A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. overlayfs: unrecognized mount option "lowerKir=.:file0]Î}--" or missing value ====================================================== WARNING: possible circular locking dependency detected 4.14.232-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/19254 is trying to acquire lock: (&sig->cred_guard_mutex){+.+.}, at: [] do_io_accounting fs/proc/base.c:2725 [inline] (&sig->cred_guard_mutex){+.+.}, at: [] proc_tgid_io_accounting+0x1b9/0x7a0 fs/proc/base.c:2774 but task is already holding lock: (&p->lock){+.+.}, at: [] seq_read+0xba/0x1120 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+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 -> #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+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_setattr+0x52/0x500 fs/overlayfs/inode.c:38 notify_change+0x56b/0xd10 fs/attr.c:313 chown_common+0x40b/0x4b0 fs/open.c:631 SYSC_fchownat fs/open.c:661 [inline] SyS_fchownat+0xf6/0x190 fs/open.c:641 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #1 (&ovl_i_mutex_dir_key[depth]){++++}: 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 -> #0 (&sig->cred_guard_mutex){+.+.}: 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 do_io_accounting fs/proc/base.c:2725 [inline] proc_tgid_io_accounting+0x1b9/0x7a0 fs/proc/base.c:2774 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 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.5/19254: #0: (&p->lock){+.+.}, at: [] seq_read+0xba/0x1120 fs/seq_file.c:165 stack backtrace: CPU: 0 PID: 19254 Comm: syz-executor.5 Not tainted 4.14.232-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 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 do_io_accounting fs/proc/base.c:2725 [inline] proc_tgid_io_accounting+0x1b9/0x7a0 fs/proc/base.c:2774 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 RIP: 0033:0x4665f9 RSP: 002b:00007fee76426188 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 00000000004665f9 RDX: 0000000000000002 RSI: 0000000020000680 RDI: 0000000000000005 RBP: 00000000004bfce1 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffeee986aaf R14: 00007fee76426300 R15: 0000000000022000 netlink: 934 bytes leftover after parsing attributes in process `syz-executor.4'. overlayfs: unrecognized mount option "uãäGerdir=./š" or missing value A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. netlink: 36646 bytes leftover after parsing attributes in process `syz-executor.1'. A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 overlayfs: unrecognized mount option "lowerKir=.:file0]Î}--" or missing value netlink: 934 bytes leftover after parsing attributes in process `syz-executor.4'. CPU: 0 PID: 19284 Comm: syz-executor.3 Not tainted 4.14.232-syzkaller #0 A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. 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 netlink: 36646 bytes leftover after parsing attributes in process `syz-executor.1'. 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_node mm/slab.c:3297 [inline] kmem_cache_alloc_node_trace+0x25a/0x400 mm/slab.c:3659 kmalloc_node include/linux/slab.h:526 [inline] kzalloc_node include/linux/slab.h:672 [inline] __get_vm_area_node+0xed/0x340 mm/vmalloc.c:1407 __vmalloc_node_range mm/vmalloc.c:1762 [inline] __vmalloc_node mm/vmalloc.c:1818 [inline] __vmalloc_node_flags mm/vmalloc.c:1832 [inline] vmalloc+0x98/0x150 mm/vmalloc.c:1854 netlink_alloc_large_skb net/netlink/af_netlink.c:1164 [inline] netlink_sendmsg+0x41a/0xb80 net/netlink/af_netlink.c:1853 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 sock_no_sendpage+0xe2/0x110 net/core/sock.c:2595 kernel_sendpage net/socket.c:3407 [inline] sock_sendpage+0xdf/0x140 net/socket.c:871 pipe_to_sendpage+0x226/0x2d0 fs/splice.c:451 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x326/0x7a0 fs/splice.c:626 A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. splice_from_pipe fs/splice.c:661 [inline] generic_splice_sendpage+0xc1/0x110 fs/splice.c:832 do_splice_from fs/splice.c:851 [inline] do_splice fs/splice.c:1147 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0xd59/0x1380 fs/splice.c:1382 overlayfs: unrecognized mount option "uãäGerdir=./š" or missing value do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4665f9 RSP: 002b:00007f10c429d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f10c429d1d0 R08: 000000007fffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fffb69be12f R14: 00007f10c429d300 R15: 0000000000022000 syz-executor.3: vmalloc: allocation failure: 4416 bytes, mode:0x14000c0(GFP_KERNEL), nodemask=(null) syz-executor.3 cpuset=/ mems_allowed=0-1 A link change request failed with some changes committed already. Interface bridge3 may have been left with an inconsistent configuration, please check. overlayfs: unrecognized mount option "lowerKir=.:file0]Î}--" or missing value CPU: 0 PID: 19284 Comm: syz-executor.3 Not tainted 4.14.232-syzkaller #0 A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. 