ipt_CLUSTERIP: Please specify destination IP ====================================================== WARNING: possible circular locking dependency detected 4.19.201-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/10784 is trying to acquire lock: 0000000058e693a2 (&sig->cred_guard_mutex){+.+.}, at: do_io_accounting fs/proc/base.c:2750 [inline] 0000000058e693a2 (&sig->cred_guard_mutex){+.+.}, at: proc_tid_io_accounting+0x184/0x2b0 fs/proc/base.c:2793 but task is already holding lock: 00000000dd418ca2 (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 EXT4-fs warning (device sda1): ext4_ioctl:814: Setting inode version is not supported with metadata_csum enabled. which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&p->lock){+.+.}: seq_read+0x6b/0x11c0 fs/seq_file.c:164 proc_reg_read+0x1bd/0x2d0 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+0x471/0x630 fs/read_write.c:925 vfs_readv+0xe5/0x150 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x457/0xa00 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+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 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){.+.+}: file_start_write include/linux/fs.h:2779 [inline] ovl_write_iter+0x932/0xb40 fs/overlayfs/file.c:282 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&ovl_i_mutex_key[depth]){+.+.}: inode_lock include/linux/fs.h:748 [inline] process_measurement+0x926/0x1440 security/integrity/ima/ima_main.c:205 ima_file_check+0xb9/0x100 security/integrity/ima/ima_main.c:391 do_last fs/namei.c:3425 [inline] path_openat+0x7e4/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_open_execat+0x11d/0x5b0 fs/exec.c:853 __do_execve_file+0x1a8b/0x2360 fs/exec.c:1770 do_execveat_common fs/exec.c:1879 [inline] do_execve+0x35/0x50 fs/exec.c:1896 __do_sys_execve fs/exec.c:1977 [inline] __se_sys_execve fs/exec.c:1972 [inline] __x64_sys_execve+0x7c/0xa0 fs/exec.c:1972 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:938 [inline] __mutex_lock+0xd7/0x1200 kernel/locking/mutex.c:1083 do_io_accounting fs/proc/base.c:2750 [inline] proc_tid_io_accounting+0x184/0x2b0 fs/proc/base.c:2793 proc_single_show+0xeb/0x170 fs/proc/base.c:755 seq_read+0x4e0/0x11c0 fs/seq_file.c:232 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x471/0x630 fs/read_write.c:925 vfs_readv+0xe5/0x150 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x457/0xa00 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+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 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 *** 2 locks held by syz-executor.4/10784: #0: 0000000057473909 (sb_writers#4){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 0000000057473909 (sb_writers#4){.+.+}, at: do_sendfile+0x97d/0xc30 fs/read_write.c:1446 #1: 00000000dd418ca2 (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 stack backtrace: CPU: 0 PID: 10784 Comm: syz-executor.4 Not tainted 4.19.201-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+0x1fc/0x2ef lib/dump_stack.c:118 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2420 [inline] __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __mutex_lock_common kernel/locking/mutex.c:938 [inline] __mutex_lock+0xd7/0x1200 kernel/locking/mutex.c:1083 do_io_accounting fs/proc/base.c:2750 [inline] proc_tid_io_accounting+0x184/0x2b0 fs/proc/base.c:2793 proc_single_show+0xeb/0x170 fs/proc/base.c:755 seq_read+0x4e0/0x11c0 fs/seq_file.c:232 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x471/0x630 fs/read_write.c:925 vfs_readv+0xe5/0x150 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x457/0xa00 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+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f30ff360188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000ffff R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe07c083ff R14: 00007f30ff360300 R15: 0000000000022000 EXT4-fs warning (device sda1): ext4_ioctl:814: Setting inode version is not supported with metadata_csum enabled. ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP audit: type=1804 audit(1628249266.850:49): pid=10808 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir837654955/syzkaller.pH0RBy/1120/cgroup.controllers" dev="sda1" ino=14163 res=1 ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP PM: Marking nosave pages: [mem 0x00000000-0x00000fff] PM: Marking nosave pages: [mem 0x0009f000-0x000fffff] PM: Marking nosave pages: [mem 0xbfffd000-0xffffffff] ipt_CLUSTERIP: Please specify destination IP PM: Basic memory bitmaps created PM: Basic memory bitmaps freed PM: Marking nosave pages: [mem 0x00000000-0x00000fff] PM: Marking nosave pages: [mem 0x0009f000-0x000fffff] PM: Marking nosave pages: [mem 0xbfffd000-0xffffffff] PM: Basic memory bitmaps created audit: type=1804 audit(1628249267.360:50): pid=10849 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir837654955/syzkaller.pH0RBy/1121/cgroup.controllers" dev="sda1" ino=14421 res=1 PM: Basic memory bitmaps freed ipt_CLUSTERIP: Please specify destination IP PM: Marking nosave pages: [mem 0x00000000-0x00000fff] ipt_CLUSTERIP: Please specify destination IP PM: Marking nosave pages: [mem 0x0009f000-0x000fffff] PM: Marking nosave pages: [mem 0xbfffd000-0xffffffff] ipt_CLUSTERIP: Please specify destination IP PM: Basic memory bitmaps created PM: Basic memory bitmaps freed ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP xt_hashlimit: overflow, try lower: 0/0 ipt_CLUSTERIP: Please specify destination IP xt_hashlimit: overflow, try lower: 0/0 ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP xt_hashlimit: overflow, try lower: 0/0 ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP xt_hashlimit: overflow, try lower: 0/0 ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP xt_hashlimit: overflow, try lower: 0/0 ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP xt_hashlimit: overflow, try lower: 0/0 xt_hashlimit: overflow, try lower: 0/0 ipt_CLUSTERIP: Please specify destination IP xt_hashlimit: overflow, try lower: 0/0 ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP xt_hashlimit: overflow, try lower: 0/0 ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP xt_hashlimit: overflow, try lower: 0/0 ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 ipt_CLUSTERIP: Please specify destination IP CPU: 1 PID: 12156 Comm: syz-executor.5 Not tainted 4.19.201-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+0x1fc/0x2ef lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0xf lib/fault-inject.c:149 __should_failslab+0x115/0x180 mm/failslab.c:32 ipt_CLUSTERIP: Please specify destination IP should_failslab+0x5/0x10 mm/slab_common.c:1590 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc_node mm/slab.c:3304 [inline] kmem_cache_alloc_node_trace+0x244/0x3b0 mm/slab.c:3666 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node+0x38/0x70 mm/slab.c:3696 kmalloc_node include/linux/slab.h:557 [inline] kvmalloc_node+0x61/0xf0 mm/util.c:423 kvmalloc include/linux/mm.h:577 [inline] xt_alloc_table_info+0x3c/0xa0 net/netfilter/x_tables.c:1177 do_replace net/ipv4/netfilter/ip_tables.c:1128 [inline] do_ipt_set_ctl+0x214/0x420 net/ipv4/netfilter/ip_tables.c:1677 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x6f/0xc0 net/netfilter/nf_sockopt.c:115 ipt_CLUSTERIP: Please specify destination IP ip_setsockopt net/ipv4/ip_sockglue.c:1258 [inline] ip_setsockopt+0xd8/0xf0 net/ipv4/ip_sockglue.c:1238 raw_setsockopt+0xd8/0x100 net/ipv4/raw.c:861 __sys_setsockopt+0x14d/0x240 net/socket.c:2011 __do_sys_setsockopt net/socket.c:2022 [inline] __se_sys_setsockopt net/socket.c:2019 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2019 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 ipt_CLUSTERIP: Please specify destination IP entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 ipt_CLUSTERIP: Please specify destination IP RSP: 002b:00007fe7ae212188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000040 RSI: 8001000000000000 RDI: 0000000000000003 RBP: 00007fe7ae2121d0 R08: 0000000000000320 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 ipt_CLUSTERIP: Please specify destination IP R13: 00007ffc23ce68ff R14: 00007fe7ae212300 R15: 0000000000022000 ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP