Hello, syzbot found the following issue on: HEAD commit: 626737a5791b Merge tag 'pinctrl-v6.10-2' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1373f72e980000 kernel config: https://syzkaller.appspot.com/x/.config?x=12ff58d525e7b8f9 dashboard link: https://syzkaller.appspot.com/bug?extid=35b9a14142dd62084eb9 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b5c2e4152e89/disk-626737a5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4847a4cfa180/vmlinux-626737a5.xz kernel image: https://storage.googleapis.com/syzbot-assets/18f05d5ddcb1/bzImage-626737a5.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+35b9a14142dd62084eb9@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in receive_mergeable drivers/net/virtio_net.c:1847 [inline] BUG: KMSAN: uninit-value in receive_buf+0x2620/0x6070 drivers/net/virtio_net.c:1973 virtnet_receive drivers/net/virtio_net.c:2277 [inline] virtnet_poll+0xd1c/0x23c0 drivers/net/virtio_net.c:2380 __napi_poll+0xe7/0x980 net/core/dev.c:6722 handle_softirqs+0x1ce/0x800 kernel/softirq.c:554 common_interrupt+0x94/0xa0 arch/x86/kernel/irq.c:278 asm_common_interrupt+0x2b/0x40 arch/x86/include/asm/idtentry.h:693 kmsan_get_metadata+0x189/0x1d0 kmsan_get_shadow_origin_ptr+0x4d/0xb0 mm/kmsan/shadow.c:102 get_shadow_origin_ptr mm/kmsan/instrumentation.c:36 [inline] __msan_metadata_ptr_for_load_8+0x24/0x40 mm/kmsan/instrumentation.c:92 unwind_get_return_address_ptr+0x6a/0x100 arch/x86/kernel/unwind_frame.c:28 update_stack_state+0x206/0x270 arch/x86/kernel/unwind_frame.c:251 unwind_next_frame+0x19a/0x470 arch/x86/kernel/unwind_frame.c:315 arch_stack_walk+0x1ec/0x2d0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xaa/0xe0 kernel/stacktrace.c:122 kmsan_save_stack_with_flags mm/kmsan/core.c:74 [inline] kmsan_internal_poison_memory+0x49/0x90 mm/kmsan/core.c:58 kmsan_slab_alloc+0xdf/0x160 mm/kmsan/hooks.c:68 slab_post_alloc_hook mm/slub.c:3947 [inline] slab_alloc_node mm/slub.c:4001 [inline] __do_kmalloc_node mm/slub.c:4121 [inline] __kmalloc_noprof+0x660/0xf30 mm/slub.c:4135 kmalloc_noprof include/linux/slab.h:664 [inline] tomoyo_realpath_from_path+0x104/0xaa0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x1ef/0xc50 security/tomoyo/file.c:771 tomoyo_file_open+0x271/0x360 security/tomoyo/tomoyo.c:334 security_file_open+0x9a/0xc60 security/security.c:2962 do_dentry_open+0x5b1/0x22b0 fs/open.c:942 vfs_open+0x49/0x60 fs/open.c:1089 do_open fs/namei.c:3650 [inline] path_openat+0x4ab0/0x5b70 fs/namei.c:3807 do_filp_open+0x20e/0x590 fs/namei.c:3834 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1405 do_sys_open fs/open.c:1420 [inline] __do_sys_openat fs/open.c:1436 [inline] __se_sys_openat fs/open.c:1431 [inline] __x64_sys_openat+0x2a1/0x310 fs/open.c:1431 x64_sys_call+0x128b/0x3b90 arch/x86/include/generated/asm/syscalls_64.h:258 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_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4701 alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265 alloc_pages_noprof+0x1bf/0x1e0 mm/mempolicy.c:2336 skb_page_frag_refill+0x2bf/0x7c0 net/core/sock.c:2920 virtnet_rq_alloc+0x43/0xbb0 drivers/net/virtio_net.c:882 add_recvbuf_mergeable drivers/net/virtio_net.c:2128 [inline] try_fill_recv+0x3f0/0x2f50 drivers/net/virtio_net.c:2173 virtnet_open+0x1cc/0xb00 drivers/net/virtio_net.c:2452 __dev_open+0x546/0x6f0 net/core/dev.c:1472 __dev_change_flags+0x309/0x9a0 net/core/dev.c:8781 dev_change_flags+0x8e/0x1d0 net/core/dev.c:8853 devinet_ioctl+0x13ec/0x22c0 net/ipv4/devinet.c:1177 inet_ioctl+0x4bd/0x6d0 net/ipv4/af_inet.c:1003 sock_do_ioctl+0xb7/0x540 net/socket.c:1222 sock_ioctl+0x727/0xd70 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0x261/0x450 fs/ioctl.c:893 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:893 x64_sys_call+0x18c0/0x3b90 arch/x86/include/generated/asm/syscalls_64.h:17 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 PID: 4794 Comm: rm Not tainted 6.10.0-rc5-syzkaller-00012-g626737a5791b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 ===================================================== --- 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
