./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1715413588 <...> Warning: Permanently added '10.128.0.201' (ECDSA) to the list of known hosts. execve("./syz-executor1715413588", ["./syz-executor1715413588"], 0x7fff8ba640a0 /* 10 vars */) = 0 brk(NULL) = 0x555555b9b000 brk(0x555555b9bc40) = 0x555555b9bc40 arch_prctl(ARCH_SET_FS, 0x555555b9b300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 set_tid_address(0x555555b9b5d0) = 3612 set_robust_list(0x555555b9b5e0, 24) = 0 rt_sigaction(SIGRTMIN, {sa_handler=0x7f4221e9d730, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7f4221e9de00}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f4221e9d7d0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f4221e9de00}, 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-executor1715413588", 4096) = 28 brk(0x555555bbcc40) = 0x555555bbcc40 brk(0x555555bbd000) = 0x555555bbd000 mprotect(0x7f4221f5e000, 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, child_tidptr=0x555555b9b5d0) = 3613 ./strace-static-x86_64: Process 3613 attached [pid 3613] set_robust_list(0x555555b9b5e0, 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) = 0x7f422168d000 [pid 3613] mprotect(0x7f422168e000, 8388608, PROT_READ|PROT_WRITE) = 0 [pid 3613] clone(child_stack=0x7f4221e8d3f0, 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=0x7f4221e8d700, child_tidptr=0x7f4221e8d9d0) = 2 [pid 3613] ioctl(3, HCIDEVUP./strace-static-x86_64: Process 3617 attached [pid 3617] set_robust_list(0x7f4221e8d9e0, 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: [ 40.184814][ T3615] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 40.193037][ T3615] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 40.201552][ T3615] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 40.212485][ T3615] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 40.221649][ T3615] 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>, 0x7ffc330aa9b4) = 0 [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(0x7f422168d000, 8372224, MADV_DONTNEED [pid 3613] <... writev resumed>) = 13 [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) = 14 [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] futex(0x7f4221e8d9d0, FUTEX_WAIT, 2, NULL [pid 3617] <... madvise resumed>) = 0 [pid 3617] exit(0) = ? [pid 3617] +++ exited with 0 +++ [pid 3613] <... futex resumed>) = 0 [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, "\x02\xc8\x00\x0c\x00\x08\x00\x03\x00\x0f\x00\x00\x00\x00\x00\x00\x00", 17) = 17 [pid 3613] write(202, "\x04\x10\x01\xff", 4) = 4 [pid 3613] exit_group(1) = ? [ 40.287752][ T3615] Bluetooth: hci0: hardware error 0xff [ 40.297981][ T3615] [ 40.300309][ T3615] ========================= [ 40.304806][ T3615] WARNING: held lock freed! [ 40.309340][ T3615] 6.0.0-rc6-syzkaller-00281-g1707c39ae309 #0 Not tainted [ 40.316333][ T3615] ------------------------- [ 40.320804][ T3615] kworker/u5:2/3615 is freeing memory ffff88801783c000-ffff88801783c7ff, with a lock still held there! [ 40.331824][ T3615] ffff88801783c520 (&chan->lock/1){+.