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 warn_alloc.cold+0x96/0x1cc mm/page_alloc.c:3255 __vmalloc_node_range mm/vmalloc.c:1789 [inline] __vmalloc_node mm/vmalloc.c:1818 [inline] __vmalloc_node_flags mm/vmalloc.c:1832 [inline] vmalloc+0x122/0x150 mm/vmalloc.c:1854 netlink_alloc_large_skb net/netlink/af_netlink.c:1164 [inline] netlink_sendmsg+0x41a/0xb80 net/netlink/af_netlink.c:1853 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 sock_no_sendpage+0xe2/0x110 net/core/sock.c:2595 kernel_sendpage net/socket.c:3407 [inline] sock_sendpage+0xdf/0x140 net/socket.c:871 A link change request failed with some changes committed already. Interface bridge3 may have been left with an inconsistent configuration, please check. pipe_to_sendpage+0x226/0x2d0 fs/splice.c:451 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x326/0x7a0 fs/splice.c:626 splice_from_pipe fs/splice.c:661 [inline] generic_splice_sendpage+0xc1/0x110 fs/splice.c:832 do_splice_from fs/splice.c:851 [inline] do_splice fs/splice.c:1147 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0xd59/0x1380 fs/splice.c:1382 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4665f9 RSP: 002b:00007f10c429d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f10c429d1d0 R08: 000000007fffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fffb69be12f R14: 00007f10c429d300 R15: 0000000000022000 Mem-Info: active_anon:269813 inactive_anon:15288 isolated_anon:0 active_file:16415 inactive_file:36379 isolated_file:0 unevictable:6156 dirty:149 writeback:0 unstable:0 slab_reclaimable:17726 slab_unreclaimable:125125 mapped:60673 shmem:4883 pagetables:2689 bounce:0 free:1145587 free_pcp:188 free_cma:0 Node 0 active_anon:1079252kB inactive_anon:61152kB active_file:65540kB inactive_file:145520kB unevictable:24624kB isolated(anon):0kB isolated(file):0kB mapped:242700kB dirty:600kB writeback:0kB shmem:19532kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 1091584kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no Node 1 active_anon:0kB inactive_anon:0kB active_file:120kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no Node 0 DMA free:15908kB min:204kB low:252kB high:300kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 2717 2718 2718 2718 Node 0 DMA32 free:528796kB min:36200kB low:45248kB high:54296kB active_anon:1079252kB inactive_anon:61152kB active_file:65540kB inactive_file:145520kB unevictable:24624kB writepending:608kB present:3129332kB managed:2788128kB mlocked:24624kB kernel_stack:9472kB pagetables:10756kB bounce:0kB free_pcp:780kB local_pcp:108kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 0 Normal free:0kB min:4kB low:4kB high:4kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:516kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 1 Normal free:4039716kB min:53696kB low:67120kB high:80544kB active_anon:0kB inactive_anon:0kB active_file:120kB inactive_file:0kB unevictable:0kB writepending:0kB present:4194304kB managed:4128256kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB Node 0 DMA32: 979*4kB (UME) 257*8kB (UME) 149*16kB (UME) 391*32kB (UME) 592*64kB (UM) 130*128kB (UME) 64*256kB (UM) 35*512kB (UM) 11*1024kB (UME) 7*2048kB (UM) 96*4096kB (UM) = 528516kB Node 0 Normal: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 0kB Node 1 Normal: 73*4kB (UE) 361*8kB (UME) 282*16kB (UM) 83*32kB (UME) 31*64kB (UM) 16*128kB (UME) 12*256kB (UM) 4*512kB (UE) 2*1024kB (ME) 4*2048kB (UM) 979*4096kB (M) = 4039724kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 0 hugepages_total=3 hugepages_free=2 hugepages_surp=3 hugepages_size=2048kB Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 35451 total pagecache pages 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB 2097051 pages RAM 0 pages HighMem/MovableOnly 363849 pages reserved 0 pages cma reserved A link change request failed with some changes committed already. Interface bridge3 may have been left with an inconsistent configuration, please check. overlayfs: unrecognized mount option "lowerKir=.:file0]Î}--" or missing value A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface bridge3 may have been left with an inconsistent configuration, please check. overlayfs: unrecognized mount option "lowerKir=.:file0]Î}--" or missing value nla_parse: 24 callbacks suppressed netlink: 37422 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 36646 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 36646 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 36646 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 41498 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 41498 bytes leftover after parsing attributes in process `syz-executor.1'. net_ratelimit: 10 callbacks suppressed A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface bridge0 may have been left with an inconsistent configuration, please check. nla_parse: 31 callbacks suppressed netlink: 42910 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 36410 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 41558 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 41558 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 42910 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 41558 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 42910 bytes leftover after parsing attributes in process `syz-executor.4'.