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================================================================== BUG: KCSAN: data-race in copyout / fat16_ent_put write to 0xffff88811be3940a of 2 bytes by task 17795 on cpu 1: fat16_ent_put+0x54/0x90 fs/fat/fatent.c:181 fat_alloc_clusters+0x4e1/0xbf0 fs/fat/fatent.c:501 fat_add_cluster+0x3b/0xd0 fs/fat/inode.c:108 __fat_get_block fs/fat/inode.c:155 [inline] fat_get_block+0x3c6/0x4f0 fs/fat/inode.c:190 __block_write_begin_int+0x306/0xf80 fs/buffer.c:2008 __block_write_begin fs/buffer.c:2058 [inline] block_write_begin+0x76/0x160 fs/buffer.c:2117 cont_write_begin+0x3bd/0x660 fs/buffer.c:2466 fat_write_begin+0x69/0xc0 fs/fat/inode.c:236 generic_perform_write+0x13a/0x320 mm/filemap.c:3287 __generic_file_write_iter+0x240/0x370 mm/filemap.c:3416 generic_file_write_iter+0x294/0x38e mm/filemap.c:3448 call_write_iter include/linux/fs.h:1901 [inline] new_sync_write+0x303/0x400 fs/read_write.c:483 __vfs_write+0x9e/0xb0 fs/read_write.c:496 vfs_write fs/read_write.c:558 [inline] vfs_write+0x189/0x380 fs/read_write.c:542 ksys_write+0xc5/0x1a0 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x49/0x60 fs/read_write.c:620 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88811be39000 of 1377 bytes by task 17797 on cpu 0: instrument_copy_to_user include/linux/instrumented.h:89 [inline] copyout+0x9b/0xb0 lib/iov_iter.c:142 copy_page_to_iter_iovec lib/iov_iter.c:212 [inline] copy_page_to_iter+0x25c/0x910 lib/iov_iter.c:921 generic_file_buffered_read mm/filemap.c:2122 [inline] generic_file_read_iter+0x96a/0x1490 mm/filemap.c:2302 blkdev_read_iter+0xae/0xe0 fs/block_dev.c:2039 call_read_iter include/linux/fs.h:1895 [inline] new_sync_read+0x306/0x450 fs/read_write.c:414 __vfs_read+0x9e/0xb0 fs/read_write.c:427 vfs_read fs/read_write.c:461 [inline] vfs_read+0x13e/0x2b0 fs/read_write.c:446 ksys_read+0xc5/0x1a0 fs/read_write.c:587 __do_sys_read fs/read_write.c:597 [inline] __se_sys_read fs/read_write.c:595 [inline] __x64_sys_read+0x49/0x60 fs/read_write.c:595 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 17797 Comm: blkid Not tainted 5.6.0-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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/04/01 01:30 | https://github.com/google/ktsan.git kcsan | 40959e34d670 | a34e2c33 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/03/30 19:07 | https://github.com/google/ktsan.git kcsan | 40959e34d670 | c8d1cc20 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/03/22 02:54 | https://github.com/google/ktsan.git kcsan | 40959e34d670 | 78267cec | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/03/19 06:27 | https://github.com/google/ktsan.git kcsan | 40959e34d670 | 2c31c529 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/03/02 21:47 | https://github.com/google/ktsan.git kcsan | 766d004d1b85 | 4a4e0509 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/02/26 08:38 | https://github.com/google/ktsan.git kcsan | 766d004d1b85 | 4f588111 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/02/19 12:38 | https://github.com/google/ktsan.git kcsan | b12d66a6c34f | 135c18aa | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/02/18 16:55 | https://github.com/google/ktsan.git kcsan | b12d66a6c34f | 012fbc32 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/02/09 08:54 | https://github.com/google/ktsan.git kcsan | f60f0f543333 | 06150bf1 | .config | console log | report | ci2-upstream-kcsan-gce |