===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 5.5.0-rc1-syzkaller #0 Not tainted ----------------------------------------------------- syz-executor.1/8737 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: ffff888099440098 (&(&s->cache_lock)->rlock){+.+.}, at: spin_lock include/linux/spinlock.h:338 [inline] ffff888099440098 (&(&s->cache_lock)->rlock){+.+.}, at: sidtab_sid2str_put.part.4+0x31/0x7e0 security/selinux/ss/sidtab.c:533 and this task is already holding: ffffffff88c63be0 (&(&nf_conntrack_locks[i])->rlock){+.-.}, at: spin_lock include/linux/spinlock.h:338 [inline] ffffffff88c63be0 (&(&nf_conntrack_locks[i])->rlock){+.-.}, at: nf_conntrack_lock+0xd/0x50 net/netfilter/nf_conntrack_core.c:91 which would create a new lock dependency: (&(&nf_conntrack_locks[i])->rlock){+.-.} -> (&(&s->cache_lock)->rlock){+.+.} but this new dependency connects a SOFTIRQ-irq-safe lock: (&(&nf_conntrack_locks[i])->rlock){+.-.} ... which became SOFTIRQ-irq-safe at: lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4485 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] nf_conntrack_lock+0xd/0x50 net/netfilter/nf_conntrack_core.c:91 nf_conntrack_double_lock.isra.30+0xa1/0xb0 net/netfilter/nf_conntrack_core.c:134 __nf_conntrack_confirm+0x270/0x26d0 net/netfilter/nf_conntrack_core.c:962 nf_conntrack_confirm include/net/netfilter/nf_conntrack_core.h:63 [inline] nf_confirm+0x2e6/0x3b0 net/netfilter/nf_conntrack_proto.c:154 ipv4_confirm+0x118/0x230 net/netfilter/nf_conntrack_proto.c:169 nf_hook_entry_hookfn include/linux/netfilter.h:135 [inline] nf_hook_slow+0xa3/0x170 net/netfilter/core.c:512 nf_hook include/linux/netfilter.h:262 [inline] NF_HOOK include/linux/netfilter.h:305 [inline] ip_local_deliver+0x2ae/0x430 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_sublist_rcv_finish+0x87/0x260 net/ipv4/ip_input.c:549 ip_list_rcv_finish net/ipv4/ip_input.c:599 [inline] ip_sublist_rcv+0x49a/0x8b0 net/ipv4/ip_input.c:607 ip_list_rcv+0x2e9/0x4b8 net/ipv4/ip_input.c:642 __netif_receive_skb_list_ptype net/core/dev.c:5193 [inline] __netif_receive_skb_list_core+0x4bd/0x930 net/core/dev.c:5241 __netif_receive_skb_list net/core/dev.c:5293 [inline] netif_receive_skb_list_internal+0x61b/0xd60 net/core/dev.c:5388 gro_normal_list.part.137+0x19/0xb0 net/core/dev.c:5810 gro_normal_list net/core/dev.c:6216 [inline] napi_complete_done+0x164/0x410 net/core/dev.c:6203 virtqueue_napi_complete+0x2a/0x70 drivers/net/virtio_net.c:329 virtnet_poll+0x9a8/0xe50 drivers/net/virtio_net.c:1432 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x458/0xe40 net/core/dev.c:6600 __do_softirq+0x262/0x9a8 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19a/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] do_IRQ+0xe3/0x280 arch/x86/kernel/irq.c:263 ret_from_intr+0x0/0x36 arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] lock_acquire+0x212/0x410 kernel/locking/lockdep.c:4488 rcu_lock_acquire include/linux/rcupdate.h:208 [inline] rcu_read_lock include/linux/rcupdate.h:617 [inline] avc_has_perm_noaudit+0xc4/0x460 security/selinux/avc.c:1159 selinux_inode_permission+0x2b7/0x470 