Hello, The following program leads to a leak of struct lapb_cb:
// autogenerated by syzkaller (http://github.com/google/syzkaller) #include <unistd.h> #include <sys/syscall.h> #include <string.h> #include <stdint.h> int main() { syscall(SYS_mmap, 0x20000000ul, 0x10000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); int fd = syscall(SYS_open, "/dev/ptmx", 0x103002ul, 0x0ul, 0, 0, 0); *(uint32_t*)0x20001000 = (uint32_t)0x6; syscall(SYS_ioctl, fd, 0x5423ul, 0x20001000ul, 0, 0, 0); *(uint32_t*)0x20006ff8 = (uint32_t)0x1; *(uint8_t*)0x20006ffc = (uint8_t)0x29c; *(uint8_t*)0x20006ffd = (uint8_t)0x3; *(uint8_t*)0x20006ffe = (uint8_t)0x4; *(uint8_t*)0x20006fff = (uint8_t)0x8; *(uint8_t*)0x20007000 = (uint8_t)0x3; *(uint8_t*)0x20007001 = (uint8_t)0x1; syscall(SYS_ioctl, fd, 0x400442c9ul, 0x20006ff8ul, 0, 0, 0); *(uint8_t*)0x20006f64 = (uint8_t)0xe7; *(uint8_t*)0x20006f65 = (uint8_t)0xfb49; *(uint16_t*)0x20006f66 = (uint16_t)0x3; syscall(SYS_ioctl, fd, 0x4b46ul, 0x20006f64ul, 0, 0, 0); *(uint16_t*)0x20003000 = (uint16_t)0x8; *(uint16_t*)0x20003002 = (uint16_t)0x5; *(uint16_t*)0x20003004 = (uint16_t)0x8; *(uint16_t*)0x20003006 = (uint16_t)0x3; *(uint8_t*)0x20003008 = (uint8_t)0x6; *(uint8_t*)0x20003009 = (uint8_t)0x4b8; *(uint8_t*)0x2000300a = (uint8_t)0x2; *(uint8_t*)0x2000300b = (uint8_t)0x1; *(uint32_t*)0x2000300c = (uint32_t)0x5; *(uint8_t*)0x20003010 = (uint8_t)0x802; syscall(SYS_ioctl, fd, 0x5404ul, 0x20003000ul, 0, 0, 0); return 0; } unreferenced object 0xffff8800633575d0 (size 512): comm "softirq", pid 0, jiffies 4299764624 (age 16.395s) hex dump (first 32 bytes): 00 01 00 00 00 00 ad de 00 02 00 00 00 00 ad de ................ c0 a3 d4 34 00 88 ff ff 00 00 00 00 00 00 00 00 ...4............ backtrace: [<ffffffff85c73a22>] kmemleak_alloc+0x72/0xc0 mm/kmemleak.c:915 [< inline >] kmemleak_alloc_recursive include/linux/kmemleak.h:47 [< inline >] slab_post_alloc_hook mm/slub.c:1335 [< inline >] slab_alloc_node mm/slub.c:2594 [< inline >] slab_alloc mm/slub.c:2602 [<ffffffff816cc6f8>] kmem_cache_alloc_trace+0x138/0x2f0 mm/slub.c:2619 [< inline >] kzalloc include/linux/slab.h:458 [< inline >] lapb_create_cb net/lapb/lapb_iface.c:121 [<ffffffff852ec5ea>] lapb_register+0xfa/0x590 net/lapb/lapb_iface.c:158 [< inline >] x25_asy_open drivers/net/wan/x25_asy.c:485 [<ffffffff83a69351>] x25_asy_open_tty+0x431/0x740 drivers/net/wan/x25_asy.c:573 [<ffffffff82bacd58>] tty_ldisc_open.isra.2+0x78/0xd0 drivers/tty/tty_ldisc.c:447 [<ffffffff82bad41a>] tty_set_ldisc+0x1ca/0xa30 drivers/tty/tty_ldisc.c:567 [< inline >] tiocsetd drivers/tty/tty_io.c:2650 [<ffffffff82b9481a>] tty_ioctl+0xb2a/0x2160 drivers/tty/tty_io.c:2883 [< inline >] vfs_ioctl fs/ioctl.c:43 [<ffffffff81750d41>] do_vfs_ioctl+0x681/0xe40 fs/ioctl.c:607 [< inline >] SYSC_ioctl fs/ioctl.c:622 [<ffffffff8175158f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613 [<ffffffff85c8eaf6>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185 [<ffffffffffffffff>] 0xffffffffffffffff On commit 8513342170278468bac126640a5d2d12ffbff106 (Dec 28). -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