+.}-{3:3}, at: l2cap_conn_del+0x3b5/0x7b0 [ 40.340785][ T3615] 7 locks held by kworker/u5:2/3615: [ 40.346041][ T3615] #0: ffff88814b1ae938 ((wq_completion)hci0){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 [ 40.356196][ T3615] #1: ffffc9000394fda8 ((work_completion)(&hdev->error_reset)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 [ 40.367911][ T3615] #2: ffff88814b130fd0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x25/0x70 [ 40.377456][ T3615] #3: ffff88814b130078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x268/0x1130 [ 40.387086][ T3615] #4: ffffffff8d9d3e28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xd5/0x260 [ 40.397168][ T3615] #5: ffff88807281e2d8 (&conn->chan_lock){+.+.}-{3:3}, at: l2cap_conn_del+0x2ef/0x7b0 [ 40.406818][ T3615] #6: ffff88801783c520 (&chan->lock/1){+.+.}-{3:3}, at: l2cap_conn_del+0x3b5/0x7b0 [ 40.416189][ T3615] [ 40.416189][ T3615] stack backtrace: [ 40.422054][ T3615] CPU: 1 PID: 3615 Comm: kworker/u5:2 Not tainted 6.0.0-rc6-syzkaller-00281-g1707c39ae309 #0 [ 40.432178][ T3615] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 [ 40.442230][ T3615] Workqueue: hci0 hci_error_reset [ 40.447235][ T3615] Call Trace: [ 40.450494][ T3615] [ 40.453405][ T3615] dump_stack_lvl+0xcd/0x134 [ 40.457978][ T3615] debug_check_no_locks_freed.cold+0x9d/0xa9 [ 40.463938][ T3615] slab_free_freelist_hook+0x73/0x1c0 [ 40.469286][ T3615] ? l2cap_chan_put+0x22a/0x2d0 [ 40.474114][ T3615] kfree+0xe2/0x580 [ 40.477895][ T3615] ? skb_dequeue+0x125/0x180 [ 40.482466][ T3615] l2cap_chan_put+0x22a/0x2d0 [ 40.487118][ T3615] l2cap_conn_del+0x3fc/0x7b0 [ 40.491775][ T3615] ? l2cap_conn_del+0x7b0/0x7b0 [ 40.496602][ T3615] l2cap_disconn_cfm+0x8c/0xc0 [ 40.501348][ T3615] hci_conn_hash_flush+0x122/0x260 [ 40.506435][ T3615] hci_dev_close_sync+0x55d/0x1130 [ 40.511527][ T3615] ? hci_dev_open_sync+0x2190/0x2190 [ 40.516786][ T3615] ? lock_downgrade+0x6e0/0x6e0 [ 40.521618][ T3615] ? move_linked_works+0x1ec/0x2f0 [ 40.526707][ T3615] hci_dev_do_close+0x2d/0x70 [ 40.531365][ T3615] hci_error_reset+0x96/0x130 [ 40.536017][ T3615] process_one_work+0x991/0x1610 [ 40.540935][ T3615] ? pwq_dec_nr_in_flight+0x2a0/0x2a0 [ 40.546288][ T3615] ? rwlock_bug.part.0+0x90/0x90 [ 40.551200][ T3615] ? _raw_spin_lock_irq+0x41/0x50 [ 40.556203][ T3615] worker_thread+0x665/0x1080 [ 40.560858][ T3615] ? __kthread_parkme+0x15f/0x220 [ 40.565862][ T3615] ? process_one_work+0x1610/0x1610 [ 40.571040][ T3615] kthread+0x2e4/0x3a0 [ 40.575090][ T3615] ? kthread_complete_and_exit+0x40/0x40 [ 40.580701][ T3615] ret_from_fork+0x1f/0x30 [ 40.585099][ T3615] [ 40.588365][ T3615] ================================================================== [ 