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Sun, 13 Oct 2024 23:08:34 -0700 (PDT) Date: Sun, 13 Oct 2024 23:08:34 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <670cb562.050a0220.4cbc0.0042.GAE@google.com> Subject: [syzbot] [fs?] [mm?] KCSAN: data-race in xas_create / xas_find (8) From: syzbot To: akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, willy@infradead.org Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam03 X-Rspam-User: X-Rspamd-Queue-Id: 34ABA1C001E X-Stat-Signature: 4t4rs4hw4hjzgsxjabcqof99emhiw1cn X-HE-Tag: 1728886108-777818 X-HE-Meta: U2FsdGVkX1+tUA7PyaFcFCnVmMtFnzfNl3DOn6DCl820VNd4zcivlSWE3L8rxKA48v5y+3QiV1xzmn30r07HPueBw6F9LQI8kFX9MxMfJnxxwsIFX5gJ7YqD7muB/KBbGmUzCWMJx+GHp5CIGHr5D+gizUMSNldOjVr+S9ZrFuCBToP72GDHhbkWEBlAgPWW6W9I28brYUxFGq4ZYRHyw0Fy3VxQJgo3jIY4w5Vj0GpdIV9vLSswUfqrYnh2d9nOlOGe+ILXG0tAy+Wn0fuigqf9m5AkEf3zaq2PhFtj1xiLM7TN1WTTi/XrXbyBy8nIU+3VunDZmxpwzp+KzYC29Z6wLHdZR4U2EPF6n1ZBMI/MgDz4g96aoLu3Q8DDl6ERpT0e5xGHmDXuZX5b4R1cvLcXPBNWnmMpGw+VVw+6/T+w+APMcOnxRqD4KMzm3h4d/oWqEpQdDtNE0JbzZQbQxghKIko239+mPaWxBQzsQLZXGfCXSKMUJ/MzP3Om8NMyjFrK6sD8ljGaOayDKkbCBdImsHIScnSaN91vWGcLPOt+Dn/W5jPOaOCIiJRwBF5XiO9xy6FMhyY92cECSsSQtomjbeRF9k097RdQu3OiG2P5vdYqeEGaejdExWio1wltEE0Sc8gM5gZWNBtyrKNm3HovHUO3R1JAy6YXfjwrtNUXDla4108eFK8W7xLrUAkjZpwqHzrJ4bVoCeV6diBU/H4ePJxZcn4wyOPNDe5r4x5RkVW85LZuY30282bqQuZz8Tpi8en1NV/inZIREVUJtk6XYXTkBbmCOc64A2GuC17m00wSDf6yOBgwoKIbZOldlltIARqr1V/6yPN6NcmY40rNBJuom+No3708/wynK31VKVEal6z4vv3VCSWrKZzP8aE/DFkR+l19z/OQQlNvm75KsYk0myoRMTBfBXo8Q/tEvMCb65KUHmRJ3T1OFf9TxPyj6Pb9gRnRVRz3b43 ruBIV7Om 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 RVhTXwbb 5FPmDEaqm6pCm/d8nLmfOIm3GttlxLqQmmTduJ3mr+9MTGnbSpGdWcrRDYSI0gYduQ5IIL4GVE9/ZaX532hrlQEroMZJ4/Rbx4DLde02xapDXc8IvpGz3vUt9DpjvzUhYxqgp5kZCTD957RPP3T88itCPNmwwWnNzRkRNSgYvt6YdWtLuD1YBsbZyj4LadkmxiJtJYTnmNlTnnKbOhz/dIT8kp6CfPLZZ1rH7cgwB6GFiYPfhv8ALLRqQVvA+gMJnU0h1uzDj36q08+is4eELER74vzxsvxynyzMMiFMI5RCwi9uY7K+xLBsL0X5Ep47Tr/Lnyz5Tza7c6rjfgaztnBX+CbalafjkDQ5tBV0uM8bAgs7uPvrNEq81eMbiGijv6dlYyZmNeLNwLS8NwMDAVUX14ktv1LY X-Bogosity: Ham, tests=bogofilter, spamicity=0.000035, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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@syzkaller.appspotmail.com 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@googlegroups.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