================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x910/0xa00 fs/hfsplus/unicode.c:179 Read of size 2 at addr ffff8880b4ca8218 by task syz-executor.1/14976 CPU: 1 PID: 14976 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 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_load2_noabort+0x88/0x90 mm/kasan/report.c:431 hfsplus_uni2asc+0x910/0xa00 fs/hfsplus/unicode.c:179 hfsplus_listxattr+0x5b7/0xb20 fs/hfsplus/xattr.c:737 vfs_listxattr+0x105/0x190 fs/xattr.c:392 listxattr+0xd3/0x140 fs/xattr.c:687 path_listxattr+0xae/0x140 fs/xattr.c:711 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7faf6770f0d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007faf65c81168 EFLAGS: 00000246 ORIG_RAX: 00000000000000c3 RAX: ffffffffffffffda RBX: 00007faf6782ef80 RCX: 00007faf6770f0d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 00007faf6776aae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffab6a0ebf R14: 00007faf65c81300 R15: 0000000000022000 Allocated by task 14976: __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15a/0x3c0 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] hfsplus_find_init+0x91/0x220 fs/hfsplus/bfind.c:21 hfsplus_listxattr+0x2f5/0xb20 fs/hfsplus/xattr.c:697 vfs_listxattr+0x105/0x190 fs/xattr.c:392 listxattr+0xd3/0x140 fs/xattr.c:687 path_listxattr+0xae/0x140 fs/xattr.c:711 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8856: __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] consume_skb+0x113/0x3d0 net/core/skbuff.c:714 __dev_kfree_skb_any+0x9c/0xc0 net/core/dev.c:2796 dev_consume_skb_any include/linux/netdevice.h:3567 [inline] napi_consume_skb+0x45d/0x5e0 net/core/skbuff.c:778 free_old_xmit_skbs+0xea/0x270 drivers/net/virtio_net.c:1395 start_xmit+0x156/0x17a0 drivers/net/virtio_net.c:1611 __netdev_start_xmit include/linux/netdevice.h:4349 [inline] netdev_start_xmit include/linux/netdevice.h:4363 [inline] xmit_one net/core/dev.c:3256 [inline] dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 sch_direct_xmit+0x2d6/0xf70 net/sched/sch_generic.c:332 qdisc_restart net/sched/sch_generic.c:395 [inline] __qdisc_run+0x4d0/0x1640 net/sched/sch_generic.c:403 qdisc_run include/net/pkt_sched.h:120 [inline] __dev_xmit_skb net/core/dev.c:3451 [inline] __dev_queue_xmit+0x2102/0x2e00 net/core/dev.c:3807 neigh_hh_output include/net/neighbour.h:491 [inline] neigh_output include/net/neighbour.h:499 [inline] ip_finish_output2+0xb6d/0x15a0 net/ipv4/ip_output.c:230 ip_finish_output+0xae9/0x10b0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x203/0x5f0 net/ipv4/ip_output.c:406 dst_output include/net/dst.h:455 [inline] ip_local_out+0xaf/0x170 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x91e/0x1c10 net/ipv4/ip_output.c:507 __tcp_transmit_skb+0x1b9c/0x3400 net/ipv4/tcp_output.c:1148 __tcp_send_ack.part.0+0x3d9/0x5c0 net/ipv4/tcp_output.c:3643 __tcp_send_ack net/ipv4/tcp_output.c:3649 [inline] tcp_send_ack+0x7d/0xa0 net/ipv4/tcp_output.c:3649 __tcp_ack_snd_check+0x152/0x890 net/ipv4/tcp_input.c:5213 tcp_rcv_established+0x18f9/0x1ef0 net/ipv4/tcp_input.c:5646 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 ffff8880b4ca8000 which belongs to the cache kmalloc-1024 of size 1024 The buggy address is located 536 bytes inside of 1024-byte region [ffff8880b4ca8000, ffff8880b4ca8400) The buggy address belongs to the page: page:ffffea0002d32a00 count:1 mapcount:0 mapping:ffff88813bff0ac0 index:0x0 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffffea0002924788 ffffea0002d31f88 ffff88813bff0ac0 raw: 0000000000000000 ffff8880b4ca8000 0000000100000007 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880b4ca8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880b4ca8180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880b4ca8200: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880b4ca8280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880b4ca8300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================