./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1122203621 <...> forked to background, child pid 3184 no interfaces have a carrier [ 23.456383][ T3185] 8021q: adding VLAN 0 to HW filter on device bond0 [ 23.466571][ T3185] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.145' (ECDSA) to the list of known hosts. execve("./syz-executor1122203621", ["./syz-executor1122203621"], 0x7ffeb388ff80 /* 10 vars */) = 0 brk(NULL) = 0x55555605e000 brk(0x55555605ec40) = 0x55555605ec40 arch_prctl(ARCH_SET_FS, 0x55555605e300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 set_tid_address(0x55555605e5d0) = 3612 set_robust_list(0x55555605e5e0, 24) = 0 rt_sigaction(SIGRTMIN, {sa_handler=0x7ff0356a9730, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7ff0356a9e00}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7ff0356a97d0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7ff0356a9e00}, NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1122203621", 4096) = 28 brk(0x55555607fc40) = 0x55555607fc40 brk(0x555556080000) = 0x555556080000 mprotect(0x7ff03576a000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3613 attached , child_tidptr=0x55555605e5d0) = 3613 [pid 3613] set_robust_list(0x55555605e5e0, 24) = 0 [pid 3613] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 3613] socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI) = 3 [pid 3613] openat(AT_FDCWD, "/dev/vhci", O_RDWR) = 4 [pid 3613] dup2(4, 202) = 202 [pid 3613] close(4) = 0 [pid 3613] read(202, "\xff\x00\x00\x00", 4) = 4 [pid 3613] mmap(NULL, 8392704, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7ff034e99000 [pid 3613] mprotect(0x7ff034e9a000, 8388608, PROT_READ|PROT_WRITE) = 0 [pid 3613] clone(child_stack=0x7ff0356993f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2], tls=0x7ff035699700, child_tidptr=0x7ff0356999d0) = 2 [pid 3613] ioctl(3, HCIDEVUP./strace-static-x86_64: Process 3617 attached [pid 3617] set_robust_list(0x7ff0356999e0, 24) = 0 [pid 3617] read(202, "\x01\x03\x0c\x00", 1024) = 4 [pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x03\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255 [pid 3617] read(202, "\x01\x03\x10\x00", 1024) = 4 [pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x03\x10", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255 [pid 3617] read(202, "\x01\x01\x10\x00", 1024) = 4 [pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x01\x10", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255 [pid 3617] read(202, "\x01\x09\x10\x00", 1024) = 4 [pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\x0a", iov_len=2}, {iov_base="\x01\x09\x10", iov_len=3}, {iov_base="\x00\xaa\xaa\xaa\xaa\xaa\xaa", iov_len=7}], 4) = 13 [pid 3617] read(202, "\x01\x05\x10\x00", 1024) = 4 [pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\x0b", iov_len=2}, {iov_base="\x01\x05\x10", iov_len=3}, {iov_base="\x00\xfd\x03\x60\x04\x00\x06\x00", iov_len=8}], 4) = 14 [pid 3617] read(202, "\x01\x23\x0c\x00", 1024) = 4 [pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x23\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255 [pid 3617] read(202, "\x01\x14\x0c\x00", 1024) = 4 [pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x14\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255 [pid 3617] read(202, "\x01\x25\x0c\x00", 1024) = 4 [pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x25\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255 [pid 3617] read(202, "\x01\x38\x0c\x00", 1024) = 4 [pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x38\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255 syzkaller login: [ 45.184985][ T3616] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 45.194017][ T3616] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 45.202718][ T3616] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 45.213855][ T3616] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 45.223467][ T3616] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3 [pid 3617] read(202, "\x01\x39\x0c\x00", 1024) = 4 [pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x39\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255 [pid 3617] read(202, "\x01\x16\x0c\x02\x00\x7d", 1024) = 6 [pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\xfc", iov_len=2}, {iov_base="\x01\x16\x0c", iov_len=3}, {iov_base="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=249}], 4) = 255 [pid 3617] read(202, [pid 3613] <... ioctl resumed>, 0) = -1 EALREADY (Operation already in progress) [pid 3613] ioctl(3, HCISETSCAN [pid 3617] <... read resumed>"\x01\x1a\x0c\x01\x02", 1024) = 5 [pid 3617] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x0e\x04", iov_len=2}, {iov_base="\x01\x1a\x0c", iov_len=3}, {iov_base="\x00", iov_len=1}], 4) = 7 [pid 3613] <... ioctl resumed>, 0x7ffec2782214) = 0 [pid 3617] madvise(0x7ff034e99000, 8372224, MADV_DONTNEED [pid 3613] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x04\x0a", iov_len=2}, {iov_base="\xaa\xaa\xaa\xaa\xaa\x10\x00\x00\x00\x01", iov_len=10}], 3 [pid 3617] <... madvise resumed>) = 0 [pid 3613] <... writev resumed>) = 13 [pid 3617] exit(0 [pid 3613] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x03\x0b", iov_len=2}, {iov_base="\x00\xc8\x00\xaa\xaa\xaa\xaa\xaa\x10\x01\x00", iov_len=11}], 3 [pid 3617] <... exit resumed>) = ? [pid 3613] <... writev resumed>) = 14 [pid 3617] +++ exited with 0 +++ [pid 3613] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\v\v", iov_len=2}, {iov_base="\x00\xc8\x00\x00\x00\x00\x00\x00\x00\x00\x00", iov_len=11}], 3) = 14 [pid 3613] writev(202, [{iov_base="\x04", iov_len=1}, {iov_base="\x3e\x13", iov_len=2}, {iov_base="\x01\x00\xc9\x00\x01\x00\xaa\xaa\xaa\xaa\xaa\x11\x00\x00\x00\x00\x00\x00\x00", iov_len=19}], 3) = 22 [pid 3613] close(3) = 0 [pid 3613] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3613] setsid() = 1 [pid 3613] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 3613] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 3613] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 3613] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 3613] prlimit64(0, RLIMIT_CORE, {rlim_cur=0, rlim_max=0}, NULL) = 0 [pid 3613] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 3613] unshare(CLONE_NEWNS) = 0 [pid 3613] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 3613] unshare(CLONE_NEWIPC) = 0 [pid 3613] unshare(CLONE_NEWCGROUP) = 