security/selinux/hooks.c:3062 security_inode_permission+0x73/0xb0 security/security.c:1202 inode_permission+0xbe/0x3b0 fs/namei.c:457 may_lookup fs/namei.c:1690 [inline] link_path_walk.part.41+0x16d/0x1550 fs/namei.c:2071 link_path_walk fs/namei.c:2059 [inline] path_lookupat.isra.43+0x1aa/0x850 fs/namei.c:2304 filename_lookup.part.58+0x15e/0x390 fs/namei.c:2335 filename_lookup fs/namei.c:2328 [inline] user_path_at_empty+0x39/0x40 fs/namei.c:2615 user_path_at include/linux/namei.h:49 [inline] do_faccessat+0x22a/0x630 fs/open.c:398 __do_sys_access fs/open.c:450 [inline] __se_sys_access fs/open.c:448 [inline] __x64_sys_access+0x54/0x80 fs/open.c:448 do_syscall_64+0xca/0x5f0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe to a SOFTIRQ-irq-unsafe lock: (&(&s->cache_lock)->rlock){+.+.} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4485 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] sidtab_sid2str_put.part.4+0x31/0x7e0 security/selinux/ss/sidtab.c:533 sidtab_sid2str_put+0x5d/0x90 security/selinux/ss/sidtab.c:566 sidtab_entry_to_string+0xb2/0xf0 security/selinux/ss/services.c:1279 security_sid_to_context_core.isra.14+0x222/0x350 security/selinux/ss/services.c:1355 security_sid_to_context+0x20/0x30 security/selinux/ss/services.c:1378 avc_audit_post_callback+0x103/0x660 security/selinux/avc.c:712 common_lsm_audit+0x4c2/0x1bf0 security/lsm_audit.c:461 slow_avc_audit+0x115/0x1e0 security/selinux/avc.c:797 avc_audit security/selinux/include/avc.h:138 [inline] avc_has_perm+0x3c1/0x490 security/selinux/avc.c:1201 inode_has_perm+0x164/0x200 security/selinux/hooks.c:1684 selinux_mmap_file+0xf2/0x190 security/selinux/hooks.c:3710 security_mmap_file+0xcb/0x140 security/security.c:1449 vm_mmap_pgoff+0xe7/0x210 mm/util.c:502 vm_mmap+0x30/0x40 mm/util.c:525 elf_map+0xc7/0x2b0 fs/binfmt_elf.c:377 load_elf_binary+0xb6b/0x4b70 fs/binfmt_elf.c:982 search_binary_handler+0x11f/0x620 fs/exec.c:1658 exec_binprm fs/exec.c:1701 [inline] __do_execve_file.isra.34+0x12bc/0x1fd0 fs/exec.c:1821 do_execveat_common fs/exec.c:1867 [inline] do_execve fs/exec.c:1884 [inline] __do_sys_execve fs/exec.c:1960 [inline] __se_sys_execve fs/exec.c:1955 [inline] __x64_sys_execve+0x8a/0xb0 fs/exec.c:1955 do_syscall_64+0xca/0x5f0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&(&s->cache_lock)->rlock); local_irq_disable(); lock(&(&nf_conntrack_locks[i])->rlock); lock(&(&s->cache_lock)->rlock); lock(&(&nf_conntrack_locks[i])->rlock); *** DEADLOCK *** 4 locks held by syz-executor.1/8737: #0: ffffffff8b48e268 (&table[i].mutex){+.+.}, at: nfnl_lock net/netfilter/nfnetlink.c:62 [inline] #0: ffffffff8b48e268 (&table[i].mutex){+.+.}, at: nfnetlink_rcv_msg+0x6e1/0xbf0 net/netfilter/nfnetlink.c:224 #1: ffff8880a959f5d8 (nlk_cb_mutex-NETFILTER){+.+.}, at: netlink_dump+0xcc/0x10c0 net/netlink/af_netlink.c:2199 #2: ffffffff88c63be0 (&(&nf_conntrack_locks[i])->rlock){+.-.}, at: spin_lock include/linux/spinlock.h:338 [inline] #2: ffffffff88c63be0 (&(&nf_conntrack_locks[i])->rlock){+.-.}, at: nf_conntrack_lock+0xd/0x50 net/netfilter/nf_conntrack_core.c:91 #3: ffffffff8aac1e28 (&selinux_ss.policy_rwlock){.+.?}, at: security_sid_to_context_core.isra.14+0x16c/0x350 security/selinux/ss/services.c:1338 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (&(&nf_conntrack_locks[i])->rlock){+.-.} { HARDIRQ-ON-W at: lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4485 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] nf_conntrack_lock+0xd/0x50 net/netfilter/nf_conntrack_core.c:91 get_next_corpse net/netfilter/nf_conntrack_core.c:2000 [inline] nf_ct_iterate_cleanup+0x166/0x370 net/netfilter/nf_conntrack_core.c:2034 nf_ct_iterate_destroy+0x104/0x130 net/netfilter/nf_conntrack_core.c:2161 nf_conntrack_helper_unregister+0x100/0x150 net/netfilter/nf_conntrack_helper.c:469 nf_conntrack_helpers_unregister net/netfilter/nf_conntrack_helper.c:532 [inline] nf_conntrack_helpers_register+0x5d/0x80 net/netfilter/nf_conntrack_helper.c:523 nf_conntrack_sip_init+0x265/0x28c net/netfilter/nf_conntrack_sip.c:1693 do_one_initcall+0xd8/0x5b5 init/main.c:938 do_initcall_level init/main.c:1006 [inline] do_initcalls init/main.c:1014 [inline] do_basic_setup init/main.c:1031 [inline] kernel_init_freeable+0x457/0x4f6 init/main.c:1191 kernel_init+0xc/0x111 init/main.c:1109 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 IN-SOFTIRQ-W at: lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4485 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] nf_conntrack_lock+0xd/0x50 net/netfilter/nf_conntrack_core.c:91 nf_conntrack_double_lock.isra.30+0xa1/0xb0 net/netfilter/nf_conntrack_core.c:134 __nf_conntrack_confirm+0x270/0x26d0 net/netfilter/nf_conntrack_core.c:962 nf_conntrack_confirm include/net/netfilter/nf_conntrack_core.h:63 [inline] nf_confirm+0x2e6/0x3b0 net/netfilter/nf_conntrack_proto.c:154 ipv4_confirm+0x118/0x230 net/netfilter/nf_conntrack_proto.c:169 nf_hook_entry_hookfn include/linux/netfilter.h:135 [inline] nf_hook_slow+0xa3/0x170 net/netfilter/core.c:512 nf_hook include/linux/netfilter.h:262 [inline] NF_HOOK include/linux/netfilter.h:305 [inline] ip_local_deliver+0x2ae/0x430 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_sublist_rcv_finish+0x87/0x260 net/ipv4/ip_input.c:549 ip_list_rcv_finish net/ipv4/ip_input.c:599 [inline] ip_sublist_rcv+0x49a/0x8b0 net/ipv4/ip_input.c:607 ip_list_rcv+0x2e9/0x4b8 net/ipv4/ip_input.c:642 __netif_receive_skb_list_ptype net/core/dev.c:5193 [inline] __netif_receive_skb_list_core+0x4bd/0x930 net/core/dev.c:5241 __netif_receive_skb_list net/core/dev.c:5293 [inline] netif_receive_skb_list_internal+0x61b/0xd60 net/core/dev.c:5388 gro_normal_list.part.137+0x19/0xb0 net/core/dev.c:5810 gro_normal_list net/core/dev.c:6216 [inline] napi_complete_done+0x164/0x410 net/core/dev.c:6203 virtqueue_napi_complete+0x2a/0x70 drivers/net/virtio_net.c:329 virtnet_poll+0x9a8/0xe50 drivers/net/virtio_net.c:1432 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x458/0xe40 net/core/dev.c:6600 __do_softirq+0x262/0x9a8 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19a/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] do_IRQ+0xe3/0x280 arch/x86/kernel/irq.c:263 ret_from_intr+0x0/0x36 arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] lock_acquire+0x212/0x410 