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================================================================== BUG: KCSAN: data-race in generic_file_read_iter / ondemand_readahead write to 0xffff88812ac0b0b0 of 8 bytes by task 28062 on cpu 0: generic_file_buffered_read mm/filemap.c:2240 [inline] generic_file_read_iter+0xb0f/0x18c0 mm/filemap.c:2309 ext4_file_read_iter fs/ext4/file.c:131 [inline] ext4_file_read_iter+0x103/0x360 fs/ext4/file.c:114 call_read_iter include/linux/fs.h:1901 [inline] generic_file_splice_read+0x2df/0x470 fs/splice.c:313 do_splice_to+0xc7/0x100 fs/splice.c:892 splice_direct_to_actor+0x1b9/0x540 fs/splice.c:971 do_splice_direct+0x152/0x1d0 fs/splice.c:1080 do_sendfile+0x380/0x800 fs/read_write.c:1521 __do_sys_sendfile64 fs/read_write.c:1582 [inline] __se_sys_sendfile64 fs/read_write.c:1568 [inline] __x64_sys_sendfile64+0x121/0x140 fs/read_write.c:1568 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88812ac0b0b0 of 8 bytes by task 28056 on cpu 1: ondemand_readahead+0x1a8/0x730 mm/readahead.c:452 page_cache_sync_readahead+0x1b0/0x1e0 mm/readahead.c:527 generic_file_buffered_read mm/filemap.c:2036 [inline] generic_file_read_iter+0xf24/0x18c0 mm/filemap.c:2309 ext4_file_read_iter fs/ext4/file.c:131 [inline] ext4_file_read_iter+0x103/0x360 fs/ext4/file.c:114 call_read_iter include/linux/fs.h:1901 [inline] generic_file_splice_read+0x2df/0x470 fs/splice.c:313 do_splice_to+0xc7/0x100 fs/splice.c:892 splice_direct_to_actor+0x1b9/0x540 fs/splice.c:971 do_splice_direct+0x152/0x1d0 fs/splice.c:1080 do_sendfile+0x380/0x800 fs/read_write.c:1521 __do_sys_sendfile64 fs/read_write.c:1582 [inline] __se_sys_sendfile64 fs/read_write.c:1568 [inline] __x64_sys_sendfile64+0x121/0x140 fs/read_write.c:1568 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 28056 Comm: syz-executor.1 Not tainted 5.7.0-rc1-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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020/05/25 09:11 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | 11284182 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
| 2020/04/17 22:49 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | 435c6d53 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
| 2020/04/08 16:33 | https://github.com/google/ktsan.git kcsan | 40959e34d670 | db9bcd4b | .config | console log | report | ci2-upstream-kcsan-gce | |||||
| 2020/03/19 10:22 | https://github.com/google/ktsan.git kcsan | 40959e34d670 | 2c31c529 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
| 2020/03/03 13:30 | https://github.com/google/ktsan.git kcsan | 766d004d1b85 | 350a7a26 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
| 2020/02/25 04:02 | https://github.com/google/ktsan.git kcsan | 766d004d1b85 | 59b57593 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
| 2019/12/19 01:42 | https://github.com/google/ktsan.git kcsan | 245a43005292 | 79b211f7 | .config | console log | report | ci2-upstream-kcsan-gce |