0 [pid 3613] unshare(CLONE_NEWUTS) = 0 [pid 3613] unshare(CLONE_SYSVSEM) = 0 [pid 3613] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3613] write(3, "16777216", 8) = 8 [pid 3613] close(3) = 0 [pid 3613] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 3613] write(3, "536870912", 9) = 9 [pid 3613] close(3) = 0 [pid 3613] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3613] write(3, "1024", 4) = 4 [pid 3613] close(3) = 0 [pid 3613] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3613] write(3, "8192", 4) = 4 [pid 3613] close(3) = 0 [pid 3613] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3613] write(3, "1024", 4) = 4 [pid 3613] close(3) = 0 [pid 3613] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 3613] write(3, "1024", 4) = 4 [pid 3613] close(3) = 0 [pid 3613] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 3613] write(3, "1024 1048576 500 1024", 21) = 21 [pid 3613] close(3) = 0 [pid 3613] getpid() = 1 [pid 3613] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 2 [pid 3613] unshare(CLONE_NEWNET) = 0 [pid 3613] openat(AT_FDCWD, "/proc/sys/net/ipv4/ping_group_range", O_WRONLY|O_CLOEXEC) = 3 [pid 3613] write(3, "0 65535", 7) = 7 [pid 3613] close(3) = 0 [pid 3613] mkdir("/dev/binderfs", 0777) = 0 [pid 3613] mount("binder", "/dev/binderfs", "binder", 0, NULL) = 0 [pid 3613] symlink("/dev/binderfs", "./binderfs") = 0 [pid 3613] write(202, "\x04\x0e\x04\x00\x28\x20\x80", 7) = 7 [pid 3613] write(202, "\x02\xc8\x00\x0c\x00\x08\x00\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00", 17) = 17 [pid 3613] exit_group(1) = ? [ 45.322944][ T3613] [ 45.325323][ T3613] ========================= [ 45.329806][ T3613] WARNING: held lock freed! [ 45.334298][ T3613] 6.0.0-rc6-syzkaller-00281-g1707c39ae309 #0 Not tainted [ 45.341311][ T3613] ------------------------- [ 45.345813][ T3613] syz-executor112/3613 is freeing memory ffff8880211f3000-ffff8880211f37ff, with a lock still held there! [ 45.357087][ T3613] ffff8880211f3520 (&chan->lock/1){+.+.}-{3:3}, at: l2cap_conn_del+0x3b5/0x7b0 [ 45.366156][ T3613] 5 locks held by syz-executor112/3613: [ 45.371690][ T3613] #0: ffff888026034fd0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x25/0x70 [ 45.381245][ T3613] #1: ffff888026034078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x268/0x1130 [ 45.390928][ T3613] #2: ffffffff8d9d3e28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xd5/0x260 [ 45.400916][ T3613] #3: ffff8880212372d8 (&conn->chan_lock){+.+.}-{3:3}, at: l2cap_conn_del+0x2ef/0x7b0 [ 45.410551][ T3613] #4: ffff8880211f3520 (&chan->lock/1){+.+.}-{3:3}, at: l2cap_conn_del+0x3b5/0x7b0 [ 45.419935][ T3613] [ 45.419935][ T3613] stack backtrace: [ 45.425824][ T3613] CPU: 0 PID: 3613 Comm: syz-executor112 Not tainted 6.0.0-rc6-syzkaller-00281-g1707c39ae309 #0 [ 45.436232][ T3613] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 [ 45.446286][ T3613] Call Trace: [ 45.449555][ T3613] [ 45.452480][ T3613] dump_stack_lvl+0xcd/0x134 [ 45.457065][ T3613] debug_check_no_locks_freed.cold+0x9d/0xa9 [ 45.463037][ T3613] slab_free_freelist_hook+0x73/0x1c0 [ 45.468394][ T3613] ? l2cap_chan_put+0x22a/0x2d0 [ 45.473229][ T3613] kfree+0xe2/0x580 [ 45.477022][ T3613] ? skb_dequeue+0x125/0x180 [ 45.481596][ T3613] l2cap_chan_put+0x22a/0x2d0 [ 45.486258][ T3613] l2cap_conn_del+0x3fc/0x7b0 [ 45.490919][ T3613] ? l2cap_conn_del+0x7b0/0x7b0 [ 45.495749][ T3613] l2cap_disconn_cfm+0x8c/0xc0 [ 45.500519][ T3613] hci_conn_hash_flush+0x122/0x260 [ 45.505613][ T3613] hci_dev_close_sync+0x55d/0x1130 [ 45.510709][ T3613] ? hci_dev_open_sync+0x2190/0x2190 [ 45.515977][ T3613] ? kfree+0xe2/0x580 [ 45.519949][ T3613] hci_dev_do_close+0x2d/0x70 [ 45.524623][ T3613] hci_unregister_dev+0x17f/0x4e0 [ 45.529629][ T3613] vhci_release+0x7c/0xf0 [ 45.533941][ T3613] __fput+0x277/0x9d0 [ 45.537907][ T3613] ? vhci_close_dev+0x50/0x50 [ 45.542566][ T3613] task_work_run+0xdd/0x1a0 [ 45.547051][ T3613] do_exit+0xad5/0x29b0 [ 45.551194][ T3613] ? mm_update_next_owner+0x7a0/0x7a0 [ 45.556546][ T3613] ? _raw_spin_unlock_irq+0x1f/0x40 [ 45.561727][ T3613] ? _raw_spin_unlock_irq+0x1f/0x40 [ 45.566908][ T3613] do_group_exit+0xd2/0x2f0 [ 45.571394][ T3613] __x64_sys_exit_group+0x3a/0x50 [ 45.576400][ T3613] do_syscall_64+0x35/0xb0 [ 45.580798][ T3613] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 45.586867][ T3613] RIP: 0033:0x7ff0356e6509 [ 45.591267][ T3613] Code: Unable to access opcode bytes at RIP 0x7ff0356e64df. [ 45.598624][ T3613] RSP: 002b:00007ffec27821a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 45.607014][ T3613] RAX: ffffffffffffffda RBX: 00007ff035770390 RCX: 00007ff0356e6509 [ 45.615142][ T3613] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 45.623099][ T3613] RBP: 0000000000000001 R08: ffffffffffffffb8 R09: 00007ffec2781c70 [ 45.631075][ T3613] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff035770390 [ 45.639027][ T3613] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 45.646983][ T3613] [ 45.650173][ T3613] ================================================================== [ 45.658281][ T3613] BUG: KASAN: use-after-free in __mutex_unlock_slowpath+0xa6/0x5e0 [ 45.666183][ T3613] Read of size 8 at addr ffff8880211f34b8 by task syz-executor112/3613 [ 45.674407][ T3613] [ 45.676721][ T3613] CPU: 0 PID: 3613 Comm: syz-executor112 Not tainted 6.0.0-rc6-syzkaller-00281-g1707c39ae309 #0 [ 45.687127][ T3613] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 [ 45.697174][ T3613] Call Trace: [ 45.700445][ T3613] [ 45.703368][ T3613] dump_stack_lvl+0xcd/0x134 [ 45.707959][ T3613] print_report.cold+0x2ba/0x719 [ 45.712893][ T3613] ? __mutex_unlock_slowpath+0xa6/0x5e0 [ 45.718435][ T3613] kasan_report+0xb1/0x1e0 [ 45.723283][ T3613] ? __mutex_unlock_slowpath+0xa6/0x5e0 [ 45.728823][ T3613] kasan_check_range+0x13d/0x180 [ 45.733759][ T3613] __mutex_unlock_slowpath+0xa6/0x5e0 [ 45.739128][ T3613] ? slab_free_freelist_hook+0x8b/0x1c0 [ 45.744665][ T3613] ? wait_for_completion_io_timeout+0x20/0x20 [ 45.750730][ T3613] ? l2cap_chan_put+0x22a/0x2d0 [ 45.755573][ T3613] ? kfree+0xe2/0x580 [ 45.759633][ T3613] ? skb_dequeue+0x125/0x180 [ 45.764395][ T3613] l2cap_conn_del+0x404/0x7b0 [ 45.769068][ T3613] ? l2cap_conn_del+0x7b0/0x7b0 [ 45.773909][ T3613] l2cap_disconn_cfm+0x8c/0xc0 [ 45.778664][ T3613] hci_conn_hash_flush+0x122/0x260 [ 45.783773][ T3613] hci_dev_close_sync+0x55d/0x1130 [ 45.788884][ T3613] ? hci_dev_open_sync+0x2190/0x2190 [ 45.794247][ T3613] ? kfree+0xe2/0x580 [ 45.798221][ T3613] hci_dev_do_close+0x2d/0x70 [ 45.802895][ T3613] hci_unregister_dev+0x17f/0x4e0 [ 45.807923][ T3613] vhci_release+0x7c/0xf0 [ 45.812259][ T3613] __fput+0x277/0x9d0 [ 45.816243][ T3613] ? vhci_close_dev+0x50/0x50 [ 45.820920][ T3613] task_work_run+0xdd/0x1a0 [ 45.825420][ T3613] do_exit+0xad5/0x29b0 [ 45.829572][ T3613] ? mm_update_next_owner+0x7a0/0x7a0 [ 45.834945][ T3613] ? _raw_spin_unlock_irq+0x1f/0x40 [ 45.840140][ T3613] ? _raw_spin_unlock_irq+0x1f/0x40 [ 45.845333][ T3613] do_group_exit+0xd2/0x2f0 [ 45.849839][ T3613] __x64_sys_exit_group+0x3a/0x50 [ 45.854865][ T3613] do_syscall_64+0x35/0xb0 [ 45.859277][ T3613] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 45.865171][ T3613] RIP: 0033:0x7ff0356e6509 [ 45.869581][ T3613] Code: Unable to access opcode bytes at RIP 0x7ff0356e64df. [ 45.876934][ T3613] RSP: 002b:00007ffec27821a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 45.885348][ T3613] RAX: ffffffffffffffda RBX: 00007ff035770390 RCX: 00007ff0356e6509 [ 45.893317][ T3613] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 45.901372][ T3613] RBP: 0000000000000001 R08: ffffffffffffffb8 R09: 00007ffec2781c70 [ 45.909338][ T3613] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff035770390 [ 45.917315][ T3613] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 45.925290][ T3613] [ 45.928298][ T3613] [ 45.930617][ T3613] Allocated by task 3616: [ 45.934937][ T3613] kasan_save_stack+0x1e/0x40 [ 45.939612][ T3613] __kasan_kmalloc+0xa9/0xd0 [ 45.944194][ T3613] l2cap_chan_create+0x40/0x570 [ 45.949037][ T3613] amp_mgr_create+0x8f/0x960 [ 45.953789][ T3613] a2mp_channel_create+0x7d/0x150 [ 45.959061][ T3613] l2cap_recv_frame+0x48e3/0x8d90 [ 45.964075][ T3613] l2cap_recv_acldata+0xaa6/0xc00 [ 45.969090][ T3613] hci_rx_work+0x705/0x1230 [ 45.973584][ T3613] process_one_work+0x991/0x1610 [ 45.978515][ T3613] worker_thread+0x665/0x1080 [ 45.983189][ T3613] kthread+0x2e4/0x3a0 [ 45.987253][ T3613] ret_from_fork+0x1f/0x30 [ 45.991752][ T3613] [ 45.994071][ T3613] Freed by task 3613: [ 45.998046][ T3613] kasan_save_stack+0x1e/0x40 [ 46.002729][ T3613] kasan_set_track+0x21/0x30 [ 46.007315][ T3613] kasan_set_free_info+0x20/0x30 [ 46.012253][ T3613] ____kasan_slab_free+0x166/0x1c0 [ 46.017369][ T3613] slab_free_freelist_hook+0x8b/0x1c0 [ 46.022741][ T3613] kfree+0xe2/0x580 [ 46.026543][ T3613] l2cap_chan_put+0x22a/0x2d0 [ 46.031215][ T3613] l2cap_conn_del+0x3fc/0x7b0 [ 46.035884][ T3613] l2cap_disconn_cfm+0x8c/0xc0 [ 46.040640][ T3613] hci_conn_hash_flush+0x122/0x260 [ 46.045743][ T3613] hci_dev_close_sync+0x55d/0x1130 [ 46.050851][ T3613] hci_dev_do_close+0x2d/0x70 [ 46.055610][ T3613] hci_unregister_dev+0x17f/0x4e0 [ 46.060630][ T3613] vhci_release+0x7c/0xf0 [ 46.064956][ T3613] __fput+0x277/0x9d0 [ 46.068934][ T3613] task_work_run+0xdd/0x1a0 [ 46.073436][ T3613] do_exit+0xad5/0x29b0 [ 46.077587][ T3613] do_group_exit+0xd2/0x2f0 [ 46.082081][ T3613] __x64_sys_exit_group+0x3a/0x50 [ 46.087097][ T3613] do_syscall_64+0x35/0xb0 [ 46.091507][ T3613] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 