Hello, syzbot found the following issue on: HEAD commit: 6e4436539ae1 Merge tag 'hid-for-linus-2024081901' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=110c8de5980000 kernel config: https://syzkaller.appspot.com/x/.config?x=3aa0f597417bf8c7 dashboard link: https://syzkaller.appspot.com/bug?extid=fed24898593bed518bec 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/72e87ae72e3c/disk-6e443653.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/226d5b10603c/vmlinux-6e443653.xz kernel image: https://storage.googleapis.com/syzbot-assets/edaf634acf3f/bzImage-6e443653.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fed24898593bed518bec@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 0 to 8192 ================================================================== BUG: KCSAN: data-race in dio_bio_end_io / dio_new_bio read-write to 0xffff888114c1e058 of 8 bytes by interrupt on cpu 1: dio_bio_end_io+0x53/0xd0 fs/direct-io.c:388 bio_endio+0x369/0x410 block/bio.c:1646 blk_update_request+0x382/0x880 block/blk-mq.c:925 blk_mq_end_request+0x26/0x50 block/blk-mq.c:1053 lo_complete_rq+0xce/0x180 drivers/block/loop.c:386 blk_complete_reqs block/blk-mq.c:1128 [inline] blk_done_softirq+0x74/0xb0 block/blk-mq.c:1133 handle_softirqs+0xc3/0x280 kernel/softirq.c:554 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:928 smpboot_thread_fn+0x31c/0x4c0 kernel/smpboot.c:164 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 0xffff888114c1e058 of 8 bytes by task 3990 on cpu 0: dio_bio_reap fs/direct-io.c:551 [inline] dio_new_bio+0x249/0x460 fs/direct-io.c:670 dio_send_cur_page+0x1f2/0x7a0 fs/direct-io.c:751 submit_page_section+0x1a3/0x5b0 fs/direct-io.c:816 do_direct_IO fs/direct-io.c:1031 [inline] __blockdev_direct_IO+0x11c1/0x1e90 fs/direct-io.c:1249 blockdev_direct_IO include/linux/fs.h:3217 [inline] fat_direct_IO+0x110/0x1e0 fs/fat/inode.c:282 generic_file_direct_write+0xaf/0x200 mm/filemap.c:3941 __generic_file_write_iter+0xae/0x120 mm/filemap.c:4107 generic_file_write_iter+0x7d/0x1d0 mm/filemap.c:4147 do_iter_readv_writev+0x3b0/0x470 vfs_writev+0x2e0/0x880 fs/read_write.c:971 do_pwritev fs/read_write.c:1072 [inline] __do_sys_pwritev2 fs/read_write.c:1131 [inline] __se_sys_pwritev2+0x10c/0x1d0 fs/read_write.c:1122 __x64_sys_pwritev2+0x78/0x90 fs/read_write.c:1122 x64_sys_call+0x271f/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:329 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: 0xffff8881151e8e40 -> 0xffff888114d5bd80 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3990 Comm: syz.0.161 Not tainted 6.11.0-rc4-syzkaller-00008-g6e4436539ae1 #0 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
