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================================================================== BUG: KCSAN: data-race in __mpage_writepage / generic_write_end write to 0xffff8881376297a8 of 8 bytes by task 15398 on cpu 1: i_size_write include/linux/fs.h:871 [inline] generic_write_end+0x98/0x250 fs/buffer.c:2186 fat_write_end+0x4a/0x150 fs/fat/inode.c:249 generic_perform_write+0x23e/0x3a0 mm/filemap.c:3340 __generic_file_write_iter+0x15c/0x330 mm/filemap.c:3458 generic_file_write_iter+0x75/0x130 mm/filemap.c:3490 call_write_iter include/linux/fs.h:1903 [inline] do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740 do_iter_write+0x112/0x4b0 fs/read_write.c:866 vfs_iter_write+0x4c/0x70 fs/read_write.c:907 iter_file_splice_write+0x42a/0x780 fs/splice.c:686 do_splice_from fs/splice.c:764 [inline] direct_splice_actor+0x80/0xa0 fs/splice.c:933 splice_direct_to_actor+0x345/0x650 fs/splice.c:888 do_splice_direct+0xf5/0x170 fs/splice.c:976 do_sendfile+0x5db/0xca0 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 read to 0xffff8881376297a8 of 8 bytes by task 15403 on cpu 0: i_size_read include/linux/fs.h:849 [inline] __mpage_writepage+0x9a/0x1060 fs/mpage.c:501 write_cache_pages+0x4bc/0x7f0 mm/page-writeback.c:2246 mpage_writepages+0x6d/0x120 fs/mpage.c:714 fat_writepages+0x20/0x30 fs/fat/inode.c:205 do_writepages+0x7b/0x150 mm/page-writeback.c:2352 __filemap_fdatawrite_range+0x19d/0x1d0 mm/filemap.c:422 filemap_write_and_wait_range+0x8b/0x2a0 mm/filemap.c:655 generic_file_read_iter+0x11e/0x3d0 mm/filemap.c:2523 call_read_iter include/linux/fs.h:1897 [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+0x5db/0xca0 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: 15403 Comm: syz-executor.3 Not tainted 5.10.0-rc6-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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/12/03 12:22 | upstream | 34816d20f173 | 59ad4022 | .config | console log | report | info | ci2-upstream-kcsan-gce |