syz-executor.2: vmalloc: allocation failure: 17179869200 bytes, mode:0x14080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null) ====================================================== WARNING: possible circular locking dependency detected 4.14.217-syzkaller #0 Not tainted syz-executor.2 cpuset= ------------------------------------------------------ syz-executor.1/10183 is trying to acquire lock: (&oi->lock){+.+.}, at: [] ovl_copy_up_start+0x40/0xe0 fs/overlayfs/util.c:318 but task is already holding lock: (sb_writers#3){.+.+}, at: [] sb_start_write include/linux/fs.h:1549 [inline] (sb_writers#3){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 which lock already depends on the new lock. / the existing dependency chain (in reverse order) is: mems_allowed=0-1 -> #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_xattr_set+0x4d/0x270 fs/overlayfs/inode.c:214 ovl_posix_acl_xattr_set+0x2b7/0x830 fs/overlayfs/super.c:762 CPU: 1 PID: 10180 Comm: syz-executor.2 Not tainted 4.14.217-syzkaller #0 __vfs_setxattr+0xdc/0x130 fs/xattr.c:150 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 __vfs_setxattr_noperm+0xfd/0x3d0 fs/xattr.c:181 Call Trace: __vfs_setxattr_locked+0x14d/0x250 fs/xattr.c:239 __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 vfs_setxattr+0xcf/0x230 fs/xattr.c:256 setxattr+0x1a9/0x300 fs/xattr.c:523 warn_alloc.cold+0x96/0x1cc mm/page_alloc.c:3255 path_setxattr+0x118/0x130 fs/xattr.c:542 SYSC_lsetxattr fs/xattr.c:564 [inline] SyS_lsetxattr+0x33/0x40 fs/xattr.c:560 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #1 __vmalloc_node_range mm/vmalloc.c:1789 [inline] __vmalloc_node mm/vmalloc.c:1818 [inline] __vmalloc_node_flags mm/vmalloc.c:1832 [inline] vzalloc+0x122/0x150 mm/vmalloc.c:1871 ( ip_set_alloc+0x7d/0xc0 net/netfilter/ipset/ip_set_core.c:261 &ovl_i_mutex_dir_key[depth] hash_mac_create+0x346/0x9d0 net/netfilter/ipset/ip_set_hash_gen.h:1293 #2 ip_set_create+0x600/0xfd0 net/netfilter/ipset/ip_set_core.c:911 ){++++}: down_read+0x36/0x80 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:729 [inline] lookup_slow+0x129/0x400 fs/namei.c:1674 lookup_one_len_unlocked+0x3a0/0x410 fs/namei.c:2595 ovl_lower_positive+0x184/0x350 fs/overlayfs/namei.c:783 nfnetlink_rcv_msg+0x9bb/0xc00 net/netfilter/nfnetlink.c:214 ovl_rename+0x47c/0xf10 fs/overlayfs/dir.c:968 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433 vfs_rename+0x560/0x1820 fs/namei.c:4496 SYSC_renameat2 fs/namei.c:4644 [inline] SyS_renameat2+0x95b/0xad0 fs/namei.c:4533 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #0 nfnetlink_rcv+0x1ab/0x1da0 net/netfilter/nfnetlink.c:515 ( &oi->lock ){+.+.} : 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 ovl_copy_up_start+0x40/0xe0 fs/overlayfs/util.c:318 ovl_copy_up_one+0x21f/0x910 fs/overlayfs/copy_up.c:630 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313 ovl_copy_up_flags+0xd5/0x120 fs/overlayfs/copy_up.c:685 ovl_xattr_set+0x189/0x270 fs/overlayfs/inode.c:225 ovl_posix_acl_xattr_set+0x2b7/0x830 fs/overlayfs/super.c:762 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878 __vfs_setxattr+0xdc/0x130 fs/xattr.c:150 __vfs_setxattr_noperm+0xfd/0x3d0 fs/xattr.c:181 __vfs_setxattr_locked+0x14d/0x250 fs/xattr.c:239 vfs_setxattr+0xcf/0x230 fs/xattr.c:256 setxattr+0x1a9/0x300 fs/xattr.c:523 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 path_setxattr+0x118/0x130 fs/xattr.c:542 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 SYSC_lsetxattr fs/xattr.c:564 [inline] SyS_lsetxattr+0x33/0x40 fs/xattr.c:560 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: &oi->lock --> &ovl_i_mutex_dir_key[depth] #2 --> sb_writers #3 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock( sb_writers SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 #3 ); do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 lock( entry_SYSCALL_64_after_hwframe+0x46/0xbb &ovl_i_mutex_dir_key[depth] RIP: 0033:0x45e219 #2); RSP: 002b:00007f01e61c9c68 EFLAGS: 00000246 lock( ORIG_RAX: 000000000000002e sb_writers RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 #3); RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 lock( RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000 &oi->lock R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c ); R13: 00007ffd6a423d0f R14: 00007f01e61ca9c0 R15: 000000000119bf8c *** DEADLOCK *** 3 locks held by syz-executor.1/10183: #0: (sb_writers#13){.+.+}, at: [] sb_start_write include/linux/fs.h:1549 [inline] #0: (sb_writers#13){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 #1: (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] inode_lock include/linux/fs.h:719 [inline] #1: (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] vfs_setxattr+0xb1/0x230 fs/xattr.c:255 #2: (sb_writers#3){.+.