FAT-fs (loop1): Unrecognized mount option "appraise_type=imasig" or missing value ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/16443 is trying to acquire lock: 000000000edef39d (&sig->cred_guard_mutex){+.+.}, at: do_io_accounting fs/proc/base.c:2750 [inline] 000000000edef39d (&sig->cred_guard_mutex){+.+.}, at: proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 but task is already holding lock: 0000000016e352c4 (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 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){.+.+}: sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:360 ovl_create_object+0x96/0x290 fs/overlayfs/dir.c:602 lookup_open+0x893/0x1a20 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] path_openat+0x1094/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #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+0x17ec/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:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 do_io_accounting fs/proc/base.c:2750 [inline] proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 proc_single_show+0xeb/0x170 fs/proc/base.c:755 seq_read+0x4e0/0x11c0 fs/seq_file.c:232 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 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.1/16443: #0: 000000001c9164ac (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 #1: 0000000016e352c4 (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 stack backtrace: CPU: 1 PID: 16443 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 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:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 do_io_accounting fs/proc/base.c:2750 [inline] proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 proc_single_show+0xeb/0x170 fs/proc/base.c:755 seq_read+0x4e0/0x11c0 fs/seq_file.c:232 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb7884ce109 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb786e22168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fb7885e1030 RCX: 00007fb7884ce109 RDX: 0000000000002020 RSI: 0000000020004a00 RDI: 0000000000000006 RBP: 00007fb78852805d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb2fdc0df R14: 00007fb786e22300 R15: 0000000000022000 MTD: Attempt to mount non-MTD device "/dev/loop4" cramfs: wrong magic MTD: Attempt to mount non-MTD device "/dev/loop4" cramfs: wrong magic FAT-fs (loop1): Unrecognized mount option "appraise_type=imasig" or missing value audit: type=1804 audit(1656715315.576:453): pid=16551 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir4132228123/syzkaller.F5Owwu/289/bus" dev="sda1" ino=14857 res=1 audit: type=1804 audit(1656715315.686:454): pid=16562 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir4132228123/syzkaller.F5Owwu/289/bus" dev="sda1" ino=14857 res=1 EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue MTD: Attempt to mount non-MTD device "/dev/loop4" FAT-fs (loop1): Unrecognized mount option "appraise_type=imasig" or missing value cramfs: wrong magic BFS-fs: bfs_fill_super(): No BFS filesystem on loop1 (magic=26574c49) EXT4-fs warning (device loop5): ext4_multi_mount_protect:386: Unable to create kmmpd thread for loop5. MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: Mounting image 'rom 5f663c08' through the block layer audit: type=1804 audit(1656715316.646:455): pid=16714 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir4132228123/syzkaller.F5Owwu/291/bus" dev="sda1" ino=14848 res=1 audit: type=1804 audit(1656715316.666:456): pid=16718 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir4132228123/syzkaller.F5Owwu/291/bus" dev="sda1" ino=14848 res=1 MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: Mounting image 'rom 5f663c08' through the block layer netlink: 96 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 96 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 9 bytes leftover after parsing attributes in process `syz-executor.3'. device gretap0 entered promiscuous mode FS-Cache: Duplicate cookie detected FS-Cache: O-cookie c=00000000bdb23706 [p=000000006cfd2b2e fl=222 nc=0 na=1] FS-Cache: O-cookie d=000000001c94139e n=00000000e1db06d1 FS-Cache: O-key=[10] '34323935303033313839' FS-Cache: N-cookie c=000000009e2fc8ca [p=000000006cfd2b2e fl=2 nc=0 na=1] FS-Cache: N-cookie d=000000001c94139e n=00000000f82340de ufs: ufs was compiled with read-only support, can't be mounted as read-write FS-Cache: N-key=[10] '34323935303033313839' ufs: ufs was compiled with read-only support, can't be mounted as read-write audit: type=1804 audit(1656715318.286:457): pid=16907 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir83368876/syzkaller.eVLXkc/869/bus" dev="sda1" ino=14885 res=1 ufs: ufs was compiled with read-only support, can't be mounted as read-write ufs: ufs was compiled with read-only support, can't be mounted as read-write ufs: ufs was compiled with read-only support, can't be mounted as read-write IPVS: ftp: loaded support on port[0] = 21 ufs: ufs was compiled with read-only support, can't be mounted as read-write ufs: ufs was compiled with read-only support, can't be mounted as read-write netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. ufs: ufs was compiled with read-only support, can't be mounted as read-write netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. audit: type=1804 audit(1656715319.276:458): pid=17015 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir83368876/syzkaller.eVLXkc/870/bus" dev="sda1" ino=13893 res=1 A link change request failed with some changes committed already. Interface gretap0 may have been left with an inconsistent configuration, please check. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_CHANGE): tunl0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): gre0: link becomes ready device gretap0 left promiscuous mode IPv6: ADDRCONF(NETDEV_CHANGE): gretap0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): gretap0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): erspan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): ip_vti0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): ip6_vti0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. device Y4`Ҙ left promiscuous mode IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. IPVS: ftp: loaded support on port[0] = 21 A link change request failed with some changes committed already. Interface gretap0 may have been left with an inconsistent configuration, please check. FS-Cache: Duplicate cookie detected FS-Cache: O-cookie c=00000000f1d5b809 [p=000000006cfd2b2e fl=222 nc=0 na=1] FS-Cache: O-cookie d=000000001c94139e n=00000000c79c949f FS-Cache: O-key=[10] '34323935303033363033' FS-Cache: N-cookie c=000000001bc0edfe [p=000000006cfd2b2e fl=2 nc=0 na=1] FS-Cache: N-cookie d=000000001c94139e n=00000000df800f50 FS-Cache: N-key=[10] '34323935303033363033' nla_parse: 19 callbacks suppressed netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. FS-Cache: Duplicate cookie detected FS-Cache: O-cookie c=0000000012c92068 [p=000000006cfd2b2e fl=222 nc=0 na=1] FS-Cache: O-cookie d=000000001c94139e n=000000004c7f905f FS-Cache: O-key=[10] '34323935303033363936' FS-Cache: N-cookie c=00000000fcbb6352 [p=000000006cfd2b2e fl=2 nc=0 na=1] FS-Cache: N-cookie d=000000001c94139e n=00000000db3e4315 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. FS-Cache: N-key=[10] '34323935303033363936' netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. FS-Cache: Duplicate cookie detected FS-Cache: O-cookie c=00000000c40f9794 [p=000000006cfd2b2e fl=222 nc=0 na=1] FS-Cache: O-cookie d=000000001c94139e n=000000006f5a441d FS-Cache: O-key=[10] '34323935303033373335' FS-Cache: N-cookie c=0000000081686f05 [p=000000006cfd2b2e fl=2 nc=0 na=1] FS-Cache: N-cookie d=000000001c94139e n=00000000ccb2d52c FS-Cache: N-key=[10] '34323935303033373335' netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'.