CFI failure at __traceiter_kfree+0x34/0x50 include/trace/events/kmem.h:94 (target: tp_stub_func+0x0/0x10; expected type: 0x8682d211)
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 2415 Comm: syz.2.713 Not tainted 6.1.134-syzkaller-00039-g3c6d0251e1fb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__traceiter_kfree+0x34/0x50 include/trace/events/kmem.h:94
Code: 8b 3d 38 5c ca 05 4d 85 ff 74 2e 48 89 d3 49 89 f6 49 8b 07 49 8b 7f 08 4c 89 f6 48 89 da 41 ba ef 2d 7d 79 44 03 50 fc 74 02 <0f> 0b ff d0 49 83 7f 18 00 4d 8d 7f 18 75 d8 31 c0 5b 41 5e 41 5f
RSP: 0018:ffffc900000079d8 EFLAGS: 00010213
RAX: ffffffff817104f0 RBX: ffff888135754c80 RCX: 0000000000000100
RDX: ffff888135754c80 RSI: ffffffff8289af33 RDI: ffffffff870584b0
RBP: ffffc900000079f0 R08: 0000000000000004 R09: 0000000000000003
R10: 000000001ebd94fb R11: 1ffff92000000f30 R12: dead000000000122
R13: dffffc0000000000 R14: ffffffff8289af33 R15: ffff8881099c7290
FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffd88f0000 CR3: 0000000006e0f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
trace_kfree include/trace/events/kmem.h:94 [inline]
kfree+0xc9/0xf0 mm/slab_common.c:977
ref_tracker_free+0x4d3/0x7c0 lib/ref_tracker.c:153
netdev_tracker_free include/linux/netdevice.h:4104 [inline]
netdev_put include/linux/netdevice.h:4121 [inline]
fib_nh_common_release+0x4e/0x260 net/ipv4/fib_semantics.c:215
fib6_nh_release+0x208/0x220 net/ipv6/route.c:3704
fib6_info_destroy_rcu+0xc2/0x1c0 net/ipv6/ip6_fib.c:176
rcu_do_batch+0x515/0xb90 kernel/rcu/tree.c:2297
rcu_core+0x5a5/0xe70 kernel/rcu/tree.c:2557
rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2574
handle_softirqs+0x1d7/0x600 kernel/softirq.c:624
__do_softirq kernel/softirq.c:662 [inline]
invoke_softirq kernel/softirq.c:479 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:711
irq_exit_rcu+0x9/0x10 kernel/softirq.c:723
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:55 [inline]
RIP: 0010:update_stack_state+0x189/0x480 arch/x86/kernel/unwind_frame.c:228
Code: 48 8b 8d 60 ff ff ff e8 45 e0 f7 ff 85 c0 0f 85 2f 01 00 00 48 8b 85 40 ff ff ff 42 80 3c 28 00 74 08 4c 89 f7 e8 e7 39 7f 00 <4d> 8b 3e 48 8b 85 48 ff ff ff 42 80 3c 28 00 74 0c 48 8b bd 70 ff
RSP: 0018:ffffc9000dc5f0f8 EFLAGS: 00000246
RAX: 1ffff92001b8be4a RBX: ffffc9000dc5f248 RCX: 1ffff92001b8be4b
RDX: 1ffff92001b8be4c RSI: 1ffff92001b8be4a RDI: ffffc9000dc5f2a0
RBP: ffffc9000dc5f1b8 R08: ffffc9000dc5f310 R09: ffffc9000dc5f308
R10: 000000000000000d R11: 1ffff92001b8be49 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffc9000dc5f250 R15: ffffc9000dc5ff10
unwind_next_frame+0x3d5/0x700 arch/x86/kernel/unwind_frame.c:315
arch_stack_walk+0x124/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
save_stack+0xf3/0x1e0 mm/page_owner.c:147
__reset_page_owner+0x54/0x190 mm/page_owner.c:168
reset_page_owner include/linux/page_owner.h:26 [inline]
