================================================================== BUG: KASAN: slab-out-of-bounds in __lock_acquire+0x3ba2/0x5490 kernel/locking/lockdep.c:3664 Read of size 8 at addr ffff8880a9122ac0 by task syz-executor.4/17730 CPU: 0 PID: 17730 Comm: syz-executor.4 Not tainted 5.1.0+ #19 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:660 [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: 0033:0x458da9 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb1bfd89c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458da9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb1bfd8a6d4 R13: 00000000004c6790 R14: 00000000004db3e8 R15: 00000000ffffffff Allocated by task 9215: 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_kmalloc+0x9/0x10 mm/kasan/common.c:503 kmem_cache_alloc_trace+0x151/0x750 mm/slab.c:3585 kmalloc include/linux/slab.h:547 [inline] kzalloc include/linux/slab.h:742 [inline] uevent_show+0x165/0x370 drivers/base/core.c:1222 dev_attr_show+0x50/0xa0 drivers/base/core.c:931 sysfs_kf_seq_show+0x1fc/0x410 fs/sysfs/file.c:60 kernfs_seq_show+0x14f/0x1b0 fs/kernfs/file.c:168 seq_read+0x4ca/0x1110 fs/seq_file.c:229 kernfs_fop_read+0xed/0x560 fs/kernfs/file.c:252 __vfs_read+0x8a/0x110 fs/read_write.c:425 vfs_read+0x194/0x3e0 fs/read_write.c:461 ksys_read+0x14f/0x290 fs/read_write.c:587 __do_sys_read fs/read_write.c:597 [inline] __se_sys_read fs/read_write.c:595 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:595 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 9215: 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:3462 [inline] kfree+0xcf/0x220 mm/slab.c:3785 uevent_show+0x2ca/0x370 drivers/base/core.c:1235 dev_attr_show+0x50/0xa0 drivers/base/core.c:931 sysfs_kf_seq_show+0x1fc/0x410 fs/sysfs/file.c:60 kernfs_seq_show+0x14f/0x1b0 fs/kernfs/file.c:168 seq_read+0x4ca/0x1110 fs/seq_file.c:229 kernfs_fop_read+0xed/0x560 fs/kernfs/file.c:252 __vfs_read+0x8a/0x110 fs/read_write.c:425 vfs_read+0x194/0x3e0 fs/read_write.c:461 ksys_read+0x14f/0x290 fs/read_write.c:587 __do_sys_read fs/read_write.c:597 [inline] __se_sys_read fs/read_write.c:595 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:595 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 ffff8880a9122e80 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 960 bytes to the left of 4096-byte region [ffff8880a9122e80, ffff8880a9123e80) The buggy address belongs to the page: page:ffffea0002a44880 count:1 mapcount:0 mapping:ffff8880aa400dc0 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea0002217b88 ffffea00023a6f88 ffff8880aa400dc0 raw: 0000000000000000 ffff8880a9122e80 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a9122980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a9122a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880a9122a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880a9122b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a9122b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================