====================================================== loop0: unable to read partition table WARNING: possible circular locking dependency detected 4.14.290-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/11263 is trying to acquire lock: ((&strp->work)){+.+.}, at: [] flush_work+0x88/0x770 kernel/workqueue.c:2887 but task is already holding lock: (sk_lock-AF_INET6){+.+.}, at: [] lock_sock include/net/sock.h:1473 [inline] (sk_lock-AF_INET6){+.+.}, at: [] kcm_attach net/kcm/kcmsock.c:1390 [inline] (sk_lock-AF_INET6){+.+.}, at: [] kcm_attach_ioctl net/kcm/kcmsock.c:1490 [inline] (sk_lock-AF_INET6){+.+.}, at: [] kcm_ioctl+0x328/0xfb0 net/kcm/kcmsock.c:1701 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sk_lock-AF_INET6){+.+.}: lock_sock_nested+0xb7/0x100 net/core/sock.c:2813 do_strp_work net/strparser/strparser.c:415 [inline] strp_work+0x3e/0x100 net/strparser/strparser.c:434 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 -> #0 ((&strp->work)){+.+.}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 flush_work+0xad/0x770 kernel/workqueue.c:2890 __cancel_work_timer+0x321/0x460 kernel/workqueue.c:2965 strp_done+0x53/0xd0 net/strparser/strparser.c:519 kcm_attach net/kcm/kcmsock.c:1429 [inline] kcm_attach_ioctl net/kcm/kcmsock.c:1490 [inline] kcm_ioctl+0x828/0xfb0 net/kcm/kcmsock.c:1701 sock_do_ioctl net/socket.c:974 [inline] sock_ioctl+0x2cc/0x4c0 net/socket.c:1071 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 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: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_INET6); lock((&strp->work)); lock(sk_lock-AF_INET6); lock((&strp->work)); *** DEADLOCK *** 1 lock held by syz-executor.0/11263: #0: (sk_lock-AF_INET6){+.+.}, at: [] lock_sock include/net/sock.h:1473 [inline] #0: (sk_lock-AF_INET6){+.+.}, at: [] kcm_attach net/kcm/kcmsock.c:1390 [inline] #0: (sk_lock-AF_INET6){+.+.}, at: [] kcm_attach_ioctl net/kcm/kcmsock.c:1490 [inline] #0: (sk_lock-AF_INET6){+.+.}, at: [] kcm_ioctl+0x328/0xfb0 net/kcm/kcmsock.c:1701 stack backtrace: CPU: 0 PID: 11263 Comm: syz-executor.0 Not tainted 4.14.290-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 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 flush_work+0xad/0x770 kernel/workqueue.c:2890 __cancel_work_timer+0x321/0x460 kernel/workqueue.c:2965 strp_done+0x53/0xd0 net/strparser/strparser.c:519 kcm_attach net/kcm/kcmsock.c:1429 [inline] kcm_attach_ioctl net/kcm/kcmsock.c:1490 [inline] kcm_ioctl+0x828/0xfb0 net/kcm/kcmsock.c:1701 sock_do_ioctl net/socket.c:974 [inline] sock_ioctl+0x2cc/0x4c0 net/socket.c:1071 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fdc60b06279 RSP: 002b:00007fdc5f3f7168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fdc60c192c0 RCX: 00007fdc60b06279 RDX: 0000000020000180 RSI: 00000000000089e0 RDI: 0000000000000004 RBP: 00007fdc60b60189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe6bdfd03f R14: 00007fdc5f3f7300 R15: 0000000000022000 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) kvm: emulating exchange as write FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) 8021q: adding VLAN 0 to HW filter on device team0 FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) bond0: Enslaving team0 as an active interface with an up link FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) bond0: Releasing backup interface team0 bridge0: port 3(team0) entered blocking state bridge0: port 3(team0) entered disabled state device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode device team0 left promiscuous mode device team_slave_0 left promiscuous mode FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) device team_slave_1 left promiscuous mode bridge0: port 3(team0) entered disabled state 8021q: adding VLAN 0 to HW filter on device team0 bond0: Enslaving team0 as an active interface with an up link syz-executor.1 (11458) used greatest stack depth: 23872 bytes left FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) 8021q: adding VLAN 0 to HW filter on device team0 FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) bond0: Enslaving team0 as an active interface with an up link kauditd_printk_skb: 144 callbacks suppressed audit: type=1800 audit(1660850581.166:156): pid=11512 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.5" name="/" dev="loop5" ino=7 res=0 bond0: Releasing backup interface team0 bridge0: port 3(team0) entered blocking state bridge0: port 3(team0) entered disabled state device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode bond0: Releasing backup interface team0 bridge0: port 3(team0) entered blocking state bridge0: port 3(team0) entered disabled state device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode device team0 left promiscuous mode device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) bridge0: port 3(team0) entered disabled state FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) 8021q: adding VLAN 0 to HW filter on device team0 FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) bond0: Enslaving team0 as an active interface with an up link bond0: Releasing backup interface team0 bridge0: port 3(team0) entered blocking state bridge0: port 3(team0) entered disabled state FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) audit: type=1800 audit(1660850581.916:157): pid=11556 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.5" name="/" dev="loop5" ino=8 res=0 mmap: syz-executor.2 (11668) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. EXT4-fs (loop4): Unrecognized mount option "" or missing value audit: type=1800 audit(1660850583.676:158): pid=11676 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.0" name="SYSV00000000" dev="hugetlbfs" ino=65538 res=0 audit: type=1800 audit(1660850583.966:159): pid=11732 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.0" name="SYSV00000000" dev="hugetlbfs" ino=163845 res=0 unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 audit: type=1800 audit(1660850584.146:160): pid=11739 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.0" name="SYSV00000000" dev="hugetlbfs" ino=262152 res=0 EXT4-fs (loop4): Unrecognized mount option "" or missing value EXT4-fs (loop4): Unrecognized mount option "" or missing value EXT4-fs (loop4): Unrecognized mount option "" or missing value EXT4-fs (loop4): Unrecognized mount option "" or missing value EXT4-fs (loop4): Unrecognized mount option "" or missing value EXT4-fs (loop4): Unrecognized mount option "" or missing value EXT4-fs (loop4): Unrecognized mount option "" or missing value EXT4-fs (loop4): Unrecognized mount option "" or missing value EXT4-fs (loop4): Unrecognized mount option "" or missing value EXT4-fs (loop2): Unrecognized mount option "" or missing value print_req_error: 100 callbacks suppressed print_req_error: I/O error, dev loop2, sector 0 buffer_io_error: 98 callbacks suppressed Buffer I/O error on dev loop2, logical block 0, async page read print_req_error: I/O error, dev loop2, sector 4 Buffer I/O error on dev loop2, logical block 2, async page read print_req_error: I/O error, dev loop2, sector 6 Buffer I/O error on dev loop2, logical block 3, async page read print_req_error: I/O error, dev loop2, sector 0 Buffer I/O error on dev loop2, logical block 0, async page read print_req_error: I/O error, dev loop2, sector 4 Buffer I/O error on dev loop2, logical block 2, async page read print_req_error: I/O error, dev loop2, sector 6 Buffer I/O error on dev loop2, logical block 3, async page read audit: type=1800 audit(1660850586.207:161): pid=11892 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.0" name="SYSV00000000" dev="hugetlbfs" ino=360459 res=0 EXT4-fs (loop2): Unrecognized mount option "" or missing value EXT4-fs (loop2): Unrecognized mount option "" or missing value audit: type=1800 audit(1660850586.407:162): pid=11922 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.0" name="SYSV00000000" dev="hugetlbfs" ino=458766 res=0 ntfs: (device loop4): parse_options(): Unrecognized mount option Ys^.m;\|;b)H591g\6 `Q˗dscJܮi.t~#a'k"s8vOMF5&7?.