kernel/locking/lockdep.c:4488 rcu_lock_acquire include/linux/rcupdate.h:208 [inline] rcu_read_lock include/linux/rcupdate.h:617 [inline] avc_has_perm_noaudit+0xc4/0x460 security/selinux/avc.c:1159 selinux_inode_permission+0x2b7/0x470 security/selinux/hooks.c:3062 security_inode_permission+0x73/0xb0 security/security.c:1202 inode_permission+0xbe/0x3b0 fs/namei.c:457 may_lookup fs/namei.c:1690 [inline] link_path_walk.part.41+0x16d/0x1550 fs/namei.c:2071 link_path_walk fs/namei.c:2059 [inline] path_lookupat.isra.43+0x1aa/0x850 fs/namei.c:2304 filename_lookup.part.58+0x15e/0x390 fs/namei.c:2335 filename_lookup fs/namei.c:2328 [inline] user_path_at_empty+0x39/0x40 fs/namei.c:2615 user_path_at include/linux/namei.h:49 [inline] do_faccessat+0x22a/0x630 fs/open.c:398 __do_sys_access fs/open.c:450 [inline] __se_sys_access fs/open.c:448 [inline] __x64_sys_access+0x54/0x80 fs/open.c:448 do_syscall_64+0xca/0x5f0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe INITIAL USE at: lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4485 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] nf_conntrack_lock+0xd/0x50 net/netfilter/nf_conntrack_core.c:91 get_next_corpse net/netfilter/nf_conntrack_core.c:2000 [inline] nf_ct_iterate_cleanup+0x166/0x370 net/netfilter/nf_conntrack_core.c:2034 nf_ct_iterate_destroy+0x104/0x130 net/netfilter/nf_conntrack_core.c:2161 nf_conntrack_helper_unregister+0x100/0x150 net/netfilter/nf_conntrack_helper.c:469 nf_conntrack_helpers_unregister net/netfilter/nf_conntrack_helper.c:532 [inline] nf_conntrack_helpers_register+0x5d/0x80 net/netfilter/nf_conntrack_helper.c:523 nf_conntrack_sip_init+0x265/0x28c net/netfilter/nf_conntrack_sip.c:1693 do_one_initcall+0xd8/0x5b5 init/main.c:938 do_initcall_level init/main.c:1006 [inline] do_initcalls init/main.c:1014 [inline] do_basic_setup init/main.c:1031 [inline] kernel_init_freeable+0x457/0x4f6 init/main.c:1191 kernel_init+0xc/0x111 init/main.c:1109 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 } ... key at: [] __key.79443+0x0/0x40 ... acquired at: lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4485 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] sidtab_sid2str_put.part.4+0x31/0x7e0 security/selinux/ss/sidtab.c:533 sidtab_sid2str_put security/selinux/ss/sidtab.c:594 [inline] sidtab_sid2str_get+0x315/0x3ab security/selinux/ss/sidtab.c:594 sidtab_entry_to_string+0x31/0xf0 security/selinux/ss/services.c:1271 security_sid_to_context_core.isra.14+0x222/0x350 security/selinux/ss/services.c:1355 security_sid_to_context+0x20/0x30 security/selinux/ss/services.c:1378 selinux_secid_to_secctx+0x18/0x20 security/selinux/hooks.c:6470 security_secid_to_secctx+0x53/0xa0 security/security.c:1917 ctnetlink_dump_secctx.isra.33+0x8d/0x2c0 net/netfilter/nf_conntrack_netlink.c:335 ctnetlink_dump_info net/netfilter/nf_conntrack_netlink.c:531 [inline] ctnetlink_fill_info+0x610/0xb00 net/netfilter/nf_conntrack_netlink.c:591 ctnetlink_dump_table+0x595/0xe60 net/netfilter/nf_conntrack_netlink.c:979 netlink_dump+0x49e/0x10c0 net/netlink/af_netlink.c:2244 __netlink_dump_start+0x57d/0x8b0 net/netlink/af_netlink.c:2352 