Hello, syzbot found the following issue on: HEAD commit: 1868f9d0260e Merge tag 'for-linux-6.12-ofs1' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1067ff00580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3b3c9c7ae5fde27e dashboard link: https://syzkaller.appspot.com/bug?extid=cf1fa2a387833ee7edec 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/16d776046b21/disk-1868f9d0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2b09f78f002c/vmlinux-1868f9d0.xz kernel image: https://storage.googleapis.com/syzbot-assets/7705cc7035ce/bzImage-1868f9d0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cf1fa2a387833ee7edec@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KCSAN: data-race in __filemap_add_folio / sync_bdevs read-write to 0xffff8881004c24b0 of 8 bytes by task 2929 on cpu 0: __filemap_add_folio+0x439/0x710 mm/filemap.c:920 filemap_add_folio+0x9c/0x1b0 mm/filemap.c:972 __filemap_get_folio+0x2f1/0x5b0 mm/filemap.c:1960 grow_dev_folio fs/buffer.c:1043 [inline] grow_buffers fs/buffer.c:1109 [inline] __getblk_slow fs/buffer.c:1135 [inline] bdev_getblk+0x173/0x3b0 fs/buffer.c:1437 __getblk include/linux/buffer_head.h:380 [inline] jbd2_journal_get_descriptor_buffer+0xcf/0x210 fs/jbd2/journal.c:974 jbd2_journal_commit_transaction+0xc03/0x33e0 fs/jbd2/commit.c:610 kjournald2+0x20b/0x3c0 fs/jbd2/journal.c:201 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 read to 0xffff8881004c24b0 of 8 bytes by task 1695 on cpu 1: sync_bdevs+0xd6/0x260 block/bdev.c:1228 ksys_sync+0x8c/0xe0 fs/sync.c:106 __do_sys_sync+0xe/0x20 fs/sync.c:113 x64_sys_call+0x2693/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:163 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: 0x0000000000000a25 -> 0x0000000000000a26 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 1695 Comm: syz.0.18383 Tainted: G W 6.11.0-syzkaller-07462-g1868f9d0260e #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 ================================================================== --- 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@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
