IPVS: ftp: loaded support on port[0] = 21 8021q: adding VLAN 0 to HW filter on device ipvlan568 ====================================================== WARNING: possible circular locking dependency detected 4.19.123-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/25524 is trying to acquire lock: 00000000235822c3 (&sig->cred_guard_mutex){+.+.}, at: lock_trace+0x45/0xe0 fs/proc/base.c:402 but task is already holding lock: 00000000efd23f05 (&p->lock){+.+.}, at: seq_read+0x6b/0x10f0 fs/seq_file.c:161 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&p->lock){+.+.}: seq_read+0x6b/0x10f0 fs/seq_file.c:161 proc_reg_read+0x1bd/0x280 fs/proc/inode.c:231 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x46b/0x640 fs/read_write.c:925 vfs_readv+0xf0/0x160 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x478/0x970 fs/splice.c:417 do_splice_to+0x10e/0x160 fs/splice.c:881 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959 do_splice_direct+0x1a8/0x270 fs/splice.c:1068 do_sendfile+0x549/0xc10 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64 fs/read_write.c:1494 [inline] __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (sb_writers#3){.+.+}: sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:360 ovl_do_remove+0xf8/0xd70 fs/overlayfs/dir.c:843 vfs_rmdir fs/namei.c:3882 [inline] vfs_rmdir+0x194/0x460 fs/namei.c:3861 do_rmdir+0x371/0x3e0 fs/namei.c:3943 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe IPVS: ftp: loaded support on port[0] = 21 -> #1 (&ovl_i_mutex_dir_key[depth]){++++}: inode_lock_shared include/linux/fs.h:758 [inline] do_last fs/namei.c:3326 [inline] path_openat+0x1d18/0x4200 fs/namei.c:3537 do_filp_open+0x1a1/0x280 fs/namei.c:3567 do_open_execat+0x124/0x5b0 fs/exec.c:853 __do_execve_file.isra.0+0x1577/0x2110 fs/exec.c:1755 do_execveat_common fs/exec.c:1866 [inline] do_execve fs/exec.c:1883 [inline] __do_sys_execve fs/exec.c:1964 [inline] __se_sys_execve fs/exec.c:1959 [inline] __x64_sys_execve+0x8a/0xb0 fs/exec.c:1959 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&sig->cred_guard_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1300 kernel/locking/mutex.c:1072 lock_trace+0x45/0xe0 fs/proc/base.c:402 proc_pid_stack+0x12c/0x290 fs/proc/base.c:452 proc_single_show+0xeb/0x170 fs/proc/base.c:755 seq_read+0x4b9/0x10f0 fs/seq_file.c:229 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x46b/0x640 fs/read_write.c:925 vfs_readv+0xf0/0x160 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x478/0x970 fs/splice.c:417 do_splice_to+0x10e/0x160 fs/splice.c:881 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959 do_splice_direct+0x1a8/0x270 fs/splice.c:1068 do_sendfile+0x549/0xc10 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64 fs/read_write.c:1494 [inline] __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe 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.5/25524: #0: 00000000efd23f05 (&p->lock){+.+.}, at: seq_read+0x6b/0x10f0 fs/seq_file.c:161 stack backtrace: CPU: 0 PID: 25524 Comm: syz-executor.5 Not tainted 4.19.123-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+0x188/0x20d lib/dump_stack.c:118 print_circular_bug.isra.0.cold+0x1c4/0x282 kernel/locking/lockdep.c:1221 check_prev_add kernel/locking/lockdep.c:1865 [inline] check_prevs_add kernel/locking/lockdep.c:1978 [inline] validate_chain kernel/locking/lockdep.c:2419 [inline] __lock_acquire+0x2e19/0x49c0 kernel/locking/lockdep.c:3415 8021q: adding VLAN 0 to HW filter on device ipvlan569 8021q: adding VLAN 0 to HW filter on device ipvlan570 lock_acquire+0x170/0x400 kernel/locking/lockdep.c:3907 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1300 kernel/locking/mutex.c:1072 lock_trace+0x45/0xe0 fs/proc/base.c:402 proc_pid_stack+0x12c/0x290 fs/proc/base.c:452 proc_single_show+0xeb/0x170 fs/proc/base.c:755 8021q: adding VLAN 0 to HW filter on device ipvlan571 seq_read+0x4b9/0x10f0 fs/seq_file.c:229 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x46b/0x640 fs/read_write.c:925 vfs_readv+0xf0/0x160 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x478/0x970 fs/splice.c:417 8021q: adding VLAN 0 to HW filter on device ipvlan572 do_splice_to+0x10e/0x160 fs/splice.c:881 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959 do_splice_direct+0x1a8/0x270 fs/splice.c:1068 do_sendfile+0x549/0xc10 fs/read_write.c:1447 8021q: adding VLAN 0 to HW filter on device ipvlan573 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64 fs/read_write.c:1494 [inline] __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1494 8021q: adding VLAN 