================================================================== BUG: KCSAN: data-race in virtqueue_disable_cb / virtqueue_disable_cb write to 0xffff888103304d78 of 2 bytes by task 3976 on cpu 1: virtqueue_disable_cb_split drivers/virtio/virtio_ring.c:856 [inline] virtqueue_disable_cb+0x85/0x180 drivers/virtio/virtio_ring.c:2352 start_xmit+0xf0/0xae0 drivers/net/virtio_net.c:2008 __netdev_start_xmit include/linux/netdevice.h:4915 [inline] netdev_start_xmit include/linux/netdevice.h:4929 [inline] xmit_one net/core/dev.c:3578 [inline] dev_hard_start_xmit+0x11b/0x3f0 net/core/dev.c:3594 sch_direct_xmit+0x1b0/0x570 net/sched/sch_generic.c:342 __dev_xmit_skb net/core/dev.c:3805 [inline] __dev_queue_xmit+0xe5f/0x1d10 net/core/dev.c:4210 dev_queue_xmit include/linux/netdevice.h:3085 [inline] neigh_hh_output include/net/neighbour.h:528 [inline] neigh_output include/net/neighbour.h:542 [inline] ip_finish_output2+0x700/0x840 net/ipv4/ip_output.c:229 ip_finish_output+0xf4/0x240 net/ipv4/ip_output.c:317 NF_HOOK_COND include/linux/netfilter.h:292 [inline] ip_output+0xe5/0x1b0 net/ipv4/ip_output.c:431 dst_output include/net/dst.h:458 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] __ip_queue_xmit+0xa4d/0xa70 net/ipv4/ip_output.c:533 ip_queue_xmit+0x38/0x40 net/ipv4/ip_output.c:547 __tcp_transmit_skb+0x1194/0x16e0 net/ipv4/tcp_output.c:1399 __tcp_send_ack+0x1de/0x2d0 net/ipv4/tcp_output.c:3983 tcp_send_ack+0x27/0x30 net/ipv4/tcp_output.c:3989 __tcp_cleanup_rbuf+0x145/0x250 net/ipv4/tcp.c:1619 tcp_cleanup_rbuf net/ipv4/tcp.c:1630 [inline] tcp_recvmsg_locked+0x109d/0x1540 net/ipv4/tcp.c:2652 tcp_recvmsg+0x13b/0x490 net/ipv4/tcp.c:2682 inet_recvmsg+0xa2/0x210 net/ipv4/af_inet.c:859 sock_recvmsg_nosec net/socket.c:1019 [inline] sock_recvmsg net/socket.c:1040 [inline] sock_read_iter+0x1a0/0x210 net/socket.c:1118 call_read_iter include/linux/fs.h:1848 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x39a/0x560 fs/read_write.c:470 ksys_read+0xeb/0x1a0 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+0x42/0x50 fs/read_write.c:621 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff888103304d78 of 2 bytes by interrupt on cpu 0: virtqueue_disable_cb_split drivers/virtio/virtio_ring.c:855 [inline] virtqueue_disable_cb+0x63/0x180 drivers/virtio/virtio_ring.c:2352 skb_xmit_done+0x5f/0x140 drivers/net/virtio_net.c:420 vring_interrupt+0x150/0x170 drivers/virtio/virtio_ring.c:2501 __handle_irq_event_percpu+0x91/0x490 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x64/0xf0 kernel/irq/handle.c:210 handle_edge_irq+0x167/0x590 kernel/irq/chip.c:819 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline] handle_irq arch/x86/kernel/irq.c:231 [inline] __common_interrupt+0x3c/0xb0 arch/x86/kernel/irq.c:250 common_interrupt+0x7a/0x90 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636 kmem_cache_free+0x18b/0x280 free_buffer_head+0x49/0x1d0 fs/buffer.c:2990 try_to_free_buffers+0x130/0x180 fs/buffer.c:2931 jbd2_journal_try_to_free_buffers+0x1b0/0x1d0 fs/jbd2/transaction.c:2196 ext4_release_folio+0x9d/0x190 fs/ext4/inode.c:3170 filemap_release_folio+0xa4/0xe0 mm/filemap.c:4118 block_invalidate_folio+0x31d/0x350 fs/buffer.c:1590 ext4_invalidate_folio+0x73/0x150 fs/ext4/inode.c:3133 folio_invalidate mm/truncate.c:159 [inline] truncate_cleanup_folio mm/truncate.c:179 [inline] truncate_inode_pages_range+0x29f/0x800 mm/truncate.c:368 truncate_inode_pages mm/truncate.c:449 [inline] truncate_inode_pages_final+0x58/0x60 mm/truncate.c:484 ext4_evict_inode+0x174/0xdc0 fs/ext4/inode.c:193 evict+0x1aa/0x410 fs/inode.c:665 iput_final fs/inode.c:1747 [inline] iput+0x42c/0x5b0 fs/inode.c:1773 do_unlinkat+0x2b3/0x4f0 fs/namei.c:4323 __do_sys_unlink fs/namei.c:4364 [inline] __se_sys_unlink fs/namei.c:4362 [inline] __x64_sys_unlink+0x30/0x40 fs/namei.c:4362 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x0000 -> 0x0001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 3054 Comm: syz-executor.0 Not tainted 6.3.0-syzkaller-10620-g33afd4b76393 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 ==================================================================