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================================================================== BUG: KCSAN: data-race in ext4_es_lookup_extent / ext4_es_lookup_extent read to 0xffff88810d8dd6d8 of 8 bytes by task 13277 on cpu 1: ext4_es_lookup_extent+0x2a8/0x500 fs/ext4/extents_status.c:966 ext4_map_blocks+0x105/0xfc0 fs/ext4/inode.c:520 ext4_iomap_begin+0x167/0x690 fs/ext4/inode.c:3470 iomap_apply+0x8d/0x4a0 fs/iomap/apply.c:46 __iomap_dio_rw+0x448/0x9b0 fs/iomap/direct-io.c:517 iomap_dio_rw+0x30/0x70 fs/iomap/direct-io.c:605 ext4_dio_read_iter fs/ext4/file.c:77 [inline] ext4_file_read_iter+0x3bd/0x420 fs/ext4/file.c:129 call_read_iter include/linux/fs.h:1881 [inline] generic_file_splice_read+0x22a/0x310 fs/splice.c:311 do_splice_to fs/splice.c:788 [inline] splice_direct_to_actor+0x2aa/0x650 fs/splice.c:867 do_splice_direct+0xf5/0x170 fs/splice.c:976 do_sendfile+0x574/0xb70 fs/read_write.c:1257 __do_sys_sendfile64 fs/read_write.c:1318 [inline] __se_sys_sendfile64 fs/read_write.c:1304 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1304 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff88810d8dd6d8 of 8 bytes by task 13287 on cpu 0: ext4_es_set_referenced fs/ext4/extents_status.h:194 [inline] ext4_es_lookup_extent+0x2f7/0x500 fs/ext4/extents_status.c:968 ext4_map_blocks+0x105/0xfc0 fs/ext4/inode.c:520 ext4_iomap_begin+0x167/0x690 fs/ext4/inode.c:3470 iomap_apply+0x8d/0x4a0 fs/iomap/apply.c:46 __iomap_dio_rw+0x448/0x9b0 fs/iomap/direct-io.c:517 iomap_dio_rw+0x30/0x70 fs/iomap/direct-io.c:605 ext4_dio_read_iter fs/ext4/file.c:77 [inline] ext4_file_read_iter+0x3bd/0x420 fs/ext4/file.c:129 call_read_iter include/linux/fs.h:1881 [inline] generic_file_splice_read+0x22a/0x310 fs/splice.c:311 do_splice_to fs/splice.c:788 [inline] splice_direct_to_actor+0x2aa/0x650 fs/splice.c:867 do_splice_direct+0xf5/0x170 fs/splice.c:976 do_sendfile+0x574/0xb70 fs/read_write.c:1257 __do_sys_sendfile64 fs/read_write.c:1318 [inline] __se_sys_sendfile64 fs/read_write.c:1304 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1304 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 13287 Comm: syz-executor.0 Not tainted 5.10.0-rc3-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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020/11/14 08:59 | upstream | 9e6a39eae450 | 1bf9a662 | .config | console log | report | info | ci2-upstream-kcsan-gce |