46.097393][ T3613] [ 46.099705][ T3613] The buggy address belongs to the object at ffff8880211f3000 [ 46.099705][ T3613] which belongs to the cache kmalloc-2k of size 2048 [ 46.113846][ T3613] The buggy address is located 1208 bytes inside of [ 46.113846][ T3613] 2048-byte region [ffff8880211f3000, ffff8880211f3800) [ 46.127300][ T3613] [ 46.129616][ T3613] The buggy address belongs to the physical page: [ 46.136022][ T3613] page:ffffea0000847c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x211f0 [ 46.146258][ T3613] head:ffffea0000847c00 order:3 compound_mapcount:0 compound_pincount:0 [ 46.154582][ T3613] flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) [ 46.162569][ T3613] raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888011842000 [ 46.171238][ T3613] raw: 0000000000000000 0000000080080008 00000001ffffffff 0000000000000000 [ 46.179809][ T3613] page dumped because: kasan: bad access detected [ 46.186386][ T3613] page_owner tracks the page as allocated [ 46.192183][ T3613] page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3613, tgid 3613 (syz-executor112), ts 45285232401, free_ts 45261022780 [ 46.213813][ T3613] get_page_from_freelist+0x109b/0x2ce0 [ 46.219365][ T3613] __alloc_pages+0x1c7/0x510 [ 46.223961][ T3613] alloc_pages+0x1a6/0x270 [ 46.228377][ T3613] allocate_slab+0x27e/0x3d0 [ 46.232967][ T3613] ___slab_alloc+0x7f1/0xe10 [ 46.237553][ T3613] __slab_alloc.constprop.0+0x4d/0xa0 [ 46.242920][ T3613] __kmalloc+0x32b/0x340 [ 46.247157][ T3613] ops_init+0xfb/0x470 [ 46.251217][ T3613] setup_net+0x5d1/0xc50 [ 46.255450][ T3613] copy_net_ns+0x318/0x760 [ 46.259858][ T3613] create_new_namespaces+0x3f6/0xb20 [ 46.265141][ T3613] unshare_nsproxy_namespaces+0xc1/0x1f0 [ 46.270767][ T3613] ksys_unshare+0x445/0x920 [ 46.275260][ T3613] __x64_sys_unshare+0x2d/0x40 [ 46.280014][ T3613] do_syscall_64+0x35/0xb0 [ 46.284424][ T3613] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 46.290311][ T3613] page last free stack trace: [ 46.294967][ T3613] free_pcp_prepare+0x5e4/0xd20 [ 46.299816][ T3613] free_unref_page+0x19/0x4d0 [ 46.304485][ T3613] __unfreeze_partials+0x17c/0x1a0 [ 46.309588][ T3613] qlist_free_all+0x6a/0x170 [ 46.314181][ T3613] kasan_quarantine_reduce+0x180/0x200 [ 46.319640][ T3613] __kasan_slab_alloc+0xa2/0xc0 [ 46.324486][ T3613] kmem_cache_alloc_trace+0x2c0/0x3e0 [ 46.329876][ T3613] tomoyo_init_log+0x18a/0x1ed0 [ 46.334722][ T3613] tomoyo_supervisor+0x34d/0xf00 [ 46.339650][ T3613] tomoyo_path_permission+0x270/0x3a0 [ 46.345012][ T3613] tomoyo_check_open_permission+0x30f/0x380 [ 46.350897][ T3613] tomoyo_file_open+0x9d/0xc0 [ 46.355562][ T3613] security_file_open+0x45/0xb0 [ 46.360400][ T3613] do_dentry_open+0x349/0x13a0 [ 46.365156][ T3613] path_openat+0x1c92/0x28f0 [ 46.369739][ T3613] do_filp_open+0x1b6/0x400 [ 46.374234][ T3613] [ 46.376544][ T3613] Memory state around the buggy address: [ 46.382158][ T3613] ffff8880211f3380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.390209][ T3613] ffff8880211f3400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.398269][ T3613] >ffff8880211f3480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.406326][ T3613] ^ [ 46.412213][ T3613] ffff8880211f3500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.420353][ T3613] ffff8880211f3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.428486][ T3613] ================================================================== [ 46.436917][ T3613] Kernel panic - not syncing: panic_on_warn set ... [ 46.443534][ T3613] CPU: 0 PID: 3613 Comm: syz-executor112 Not tainted 6.0.0-rc6-syzkaller-00281-g1707c39ae309 #0 [ 46.454089][ T3613] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 [ 46.464365][ T3613] Call Trace: [ 46.467644][ T3613] [ 46.470567][ T3613] dump_stack_lvl+0xcd/0x134 [ 46.475164][ T3613] panic+0x2c8/0x627 [ 46.479059][ T3613] ? panic_print_sys_info.part.0+0x10b/0x10b [ 46.485045][ T3613] ? preempt_schedule_common+0x59/0xc0 [ 46.490507][ T3613] ? preempt_schedule_thunk+0x16/0x18 [ 46.495879][ T3613] ? __mutex_unlock_slowpath+0xa6/0x5e0 [ 46.501424][ T3613] end_report.part.0+0x3f/0x7c [ 46.506190][ T3613] kasan_report.cold+0xa/0xf [ 46.510779][ T3613] ? __mutex_unlock_slowpath+0xa6/0x5e0 [ 46.516326][ T3613] kasan_check_range+0x13d/0x180 [ 46.521270][ T3613] __mutex_unlock_slowpath+0xa6/0x5e0 [ 46.526817][ T3613] ? slab_free_freelist_hook+0x8b/0x1c0 [ 46.532362][ T3613] ? wait_for_completion_io_timeout+0x20/0x20 [ 46.538430][ T3613] ? l2cap_chan_put+0x22a/0x2d0 [ 46.543283][ T3613] ? kfree+0xe2/0x580 [ 46.547260][ T3613] ? skb_dequeue+0x125/0x180 [ 46.551848][ T3613] l2cap_conn_del+0x404/0x7b0 [ 46.556525][ T3613] ? l2cap_conn_del+0x7b0/0x7b0 [ 46.561369][ T3613] l2cap_disconn_cfm+0x8c/0xc0 [ 46.566130][ T3613] hci_conn_hash_flush+0x122/0x260 [ 46.571411][ T3613] hci_dev_close_sync+0x55d/0x1130 [ 46.576525][ T3613] ? hci_dev_open_sync+0x2190/0x2190 [ 46.581809][ T3613] ? kfree+0xe2/0x580 [ 46.585792][ T3613] hci_dev_do_close+0x2d/0x70 [ 46.590473][ T3613] hci_unregister_dev+0x17f/0x4e0 [ 46.595492][ T3613] vhci_release+0x7c/0xf0 [ 46.599816][ T3613] __fput+0x277/0x9d0 [ 46.603797][ T3613] ? vhci_close_dev+0x50/0x50 [ 46.608472][ T3613] task_work_run+0xdd/0x1a0 [ 46.612978][ T3613] do_exit+0xad5/0x29b0 [ 46.617132][ T3613] ? mm_update_next_owner+0x7a0/0x7a0 [ 46.622502][ T3613] ? _raw_spin_unlock_irq+0x1f/0x40 [ 46.627701][ T3613] ? _raw_spin_unlock_irq+0x1f/0x40 [ 46.632898][ T3613] do_group_exit+0xd2/0x2f0 [ 46.637398][ T3613] __x64_sys_exit_group+0x3a/0x50 [ 46.642415][ T3613] do_syscall_64+0x35/0xb0 [ 46.646824][ T3613] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 46.652711][ T3613] RIP: 0033:0x7ff0356e6509 [ 46.657117][ T3613] Code: Unable to access opcode bytes at RIP 0x7ff0356e64df. [ 46.664465][ T3613] RSP: 002b:00007ffec27821a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 46.672866][ T3613] RAX: ffffffffffffffda RBX: 00007ff035770390 RCX: 00007ff0356e6509 [ 46.680828][ T3613] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 46.688788][ T3613] RBP: 0000000000000001 R08: ffffffffffffffb8 R09: 00007ffec2781c70 [ 46.696746][ T3613] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff035770390 [ 46.704706][ T3613] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 46.712677][ T3613] [ 46.716245][ T3613] Kernel Offset: disabled [ 46.720569][ T3613] Rebooting in 86400 seconds..