NEXT_ORPHAN(inode)=0 max_ino=32 i_nlink=1 EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue ================================================================== BUG: KASAN: slab-out-of-bounds in ext4_rename_dir_prepare+0x3a6/0x440 fs/ext4/namei.c:3381 Read of size 4 at addr ffff88809f252000 by task syz-executor386/8108 CPU: 1 PID: 8108 Comm: syz-executor386 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load4_noabort+0x88/0x90 mm/kasan/report.c:432 ext4_rename_dir_prepare+0x3a6/0x440 fs/ext4/namei.c:3381 ext4_cross_rename+0x112f/0x14f0 fs/ext4/namei.c:3859 ext4_rename2+0x1be/0x210 fs/ext4/namei.c:3938 vfs_rename+0x67e/0x1bc0 fs/namei.c:4479 do_renameat2+0xb59/0xc70 fs/namei.c:4629 __do_sys_renameat2 fs/namei.c:4664 [inline] __se_sys_renameat2 fs/namei.c:4661 [inline] __x64_sys_renameat2+0xba/0x150 fs/namei.c:4661 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc73145f549 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe1e5610a8 EFLAGS: 00000246 ORIG_RAX: 000000000000013c RAX: ffffffffffffffda RBX: 00007fc7314ceed0 RCX: 00007fc73145f549 RDX: 0000000000000004 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 00007ffe1e5610c8 R08: 0000000000000002 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00007ffe1e5610f0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 7919: __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 __napi_alloc_skb+0x74/0x300 net/core/skbuff.c:478 napi_alloc_skb include/linux/skbuff.h:2724 [inline] page_to_skb+0x76/0xa70 drivers/net/virtio_net.c:396 receive_mergeable drivers/net/virtio_net.c:951 [inline] receive_buf+0x2ab4/0x6780 drivers/net/virtio_net.c:1061 virtnet_receive drivers/net/virtio_net.c:1352 [inline] virtnet_poll+0x568/0xe00 drivers/net/virtio_net.c:1457 napi_poll net/core/dev.c:6280 [inline] net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346 __do_softirq+0x265/0x980 kernel/softirq.c:292 Freed by task 7919: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 skb_free_head net/core/skbuff.c:563 [inline] skb_release_data+0x6de/0x920 net/core/skbuff.c:583 skb_release_all net/core/skbuff.c:640 [inline] __kfree_skb net/core/skbuff.c:654 [inline] kfree_skb_partial+0x7e/0xa0 net/core/skbuff.c:4857 tcp_rcv_established+0x1b89/0x1ef0 net/ipv4/tcp_input.c:5649 tcp_v4_do_rcv+0x5d6/0x870 net/ipv4/tcp_ipv4.c:1547 tcp_v4_rcv+0x2c03/0x3b80 net/ipv4/tcp_ipv4.c:1832 ip_local_deliver_finish+0x495/0xc00 net/ipv4/ip_input.c:215 NF_HOOK include/linux/netfilter.h:289 [inline] ip_local_deliver+0x188/0x500 net/ipv4/ip_input.c:256 dst_input include/net/dst.h:461 [inline] ip_rcv_finish+0x1ca/0x2e0 net/ipv4/ip_input.c:414 NF_HOOK include/linux/netfilter.h:289 [inline] ip_rcv+0xca/0x3c0 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4954 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066 netif_receive_skb_internal+0xf0/0x3f0 net/core/dev.c:5156 napi_skb_finish net/core/dev.c:5601 [inline] napi_gro_receive+0x2e6/0x450 net/core/dev.c:5632 receive_buf+0xc2c/0x6780 drivers/net/virtio_net.c:1088 virtnet_receive drivers/net/virtio_net.c:1352 [inline] virtnet_poll+0x568/0xe00 drivers/net/virtio_net.c:1457 napi_poll net/core/dev.c:6280 [inline] net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346 __do_softirq+0x265/0x980 kernel/softirq.c:292 The buggy address belongs to the object at ffff88809f252040 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 64 bytes to the left of 512-byte region [ffff88809f252040, ffff88809f252240) The buggy address belongs to the page: page:ffffea00027c9480 count:1 mapcount:0 mapping:ffff88813bff0940 index:0xffff88809f2527c0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea0002a32788 ffffea0002a326c8 ffff88813bff0940 raw: ffff88809f2527c0 ffff88809f252040 0000000100000005 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809f251f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88809f251f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88809f252000: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ^ ffff88809f252080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88809f252100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================