Bluetooth: hci3: command 0x040f tx timeout ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/21503 is trying to acquire lock: 00000000245f26c8 (&ovl_i_mutex_dir_key[depth]){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] 00000000245f26c8 (&ovl_i_mutex_dir_key[depth]){++++}, at: lookup_slow fs/namei.c:1688 [inline] 00000000245f26c8 (&ovl_i_mutex_dir_key[depth]){++++}, at: walk_component+0x798/0xda0 fs/namei.c:1811 but task is already holding lock: 0000000075eac758 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1419 [inline] 0000000075eac758 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file+0x38c/0x2360 fs/exec.c:1762 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&sig->cred_guard_mutex){+.+.}: 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 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 do_preadv fs/read_write.c:1071 [inline] __do_sys_preadv fs/read_write.c:1121 [inline] __se_sys_preadv fs/read_write.c:1116 [inline] __x64_sys_preadv+0x22b/0x310 fs/read_write.c:1116 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (&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 -> #1 (sb_writers#3){.+.+}: sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:360 ovl_xattr_set+0x53/0x600 fs/overlayfs/inode.c:338 __vfs_removexattr+0xf3/0x160 fs/xattr.c:413 __vfs_removexattr_locked+0x15c/0x340 fs/xattr.c:445 vfs_removexattr+0xc1/0x240 fs/xattr.c:466 removexattr+0xc8/0x120 fs/xattr.c:760 path_removexattr+0x147/0x160 fs/xattr.c:774 __do_sys_lremovexattr fs/xattr.c:794 [inline] __se_sys_lremovexattr fs/xattr.c:791 [inline] __x64_sys_lremovexattr+0x52/0x70 fs/xattr.c:791 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&ovl_i_mutex_dir_key[depth]){++++}: down_read+0x36/0x80 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:758 [inline] lookup_slow fs/namei.c:1688 [inline] walk_component+0x798/0xda0 fs/namei.c:1811 link_path_walk.part.0+0x901/0x1230 fs/namei.c:2142 link_path_walk fs/namei.c:2073 [inline] path_openat+0x1db/0x2df0 fs/namei.c:3536 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 other info that might help us debug this: Chain exists of: &ovl_i_mutex_dir_key[depth] --> &p->lock --> &sig->cred_guard_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sig->cred_guard_mutex); lock(&p->lock); lock(&sig->cred_guard_mutex); lock(&ovl_i_mutex_dir_key[depth]); *** DEADLOCK *** 1 lock held by syz-executor.4/21503: #0: 0000000075eac758 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1419 [inline] #0: 0000000075eac758 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file+0x38c/0x2360 fs/exec.c:1762 stack backtrace: CPU: 1 PID: 21503 Comm: syz-executor.4 Not tainted 4.19.211-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 down_read+0x36/0x80 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:758 [inline] lookup_slow fs/namei.c:1688 [inline] walk_component+0x798/0xda0 fs/namei.c:1811 link_path_walk.part.0+0x901/0x1230 fs/namei.c:2142 link_path_walk fs/namei.c:2073 [inline] path_openat+0x1db/0x2df0 fs/namei.c:3536 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 RIP: 0033:0x7f911785bae9 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:00007f91167b0188 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00007f911796f028 RCX: 00007f911785bae9 RDX: 0000000020000480 RSI: 0000000020000380 RDI: 00000000200000c0 RBP: 00007f91178b5ff7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc4e297b2f R14: 00007f91167b0300 R15: 0000000000022000 netlink: 96 bytes leftover after parsing attributes in process `syz-executor.3'. IPVS: ftp: loaded support on port[0] = 21 overlayfs: failed to resolve './file1': -2 overlayfs: failed to resolve './file1': -2 netlink: 96 bytes leftover after parsing attributes in process `syz-executor.3'. Bluetooth: hci3: command 0x0419 tx timeout IPVS: ftp: loaded support on port[0] = 21 netlink: 96 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 96 bytes leftover after parsing attributes in process `syz-executor.4'. IPVS: ftp: loaded support on port[0] = 21 x_tables: duplicate underflow at hook 2 IPVS: ftp: loaded support on port[0] = 21 overlayfs: failed to resolve './file0': -2 netlink: 96 bytes leftover after parsing attributes in process `syz-executor.2'. audit: type=1800 audit(1638763724.728:199): pid=21672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.5" name="bus" dev="sda1" ino=14809 res=0 netlink: 96 bytes leftover after parsing attributes in process `syz-executor.1'. ptrace attach of "/root/syz-executor.2 exec"[18951] was attempted by "'}Usv~5\x0a\x09\x22nQ`S.n(-V3M/,c锈\x0c$#b1YoyI?1%M2ع;/{.ՂPpm\x1bß%ct'e-ȞI`it^hpøSss;x\x07SQBxqKSGȇxDTUU]n\x5cjHWs[iov7+:\x1bX=ֶip\x22j)gGM:DloZ$;D~˺{^M(.^-zT\x1b6#ڀ\x0dTaGgHb!a\x0dZӴr!K ](4 #9Hq.