[EXT4 FS bs=4096, gc=1, bpg=71, ipg=32, mo=a80ec0a8, mo2=0000] System zones: 0-2, 18-18, 34-34 EXT4-fs (loop5): 1 orphan inode deleted ext4 filesystem being mounted at /root/syzkaller-testdir3473791171/syzkaller.cDqEEb/2416/file1 supports timestamps until 2038-01-19 (0x7fffffff) ================================================================== BUG: KCSAN: data-race in _copy_to_iter / copy_page_from_iter_atomic read to 0xffff888156752c00 of 1024 bytes by task 14620 on cpu 1: instrument_copy_to_user include/linux/instrumented.h:113 [inline] copyout lib/iov_iter.c:167 [inline] _copy_to_iter+0x12b/0x950 lib/iov_iter.c:316 copy_page_to_iter+0x171/0x2b0 lib/iov_iter.c:481 copy_folio_to_iter include/linux/uio.h:185 [inline] filemap_read+0x424/0x680 mm/filemap.c:2706 blkdev_read_iter+0x217/0x2c0 block/fops.c:734 call_read_iter include/linux/fs.h:1979 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x3da/0x5c0 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 write to 0xffff888156752000 of 4096 bytes by task 5378 on cpu 0: instrument_copy_from_user_before include/linux/instrumented.h:130 [inline] copyin lib/iov_iter.c:192 [inline] copy_page_from_iter_atomic+0x282/0xcf0 lib/iov_iter.c:590 copy_folio_from_iter_atomic include/linux/uio.h:191 [inline] iomap_write_iter fs/iomap/buffered-io.c:920 [inline] iomap_file_buffered_write+0x383/0x570 fs/iomap/buffered-io.c:968 blkdev_buffered_write block/fops.c:634 [inline] blkdev_write_iter+0x307/0x3e0 block/fops.c:688 call_write_iter include/linux/fs.h:1985 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x4ab/0x7d0 fs/read_write.c:584 ksys_write+0xeb/0x1a0 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+0x42/0x50 fs/read_write.c:646 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 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 5378 Comm: syz-executor.5 Not tainted 6.5.0-syzkaller-08894-gb97d64c72259 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 ==================================================================