free_pages_prepare mm/page_alloc.c:1545 [inline]
free_pcp_prepare mm/page_alloc.c:1619 [inline]
free_unref_page_prepare+0x742/0x750 mm/page_alloc.c:3581
free_unref_page_list+0xba/0x7c0 mm/page_alloc.c:3729
release_pages+0xad1/0xb20 mm/swap.c:1043
free_pages_and_swap_cache+0x86/0xa0 mm/swap_state.c:315
tlb_batch_pages_flush mm/mmu_gather.c:59 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:254 [inline]
tlb_flush_mmu+0x101/0x1e0 mm/mmu_gather.c:261
zap_pte_range mm/memory.c:1547 [inline]
zap_pmd_range mm/memory.c:1596 [inline]
zap_pud_range mm/memory.c:1625 [inline]
zap_p4d_range mm/memory.c:1646 [inline]
unmap_page_range+0x20c6/0x2310 mm/memory.c:1667
unmap_single_vma mm/memory.c:1713 [inline]
unmap_vmas+0x31c/0x430 mm/memory.c:1753
exit_mmap+0x263/0xa40 mm/mmap.c:3346
__mmput+0x93/0x320 kernel/fork.c:1297
mmput+0x4b/0x150 kernel/fork.c:1320
exit_mm kernel/exit.c:568 [inline]
do_exit+0x979/0x2650 kernel/exit.c:864
do_group_exit+0x210/0x2d0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
x64_sys_call+0x7b4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe9c238e969
Code: Unable to access opcode bytes at 0x7fe9c238e93f.
RSP: 002b:00007fff2c9eb3c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe9c238e969
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fff2c9eb42c R08: 0000001d2c9eb4bf R09: 00000000000927c0
R10: 0000000000000224 R11: 0000000000000246 R12: 0000000000000085
R13: 00000000000927c0 R14: 00000000000186f7 R15: 00007fff2c9eb480
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__traceiter_kfree+0x34/0x50 include/trace/events/kmem.h:94
Code: 8b 3d 38 5c ca 05 4d 85 ff 74 2e 48 89 d3 49 89 f6 49 8b 07 49 8b 7f 08 4c 89 f6 48 89 da 41 ba ef 2d 7d 79 44 03 50 fc 74 02 <0f> 0b ff d0 49 83 7f 18 00 4d 8d 7f 18 75 d8 31 c0 5b 41 5e 41 5f
RSP: 0018:ffffc900000079d8 EFLAGS: 00010213
RAX: ffffffff817104f0 RBX: ffff888135754c80 RCX: 0000000000000100
RDX: ffff888135754c80 RSI: ffffffff8289af33 RDI: ffffffff870584b0
RBP: ffffc900000079f0 R08: 0000000000000004 R09: 0000000000000003
R10: 000000001ebd94fb R11: 1ffff92000000f30 R12: dead000000000122
R13: dffffc0000000000 R14: ffffffff8289af33 R15: ffff8881099c7290
FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffd88f0000 CR3: 0000000006e0f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
0: 48 8b 8d 60 ff ff ff mov -0xa0(%rbp),%rcx
7: e8 45 e0 f7 ff call 0xfff7e051
c: 85 c0 test %eax,%eax
e: 0f 85 2f 01 00 00 jne 0x143
14: 48 8b 85 40 ff ff ff mov -0xc0(%rbp),%rax
1b: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
20: 74 08 je 0x2a
22: 4c 89 f7 mov %r14,%rdi
25: e8 e7 39 7f 00 call 0x7f3a11
* 2a: 4d 8b 3e mov (%r14),%r15 <-- trapping instruction
2d: 48 8b 85 48 ff ff ff mov -0xb8(%rbp),%rax
34: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
39: 74 0c je 0x47
3b: 48 rex.W
3c: 8b .byte 0x8b
3d: bd .byte 0xbd
3e: 70 ff jo 0x3f