================================================================== BUG: KASAN: slab-out-of-bounds in __lock_acquire+0x3ba2/0x5490 kernel/locking/lockdep.c:3664 Read of size 8 at addr ffff888093009740 by task syz-executor.4/2104 CPU: 0 PID: 2104 Comm: syz-executor.4 Not tainted 5.2.0-rc1+ #1 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+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:188 __kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 kasan_report+0x12/0x20 mm/kasan/common.c:614 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132 __lock_acquire+0x3ba2/0x5490 kernel/locking/lockdep.c:3664 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:4302 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] rhashtable_walk_enter+0xf9/0x390 lib/rhashtable.c:669 __tipc_dump_start+0x1fa/0x3c0 net/tipc/socket.c:3414 tipc_dump_start+0x70/0x90 net/tipc/socket.c:3396 __netlink_dump_start+0x4f8/0x7d0 net/netlink/af_netlink.c:2351 netlink_dump_start include/linux/netlink.h:226 [inline] tipc_sock_diag_handler_dump+0x1d9/0x270 net/tipc/diag.c:91 __sock_diag_cmd net/core/sock_diag.c:232 [inline] sock_diag_rcv_msg+0x319/0x410 net/core/sock_diag.c:263 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2486 sock_diag_rcv+0x2b/0x40 net/core/sock_diag.c:274 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1337 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1926 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:671 ___sys_sendmsg+0x803/0x920 net/socket.c:2292 __sys_sendmsg+0x105/0x1d0 net/socket.c:2330 __do_sys_sendmsg net/socket.c:2339 [inline] __se_sys_sendmsg net/socket.c:2337 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2337 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459279 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc2ad8d2c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459279 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 000000000075bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc2ad8d36d4 R13: 00000000004c6cdf R14: 00000000004dbb08 R15: 00000000ffffffff Allocated by task 28913: save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_kmalloc mm/kasan/common.c:489 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:497 slab_post_alloc_hook mm/slab.h:437 [inline] slab_alloc mm/slab.c:3326 [inline] kmem_cache_alloc+0x11a/0x6f0 mm/slab.c:3488 vm_area_dup+0x21/0x170 kernel/fork.c:342 dup_mmap kernel/fork.c:527 [inline] dup_mm+0x8c4/0x13b0 kernel/fork.c:1340 copy_mm kernel/fork.c:1396 [inline] copy_process.part.0+0x2cde/0x6790 kernel/fork.c:2031 copy_process kernel/fork.c:1799 [inline] _do_fork+0x25d/0xfe0 kernel/fork.c:2368 __do_sys_clone kernel/fork.c:2475 [inline] __se_sys_clone kernel/fork.c:2469 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2469 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 1545: save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:451 kasan_slab_free+0xe/0x10 mm/kasan/common.c:459 __cache_free mm/slab.c:3432 [inline] kmem_cache_free+0x86/0x260 mm/slab.c:3698 vm_area_free+0x1d/0x30 kernel/fork.c:353 remove_vma+0x13f/0x180 mm/mmap.c:186 exit_mmap+0x354/0x510 mm/mmap.c:3155 __mmput kernel/fork.c:1058 [inline] mmput+0x15f/0x4c0 kernel/fork.c:1079 exec_mmap fs/exec.c:1046 [inline] flush_old_exec+0x8c8/0x1c00 fs/exec.c:1279 load_elf_binary+0xa53/0x56c0 fs/binfmt_elf.c:866 search_binary_handler fs/exec.c:1657 [inline] search_binary_handler+0x16d/0x570 fs/exec.c:1634 exec_binprm fs/exec.c:1700 [inline] __do_execve_file.isra.0+0x1310/0x22f0 fs/exec.c:1820 do_execveat_common fs/exec.c:1867 [inline] do_execve fs/exec.c:1884 [inline] __do_sys_execve fs/exec.c:1960 [inline] __se_sys_execve fs/exec.c:1955 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1955 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff888093009670 which belongs to the cache vm_area_struct of size 200 The buggy address is located 8 bytes to the right of 200-byte region [ffff888093009670, ffff888093009738) The buggy address belongs to the page: page:ffffea00024c0240 refcount:1 mapcount:0 mapping:ffff8880aa587300 index:0xffff888093009040 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea0002385688 ffffea00023a70c8 ffff8880aa587300 raw: ffff888093009040 ffff888093009040 000000010000000e 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888093009600: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fb fb ffff888093009680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888093009700: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fb ^ ffff888093009780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888093009800: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================