154 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+0x2c1/0x400 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] kzalloc include/linux/slab.h:661 [inline] ext4_htree_store_dirent+0x87/0x620 fs/ext4/dir.c:455 htree_dirblock_to_tree+0x246/0x520 fs/ext4/namei.c:1036 ext4_htree_fill_tree+0x202/0xa50 fs/ext4/namei.c:1113 ext4_dx_readdir fs/ext4/dir.c:579 [inline] ext4_readdir+0x11d5/0x27e0 fs/ext4/dir.c:124 iterate_dir+0x1a0/0x5e0 fs/readdir.c:52 ovl_dir_read fs/overlayfs/readdir.c:306 [inline] ovl_dir_read_merged+0x14a/0x430 fs/overlayfs/readdir.c:355 ovl_cache_get fs/overlayfs/readdir.c:407 [inline] ovl_iterate+0x624/0xbc0 fs/overlayfs/readdir.c:704 iterate_dir+0x478/0x5e0 fs/readdir.c:54 SYSC_getdents fs/readdir.c:269 [inline] SyS_getdents+0x125/0x240 fs/readdir.c:250 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fa57032bc68 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 000000000045e219 RDX: 0000000000009004 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007fa57032bca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00007ffff63e97ef R14: 00007fa57032c9c0 R15: 000000000119bf8c netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. overlayfs: unrecognized mount option "./bus" or missing value overlayfs: unrecognized mount option "./bus" or missing value FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. CPU: 1 PID: 1243 Comm: syz-executor.1 Not tainted 4.14.213-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+0x1b2/0x283 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x154 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+0x2c1/0x400 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] kzalloc include/linux/slab.h:661 [inline] ext4_htree_store_dirent+0x87/0x620 fs/ext4/dir.c:455 htree_dirblock_to_tree+0x246/0x520 fs/ext4/namei.c:1036 ext4_htree_fill_tree+0x202/0xa50 fs/ext4/namei.c:1113 ext4_dx_readdir fs/ext4/dir.c:579 [inline] ext4_readdir+0x11d5/0x27e0 fs/ext4/dir.c:124 iterate_dir+0x1a0/0x5e0 fs/readdir.c:52 ovl_dir_read fs/overlayfs/readdir.c:306 [inline] ovl_dir_read_merged+0x14a/0x430 fs/overlayfs/readdir.c:355 ovl_cache_get fs/overlayfs/readdir.c:407 [inline] ovl_iterate+0x624/0xbc0 fs/overlayfs/readdir.c:704 iterate_dir+0x478/0x5e0 fs/readdir.c:54 SYSC_getdents fs/readdir.c:269 [inline] SyS_getdents+0x125/0x240 fs/readdir.c:250 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fa57032bc68 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 000000000045e219 RDX: 0000000000009004 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007fa57032bca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 R13: 00007ffff63e97ef R14: 00007fa57032c9c0 R15: 000000000119bf8c overlayfs: unrecognized mount option "./bus" or missing value netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. ip6_tables: ip6tables: counters copy to user failed while replacing table overlayfs: unrecognized mount option "./bus" or missing value ip6_tables: ip6tables: counters copy to user failed while replacing table netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. overlayfs: unrecognized mount option "./bus" or missing value netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 1314 Comm: syz-executor.1 Not tainted 4.14.213-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+0x1b2/0x283 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x154 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+0x2c1/0x400 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] ovl_cache_entry_new+0x36/0x350 fs/overlayfs/readdir.c:148 ovl_cache_entry_add_rb fs/overlayfs/readdir.c:181 [inline] ovl_fill_merge+0x59b/0xa50 fs/overlayfs/readdir.c:259 dir_emit include/linux/fs.h:3355 [inline] call_filldir+0x332/0x5e0 fs/ext4/dir.c:518 ext4_dx_readdir fs/ext4/dir.c:594 [inline] ext4_readdir+0x1cc8/0x27e0 fs/ext4/dir.c:124 iterate_dir+0x1a0/0x5e0 fs/readdir.c:52 ovl_dir_read fs/overlayfs/readdir.c:306 [inline] ovl_dir_read_merged+0x14a/0x430 fs/overlayfs/readdir.c:355 ovl_cache_get fs/overlayfs/readdir.c:407 [inline] ovl_iterate+0x624/0xbc0 fs/overlayfs/readdir.c:704 iterate_dir+0x478/0x5e0 fs/readdir.c:54 SYSC_getdents fs/readdir.c:269 [inline] SyS_getdents+0x125/0x240 fs/readdir.c:250 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fa57032bc68 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 000000000045e219 RDX: 0000000000009004 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007fa57032bca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000007 R13: 00007ffff63e97ef R14: 00007fa57032c9c0 R15: 000000000119bf8c overlayfs: unrecognized mount option "./bus" or missing value FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 1341 Comm: syz-executor.1 Not tainted 4.14.213-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+0x1b2/0x283 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x154 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+0x2c1/0x400 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] ovl_cache_entry_new+0x36/0x350 fs/overlayfs/readdir.c:148 ovl_cache_entry_add_rb fs/overlayfs/readdir.c:181 [inline] ovl_fill_merge+0x59b/0xa50 fs/overlayfs/readdir.c:259 dir_emit include/linux/fs.h:3355 [inline] call_filldir+0x332/0x5e0 fs/ext4/dir.c:518 ext4_dx_readdir fs/ext4/dir.c:594 [inline] ext4_readdir+0x1cc8/0x27e0 fs/ext4/dir.c:124 iterate_dir+0x1a0/0x5e0 fs/readdir.c:52 ovl_dir_read fs/overlayfs/readdir.c:306 [inline] ovl_dir_read_merged+0x14a/0x430 fs/overlayfs/readdir.c:355 ovl_cache_get fs/overlayfs/readdir.c:407 [inline] ovl_iterate+0x624/0xbc0 fs/overlayfs/readdir.c:704 