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================================================================== BUG: KCSAN: data-race in __mpage_writepage / generic_write_end write to 0xffff8880bae0c198 of 8 bytes by task 27486 on cpu 1: i_size_write include/linux/fs.h:876 [inline] generic_write_end+0x99/0x250 fs/buffer.c:2186 fat_write_end+0x4a/0x160 fs/fat/inode.c:249 generic_perform_write+0x23b/0x390 mm/filemap.c:3414 __generic_file_write_iter+0x154/0x330 mm/filemap.c:3532 generic_file_write_iter+0x2f3/0x3e0 mm/filemap.c:3564 call_write_iter include/linux/fs.h:1882 [inline] do_iter_readv_writev+0x32e/0x3d0 fs/read_write.c:713 do_iter_write+0x112/0x4b0 fs/read_write.c:1018 vfs_iter_write+0x4c/0x70 fs/read_write.c:1059 iter_file_splice_write+0x41a/0x770 fs/splice.c:750 do_splice_from fs/splice.c:846 [inline] direct_splice_actor+0x95/0x160 fs/splice.c:1016 splice_direct_to_actor+0x365/0x660 fs/splice.c:971 do_splice_direct+0xf2/0x170 fs/splice.c:1059 do_sendfile+0x56a/0xba0 fs/read_write.c:1540 __do_sys_sendfile64 fs/read_write.c:1601 [inline] __se_sys_sendfile64 fs/read_write.c:1587 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1587 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880bae0c198 of 8 bytes by task 27493 on cpu 0: i_size_read include/linux/fs.h:854 [inline] __mpage_writepage+0x95/0x1070 fs/mpage.c:501 write_cache_pages+0x4cb/0x840 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+0x19b/0x1d0 mm/filemap.c:422 filemap_write_and_wait_range+0x8b/0x2a0 mm/filemap.c:655 generic_file_read_iter+0x11d/0x3e0 mm/filemap.c:2375 call_read_iter include/linux/fs.h:1876 [inline] generic_file_splice_read+0x22b/0x310 fs/splice.c:312 do_splice_to fs/splice.c:870 [inline] splice_direct_to_actor+0x2a8/0x660 fs/splice.c:950 do_splice_direct+0xf2/0x170 fs/splice.c:1059 do_sendfile+0x56a/0xba0 fs/read_write.c:1540 __do_sys_sendfile64 fs/read_write.c:1601 [inline] __se_sys_sendfile64 fs/read_write.c:1587 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1587 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: 27493 Comm: syz-executor.1 Not tainted 5.9.0-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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/09/04 21:42 | upstream | c70672d8d316 | abf9ba4f | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/08/22 20:36 | upstream | c3d8f220d012 | 1da71ab0 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/08/19 12:44 | upstream | 18445bf405cb | db787902 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/08/13 23:53 | upstream | 990f227371a4 | 54ce1ed6 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/07/14 20:26 | upstream | e9919e11e219 | 6f458026 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/07/11 10:41 | upstream | 1df0d8960499 | 7ba05d2d | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/07/10 21:28 | upstream | a581387e415b | 18d18b59 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/07/07 18:47 | upstream | bfe91da29bfa | 08fc4ef1 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/07/01 19:04 | upstream | 7c30b859a947 | 39acb39d | .config | console log | report | ci2-upstream-kcsan-gce |