Hello, syzbot found the following issue on: HEAD commit: 4861333b4217 bonding: add ESP offload features when slaves.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=122e6ea7980000 kernel config: https://syzkaller.appspot.com/x/.config?x=ea5200d154f868aa dashboard link: https://syzkaller.appspot.com/bug?extid=dd90a702f518e0eac072 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/4263c9834cd5/disk-4861333b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/14c4f9ec4615/vmlinux-4861333b.xz kernel image: https://storage.googleapis.com/syzbot-assets/6cc8fe1b802d/bzImage-4861333b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+dd90a702f518e0eac072@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: slab-use-after-free in sk_psock_verdict_data_ready+0x6d/0x390 net/core/skmsg.c:1221 Read of size 8 at addr ffff88807595c220 by task syz.8.2987/16517 CPU: 1 UID: 0 PID: 16517 Comm: syz.8.2987 Not tainted 6.12.0-rc6-syzkaller-01230-g4861333b4217 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 sk_psock_verdict_data_ready+0x6d/0x390 net/core/skmsg.c:1221 unix_stream_sendmsg+0x7d5/0xf80 net/unix/af_unix.c:2345 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:744 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2609 ___sys_sendmsg net/socket.c:2663 [inline] __sys_sendmsg+0x292/0x380 net/socket.c:2692 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc8c817e719 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc8c9018038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fc8c8335f80 RCX: 00007fc8c817e719 RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000004 RBP: 00007fc8c81f139e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc8c8335f80 R15: 00007ffeb3aa3828 </TASK> Allocated by task 16517: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4085 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4153 sock_alloc_inode+0x28/0xc0 net/socket.c:307 alloc_inode+0x65/0x1a0 fs/inode.c:265 sock_alloc net/socket.c:633 [inline] __sock_create+0x127/0xa30 net/socket.c:1540 sock_create net/socket.c:1634 [inline] __sys_socketpair+0x2ca/0x720 net/socket.c:1781 __do_sys_socketpair net/socket.c:1834 [inline] __se_sys_socketpair net/socket.c:1831 [inline] __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1831 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 16: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2342 [inline] slab_free mm/slub.c:4579 [inline] kmem_cache_free+0x1a2/0x420 mm/slub.c:4681 rcu_do_batch kernel/rcu/tree.c:2567 [inline] rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2823 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 run_ksoftirqd+0xca/0x130 kernel/softirq.c:927 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 __call_rcu_common kernel/rcu/tree.c:3086 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3190 destroy_inode fs/inode.c:320 [inline] evict+0x83c/0x9b0 fs/inode.c:756 __dentry_kill+0x20d/0x630 fs/dcache.c:615 dput+0x19f/0x2b0 fs/dcache.c:857 __fput+0x5d2/0x880 fs/file_table.c:439 __do_sys_close fs/open.c:1567 [inline] __se_sys_close fs/open.c:1552 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1552 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88807595c200 which belongs to the cache sock_inode_cache of size 1408 The buggy address is located 32 bytes inside of freed 1408-byte region [ffff88807595c200, ffff88807595c780) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x75958 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88802edbb601 anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801eac6c80 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080150015 00000001f5000000 ffff88802edbb601 head: 00fff00000000040 ffff88801eac6c80 0000000000000000 dead000000000001 head: 0000000000000000 0000000080150015 00000001f5000000 ffff88802edbb601 head: 00fff00000000003 ffffea0001d65601 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE), pid 5853, tgid 5853 (syz-executor), ts 63362518844, free_ts 14776689664 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x303f/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x140 mm/slub.c:2412 allocate_slab+0x5a/0x2f0 mm/slub.c:2578 new_slab mm/slub.c:2631 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818 __slab_alloc+0x58/0xa0 mm/slub.c:3908 __slab_alloc_node mm/slub.c:3961 [inline] slab_alloc_node mm/slub.c:4122 [inline] kmem_cache_alloc_lru_noprof+0x1c5/0x2b0 mm/slub.c:4153 sock_alloc_inode+0x28/0xc0 net/socket.c:307 alloc_inode+0x65/0x1a0 fs/inode.c:265 sock_alloc net/socket.c:633 [inline] __sock_create+0x127/0xa30 net/socket.c:1540 sock_create net/socket.c:1634 [inline] __sys_socket_create net/socket.c:1671 [inline] __sys_socket+0x150/0x3c0 net/socket.c:1718 __do_sys_socket net/socket.c:1732 [inline] __se_sys_socket net/socket.c:1730 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1730 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 free_contig_range+0x152/0x550 mm/page_alloc.c:6748 destroy_args+0x92/0x910 mm/debug_vm_pgtable.c:1017 debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1397 do_one_initcall+0x248/0x880 init/main.c:1269 do_initcall_level+0x157/0x210 init/main.c:1331 do_initcalls+0x3f/0x80 init/main.c:1347 kernel_init_freeable+0x435/0x5d0 init/main.c:1580 kernel_init+0x1d/0x2b0 init/main.c:1469 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff88807595c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807595c180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807595c200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807595c280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807595c300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- 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
