Hello, syzbot found the following issue on: HEAD commit: 9b2ffa6148b1 Merge tag 'mtd/fixes-for-6.13-rc5' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10431018580000 kernel config: https://syzkaller.appspot.com/x/.config?x=87d3cfca6847d1fa dashboard link: https://syzkaller.appspot.com/bug?extid=e1d2475cbd1f0c63692f 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/8f3f5cceed80/disk-9b2ffa61.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1ba00b70d91e/vmlinux-9b2ffa61.xz kernel image: https://storage.googleapis.com/syzbot-assets/b99c1bb4d63f/bzImage-9b2ffa61.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e1d2475cbd1f0c63692f@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KCSAN: data-race in read_pages / read_pages read-write to 0xffff8881034df5e0 of 4 bytes by task 9479 on cpu 1: read_pages+0x23f/0x540 mm/readahead.c:170 page_cache_ra_unbounded+0x2b8/0x310 mm/readahead.c:295 do_page_cache_ra mm/readahead.c:325 [inline] page_cache_ra_order mm/readahead.c:524 [inline] page_cache_async_ra+0x40c/0x420 mm/readahead.c:674 do_async_mmap_readahead mm/filemap.c:3231 [inline] filemap_fault+0x2d1/0xb30 mm/filemap.c:3330 __do_fault+0xb6/0x200 mm/memory.c:4907 do_read_fault mm/memory.c:5322 [inline] do_fault mm/memory.c:5456 [inline] do_pte_missing mm/memory.c:3979 [inline] handle_pte_fault mm/memory.c:5801 [inline] __handle_mm_fault mm/memory.c:5944 [inline] handle_mm_fault+0xe98/0x2ac0 mm/memory.c:6112 faultin_page mm/gup.c:1196 [inline] __get_user_pages+0xf2c/0x2670 mm/gup.c:1494 populate_vma_page_range mm/gup.c:1932 [inline] __mm_populate+0x25b/0x3b0 mm/gup.c:2035 do_mlock+0x415/0x510 mm/mlock.c:653 __do_sys_mlock mm/mlock.c:661 [inline] __se_sys_mlock mm/mlock.c:659 [inline] __x64_sys_mlock+0x36/0x40 mm/mlock.c:659 x64_sys_call+0x26b2/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:150 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-write to 0xffff8881034df5e0 of 4 bytes by task 9477 on cpu 0: read_pages+0x23f/0x540 mm/readahead.c:170 page_cache_ra_unbounded+0x266/0x310 do_page_cache_ra mm/readahead.c:325 [inline] page_cache_ra_order+0xf7/0x110 mm/readahead.c:524 do_sync_mmap_readahead+0x267/0x2a0 mm/filemap.c:3203 filemap_fault+0x32f/0xb30 mm/filemap.c:3344 __do_fault+0xb6/0x200 mm/memory.c:4907 do_read_fault mm/memory.c:5322 [inline] do_fault mm/memory.c:5456 [inline] do_pte_missing mm/memory.c:3979 [inline] handle_pte_fault mm/memory.c:5801 [inline] __handle_mm_fault mm/memory.c:5944 [inline] handle_mm_fault+0xe98/0x2ac0 mm/memory.c:6112 faultin_page mm/gup.c:1196 [inline] __get_user_pages+0xf2c/0x2670 mm/gup.c:1494 populate_vma_page_range mm/gup.c:1932 [inline] __mm_populate+0x25b/0x3b0 mm/gup.c:2035 mm_populate include/linux/mm.h:3396 [inline] vm_mmap_pgoff+0x1d6/0x290 mm/util.c:585 ksys_mmap_pgoff+0x286/0x330 mm/mmap.c:542 x64_sys_call+0x1940/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:10 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: 0x0000001f -> 0x0000001c Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 9477 Comm: syz.5.1573 Tainted: G W 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ================================================================== --- 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
