Hello, syzbot found the following issue on: HEAD commit: 0dd3ee311255 Linux 6.7 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=169326ade80000 kernel config: https://syzkaller.appspot.com/x/.config?x=373206b1ae2fe3d4 dashboard link: https://syzkaller.appspot.com/bug?extid=3266db0c26d1fbbe3abb 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/983c6822f4f0/disk-0dd3ee31.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f7ac98ec5a78/vmlinux-0dd3ee31.xz kernel image: https://storage.googleapis.com/syzbot-assets/f568a85da78f/bzImage-0dd3ee31.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3266db0c26d1fbbe3abb@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in af_alg_free_sg+0x1a7/0x270 crypto/af_alg.c:547 af_alg_free_sg+0x1a7/0x270 crypto/af_alg.c:547 hash_sendmsg+0x1938/0x1c30 crypto/algif_hash.c:172 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2586 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2640 __sys_sendmmsg+0x3c4/0x950 net/socket.c:2726 __do_sys_sendmmsg net/socket.c:2755 [inline] __se_sys_sendmmsg net/socket.c:2752 [inline] __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2752 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0x121/0x3c0 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] sock_kmalloc+0x128/0x1c0 net/core/sock.c:2688 hash_accept_parent_nokey crypto/algif_hash.c:418 [inline] hash_accept_parent+0xbf/0x430 crypto/algif_hash.c:445 af_alg_accept+0x1fc/0x810 crypto/af_alg.c:439 hash_accept+0x340/0x790 crypto/algif_hash.c:254 do_accept+0x606/0xa80 net/socket.c:1929 __sys_accept4_file net/socket.c:1969 [inline] __sys_accept4+0x18e/0x360 net/socket.c:1999 __do_sys_accept4 net/socket.c:2010 [inline] __se_sys_accept4 net/socket.c:2007 [inline] __x64_sys_accept4+0xb8/0x120 net/socket.c:2007 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b CPU: 1 PID: 6735 Comm: syz-executor.4 Not tainted 6.7.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ===================================================== --- 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