iterate_dir+0x478/0x5e0 fs/readdir.c:54 SYSC_getdents fs/readdir.c:269 [inline] SyS_getdents+0x125/0x240 fs/readdir.c:250 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fa57032bc68 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 000000000045e219 RDX: 0000000000009004 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007fa57032bca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 R13: 00007ffff63e97ef R14: 00007fa57032c9c0 R15: 000000000119bf8c overlayfs: option "workdir=." is useless in a non-upper mount, ignore overlayfs: at least 2 lowerdir are needed while upperdir nonexistent netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. overlayfs: option "workdir=." is useless in a non-upper mount, ignore overlayfs: at least 2 lowerdir are needed while upperdir nonexistent netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. overlayfs: option "workdir=." is useless in a non-upper mount, ignore netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. overlayfs: at least 2 lowerdir are needed while upperdir nonexistent FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 1413 Comm: syz-executor.1 Not tainted 4.14.213-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+0x1b2/0x283 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x154 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+0x2c1/0x400 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] ovl_cache_entry_new+0x36/0x350 fs/overlayfs/readdir.c:148 ovl_cache_entry_add_rb fs/overlayfs/readdir.c:181 [inline] ovl_fill_merge+0x59b/0xa50 fs/overlayfs/readdir.c:259 dir_emit include/linux/fs.h:3355 [inline] call_filldir+0x332/0x5e0 fs/ext4/dir.c:518 ext4_dx_readdir fs/ext4/dir.c:594 [inline] ext4_readdir+0x1cc8/0x27e0 fs/ext4/dir.c:124 iterate_dir+0x1a0/0x5e0 fs/readdir.c:52 ovl_dir_read fs/overlayfs/readdir.c:306 [inline] ovl_dir_read_merged+0x14a/0x430 fs/overlayfs/readdir.c:355 ovl_cache_get fs/overlayfs/readdir.c:407 [inline] ovl_iterate+0x624/0xbc0 fs/overlayfs/readdir.c:704 iterate_dir+0x478/0x5e0 fs/readdir.c:54 SYSC_getdents fs/readdir.c:269 [inline] SyS_getdents+0x125/0x240 fs/readdir.c:250 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fa57032bc68 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 000000000045e219 RDX: 0000000000009004 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007fa57032bca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000009 R13: 00007ffff63e97ef R14: 00007fa57032c9c0 R15: 000000000119bf8c overlayfs: unrecognized mount option "upper" or missing value overlayfs: unrecognized mount option "upper" or missing value FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 1445 Comm: syz-executor.1 Not tainted 4.14.213-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+0x1b2/0x283 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x154 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+0x28e/0x3c0 mm/slab.c:3550 kmem_cache_zalloc include/linux/slab.h:651 [inline] get_empty_filp+0x86/0x3e0 fs/file_table.c:123 dentry_open+0x5a/0x210 fs/open.c:902 ovl_dir_read fs/overlayfs/readdir.c:297 [inline] ovl_dir_read_merged+0x251/0x430 fs/overlayfs/readdir.c:365 ovl_cache_get fs/overlayfs/readdir.c:407 [inline] ovl_iterate+0x624/0xbc0 fs/overlayfs/readdir.c:704 iterate_dir+0x478/0x5e0 fs/readdir.c:54 SYSC_getdents fs/readdir.c:269 [inline] SyS_getdents+0x125/0x240 fs/readdir.c:250 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fa57032bc68 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 000000000045e219 RDX: 0000000000009004 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007fa57032bca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000a R13: 00007ffff63e97ef R14: 00007fa57032c9c0 R15: 000000000119bf8c overlayfs: unrecognized mount option "upper" or missing value FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 overlayfs: workdir and upperdir must be separate subtrees CPU: 0 PID: 1471 Comm: syz-executor.1 Not tainted 4.14.213-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+0x1b2/0x283 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x154 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] aa_alloc_file_ctx security/apparmor/include/file.h:60 [inline] apparmor_file_alloc_security+0x129/0x800 security/apparmor/lsm.c:431 security_file_alloc+0x66/0xa0 security/security.c:874 get_empty_filp+0x15c/0x3e0 fs/file_table.c:129 dentry_open+0x5a/0x210 fs/open.c:902 ovl_dir_read fs/overlayfs/readdir.c:297 [inline] ovl_dir_read_merged+0x251/0x430 fs/overlayfs/readdir.c:365 ovl_cache_get fs/overlayfs/readdir.c:407 [inline] ovl_iterate+0x624/0xbc0 fs/overlayfs/readdir.c:704 iterate_dir+0x478/0x5e0 fs/readdir.c:54 SYSC_getdents fs/readdir.c:269 [inline] SyS_getdents+0x125/0x240 fs/readdir.c:250 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fa57032bc68 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 000000000045e219 RDX: 0000000000009004 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007fa57032bca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000b R13: 00007ffff63e97ef R14: 00007fa57032c9c0 R15: 000000000119bf8c overlayfs: workdir and upperdir must be separate subtrees FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 1514 Comm: syz-executor.1 Not tainted 4.14.213-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+0x1b2/0x283 lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x154 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] ext4_htree_create_dir_info fs/ext4/dir.c:419 [inline] ext4_dx_readdir fs/ext4/dir.c:538 [inline] ext4_readdir+0x1758/0x27e0 fs/ext4/dir.c:124