40.596426][ T3615] BUG: KASAN: use-after-free in __mutex_unlock_slowpath+0xa6/0x5e0 [ 40.604309][ T3615] Read of size 8 at addr ffff88801783c4b8 by task kworker/u5:2/3615 [ 40.612266][ T3615] [ 40.614579][ T3615] CPU: 1 PID: 3615 Comm: kworker/u5:2 Not tainted 6.0.0-rc6-syzkaller-00281-g1707c39ae309 #0 [ 40.624715][ T3615] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 [ 40.634753][ T3615] Workqueue: hci0 hci_error_reset [ 40.639770][ T3615] Call Trace: [ 40.643032][ T3615] [ 40.645951][ T3615] dump_stack_lvl+0xcd/0x134 [ 40.650531][ T3615] print_report.cold+0x2ba/0x719 [ 40.655460][ T3615] ? __mutex_unlock_slowpath+0xa6/0x5e0 [ 40.660994][ T3615] kasan_report+0xb1/0x1e0 [ 40.665490][ T3615] ? __mutex_unlock_slowpath+0xa6/0x5e0 [ 40.671027][ T3615] kasan_check_range+0x13d/0x180 [ 40.675956][ T3615] __mutex_unlock_slowpath+0xa6/0x5e0 [ 40.681353][ T3615] ? slab_free_freelist_hook+0x8b/0x1c0 [ 40.686883][ T3615] ? wait_for_completion_io_timeout+0x20/0x20 [ 40.692947][ T3615] ? l2cap_chan_put+0x22a/0x2d0 [ 40.697782][ T3615] ? kfree+0xe2/0x580 [ 40.701752][ T3615] ? skb_dequeue+0x125/0x180 [ 40.706332][ T3615] l2cap_conn_del+0x404/0x7b0 [ 40.710998][ T3615] ? l2cap_conn_del+0x7b0/0x7b0 [ 40.715840][ T3615] l2cap_disconn_cfm+0x8c/0xc0 [ 40.720599][ T3615] hci_conn_hash_flush+0x122/0x260 [ 40.725704][ T3615] hci_dev_close_sync+0x55d/0x1130 [ 40.730807][ T3615] ? hci_dev_open_sync+0x2190/0x2190 [ 40.736082][ T3615] ? lock_downgrade+0x6e0/0x6e0 [ 40.740927][ T3615] ? move_linked_works+0x1ec/0x2f0 [ 40.746027][ T3615] hci_dev_do_close+0x2d/0x70 [ 40.750694][ T3615] hci_error_reset+0x96/0x130 [ 40.755361][ T3615] process_one_work+0x991/0x1610 [ 40.760288][ T3615] ? pwq_dec_nr_in_flight+0x2a0/0x2a0 [ 40.765651][ T3615] ? rwlock_bug.part.0+0x90/0x90 [ 40.770576][ T3615] ? _raw_spin_lock_irq+0x41/0x50 [ 40.775590][ T3615] worker_thread+0x665/0x1080 [ 40.780265][ T3615] ? __kthread_parkme+0x15f/0x220 [ 40.785286][ T3615] ? process_one_work+0x1610/0x1610 [ 40.790652][ T3615] kthread+0x2e4/0x3a0 [ 40.794710][ T3615] ? kthread_complete_and_exit+0x40/0x40 [ 40.800337][ T3615] ret_from_fork+0x1f/0x30 [ 40.804747][ T3615] [ 40.807750][ T3615] [ 40.810056][ T3615] Allocated by task 3615: [ 40.814361][ T3615] kasan_save_stack+0x1e/0x40 [ 40.819027][ T3615] __kasan_kmalloc+0xa9/0xd0 [ 40.823603][ T3615] l2cap_chan_create+0x40/0x570 [ 40.828530][ T3615] amp_mgr_create+0x8f/0x960 [ 40.833104][ T3615] a2mp_channel_create+0x7d/0x150 [ 40.838201][ T3615] l2cap_recv_frame+0x48e3/0x8d90 [ 40.843214][ T3615] l2cap_recv_acldata+0xaa6/0xc00 [ 40.848229][ T3615] hci_rx_work+0x705/0x1230 [ 40.852720][ T3615] process_one_work+0x991/0x1610 [ 40.857655][ T3615] worker_thread+0x665/0x1080 [ 40.862319][ T3615] kthread+0x2e4/0x3a0 [ 40.866373][ T3615] ret_from_fork+0x1f/0x30 [ 40.870776][ T3615] [ 40.873082][ T3615] Freed by task 