================================================================== BUG: KCSAN: data-race in random_recv_done / virtio_read write to 0xffff888101a7becc of 4 bytes by interrupt on cpu 1: random_recv_done+0x58/0x80 drivers/char/hw_random/virtio-rng.c:45 vring_interrupt+0x14c/0x170 drivers/virtio/virtio_ring.c:2462 __handle_irq_event_percpu+0x92/0x400 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x60/0xf0 kernel/irq/handle.c:210 handle_edge_irq+0x17e/0x5a0 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+0x60/0x100 arch/x86/kernel/irq.c:250 common_interrupt+0x9a/0xc0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x22/0x40 is_atomic kernel/kcsan/core.c:258 [inline] should_watch kernel/kcsan/core.c:275 [inline] check_access kernel/kcsan/core.c:741 [inline] __tsan_read8+0x132/0x180 kernel/kcsan/core.c:1014 crypto_shash_alg include/crypto/hash.h:776 [inline] crypto_shash_update+0x4d/0x1a0 crypto/shash.c:125 ext4_chksum fs/ext4/ext4.h:2465 [inline] ext4_inode_csum+0x28a/0x490 fs/ext4/inode.c:69 ext4_inode_csum_set fs/ext4/inode.c:115 [inline] ext4_fill_raw_inode+0xd5f/0xea0 fs/ext4/inode.c:4433 ext4_do_update_inode fs/ext4/inode.c:5146 [inline] ext4_mark_iloc_dirty+0x364/0x860 fs/ext4/inode.c:5741 __ext4_mark_inode_dirty+0x452/0x610 fs/ext4/inode.c:5937 ext4_evict_inode+0x9d4/0xe90 fs/ext4/inode.c:279 evict+0x1aa/0x410 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput+0x3f9/0x580 fs/inode.c:1774 do_unlinkat+0x2b3/0x510 fs/namei.c:4304 __do_sys_unlink fs/namei.c:4345 [inline] __se_sys_unlink fs/namei.c:4343 [inline] __x64_sys_unlink+0x2c/0x30 fs/namei.c:4343 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd write to 0xffff888101a7becc of 4 bytes by task 13058 on cpu 0: request_entropy drivers/char/hw_random/virtio-rng.c:56 [inline] copy_data drivers/char/hw_random/virtio-rng.c:74 [inline] virtio_read+0x190/0x430 drivers/char/hw_random/virtio-rng.c:92 rng_get_data drivers/char/hw_random/core.c:191 [inline] rng_dev_read+0x1b4/0x630 drivers/char/hw_random/core.c:228 do_iter_read+0x2d5/0x760 fs/read_write.c:792 vfs_readv fs/read_write.c:910 [inline] do_preadv+0x159/0x230 fs/read_write.c:1002 __do_sys_preadv fs/read_write.c:1052 [inline] __se_sys_preadv fs/read_write.c:1047 [inline] __x64_sys_preadv+0x54/0x60 fs/read_write.c:1047 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x00000040 -> 0x00000000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 13058 Comm: syz-executor.5 Not tainted 6.0.0-rc5-syzkaller-00015-ge839a756012b-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 ==================================================================