================================================================== BUG: KASAN: slab-use-after-free in __bpf_trace_run kernel/trace/bpf_trace.c:2304 [inline] BUG: KASAN: slab-use-after-free in bpf_trace_run2+0xfa/0x540 kernel/trace/bpf_trace.c:2359 Read of size 8 at addr ffff88802f093c18 by task udevd/4689 CPU: 0 UID: 0 PID: 4689 Comm: udevd Not tainted 6.12.0-rc3-next-20241016-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __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 __bpf_trace_run kernel/trace/bpf_trace.c:2304 [inline] bpf_trace_run2+0xfa/0x540 kernel/trace/bpf_trace.c:2359 __bpf_trace_sys_exit+0x38/0x60 include/trace/events/syscalls.h:44 trace_sys_exit include/trace/events/syscalls.h:44 [inline] syscall_exit_work+0x1af/0x210 kernel/entry/common.c:169 syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline] syscall_exit_to_user_mode+0x279/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fac423170a8 Code: 48 8b 05 83 9d 0d 00 64 c7 00 16 00 00 00 83 c8 ff 48 83 c4 20 5b c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 5b 48 8b 15 51 9d 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007fffb5988028 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007fac426eeae0 RCX: 00007fac423170a8 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000c RBP: 000000000000000c R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: ffffffffffffffff R14: 00000000ffffffff R15: 00000000ffffffff Allocated by task 8148: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_noprof+0x243/0x390 mm/slub.c:4304 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] bpf_raw_tp_link_attach+0x2a0/0x6e0 kernel/bpf/syscall.c:3829 bpf_raw_tracepoint_open+0x177/0x1f0 kernel/bpf/syscall.c:3876 __sys_bpf+0x3c0/0x810 kernel/bpf/syscall.c:5691 __do_sys_bpf kernel/bpf/syscall.c:5756 [inline] __se_sys_bpf kernel/bpf/syscall.c:5754 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5754 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 0: 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:582 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:233 [inline] slab_free_hook mm/slub.c:2329 [inline] slab_free mm/slub.c:4588 [inline] kfree+0x1a0/0x460 mm/slub.c:4736 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 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline] sysvec_call_function_single+0xa3/0xc0 arch/x86/kernel/smp.c:266 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709 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:544 __call_rcu_common kernel/rcu/tree.c:3086 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3190 bpf_link_put_direct kernel/bpf/syscall.c:3045 [inline] bpf_link_release+0x78/0x90 kernel/bpf/syscall.c:3052 __fput+0x23c/0xa50 fs/file_table.c:434 task_work_run+0x24f/0x310 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88802f093c00 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 24 bytes inside of freed 128-byte region [ffff88802f093c00, ffff88802f093c80) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2f093 ksm flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801ac41a00 ffffea0001ed9700 dead000000000003 raw: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5233, tgid 5233 (syz-executor), ts 65685942405, free_ts 65289020823 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+0x3123/0x3270 mm/page_alloc.c:3493 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4769 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2399 allocate_slab+0x5a/0x2f0 mm/slub.c:2565 new_slab mm/slub.c:2618 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3805 __slab_alloc+0x58/0xa0 mm/slub.c:3895 __slab_alloc_node mm/slub.c:3970 [inline] slab_alloc_node mm/slub.c:4131 [inline] __kmalloc_cache_noprof+0x27b/0x390 mm/slub.c:4299 kmalloc_noprof include/linux/slab.h:901 [inline] __hw_addr_create net/core/dev_addr_lists.c:60 [inline] __hw_addr_add_ex+0x1a8/0x610 net/core/dev_addr_lists.c:118 __dev_mc_add net/core/dev_addr_lists.c:867 [inline] dev_mc_add+0xa3/0x110 net/core/dev_addr_lists.c:885 igmp6_group_added+0x1a4/0x710 net/ipv6/mcast.c:681 __ipv6_dev_mc_inc+0x8bf/0xaa0 net/ipv6/mcast.c:950 ipv6_add_dev+0xe12/0x1220 net/ipv6/addrconf.c:471 addrconf_notify+0x6a7/0x1020 net/ipv6/addrconf.c:3655 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:85 page last free pid 5231 tgid 5231 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:2674 discard_slab mm/slub.c:2664 [inline] __put_partials+0xeb/0x130 mm/slub.c:3132 put_cpu_partial+0x17c/0x250 mm/slub.c:3207 __slab_free+0x2ea/0x3d0 mm/slub.c:4458 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4094 [inline] slab_alloc_node mm/slub.c:4143 [inline] __kmalloc_cache_noprof+0x1d9/0x390 mm/slub.c:4299 kmalloc_noprof include/linux/slab.h:901 [inline] __netdev_adjacent_dev_insert+0x157/0x8d0 net/core/dev.c:7821 __netdev_adjacent_dev_link_lists net/core/dev.c:7913 [inline] __netdev_adjacent_dev_link_neighbour net/core/dev.c:7942 [inline] __netdev_upper_dev_link+0x404/0x670 net/core/dev.c:8002 netdev_master_upper_dev_link+0xb1/0x100 net/core/dev.c:8077 bond_master_upper_dev_link+0x299/0x430 drivers/net/bonding/bond_main.c:1769 bond_enslave+0x1e62/0x3ab0 drivers/net/bonding/bond_main.c:2294 do_set_master net/core/rtnetlink.c:2804 [inline] do_setlink+0xe73/0x41f0 net/core/rtnetlink.c:3010 __rtnl_newlink net/core/rtnetlink.c:3799 [inline] rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3846 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6749 Memory state around the buggy address: ffff88802f093b00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802f093b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88802f093c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802f093c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802f093d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================