0 to HW filter on device ipvlan574 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45ca29 Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7989948c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00000000004fc540 RCX: 000000000045ca29 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0800000080004103 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000008dc R14: 00000000004cba16 R15: 00007f79899496d4 8021q: adding VLAN 0 to HW filter on device ipvlan575 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=42682 sclass=netlink_route_socket pid=25621 comm=syz-executor.2 8021q: adding VLAN 0 to HW filter on device ipvlan576 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=42682 sclass=netlink_route_socket pid=25623 comm=syz-executor.2 8021q: adding VLAN 0 to HW filter on device ipvlan577 8021q: adding VLAN 0 to HW filter on device ipvlan578 audit: type=1800 audit(1589721472.005:310): pid=25667 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=17014 res=0 set match dimension is over the limit! 8021q: adding VLAN 0 to HW filter on device ipvlan579 audit: type=1804 audit(1589721472.025:311): pid=25667 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir957975845/syzkaller.TinscO/1895/file0" dev="sda1" ino=17014 res=1 set match dimension is over the limit! 8021q: adding VLAN 0 to HW filter on device ipvlan580 8021q: adding VLAN 0 to HW filter on device ipvlan581 8021q: adding VLAN 0 to HW filter on device ipvlan582 audit: type=1800 audit(1589721472.405:312): pid=25704 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=17015 res=0 audit: type=1804 audit(1589721472.425:313): pid=25704 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir957975845/syzkaller.TinscO/1896/file0" dev="sda1" ino=17015 res=1 8021q: adding VLAN 0 to HW filter on device ipvlan583 8021q: adding VLAN 0 to HW filter on device ipvlan584 8021q: adding VLAN 0 to HW filter on device ipvlan585 audit: type=1800 audit(1589721472.825:314): pid=25726 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=17015 res=0 audit: type=1804 audit(1589721472.855:315): pid=25726 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir957975845/syzkaller.TinscO/1897/file0" dev="sda1" ino=17015 res=1 8021q: adding VLAN 0 to HW filter on device ipvlan586 audit: type=1800 audit(1589721475.035:316): pid=25767 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=17033 res=0 8021q: adding VLAN 0 to HW filter on device ipvlan587 audit: type=1804 audit(1589721475.075:317): pid=25767 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir957975845/syzkaller.TinscO/1898/file0" dev="sda1" ino=17033 res=1 8021q: adding VLAN 0 to HW filter on device ipvlan588 8021q: adding VLAN 0 to HW filter on device ipvlan589 8021q: adding VLAN 0 to HW filter on device ipvlan590 audit: type=1800 audit(1589721475.445:318): pid=25807 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=17034 res=0 audit: type=1804 audit(1589721475.445:319): pid=25807 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir957975845/syzkaller.TinscO/1899/file0" dev="sda1" ino=17034 res=1 set match dimension is over the limit! 8021q: adding VLAN 0 to HW filter on device ipvlan591 8021q: adding VLAN 0 to HW filter on device ipvlan592 8021q: adding VLAN 0 to HW filter on device ipvlan593 8021q: adding VLAN 0 to HW filter on device ipvlan594 8021q: adding VLAN 0 to HW filter on device ipvlan595 8021q: adding VLAN 0 to HW filter on device ipvlan596 set match dimension is over the limit! 8021q: adding VLAN 0 to HW filter on device ipvlan597 8021q: adding VLAN 0 to HW filter on device ipvlan598 kauditd_printk_skb: 4 callbacks suppressed audit: type=1800 audit(1589721477.145:324): pid=25888 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=17107 res=0 8021q: adding VLAN 0 to HW filter on device ipvlan599 audit: type=1804 audit(1589721477.175:325): pid=25888 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir957975845/syzkaller.TinscO/1902/file0" dev="sda1" ino=17107 res=1 8021q: adding VLAN 0 to HW filter on device ipvlan600 audit: type=1800 audit(1589721478.496:326): pid=25927 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=17201 res=0 8021q: adding VLAN 0 to HW filter on device ipvlan601 audit: type=1804 audit(1589721478.536:327): pid=25927 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir957975845/syzkaller.TinscO/1903/file0" dev="sda1" ino=17201 res=1 8021q: adding VLAN 0 to HW filter on device ipvlan602 8021q: adding VLAN 0 to HW filter on device ipvlan603 8021q: adding VLAN 0 to HW filter on device ipvlan604