EXT4-fs (loop3): mounted filesystem without journal. Quota mode: none. EXT4-fs error (device loop3): ext4_xattr_ibody_get:619: inode #18: comm syz-executor.3: corrupted in-inode xattr ================================================================== BUG: KASAN: use-after-free in get_max_inline_xattr_value_size+0x36e/0x510 fs/ext4/inline.c:62 Read of size 4 at addr ffff888128ec6004 by task syz-executor.3/709 CPU: 0 PID: 709 Comm: syz-executor.3 Not tainted 6.1.25-syzkaller-00028-gf6707f352b54 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 mm/kasan/report.c:531 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:350 get_max_inline_xattr_value_size+0x36e/0x510 fs/ext4/inline.c:62 ext4_get_max_inline_size+0x13d/0x1f0 fs/ext4/inline.c:113 ext4_try_to_write_inline_data+0xd3/0x1420 fs/ext4/inline.c:663 ext4_write_begin+0x200/0xfb0 fs/ext4/inode.c:1179 ext4_da_write_begin+0x2ff/0x920 fs/ext4/inode.c:2987 generic_perform_write+0x2f9/0x5c0 mm/filemap.c:3765 ext4_buffered_write_iter+0x360/0x640 fs/ext4/file.c:285 ext4_file_write_iter+0x194/0x1cf0 call_write_iter include/linux/fs.h:2215 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8d1/0xe80 fs/read_write.c:584 ksys_write+0x199/0x2c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f976067cb29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f97613050c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f976079bf80 RCX: 00007f976067cb29 RDX: 0000000000000001 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007f97606c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f976079bf80 R15: 00007ffefeab46d8 Allocated by task 291: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:333 kasan_slab_alloc include/linux/kasan.h:202 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:768 slab_alloc_node mm/slub.c:3418 [inline] kmem_cache_alloc_node+0x18a/0x2d0 mm/slub.c:3463 __alloc_skb+0xcc/0x2c0 net/core/skbuff.c:497 alloc_skb include/linux/skbuff.h:1275 [inline] __tcp_send_ack+0x95/0x6c0 net/ipv4/tcp_output.c:3960 tcp_send_ack+0x3b/0x60 net/ipv4/tcp_output.c:3992 __tcp_cleanup_rbuf+0x1ee/0x480 net/ipv4/tcp.c:1618 tcp_cleanup_rbuf net/ipv4/tcp.c:1629 [inline] tcp_recvmsg_locked+0x1c07/0x24c0 net/ipv4/tcp.c:2641 tcp_recvmsg+0x258/0x920 net/ipv4/tcp.c:2671 inet_recvmsg+0x14e/0x500 net/ipv4/af_inet.c:864 sock_recvmsg_nosec net/socket.c:1000 [inline] sock_recvmsg net/socket.c:1018 [inline] sock_read_iter+0x3b2/0x4b0 net/socket.c:1091 call_read_iter include/linux/fs.h:2209 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x771/0xad0 fs/read_write.c:470 ksys_read+0x199/0x2c0 fs/read_write.c:613 __do_sys_read fs/read_write.c:623 [inline] __se_sys_read fs/read_write.c:621 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:621 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 291: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249 kasan_slab_free include/linux/kasan.h:178 [inline] slab_free_hook mm/slub.c:1744 [inline] slab_free_freelist_hook mm/slub.c:1770 [inline] slab_free mm/slub.c:3681 [inline] kmem_cache_free+0x291/0x510 mm/slub.c:3703 kfree_skbmem+0x104/0x170 __kfree_skb net/core/skbuff.c:869 [inline] kfree_skb_partial+0x76/0x90 net/core/skbuff.c:5389 tcp_data_queue+0x1f08/0x6db0 net/ipv4/tcp_input.c:5077 tcp_rcv_established+0xa09/0x1c60 net/ipv4/tcp_input.c:6005 tcp_v4_do_rcv+0x430/0xa20 net/ipv4/tcp_ipv4.c:1670 tcp_v4_rcv+0x20d7/0x2a30 net/ipv4/tcp_ipv4.c:2091 ip_protocol_deliver_rcu+0x32f/0x720 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x24b/0x430 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:305 [inline] ip_local_deliver+0x1b3/0x3b0 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:454 [inline] ip_sublist_rcv_finish net/ipv4/ip_input.c:580 [inline] ip_list_rcv_finish net/ipv4/ip_input.c:630 [inline] ip_sublist_rcv+0x782/0x920 net/ipv4/ip_input.c:638 ip_list_rcv+0x422/0x470 net/ipv4/ip_input.c:673 __netif_receive_skb_list_ptype net/core/dev.c:5542 [inline] __netif_receive_skb_list_core+0x6b1/0x890 net/core/dev.c:5590 __netif_receive_skb_list net/core/dev.c:5642 [inline] netif_receive_skb_list_internal+0x967/0xcc0 net/core/dev.c:5733 gro_normal_list include/net/gro.h:433 [inline] napi_complete_done+0x344/0x770 net/core/dev.c:6074 virtqueue_napi_complete drivers/net/virtio_net.c:401 [inline] virtnet_poll+0xc33/0x12c0 drivers/net/virtio_net.c:1685 __napi_poll+0xbe/0x5c0 net/core/dev.c:6508 napi_poll net/core/dev.c:6575 [inline] net_rx_action+0x595/0xdd0 net/core/dev.c:6686 __do_softirq+0x1d8/0x661 kernel/softirq.c:613 The buggy address belongs to the object at ffff888128ec6000 which belongs to the cache skbuff_head_cache of size 256 The buggy address is located 4 bytes inside of 256-byte region [ffff888128ec6000, ffff888128ec6100) The buggy address belongs to the physical page: page:ffffea0004a3b180 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x128ec6 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 0000000000000000 dead000000000122 ffff888100b91c80 raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 291, tgid 285 (syz-fuzzer), ts 70393848171, free_ts 70370342986 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x213/0x220 mm/page_alloc.c:2581 prep_new_page mm/page_alloc.c:2588 [inline] get_page_from_freelist+0x276c/0x2850 mm/page_alloc.c:4385 __alloc_pages+0x3a1/0x780 mm/page_alloc.c:5662 allocate_slab mm/slub.c:1959 [inline] new_slab+0xce/0x4c0 mm/slub.c:2012 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3200 __slab_alloc+0x5d/0xa0 mm/slub.c:3299 slab_alloc_node mm/slub.c:3384 [inline] kmem_cache_alloc_node+0x1c9/0x2d0 mm/slub.c:3463 __alloc_skb+0xcc/0x2c0 net/core/skbuff.c:497 alloc_skb include/linux/skbuff.h:1275 [inline] __tcp_send_ack+0x95/0x6c0 net/ipv4/tcp_output.c:3960 tcp_send_ack+0x3b/0x60 net/ipv4/tcp_output.c:3992 __tcp_cleanup_rbuf+0x1ee/0x480 net/ipv4/tcp.c:1618 tcp_cleanup_rbuf net/ipv4/tcp.c:1629 [inline] tcp_recvmsg_locked+0x1c07/0x24c0 net/ipv4/tcp.c:2641 tcp_recvmsg+0x258/0x920 net/ipv4/tcp.c:2671 inet_recvmsg+0x14e/0x500 net/ipv4/af_inet.c:864 sock_recvmsg_nosec net/socket.c:1000 [inline] sock_recvmsg net/socket.c:1018 [inline] sock_read_iter+0x3b2/0x4b0 net/socket.c:1091 call_read_iter include/linux/fs.h:2209 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x771/0xad0 fs/read_write.c:470 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1493 [inline] free_pcp_prepare mm/page_alloc.c:1567 [inline] free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3484 free_unref_page+0x8d/0x480 mm/page_alloc.c:3580 free_the_page mm/page_alloc.c:793 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5751 __vunmap+0x9f3/0xb60 mm/vmalloc.c:2728 free_work+0x5b/0x80 mm/vmalloc.c:98 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2296 worker_thread+0xa60/0x1260 kernel/workqueue.c:2443 kthread+0x26d/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Memory state around the buggy address: ffff888128ec5f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888128ec5f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888128ec6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888128ec6080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888128ec6100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ================================================================== EXT4-fs error (device loop3): ext4_read_block_bitmap_nowait:438: comm syz-executor.3: Invalid block bitmap block 4294967295 in block_group 0