netlink_dump_start include/linux/netlink.h:233 [inline] ctnetlink_get_conntrack+0x4a7/0x610 net/netfilter/nf_conntrack_netlink.c:1355 nfnetlink_rcv_msg+0x92d/0xbf0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x13c/0x380 net/netlink/af_netlink.c:2477 nfnetlink_rcv+0x15d/0x3b0 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x45e/0x6a0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x7b0/0xcb0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:659 ____sys_sendmsg+0x603/0x950 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xca/0x5f0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (&(&s->cache_lock)->rlock){+.+.} { HARDIRQ-ON-W at: lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4485 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] sidtab_sid2str_put.part.4+0x31/0x7e0 security/selinux/ss/sidtab.c:533 sidtab_sid2str_put+0x5d/0x90 security/selinux/ss/sidtab.c:566 sidtab_entry_to_string+0xb2/0xf0 security/selinux/ss/services.c:1279 security_sid_to_context_core.isra.14+0x222/0x350 security/selinux/ss/services.c:1355 security_sid_to_context+0x20/0x30 security/selinux/ss/services.c:1378 avc_audit_post_callback+0x103/0x660 security/selinux/avc.c:712 common_lsm_audit+0x4c2/0x1bf0 security/lsm_audit.c:461 slow_avc_audit+0x115/0x1e0 security/selinux/avc.c:797 avc_audit security/selinux/include/avc.h:138 [inline] avc_has_perm+0x3c1/0x490 security/selinux/avc.c:1201 inode_has_perm+0x164/0x200 security/selinux/hooks.c:1684 selinux_mmap_file+0xf2/0x190 security/selinux/hooks.c:3710 security_mmap_file+0xcb/0x140 security/security.c:1449 vm_mmap_pgoff+0xe7/0x210 mm/util.c:502 vm_mmap+0x30/0x40 mm/util.c:525 elf_map+0xc7/0x2b0 fs/binfmt_elf.c:377 load_elf_binary+0xb6b/0x4b70 fs/binfmt_elf.c:982 search_binary_handler+0x11f/0x620 fs/exec.c:1658 exec_binprm fs/exec.c:1701 [inline] __do_execve_file.isra.34+0x12bc/0x1fd0 fs/exec.c:1821 do_execveat_common fs/exec.c:1867 [inline] do_execve fs/exec.c:1884 [inline] __do_sys_execve fs/exec.c:1960 [inline] __se_sys_execve fs/exec.c:1955 [inline] __x64_sys_execve+0x8a/0xb0 fs/exec.c:1955 do_syscall_64+0xca/0x5f0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe SOFTIRQ-ON-W at: lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4485 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] sidtab_sid2str_put.part.4+0x31/0x7e0 security/selinux/ss/sidtab.c:533 sidtab_sid2str_put+0x5d/0x90 security/selinux/ss/sidtab.c:566 sidtab_entry_to_string+0xb2/0xf0 security/selinux/ss/services.c:1279 security_sid_to_context_core.isra.14+0x222/0x350 security/selinux/ss/services.c:1355 security_sid_to_context+0x20/0x30 security/selinux/ss/services.c:1378 avc_audit_post_callback+0x103/0x660 security/selinux/avc.c:712 common_lsm_audit+0x4c2/0x1bf0 security/lsm_audit.c:461 slow_avc_audit+0x115/0x1e0 security/selinux/avc.c:797 avc_audit security/selinux/include/avc.h:138 [inline] avc_has_perm+0x3c1/0x490 security/selinux/avc.c:1201 inode_has_perm+0x164/0x200 security/selinux/hooks.c:1684 selinux_mmap_file+0xf2/0x190 security/selinux/hooks.c:3710 security_mmap_file+0xcb/0x140 security/security.c:1449 vm_mmap_pgoff+0xe7/0x210 mm/util.c:502 vm_mmap+0x30/0x40 mm/util.c:525 elf_map+0xc7/0x2b0 fs/binfmt_elf.c:377 load_elf_binary+0xb6b/0x4b70 fs/binfmt_elf.c:982 search_binary_handler+0x11f/0x620 fs/exec.c:1658 exec_binprm fs/exec.c:1701 [inline] __do_execve_file.isra.34+0x12bc/0x1fd0 fs/exec.c:1821 do_execveat_common fs/exec.c:1867 [inline] do_execve fs/exec.c:1884 [inline] __do_sys_execve fs/exec.c:1960 [inline] __se_sys_execve fs/exec.c:1955 [inline] __x64_sys_execve+0x8a/0xb0 fs/exec.c:1955 do_syscall_64+0xca/0x5f0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe INITIAL USE at: lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4485 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] sidtab_sid2str_put.part.4+0x31/0x7e0 security/selinux/ss/sidtab.c:533 sidtab_sid2str_put+0x5d/0x90 security/selinux/ss/sidtab.c:566 sidtab_entry_to_string+0xb2/0xf0 security/selinux/ss/services.c:1279 security_sid_to_context_core.isra.14+0x222/0x350 security/selinux/ss/services.c:1355 security_sid_to_context+0x20/0x30 security/selinux/ss/services.c:1378 avc_audit_post_callback+0x103/0x660 security/selinux/avc.c:712 common_lsm_audit+0x4c2/0x1bf0 security/lsm_audit.c:461 slow_avc_audit+0x115/0x1e0 security/selinux/avc.c:797 avc_audit security/selinux/include/avc.h:138 [inline] avc_has_perm+0x3c1/0x490 security/selinux/avc.c:1201 inode_has_perm+0x164/0x200 security/selinux/hooks.c:1684 selinux_mmap_file+0xf2/0x190 security/selinux/hooks.c:3710 security_mmap_file+0xcb/0x140 security/security.c:1449 vm_mmap_pgoff+0xe7/0x210 mm/util.c:502 vm_mmap+0x30/0x40 mm/util.c:525 elf_map+0xc7/0x2b0 fs/binfmt_elf.c:377 load_elf_binary+0xb6b/0x4b70 fs/binfmt_elf.c:982 search_binary_handler+0x11f/0x620 fs/exec.c:1658 exec_binprm fs/exec.c:1701 [inline] __do_execve_file.isra.34+0x12bc/0x1fd0 fs/exec.c:1821 do_execveat_common fs/exec.c:1867 [inline] do_execve fs/exec.c:1884 [inline] __do_sys_execve fs/exec.c:1960 [inline] __se_sys_execve fs/exec.c:1955 [inline] __x64_sys_execve+0x8a/0xb0 fs/exec.c:1955 do_syscall_64+0xca/0x5f0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe } ... key at: [] __key.69071+0x0/0x40 ... acquired at: lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4485 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] sidtab_sid2str_put.part.4+0x31/0x7e0 security/selinux/ss/sidtab.c:533 sidtab_sid2str_put security/selinux/ss/sidtab.c:594 [inline] sidtab_sid2str_get+0x315/0x3ab security/selinux/ss/sidtab.c:594 sidtab_entry_to_string+0x31/0xf0 security/selinux/ss/services.c:1271 security_sid_to_context_core.isra.14+0x222/0x350 security/selinux/ss/services.c:1355 security_sid_to_context+0x20/0x30 security/selinux/ss/services.c:1378 selinux_secid_to_secctx+0x18/0x20 security/selinux/hooks.c:6470 security_secid_to_secctx+0x53/0xa0 security/security.c:1917 ctnetlink_dump_secctx.isra.33+0x8d/0x2c0 net/netfilter/nf_conntrack_netlink.c:335 ctnetlink_dump_info net/netfilter/nf_conntrack_netlink.c:531 [inline] ctnetlink_fill_info+0x610/0xb00 net/netfilter/nf_conntrack_netlink.c:591 ctnetlink_dump_table+0x595/0xe60 net/netfilter/nf_conntrack_netlink.c:979 netlink_dump+0x49e/0x10c0 net/netlink/af_netlink.c:2244 __netlink_dump_start+0x57d/0x8b0 net/netlink/af_netlink.c:2352 netlink_dump_start include/linux/netlink.h:233 [inline] ctnetlink_get_conntrack+0x4a7/0x610 net/netfilter/nf_conntrack_netlink.c:1355 nfnetlink_rcv_msg+0x92d/0xbf0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x13c/0x380 net/netlink/af_netlink.c:2477 nfnetlink_rcv+0x15d/0x3b0 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x45e/0x6a0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x7b0/0xcb0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:659 ____sys_sendmsg+0x603/0x950 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xca/0x5f0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe stack backtrace: CPU: 1 PID: 8737 Comm: syz-executor.1 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x12d/0x187 lib/dump_stack.c:118 print_bad_irq_dependency kernel/locking/lockdep.c:2095 [inline] check_irq_usage.cold.62+0x57e/0x6d8 kernel/locking/lockdep.c:2293 check_prev_add kernel/locking/lockdep.c:2480 [inline] check_prevs_add kernel/locking/lockdep.c:2581 [inline] validate_chain kernel/locking/lockdep.c:2971 [inline] __lock_acquire+0x28b7/0x4ef0 kernel/locking/lockdep.c:3955 lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4485 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] sidtab_sid2str_put.part.4+0x31/0x7e0 security/selinux/ss/sidtab.c:533 sidtab_sid2str_put security/selinux/ss/sidtab.c:594 [inline] sidtab_sid2str_get+0x315/0x3ab security/selinux/ss/sidtab.c:594 sidtab_entry_to_string+0x31/0xf0 security/selinux/ss/services.c:1271 security_sid_to_context_core.isra.14+0x222/0x350 security/selinux/ss/services.c:1355 security_sid_to_context+0x20/0x30 security/selinux/ss/services.c:1378 selinux_secid_to_secctx+0x18/0x20 security/selinux/hooks.c:6470 security_secid_to_secctx+0x53/0xa0 security/security.c:1917 ctnetlink_dump_secctx.isra.33+0x8d/0x2c0 net/netfilter/nf_conntrack_netlink.c:335 ctnetlink_dump_info net/netfilter/nf_conntrack_netlink.c:531 [inline] ctnetlink_fill_info+0x610/0xb00 net/netfilter/nf_conntrack_netlink.c:591 ctnetlink_dump_table+0x595/0xe60 net/netfilter/nf_conntrack_netlink.c:979 netlink_dump+0x49e/0x10c0 net/netlink/af_netlink.c:2244 __netlink_dump_start+0x57d/0x8b0 net/netlink/af_netlink.c:2352 netlink_dump_start include/linux/netlink.h:233 [inline] ctnetlink_get_conntrack+0x4a7/0x610 net/netfilter/nf_conntrack_netlink.c:1355 nfnetlink_rcv_msg+0x92d/0xbf0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x13c/0x380 net/netlink/af_netlink.c:2477 nfnetlink_rcv+0x15d/0x3b0 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x45e/0x6a0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x7b0/0xcb0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:659 ____sys_sendmsg+0x603/0x950 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xca/0x5f0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b349 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fdf65e57c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fdf65e586d4 RCX: 000000000045b349 RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000009c0 R14: 00000000004cb312 R15: 000000000075bf2c