+}, at: [] sb_start_write include/linux/fs.h:1549 [inline] #2: (sb_writers#3){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 stack backtrace: CPU: 0 PID: 10183 Comm: syz-executor.1 Not tainted 4.14.217-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 ovl_copy_up_start+0x40/0xe0 fs/overlayfs/util.c:318 ovl_copy_up_one+0x21f/0x910 fs/overlayfs/copy_up.c:630 ovl_copy_up_flags+0xd5/0x120 fs/overlayfs/copy_up.c:685 ovl_xattr_set+0x189/0x270 fs/overlayfs/inode.c:225 ovl_posix_acl_xattr_set+0x2b7/0x830 fs/overlayfs/super.c:762 __vfs_setxattr+0xdc/0x130 fs/xattr.c:150 __vfs_setxattr_noperm+0xfd/0x3d0 fs/xattr.c:181 __vfs_setxattr_locked+0x14d/0x250 fs/xattr.c:239 vfs_setxattr+0xcf/0x230 fs/xattr.c:256 setxattr+0x1a9/0x300 fs/xattr.c:523 path_setxattr+0x118/0x130 fs/xattr.c:542 SYSC_lsetxattr fs/xattr.c:564 [inline] SyS_lsetxattr+0x33/0x40 fs/xattr.c:560 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fe6224bfc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219 RDX: 0000000020000200 RSI: 00000000200000c0 RDI: 0000000020000000 RBP: 000000000119bfd0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000024 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffec41e20ef R14: 00007fe6224c09c0 R15: 000000000119bf8c ip6_tunnel: ip6gretap0 xmit: Local address not yet configured! overlayfs: fs on 'file0' does not support file handles, falling back to index=off. Mem-Info: active_anon:159540 inactive_anon:4700 isolated_anon:0 active_file:6029 inactive_file:11690 isolated_file:0 unevictable:0 dirty:693 writeback:0 unstable:0 slab_reclaimable:17363 slab_unreclaimable:123695 mapped:60756 shmem:4886 pagetables:1269 bounce:0 free:1311951 free_pcp:214 free_cma:0 Node 0 active_anon:638160kB inactive_anon:18800kB active_file:23976kB inactive_file:46760kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:243024kB dirty:2760kB writeback:0kB shmem:19544kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 569344kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no Node 1 active_anon:0kB inactive_anon:0kB active_file:140kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:12kB 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 overlayfs: failed to resolve './file1': -2 Node 0 DMA32 free:1186252kB min:36200kB low:45248kB high:54296kB active_anon:639892kB inactive_anon:18800kB active_file:23976kB inactive_file:46760kB unevictable:0kB writepending:2760kB present:3129332kB managed:2788160kB mlocked:0kB kernel_stack:8192kB pagetables:4928kB bounce:0kB free_pcp:968kB local_pcp:268kB free_cma:0kB overlayfs: filesystem on './bus' not supported as upperdir 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:520kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. lowmem_reserve[]: 0 0 0 0 0 Node 1 Normal free:4040528kB min:53696kB low:67120kB high:80544kB active_anon:0kB inactive_anon:0kB active_file:140kB inactive_file:0kB unevictable:0kB writepending:12kB present:4194304kB managed:4128256kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB overlayfs: failed to resolve './file1': -2 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: 9158*4kB (UME) 191*8kB (UME) 89*16kB (UME) 65*32kB (UM) 23*64kB (UME) 10*128kB (UM) 4*256kB (UM) 2*512kB (UE) 1*1024kB (U) 3*2048kB (UME) 280*4096kB (M) = 1200512kB 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: 80*4kB (UME) 392*8kB (UME) 293*16kB (UME) 90*32kB (UM) 27*64kB (UM) 21*128kB (UME) 13*256kB (UME) 1*512kB (U) 3*1024kB (UME) 4*2048kB (UM) 979*4096kB (M) = 4040528kB overlayfs: fs on './file0' does not support file handles, falling back to index=off. Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 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 21971 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 363840 pages reserved 0 pages cma reserved overlayfs: fs on './file0' does not support file handles, falling back to index=off. IPVS: ftp: loaded support on port[0] = 21 overlayfs: fs on './file0' does not support file handles, falling back to index=off. IPVS: ftp: loaded support on port[0] = 21 overlayfs: fs on './file0' does not support file handles, falling back to index=off. IPVS: ftp: loaded support on port[0] = 21 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve './file0': -2 overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve './file0': -2 overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' overlayfs: failed to resolve './file1': -2 overlayfs: failed to resolve './file1': -2 overlayfs: missing 'lowerdir' overlayfs: failed to resolve './file1': -2 overlayfs: missing 'lowerdir' overlayfs: unrecognized mount option "lowerdir" or missing value overlayfs: unrecognized mount option "lowerdir" or missing value overlayfs: unrecognized mount option "lowerdir" or missing value overlayfs: missing 'lowerdir' overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: failed to resolve 'f': -2 overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: failed to resolve 'f': -2 overlayfs: failed to resolve 'f': -2 overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: failed to resolve 'fil': -2 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve 'fil': -2 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve 'fil': -2 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve 'file': -2 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve 'file': -2 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve 'file': -2 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve './file1': -2 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve './file1': -2 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve './file1': -2 overlayfs: failed to resolve './file1': -2 overlayfs: failed to resolve './file1': -2 overlayfs: failed to resolve './file1': -2 overlayfs: failed to resolve './file0': -2 overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' overlayfs: failed to resolve './file0': -2 overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' overlayfs: failed to resolve './file0': -2 overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' overlayfs: failed to resolve './file0': -2 overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir'