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Message-ID: <000000000000736bd406151001d7@google.com> Date: Mon, 01 Apr 2024 14:52:28 -0700 From: syzbot <syzbot+549710bad9c798e25b15@...kaller.appspotmail.com> To: davem@...emloft.net, herbert@...dor.apana.org.au, linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: [syzbot] [crypto?] KMSAN: uninit-value in __crc32c_le_base (4) Hello, syzbot found the following issue on: HEAD commit: 8d025e2092e2 Merge tag 'erofs-for-6.9-rc2-fixes' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1385be41180000 kernel config: https://syzkaller.appspot.com/x/.config?x=e2599baf258ef795 dashboard link: https://syzkaller.appspot.com/bug?extid=549710bad9c798e25b15 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5ccde1a19e22/disk-8d025e20.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/45420817e7d9/vmlinux-8d025e20.xz kernel image: https://storage.googleapis.com/syzbot-assets/354bdafd8c8f/bzImage-8d025e20.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+549710bad9c798e25b15@...kaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in crc32_body lib/crc32.c:110 [inline] BUG: KMSAN: uninit-value in crc32_le_generic lib/crc32.c:179 [inline] BUG: KMSAN: uninit-value in __crc32c_le_base+0x43c/0xd80 lib/crc32.c:201 crc32_body lib/crc32.c:110 [inline] crc32_le_generic lib/crc32.c:179 [inline] __crc32c_le_base+0x43c/0xd80 lib/crc32.c:201 chksum_update+0x5b/0xd0 crypto/crc32c_generic.c:88 crypto_shash_update+0x79/0xa0 crypto/shash.c:70 csum_tree_block+0x35f/0x5d0 fs/btrfs/disk-io.c:96 btree_csum_one_bio+0x4d5/0xeb0 fs/btrfs/disk-io.c:294 btrfs_bio_csum fs/btrfs/bio.c:538 [inline] btrfs_submit_chunk fs/btrfs/bio.c:741 [inline] btrfs_submit_bio+0x1eb6/0x2930 fs/btrfs/bio.c:770 write_one_eb+0x13fa/0x1570 fs/btrfs/extent_io.c:1750 submit_eb_page fs/btrfs/extent_io.c:1909 [inline] btree_write_cache_pages+0x1d2a/0x29a0 fs/btrfs/extent_io.c:1959 btree_writepages+0x84/0x270 fs/btrfs/disk-io.c:516 do_writepages+0x427/0xc30 mm/page-writeback.c:2612 filemap_fdatawrite_wbc+0x1d8/0x270 mm/filemap.c:397 __filemap_fdatawrite_range mm/filemap.c:430 [inline] filemap_fdatawrite_range+0xe1/0x110 mm/filemap.c:448 btrfs_write_marked_extents+0x2e7/0x620 fs/btrfs/transaction.c:1154 btrfs_sync_log+0x9fd/0x3830 fs/btrfs/tree-log.c:2969 btrfs_sync_file+0x144c/0x1c60 fs/btrfs/file.c:1968 vfs_fsync_range+0x20d/0x270 fs/sync.c:188 generic_write_sync include/linux/fs.h:2793 [inline] btrfs_do_write_iter+0x1c5f/0x2270 fs/btrfs/file.c:1695 btrfs_file_write_iter+0x38/0x50 fs/btrfs/file.c:1705 call_write_iter include/linux/fs.h:2108 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xb63/0x1520 fs/read_write.c:590 ksys_write+0x20f/0x4c0 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0x93/0xe0 fs/read_write.c:652 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 Uninit was created at: __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598 __alloc_pages_bulk+0x19e/0x21e0 mm/page_alloc.c:4523 alloc_pages_bulk_array include/linux/gfp.h:202 [inline] btrfs_alloc_page_array+0x9e/0x460 fs/btrfs/extent_io.c:689 alloc_eb_folio_array fs/btrfs/extent_io.c:724 [inline] alloc_extent_buffer+0xa68/0x4180 fs/btrfs/extent_io.c:3859 btrfs_find_create_tree_block+0x46/0x60 fs/btrfs/disk-io.c:610 btrfs_init_new_buffer fs/btrfs/extent-tree.c:5063 [inline] btrfs_alloc_tree_block+0x35c/0x17c0 fs/btrfs/extent-tree.c:5178 btrfs_alloc_log_tree_node fs/btrfs/disk-io.c:960 [inline] btrfs_add_log_tree+0x1b7/0x7a0 fs/btrfs/disk-io.c:1008 start_log_trans fs/btrfs/tree-log.c:208 [inline] btrfs_log_inode_parent+0x9b6/0x1dd0 fs/btrfs/tree-log.c:7066 btrfs_log_dentry_safe+0x9a/0x100 fs/btrfs/tree-log.c:7171 btrfs_sync_file+0x126c/0x1c60 fs/btrfs/file.c:1933 vfs_fsync_range+0x20d/0x270 fs/sync.c:188 generic_write_sync include/linux/fs.h:2793 [inline] btrfs_do_write_iter+0x1c5f/0x2270 fs/btrfs/file.c:1695 btrfs_file_write_iter+0x38/0x50 fs/btrfs/file.c:1705 call_write_iter include/linux/fs.h:2108 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xb63/0x1520 fs/read_write.c:590 ksys_write+0x20f/0x4c0 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0x93/0xe0 fs/read_write.c:652 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 CPU: 1 PID: 5344 Comm: syz-executor.4 Not tainted 6.9.0-rc1-syzkaller-00061-g8d025e2092e2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
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