================================================================== BUG: KCSAN: data-race in bio_chain / bio_endio read to 0xffff888124829b14 of 2 bytes by interrupt on cpu 1: bio_remaining_done block/bio.c:1757 [inline] bio_endio+0x3e/0x4f0 block/bio.c:1787 req_bio_endio block/blk-core.c:242 [inline] blk_update_request+0x427/0x7b0 block/blk-core.c:1462 scsi_end_request+0x6b/0x3e0 drivers/scsi/scsi_lib.c:579 scsi_io_completion+0x11d/0xc80 drivers/scsi/scsi_lib.c:963 scsi_finish_command+0x280/0x380 drivers/scsi/scsi.c:228 scsi_softirq_done+0x259/0x280 drivers/scsi/scsi_lib.c:1477 blk_done_softirq+0x1eb/0x250 block/blk-softirq.c:37 __do_softirq+0x115/0x33f kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0xbb/0xe0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] do_IRQ+0x81/0x130 arch/x86/kernel/irq.c:263 ret_from_intr+0x0/0x19 arch_local_irq_restore arch/x86/include/asm/paravirt.h:756 [inline] kcsan_setup_watchpoint+0x1d4/0x460 kernel/kcsan/core.c:436 check_access kernel/kcsan/core.c:466 [inline] __tsan_read1 kernel/kcsan/core.c:593 [inline] __tsan_read1+0xc2/0x100 kernel/kcsan/core.c:593 memcmp+0x48/0x70 lib/string.c:885 strstr+0x5a/0x80 lib/string.c:953 tomoyo_add_entry security/tomoyo/common.c:2015 [inline] tomoyo_supervisor+0xb7d/0xd20 security/tomoyo/common.c:2101 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission security/tomoyo/file.c:587 [inline] tomoyo_path_permission+0x121/0x160 security/tomoyo/file.c:573 tomoyo_path_perm+0x23e/0x390 security/tomoyo/file.c:838 tomoyo_inode_getattr+0x26/0x40 security/tomoyo/tomoyo.c:129 security_inode_getattr+0x9b/0xd0 security/security.c:1222 vfs_getattr+0x2e/0x70 fs/stat.c:115 vfs_statx+0x102/0x190 fs/stat.c:191 vfs_lstat include/linux/fs.h:3247 [inline] __do_sys_newlstat+0x51/0xb0 fs/stat.c:354 __se_sys_newlstat fs/stat.c:348 [inline] __x64_sys_newlstat+0x3a/0x50 fs/stat.c:348 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff888124829b14 of 2 bytes by task 8154 on cpu 0: bio_set_flag include/linux/bio.h:239 [inline] bio_inc_remaining include/linux/bio.h:689 [inline] bio_chain+0x86/0xb0 block/bio.c:333 __blk_queue_split+0x745/0xb40 block/blk-merge.c:330 blk_mq_make_request+0x104/0xf60 block/blk-mq.c:1959 generic_make_request block/blk-core.c:1064 [inline] generic_make_request+0x196/0x740 block/blk-core.c:1006 submit_bio+0x96/0x3c0 block/blk-core.c:1190 dio_bio_submit fs/direct-io.c:481 [inline] do_blockdev_direct_IO+0x64e1/0x78c0 fs/direct-io.c:1353 __blockdev_direct_IO+0x86/0xa0 fs/direct-io.c:1412 ext4_direct_IO_write fs/ext4/inode.c:3742 [inline] ext4_direct_IO+0x76c/0xfb0 fs/ext4/inode.c:3871 generic_file_direct_write+0x14d/0x2e0 mm/filemap.c:3208 __generic_file_write_iter+0x17e/0x380 mm/filemap.c:3391 ext4_file_write_iter+0x1bd/0xa00 fs/ext4/file.c:268 call_write_iter include/linux/fs.h:1895 [inline] new_sync_write+0x388/0x4a0 fs/read_write.c:483 __vfs_write+0xb1/0xc0 fs/read_write.c:496 vfs_write fs/read_write.c:558 [inline] vfs_write+0x18a/0x390 fs/read_write.c:542 ksys_write+0xd5/0x1b0 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x4c/0x60 fs/read_write.c:620 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 8154 Comm: syz-executor.1 Not tainted 5.4.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================