ݒ\x09֝pu\x22N>W s]sU{}]LmFD6AhNE^:=q overlayfs: unrecognized mount option "upperdir=./bus" or missing value overlayfs: unrecognized mount option "upperdir=./bus" or missing value netlink: 96 bytes leftover after parsing attributes in process `syz-executor.2'. wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue vxfs: WRONG superblock magic 00000000 at 1 vxfs: WRONG superblock magic 00000000 at 8 EXT4-fs error (device loop2): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters vxfs: can't find superblock. netlink: 96 bytes leftover after parsing attributes in process `syz-executor.4'. overlayfs: failed to resolve './file000000000000000000000006': -2 overlayfs: unrecognized mount option "lowedir=" or missing value overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. vxfs: WRONG superblock magic 00000000 at 1 vxfs: WRONG superblock magic 00000000 at 8 vxfs: can't find superblock. netlink: 96 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 96 bytes leftover after parsing attributes in process `syz-executor.4'. overlayfs: unrecognized mount option "lowedir=" or missing value overlayfs: filesystem on './bus' not supported as upperdir overlayfs: unrecognized mount option "smackfsdef=}" or missing value FAT-fs (loop4): Unrecognized mount option "func=MMAP_CHECK" or missing value audit: type=1804 audit(1638763725.758:200): pid=21782 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir803255699/syzkaller.QQQY9b/185/bus" dev="sda1" ino=14273 res=1 overlayfs: unrecognized mount option "smackfsdef=}" or missing value overlayfs: filesystem on './bus' not supported as upperdir ptrace attach of "/root/syz-executor.5 exec"[20769] was attempted by "'}Usv~5\x0a\x09\x22nQ`S.n(-V3M/,c锈\x0c$#b1YoyI?1%M2ع;/{.ՂPpm\x1bß%ct'e-ȞI`it^hpøSss;x\x07SQBxqKSGȇxDTUU]n\x5cjHWs[iov7+:\x1bX=ֶip\x22j)gGM:DloZ$;D~˺{^M(.^-zT\x1b6#ڀ\x0dTaGgHb!a\x0dZӴr!K ](4 #9Hq.ݒ\x09֝pu\x22N>W s]sU{}]LmFD6AhNE^:=q FAT-fs (loop4): Unrecognized mount option "func=MMAP_CHECK" or missing value audit: type=1804 audit(1638763725.788:201): pid=21782 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir803255699/syzkaller.QQQY9b/185/bus" dev="sda1" ino=14273 res=1 audit: type=1804 audit(1638763725.788:202): pid=21782 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir803255699/syzkaller.QQQY9b/185/bus" dev="sda1" ino=14273 res=1 audit: type=1804 audit(1638763725.978:203): pid=21782 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir803255699/syzkaller.QQQY9b/185/bus" dev="sda1" ino=14273 res=1 audit: type=1804 audit(1638763725.988:204): pid=21797 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir803255699/syzkaller.QQQY9b/185/bus" dev="sda1" ino=14273 res=1 overlayfs: filesystem on './bus' not supported as upperdir audit: type=1800 audit(1638763726.268:205): pid=21742 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.2" name="bus" dev="sda1" ino=13942 res=0 IPVS: ftp: loaded support on port[0] = 21 overlayfs: failed to resolve './file0|{M]v={Fy悿)nO|b |6~!"lϿ{': -2 IPVS: ftp: loaded support on port[0] = 21 audit: type=1800 audit(1638763726.458:206): pid=21832 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.0" name="bus" dev="sda1" ino=14424 res=0 overlayfs: failed to resolve './file0|{M]v={Fy悿)nO|b |6~!"lϿ{': -2 overlayfs: filesystem on './bus' not supported as upperdir IPVS: ftp: loaded support on port[0] = 21 nla_parse: 1 callbacks suppressed netlink: 96 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 96 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. audit: type=1800 audit(1638763727.128:207): pid=21918 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.1" name="bus" dev="sda1" ino=14148 res=0 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. overlayfs: filesystem on './bus' not supported as upperdir netlink: 96 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 96 bytes leftover after parsing attributes in process `syz-executor.4'. overlayfs: unrecognized mount option "" or missing value netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 96 bytes leftover after parsing attributes in process `syz-executor.4'. overlayfs: unrecognized mount option "" or missing value UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) overlayfs: missing 'lowerdir' hfs: unable to parse mount options overlayfs: missing 'lowerdir' hfs: unable to parse mount options audit: type=1800 audit(1638763728.208:208): pid=22095 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.2" name="bus" dev="sda1" ino=14693 res=0 overlayfs: missing 'lowerdir' overlayfs: filesystem on './bus' not supported as upperdir hfs: unable to parse mount options overlayfs: filesystem on './bus' not supported as upperdir MTD: Attempt to mount non-MTD device "/dev/loop5" hfs: can't find a HFS filesystem on dev loop4 cramfs: wrong magic overlayfs: unrecognized mount option "upprdir=./b " or missing value overlayfs: unrecognized mount option "upprdir=./b " or missing value Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! File: /root/syzkaller-testdir803255699/syzkaller.QQQY9b/195/bus PID: 22218 Comm: syz-executor.1 ieee80211 phy38: Selected rate control algorithm 'minstrel_ht' kauditd_printk_skb: 9 callbacks suppressed audit: type=1800 audit(1638763729.838:218): pid=22214 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.2" name="cgroup.controllers" dev="sda1" ino=14426 res=0 overlayfs: unrecognized mount option "workdir0" or missing value overlayfs: unrecognized mount option "workdir0" or missing value overlayfs: unrecognized mount option "dont_appraise" or missing value overlayfs: unrecognized mount option "dont_appraise" or missing value overlayfs: unrecognized mount option "|pperdir=./busle1" or missing value Unknown ioctl -805268418 overlayfs: unrecognized mount option "|pperdir=./busle1" or missing value Unknown ioctl -805268418 netlink: 'syz-executor.1': attribute type 29 has an invalid length. overlayfs: filesystem on './bus' not supported as upperdir