------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: timer_list hint: rose_transmit_restart_request net/rose/rose_link.c:-1 [inline]
ODEBUG: free active (active state 0) object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:284
WARNING: CPU: 1 PID: 19402 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 1 PID: 19402 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
WARNING: CPU: 1 PID: 19402 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Modules linked in:
CPU: 1 PID: 19402 Comm: syz.3.2973 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
RIP: 0010:debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Code: ef e8 98 a4 bd fd 4c 8b 45 00 48 c7 c7 00 1d df 8a 48 c7 c6 c0 19 df 8a 48 c7 c2 60 1e df 8a 8b 0c 24 4d 89 e9 e8 14 08 38 fd <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 d5 4b 0a
RSP: 0018:ffffc900001e0a10 EFLAGS: 00010246
RAX: 88cbe528f5f08c00 RBX: ffffffff96e3a270 RCX: ffff8880585cd940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8a8deea0 R08: ffffc900001e0687 R09: 1ffff9200003c0d0
R10: dffffc0000000000 R11: fffff5200003c0d1 R12: ffff8880592d8a00
R13: ffffffff892b80d0 R14: ffff8880592d8000 R15: ffff8880592d8890
FS: 00007f48ba8766c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2f22c6 CR3: 000000005b42b000 CR4: 00000000003506e0
Call Trace:
slab_free_hook mm/slub.c:1704 [inline]
slab_free_freelist_hook+0xd2/0x1a0 mm/slub.c:1755
slab_free mm/slub.c:3687 [inline]
__kmem_cache_free+0xb6/0x1f0 mm/slub.c:3700
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4a7/0x5d0 net/rose/rose_timer.c:183
call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:58 [inline]
RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:347 [inline]
RIP: 0010:deref_stack_reg+0xad/0x230 arch/x86/kernel/unwind_orc.c:357
Code: 74 24 08 4d 8b 77 10 4c 89 fd 48 c1 ed 03 0f b6 44 35 00 84 c0 0f 85 37 01 00 00 41 83 3f 00 0f 95 c0 4c 39 c3 0f 96 c1 20 c1 <4d> 39 c6 0f 97 c0 20 c8 3c 01 75 18 49 8d 40 08 48 39 d8 0f 97 c1
RSP: 0018:ffffc900032a6d58 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc900032a0000 RCX: 0000000000000001
RDX: ffffc900032a6ec8 RSI: dffffc0000000000 RDI: ffffc900032a6e88
RBP: 1ffff92000654dd1 R08: ffffc900032a73d8 R09: ffffc900032a6ed8
R10: dffffc0000000000 R11: fffff52000654ddd R12: 1ffff92000654dd2
R13: 1ffff92000654dd3 R14: ffffc900032a8000 R15: ffffc900032a6e88
unwind_next_frame+0x1758/0x20b0 arch/x86/kernel/unwind_orc.c:-1
arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
save_stack+0x121/0x230 mm/page_owner.c:127
__set_page_owner+0x19/0x60 mm/page_owner.c:190
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2559
prep_new_page mm/page_alloc.c:2566 [inline]
get_page_from_freelist+0x1a1e/0x1ab0 mm/page_alloc.c:4357
__alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5657
__folio_alloc+0xe/0x30 mm/page_alloc.c:5689
vma_alloc_folio+0x4a3/0x900 mm/mempolicy.c:2243
shmem_alloc_folio mm/shmem.c:1589 [inline]
shmem_alloc_and_acct_folio+0x463/0xbc0 mm/shmem.c:1613
shmem_get_folio_gfp+0x1361/0x3400 mm/shmem.c:1941
shmem_fault+0x1b6/0x780 mm/shmem.c:2156
__do_fault+0x13b/0x4e0 mm/memory.c:4278
do_read_fault mm/memory.c:4629 [inline]
do_fault mm/memory.c:4758 [inline]
handle_pte_fault mm/memory.c:5029 [inline]
__handle_mm_fault mm/memory.c:5171 [inline]
handle_mm_fault+0x2407/0x3ee0 mm/memory.c:5292
faultin_page mm/gup.c:1026 [inline]
__get_user_pages+0x40d/0xec0 mm/gup.c:1250
populate_vma_page_range+0x214/0x2b0 mm/gup.c:1607
__mm_populate+0x25c/0x380 mm/gup.c:1721
mm_populate include/linux/mm.h:2891 [inline]
vm_mmap_pgoff+0x212/0x2d0 mm/util.c:525
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f48b999c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f48ba876028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f48b9c15fa0 RCX: 00007f48b999c819
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f48b9a32c91 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f48b9c16038 R14: 00007f48b9c15fa0 R15: 00007ffdde811a78
----------------
Code disassembly (best guess):
0: 74 24 je 0x26
2: 08 4d 8b or %cl,-0x75(%rbp)
5: 77 10 ja 0x17
7: 4c 89 fd mov %r15,%rbp
a: 48 c1 ed 03 shr $0x3,%rbp
e: 0f b6 44 35 00 movzbl 0x0(%rbp,%rsi,1),%eax
13: 84 c0 test %al,%al
15: 0f 85 37 01 00 00 jne 0x152
1b: 41 83 3f 00 cmpl $0x0,(%r15)
1f: 0f 95 c0 setne %al
22: 4c 39 c3 cmp %r8,%rbx
25: 0f 96 c1 setbe %cl
28: 20 c1 and %al,%cl
* 2a: 4d 39 c6 cmp %r8,%r14 <-- trapping instruction
2d: 0f 97 c0 seta %al
30: 20 c8 and %cl,%al
32: 3c 01 cmp $0x1,%al
34: 75 18 jne 0x4e
36: 49 8d 40 08 lea 0x8(%r8),%rax
3a: 48 39 d8 cmp %rbx,%rax
3d: 0f 97 c1 seta %cl