3615: [ 40.877041][ T3615] kasan_save_stack+0x1e/0x40 [ 40.881709][ T3615] kasan_set_track+0x21/0x30 [ 40.886287][ T3615] kasan_set_free_info+0x20/0x30 [ 40.891212][ T3615] ____kasan_slab_free+0x166/0x1c0 [ 40.896311][ T3615] slab_free_freelist_hook+0x8b/0x1c0 [ 40.901667][ T3615] kfree+0xe2/0x580 [ 40.905457][ T3615] l2cap_chan_put+0x22a/0x2d0 [ 40.910120][ T3615] l2cap_conn_del+0x3fc/0x7b0 [ 40.914795][ T3615] l2cap_disconn_cfm+0x8c/0xc0 [ 40.919544][ T3615] hci_conn_hash_flush+0x122/0x260 [ 40.924640][ T3615] hci_dev_close_sync+0x55d/0x1130 [ 40.929739][ T3615] hci_dev_do_close+0x2d/0x70 [ 40.934405][ T3615] hci_error_reset+0x96/0x130 [ 40.939417][ T3615] process_one_work+0x991/0x1610 [ 40.944345][ T3615] worker_thread+0x665/0x1080 [ 40.949008][ T3615] kthread+0x2e4/0x3a0 [ 40.953238][ T3615] ret_from_fork+0x1f/0x30 [ 40.957745][ T3615] [ 40.960053][ T3615] The buggy address belongs to the object at ffff88801783c000 [ 40.960053][ T3615] which belongs to the cache kmalloc-2k of size 2048 [ 40.974096][ T3615] The buggy address is located 1208 bytes inside of [ 40.974096][ T3615] 2048-byte region [ffff88801783c000, ffff88801783c800) [ 40.987621][ T3615] [ 40.989929][ T3615] The buggy address belongs to the physical page: [ 40.996318][ T3615] page:ffffea00005e0e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17838 [ 41.006455][ T3615] head:ffffea00005e0e00 order:3 compound_mapcount:0 compound_pincount:0 [ 41.014761][ T3615] flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) [ 41.022818][ T3615] raw: 00fff00000010200 ffffea00005e3600 dead000000000002 ffff888011842000 [ 41.031387][ T3615] raw: 0000000000000000 0000000080080008 00000001ffffffff 0000000000000000 [ 41.040055][ T3615] page dumped because: kasan: bad access detected [ 41.046536][ T3615] page_owner tracks the page as allocated [ 41.052232][ T3615] page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 1569597260, free_ts 0 [ 41.071839][ T3615] get_page_from_freelist+0x109b/0x2ce0 [ 41.077379][ T3615] __alloc_pages+0x1c7/0x510 [ 41.081958][ T3615] alloc_page_interleave+0x1e/0x200 [ 41.087146][ T3615] alloc_pages+0x22f/0x270 [ 41.091548][ T3615] allocate_slab+0x27e/0x3d0 [ 41.096122][ T3615] ___slab_alloc+0x7f1/0xe10 [ 41.100695][ T3615] __slab_alloc.constprop.0+0x4d/0xa0 [ 41.106075][ T3615] kmem_cache_alloc_trace+0x323/0x3e0 [ 41.111434][ T3615] device_create_groups_vargs+0x8a/0x280 [ 41.117074][ T3615] device_create+0xdf/0x120 [ 41.121563][ T3615] fb_console_init+0x56/0x276 [ 41.126229][ T3615] fbmem_init+0x105/0x126 [ 41.130549][ T3615] do_one_initcall+0xfe/0x650 [ 41.135215][ T3615] kernel_init_freeable+0x6b1/0x73a [ 41.140662][ T3615] kernel_init+0x1a/0x1d0 [ 41.144979][ T3615] ret_from_fork+0x1f/0x30 [ 41.149381][ T3615] page_owner free stack trace missing [ 41.154730][ T3615] [ 41.157040][ T3615] Memory state around the buggy address: [ 