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================================================================== BUG: KCSAN: data-race in copy_page_from_iter_atomic / copy_page_to_iter read to 0xffff888134227000 of 512 bytes by task 3437 on cpu 0: instrument_copy_to_user include/linux/instrumented.h:119 [inline] copyout lib/iov_iter.c:156 [inline] copy_page_to_iter_iovec lib/iov_iter.c:228 [inline] __copy_page_to_iter lib/iov_iter.c:805 [inline] copy_page_to_iter+0x2cb/0x950 lib/iov_iter.c:833 filemap_read+0xee6/0x1220 mm/filemap.c:2683 generic_file_read_iter+0x75/0x2c0 mm/filemap.c:2779 blkdev_read_iter+0xb9/0xf0 block/fops.c:545 call_read_iter include/linux/fs.h:2157 [inline] new_sync_read fs/read_write.c:404 [inline] vfs_read+0x66c/0x750 fs/read_write.c:485 ksys_read+0xd9/0x190 fs/read_write.c:623 __do_sys_read fs/read_write.c:633 [inline] __se_sys_read fs/read_write.c:631 [inline] __x64_sys_read+0x3e/0x50 fs/read_write.c:631 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae write to 0xffff888134227000 of 4096 bytes by task 24142 on cpu 1: instrument_copy_from_user include/linux/instrumented.h:136 [inline] copyin lib/iov_iter.c:167 [inline] copy_page_from_iter_atomic+0x32f/0xbb0 lib/iov_iter.c:922 generic_perform_write+0x201/0x3e0 mm/filemap.c:3778 __generic_file_write_iter+0x174/0x310 mm/filemap.c:3897 blkdev_write_iter+0x1fd/0x2c0 block/fops.c:519 call_write_iter include/linux/fs.h:2163 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x7bc/0x900 fs/read_write.c:594 ksys_write+0xd9/0x190 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:656 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 24142 Comm: syz-executor.3 Not tainted 5.15.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2021/10/30 07:21 | upstream | a379fbbcb88b | 098b5d53 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in copy_page_from_iter_atomic / copy_page_to_iter |