================================================================== BUG: KCSAN: data-race in virtqueue_disable_cb / virtqueue_disable_cb read to 0xffff888103249478 of 2 bytes by interrupt on cpu 1: 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:422 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:834 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0x3c/0xb0 arch/x86/kernel/irq.c:257 common_interrupt+0x7a/0x90 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636 is_atomic kernel/kcsan/core.c:249 [inline] should_watch kernel/kcsan/core.c:277 [inline] check_access kernel/kcsan/core.c:752 [inline] __tsan_read4+0xe8/0x180 kernel/kcsan/core.c:1024 avc_search_node security/selinux/avc.c:532 [inline] avc_lookup security/selinux/avc.c:560 [inline] avc_has_perm_noaudit+0xa2/0x210 security/selinux/avc.c:1153 avc_has_perm+0x62/0x150 security/selinux/avc.c:1191 inode_has_perm security/selinux/hooks.c:1644 [inline] file_has_perm+0x341/0x380 security/selinux/hooks.c:1734 selinux_revalidate_file_permission security/selinux/hooks.c:3559 [inline] selinux_file_permission+0x325/0x350 security/selinux/hooks.c:3580 security_file_permission+0x3f/0x70 security/security.c:2546 rw_verify_area fs/read_write.c:374 [inline] vfs_read+0x130/0x5c0 fs/read_write.c:461 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 write to 0xffff888103249478 of 2 bytes by interrupt on cpu 0: 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:2149 __netdev_start_xmit include/linux/netdevice.h:4910 [inline] netdev_start_xmit include/linux/netdevice.h:4924 [inline] xmit_one net/core/dev.c:3537 [inline] dev_hard_start_xmit+0x11b/0x3f0 net/core/dev.c:3553 sch_direct_xmit+0x1b0/0x570 net/sched/sch_generic.c:342 __dev_xmit_skb net/core/dev.c:3764 [inline] __dev_queue_xmit+0xe5f/0x1d10 net/core/dev.c:4169 dev_queue_xmit include/linux/netdevice.h:3088 [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:230 ip_finish_output+0xf4/0x240 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:292 [inline] ip_output+0xe5/0x1b0 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:458 [inline] ip_local_out net/ipv4/ip_output.c:127 [inline] __ip_queue_xmit+0xa4d/0xa70 net/ipv4/ip_output.c:534 ip_queue_xmit+0x38/0x40 net/ipv4/ip_output.c:548 __tcp_transmit_skb+0x1231/0x1710 net/ipv4/tcp_output.c:1401 __tcp_send_ack+0x1de/0x2d0 net/ipv4/tcp_output.c:4072 tcp_send_ack+0x27/0x30 net/ipv4/tcp_output.c:4078 __tcp_ack_snd_check+0x2d5/0x500 net/ipv4/tcp_input.c:5542 tcp_ack_snd_check net/ipv4/tcp_input.c:5588 [inline] tcp_rcv_established+0x6ac/0xea0 net/ipv4/tcp_input.c:6028 tcp_v4_do_rcv+0x2d4/0x630 net/ipv4/tcp_ipv4.c:1726 tcp_v4_rcv+0x1913/0x1b70 net/ipv4/tcp_ipv4.c:2148 ip_protocol_deliver_rcu+0x356/0x6d0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x13c/0x1a0 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:303 [inline] ip_local_deliver+0xec/0x1c0 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:468 [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+0x4e1/0x5b0 net/ipv4/ip_input.c:638 ip_list_rcv+0x25e/0x290 net/ipv4/ip_input.c:673 __netif_receive_skb_list_ptype net/core/dev.c:5495 [inline] __netif_receive_skb_list_core+0x356/0x460 net/core/dev.c:5543 __netif_receive_skb_list net/core/dev.c:5595 [inline] netif_receive_skb_list_internal+0x4e6/0x660 net/core/dev.c:5686 gro_normal_list include/net/gro.h:439 [inline] napi_complete_done+0x1cb/0x450 net/core/dev.c:6026 virtqueue_napi_complete drivers/net/virtio_net.c:408 [inline] virtnet_poll+0x763/0xab0 drivers/net/virtio_net.c:1967 __napi_poll+0x60/0x3b0 net/core/dev.c:6460 napi_poll net/core/dev.c:6527 [inline] net_rx_action+0x32b/0x750 net/core/dev.c:6660 __do_softirq+0xc1/0x265 kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0x3b/0x90 kernel/softirq.c:644 common_interrupt+0x7f/0x90 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636 is_atomic kernel/kcsan/core.c:249 [inline] should_watch kernel/kcsan/core.c:277 [inline] check_access kernel/kcsan/core.c:752 [inline] __tsan_read4+0xe4/0x180 kernel/kcsan/core.c:1024 crc32_body lib/crc32.c:110 [inline] crc32_le_generic lib/crc32.c:179 [inline] __crc32c_le_base+0xd4/0x520 lib/crc32.c:201 chksum_update+0x32/0x50 crypto/crc32c_generic.c:88 crypto_shash_update+0x136/0x1a0 crypto/shash.c:134 ext4_chksum fs/ext4/ext4.h:2458 [inline] ext4_inode_bitmap_csum_set+0x129/0x230 fs/ext4/bitmap.c:51 ext4_free_inode+0x520/0x810 fs/ext4/ialloc.c:330 ext4_evict_inode+0xb1e/0xdc0 fs/ext4/inode.c:303 evict+0x1aa/0x410 fs/inode.c:665 iput_final fs/inode.c:1791 [inline] iput+0x42c/0x5b0 fs/inode.c:1817 do_unlinkat+0x2b9/0x4f0 fs/namei.c:4402 __do_sys_unlink fs/namei.c:4443 [inline] __se_sys_unlink fs/namei.c:4441 [inline] __x64_sys_unlink+0x30/0x40 fs/namei.c:4441 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: 9563 Comm: syz-executor.4 Not tainted 6.5.0-rc1-syzkaller-00152-g4b810bf037e5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 ==================================================================