41.162648][ T3615] ffff88801783c380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.170779][ T3615] ffff88801783c400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.178823][ T3615] >ffff88801783c480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.186863][ T3615] ^ [ 41.192819][ T3615] ffff88801783c500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.200866][ T3615] ffff88801783c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.209081][ T3615] ================================================================== [ 41.217343][ T3615] Kernel panic - not syncing: panic_on_warn set ... [ 41.223928][ T3615] CPU: 1 PID: 3615 Comm: kworker/u5:2 Not tainted 6.0.0-rc6-syzkaller-00281-g1707c39ae309 #0 [ 41.234088][ T3615] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 [ 41.244133][ T3615] Workqueue: hci0 hci_error_reset [ 41.249151][ T3615] Call Trace: [ 41.252418][ T3615] [ 41.255336][ T3615] dump_stack_lvl+0xcd/0x134 [ 41.259923][ T3615] panic+0x2c8/0x627 [ 41.263808][ T3615] ? panic_print_sys_info.part.0+0x10b/0x10b [ 41.269779][ T3615] ? preempt_schedule_common+0x59/0xc0 [ 41.275227][ T3615] ? preempt_schedule_thunk+0x16/0x18 [ 41.280593][ T3615] ? __mutex_unlock_slowpath+0xa6/0x5e0 [ 41.286131][ T3615] end_report.part.0+0x3f/0x7c [ 41.290883][ T3615] kasan_report.cold+0xa/0xf [ 41.295465][ T3615] ? __mutex_unlock_slowpath+0xa6/0x5e0 [ 41.301001][ T3615] kasan_check_range+0x13d/0x180 [ 41.305931][ T3615] __mutex_unlock_slowpath+0xa6/0x5e0 [ 41.311294][ T3615] ? slab_free_freelist_hook+0x8b/0x1c0 [ 41.316826][ T3615] ? wait_for_completion_io_timeout+0x20/0x20 [ 41.322884][ T3615] ? l2cap_chan_put+0x22a/0x2d0 [ 41.327721][ T3615] ? kfree+0xe2/0x580 [ 41.331688][ T3615] ? skb_dequeue+0x125/0x180 [ 41.336266][ T3615] l2cap_conn_del+0x404/0x7b0 [ 41.340935][ T3615] ? l2cap_conn_del+0x7b0/0x7b0 [ 41.345771][ T3615] l2cap_disconn_cfm+0x8c/0xc0 [ 41.350521][ T3615] hci_conn_hash_flush+0x122/0x260 [ 41.355626][ T3615] hci_dev_close_sync+0x55d/0x1130 [ 41.360730][ T3615] ? hci_dev_open_sync+0x2190/0x2190 [ 41.366005][ T3615] ? lock_downgrade+0x6e0/0x6e0 [ 41.370843][ T3615] ? move_linked_works+0x1ec/0x2f0 [ 41.375944][ T3615] hci_dev_do_close+0x2d/0x70 [ 41.380608][ T3615] hci_error_reset+0x96/0x130 [ 41.385276][ T3615] process_one_work+0x991/0x1610 [ 41.390207][ T3615] ? pwq_dec_nr_in_flight+0x2a0/0x2a0 [ 41.395567][ T3615] ? rwlock_bug.part.0+0x90/0x90 [ 41.400490][ T3615] ? _raw_spin_lock_irq+0x41/0x50 [ 41.405504][ T3615] worker_thread+0x665/0x1080 [ 41.410171][ T3615] ? __kthread_parkme+0x15f/0x220 [ 41.415181][ T3615] ? process_one_work+0x1610/0x1610 [ 41.420395][ T3615] kthread+0x2e4/0x3a0 [ 41.424449][ T3615] ? kthread_complete_and_exit+0x40/0x40 [ 41.430070][ T3615] ret_from_fork+0x1f/0x30 [ 41.434479][ T3615] [ 41.438185][ T3615] Kernel Offset: disabled [ 41.442494][ T3615] Rebooting in 86400 seconds..