Hello, syzbot found the following issue on: HEAD commit: 5c8c229261f1 Merge tag 'kthreads-fixes-2025-02-04' of git:.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=13a8beb0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f20bce78db15972a dashboard link: https://syzkaller.appspot.com/bug?extid=812641c6c3d7586a1613 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12042df8580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17ff93df980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/63aa4d99d73d/disk-5c8c2292.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/104150a76e91/vmlinux-5c8c2292.xz kernel image: https://storage.googleapis.com/syzbot-assets/c4622f8c58f4/bzImage-5c8c2292.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/24fb8c942e20/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+812641c6c3d7586a1613@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 1764 to 1763 ===================================================== BUG: KMSAN: uninit-value in do_isofs_readdir fs/isofs/dir.c:150 [inline] BUG: KMSAN: uninit-value in isofs_readdir+0xa33/0x2610 fs/isofs/dir.c:262 do_isofs_readdir fs/isofs/dir.c:150 [inline] isofs_readdir+0xa33/0x2610 fs/isofs/dir.c:262 iterate_dir+0x740/0x930 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:403 [inline] __se_sys_getdents64+0x170/0x540 fs/readdir.c:389 __x64_sys_getdents64+0x96/0xe0 fs/readdir.c:389 x64_sys_call+0x3b0f/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:218 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: __alloc_frozen_pages_noprof+0x9a7/0xe00 mm/page_alloc.c:4762 alloc_pages_mpol+0x4cd/0x890 mm/mempolicy.c:2270 alloc_frozen_pages_noprof mm/mempolicy.c:2341 [inline] alloc_pages_noprof+0x1b5/0x250 mm/mempolicy.c:2361 get_free_pages_noprof+0x34/0xc0 mm/page_alloc.c:4798 isofs_readdir+0x74/0x2610 fs/isofs/dir.c:256 iterate_dir+0x740/0x930 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:403 [inline] __se_sys_getdents64+0x170/0x540 fs/readdir.c:389 __x64_sys_getdents64+0x96/0xe0 fs/readdir.c:389 x64_sys_call+0x3b0f/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:218 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 5784 Comm: syz-executor207 Not tainted 6.14.0-rc1-syzkaller-00028-g5c8c229261f1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 ===================================================== --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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
