Hello, syzbot found the following issue on: HEAD commit: 2f91ff27b0ee Merge tag 'sound-6.12-rc2' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=155c879f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=95098faba89c70c9 dashboard link: https://syzkaller.appspot.com/bug?extid=b79be83906cd9bab16ff 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/14933c4ac457/disk-2f91ff27.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6725831fc1a1/vmlinux-2f91ff27.xz kernel image: https://storage.googleapis.com/syzbot-assets/98d64e038e72/bzImage-2f91ff27.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b79be83906cd9bab16ff@xxxxxxxxxxxxxxxxxxxxxxxxx loop4: detected capacity change from 0 to 4096 EXT4-fs: Ignoring removed nobh option EXT4-fs: Ignoring removed i_version option ================================================================== BUG: KCSAN: data-race in xas_create / xas_find write to 0xffff888106819919 of 1 bytes by task 3435 on cpu 0: xas_expand lib/xarray.c:613 [inline] xas_create+0x666/0xbd0 lib/xarray.c:654 xas_store+0x6f/0xc90 lib/xarray.c:788 __filemap_add_folio+0x3cc/0x6f0 mm/filemap.c:916 filemap_add_folio+0x9c/0x1b0 mm/filemap.c:972 page_cache_ra_unbounded+0x175/0x310 mm/readahead.c:268 do_page_cache_ra mm/readahead.c:320 [inline] force_page_cache_ra mm/readahead.c:349 [inline] page_cache_sync_ra+0x252/0x670 mm/readahead.c:562 page_cache_sync_readahead include/linux/pagemap.h:1394 [inline] filemap_get_pages+0x2c1/0x10e0 mm/filemap.c:2547 filemap_read+0x216/0x680 mm/filemap.c:2645 blkdev_read_iter+0x20e/0x2c0 block/fops.c:765 new_sync_read fs/read_write.c:488 [inline] vfs_read+0x5f6/0x720 fs/read_write.c:569 ksys_read+0xeb/0x1b0 fs/read_write.c:712 __do_sys_read fs/read_write.c:722 [inline] __se_sys_read fs/read_write.c:720 [inline] __x64_sys_read+0x42/0x50 fs/read_write.c:720 x64_sys_call+0x27d3/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff888106819919 of 1 bytes by task 9109 on cpu 1: xas_find+0x372/0x3f0 lib/xarray.c:1278 find_get_entry+0x66/0x390 mm/filemap.c:1992 find_get_entries+0xa4/0x220 mm/filemap.c:2047 truncate_inode_pages_range+0x4ac/0x6b0 mm/truncate.c:378 truncate_inode_pages+0x24/0x30 mm/truncate.c:423 kill_bdev block/bdev.c:91 [inline] set_blocksize+0x258/0x270 block/bdev.c:173 sb_set_blocksize block/bdev.c:182 [inline] sb_min_blocksize+0x63/0xe0 block/bdev.c:198 ext4_load_super fs/ext4/super.c:4992 [inline] __ext4_fill_super fs/ext4/super.c:5213 [inline] ext4_fill_super+0x38b/0x3a10 fs/ext4/super.c:5686 get_tree_bdev+0x256/0x2e0 fs/super.c:1635 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5718 vfs_get_tree+0x56/0x1e0 fs/super.c:1800 do_new_mount+0x227/0x690 fs/namespace.c:3507 path_mount+0x49b/0xb30 fs/namespace.c:3834 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4055 [inline] __se_sys_mount+0x27c/0x2d0 fs/namespace.c:4032 __x64_sys_mount+0x67/0x80 fs/namespace.c:4032 x64_sys_call+0x203e/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0e -> 0x00 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 9109 Comm: syz.4.1794 Not tainted 6.12.0-rc1-syzkaller-00257-g2f91ff27b0ee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ================================================================== EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. --- 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@xxxxxxxxxxxxxxxx. 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
