================================================================== BUG: KASAN: slab-out-of-bounds in __lock_acquire+0x3ba2/0x5490 kernel/locking/lockdep.c:3664 Read of size 8 at addr ffff88808d803a40 by task syz-executor.3/10793 CPU: 0 PID: 10793 Comm: syz-executor.3 Not tainted 5.1.0+ #17 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+0x4fb/0x7e0 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+0x322/0x410 net/core/sock_diag.c:263 netlink_rcv_skb+0x17a/0x460 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+0x536/0x720 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+0x12e/0x170 net/socket.c:671 ___sys_sendmsg+0x81d/0x960 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+0x103/0x680 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:00007fbb1baddc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458da9 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbb1bade6d4 R13: 00000000004c6790 R14: 00000000004db3e8 R15: 00000000ffffffff Allocated by task 10627: 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:3356 [inline] kmem_cache_alloc+0x11a/0x6f0 mm/slab.c:3518 mempool_alloc_slab+0x47/0x60 mm/mempool.c:513 mempool_alloc+0x16b/0x380 mm/mempool.c:393 bio_alloc_bioset+0x3bf/0x680 block/bio.c:476 bio_alloc include/linux/bio.h:386 [inline] io_submit_init_bio fs/ext4/page-io.c:374 [inline] io_submit_add_bh fs/ext4/page-io.c:399 [inline] ext4_bio_write_page+0xc38/0x14d1 fs/ext4/page-io.c:503 mpage_submit_page+0x15a/0x270 fs/ext4/inode.c:2237 mpage_process_page_bufs+0x517/0x610 fs/ext4/inode.c:2348 mpage_prepare_extent_to_map+0x9b2/0xf30 fs/ext4/inode.c:2706 ext4_writepages+0x1061/0x3430 fs/ext4/inode.c:2834 do_writepages+0xfc/0x2a0 mm/page-writeback.c:2341 __filemap_fdatawrite_range+0x26d/0x340 mm/filemap.c:418 file_write_and_wait_range+0x9a/0x100 mm/filemap.c:754 __generic_file_fsync+0x79/0x200 fs/libfs.c:979 ext4_sync_file+0x82e/0x1450 fs/ext4/fsync.c:120 vfs_fsync_range+0x144/0x230 fs/sync.c:197 generic_write_sync include/linux/fs.h:2808 [inline] ext4_file_write_iter+0x7b2/0x11c0 fs/ext4/file.c:270 call_write_iter include/linux/fs.h:1872 [inline] do_iter_readv_writev+0x5fd/0x900 fs/read_write.c:693 do_iter_write fs/read_write.c:970 [inline] do_iter_write+0x184/0x610 fs/read_write.c:951 vfs_iter_write+0x77/0xb0 fs/read_write.c:983 iter_file_splice_write+0x662/0xbe0 fs/splice.c:745 do_splice_from fs/splice.c:847 [inline] direct_splice_actor+0x126/0x1a0 fs/splice.c:1019 splice_direct_to_actor+0x369/0x970 fs/splice.c:974 do_splice_direct+0x1da/0x2a0 fs/splice.c:1062 do_sendfile+0x597/0xd00 fs/read_write.c:1464 __do_sys_sendfile64 fs/read_write.c:1519 [inline] __se_sys_sendfile64 fs/read_write.c:1511 [inline] __x64_sys_sendfile64+0x15a/0x220 fs/read_write.c:1511 do_syscall_64+0x103/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 7: 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] kmem_cache_free+0x86/0x260 mm/slab.c:3728 mempool_free_slab+0x1e/0x30 mm/mempool.c:520 mempool_free+0xed/0x380 mm/mempool.c:502 bio_free+0x26d/0x430 block/bio.c:254 bio_put+0xda/0x110 block/bio.c:548 ext4_end_bio+0x198/0x6a0 fs/ext4/page-io.c:343 bio_endio+0x5f8/0xad0 block/bio.c:1853 req_bio_endio block/blk-core.c:197 [inline] blk_update_request+0x317/0xba0 block/blk-core.c:1435 scsi_end_request+0x7f/0x850 drivers/scsi/scsi_lib.c:564 scsi_io_completion+0x20a/0x1420 drivers/scsi/scsi_lib.c:948 scsi_finish_command+0x3ba/0x670 drivers/scsi/scsi.c:232 scsi_softirq_done+0x33b/0x3e0 drivers/scsi/scsi_lib.c:1448 blk_done_softirq+0x304/0x4d0 block/blk-softirq.c:37 __do_softirq+0x266/0x95a kernel/softirq.c:293 The buggy address belongs to the object at ffff88808d803940 which belongs to the cache bio-0 of size 200 The buggy address is located 56 bytes to the right of 200-byte region [ffff88808d803940, ffff88808d803a08) The buggy address belongs to the page: page:ffffea00023600c0 count:1 mapcount:0 mapping:ffff8880a99e23c0 index:0x0 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea0002934bc8 ffffea0002414248 ffff8880a99e23c0 raw: 0000000000000000 ffff88808d803080 000000010000000c 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88808d803900: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff88808d803980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88808d803a00: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88808d803a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88808d803b00: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc ==================================================================