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ODEBUG: free active (active state 0) object: ffff88805748b490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2927
WARNING: lib/debugobjects.c:612 at debug_print_object+0x18e/0x2a0 lib/debugobjects.c:612, CPU#1: syz.0.2562/13666
Modules linked in:
CPU: 1 UID: 0 PID: 13666 Comm: syz.0.2562 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:debug_print_object+0x19b/0x2a0 lib/debugobjects.c:612
Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4f 48 8d 3d 22 08 d2 0b 41 56 48 8b 14 dd e0 47 fa 8b 4c 89 e6 <67> 48 0f b9 3a 58 83 05 bc ef c7 0b 01 48 83 c4 18 5b 5d 41 5c 41
RSP: 0018:ffffc90000a08a18 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: ffffffff8bfa4720 RSI: ffffffff8bfa4340 RDI: ffffffff90c19530
RBP: 0000000000000001 R08: ffff88805748b490 R09: ffffffff8b92b880
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8bfa4340
R13: ffffffff8b92b8c0 R14: ffffffff8a663210 R15: ffffc90000a08b18
FS: 00007f57f35186c0(0000) GS:ffff8881246d9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2c7d27 CR3: 00000000588cf000 CR4: 00000000003526f0
DR0: 0000000000000003 DR1: 00000000000001f8 DR2: 000000000000008e
DR3: 000000000000057a DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
debug_check_no_obj_freed+0x4da/0x630 lib/debugobjects.c:1129
slab_free_hook mm/slub.c:2471 [inline]
slab_free mm/slub.c:6674 [inline]
kfree+0x34c/0x690 mm/slub.c:6882
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x53f/0x630 net/rose/rose_timer.c:183
call_timer_fn+0x19a/0x590 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x757/0xac0 kernel/time/timer.c:2373
__run_timer_base kernel/time/timer.c:2385 [inline]
__run_timer_base kernel/time/timer.c:2377 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2394
run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2404
handle_softirqs+0x1ea/0x910 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xef/0x150 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__page_table_check_zero+0x23e/0x410 mm/page_table_check.c:139
Code: 48 8b 04 24 48 85 c0 74 46 e8 ee f5 88 ff 48 8b 44 24 18 42 80 3c 30 00 0f 85 b9 01 00 00 4c 03 25 d7 08 79 18 e8 d2 f5 88 ff <48> 83 c5 01 4d 85 e4 0f 84 bc 00 00 00 e8 c0 f5 88 ff 8b 74 24 0c
RSP: 0018:ffffc90003b4f000 EFLAGS: 00000246
RAX: 0000000000080000 RBX: 000000000003b60e RCX: ffffc90004aa2000
RDX: 0000000000080000 RSI: ffffffff827e05ce RDI: ffff8880347d24c0
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 000000000000360e R11: 0000000000000000 R12: ffff88801d50e460
R13: 0000000000000001 R14: dffffc0000000000 R15: ffff88801d50e45c
page_table_check_alloc include/linux/page_table_check.h:35 [inline]
post_alloc_hook+0x1cd/0x250 mm/page_alloc.c:1885
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0xe3d/0x2e10 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x26c/0x2410 mm/page_alloc.c:5240
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2486
folio_alloc_mpol_noprof+0x36/0x340 mm/mempolicy.c:2505
shmem_alloc_folio+0x135/0x160 mm/shmem.c:1913
shmem_alloc_and_add_folio+0x371/0xd40 mm/shmem.c:1955
shmem_get_folio_gfp+0x6ab/0x1900 mm/shmem.c:2579
shmem_fault+0x1f9/0xa20 mm/shmem.c:2780
__do_fault+0x10d/0x550 mm/memory.c:5323
do_read_fault mm/memory.c:5758 [inline]
do_fault+0xaf9/0x1990 mm/memory.c:5892
do_pte_missing mm/memory.c:4404 [inline]
handle_pte_fault mm/memory.c:6276 [inline]
__handle_mm_fault+0x1807/0x2b50 mm/memory.c:6414
handle_mm_fault+0x36d/0xa20 mm/memory.c:6583
faultin_page mm/gup.c:1126 [inline]
__get_user_pages+0xf9c/0x34d0 mm/gup.c:1428
populate_vma_page_range+0x267/0x3f0 mm/gup.c:1860
__mm_populate+0x107/0x3a0 mm/gup.c:1963
mm_populate include/linux/mm.h:3705 [inline]
vm_mmap_pgoff+0x37f/0x470 mm/util.c:586
ksys_mmap_pgoff+0x7d/0x5b0 mm/mmap.c:604
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
__x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f57f259aeb9
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:00007f57f3518028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f57f2815fa0 RCX: 00007f57f259aeb9
RDX: b635773f06ebbeef RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f57f2608c1f R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f57f2816038 R14: 00007f57f2815fa0 R15: 00007ffea9c007a8
----------------
Code disassembly (best guess):
0: b8 00 00 00 00 mov $0x0,%eax
5: 00 fc add %bh,%ah
7: ff lcall (bad)
8: df 48 89 fisttps -0x77(%rax)
b: fa cli
c: 48 c1 ea 03 shr $0x3,%rdx
10: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
14: 75 4f jne 0x65
16: 48 8d 3d 22 08 d2 0b lea 0xbd20822(%rip),%rdi # 0xbd2083f
1d: 41 56 push %r14
1f: 48 8b 14 dd e0 47 fa mov -0x7405b820(,%rbx,8),%rdx
26: 8b
27: 4c 89 e6 mov %r12,%rsi
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 58 pop %rax
30: 83 05 bc ef c7 0b 01 addl $0x1,0xbc7efbc(%rip) # 0xbc7eff3
37: 48 83 c4 18 add $0x18,%rsp
3b: 5b pop %rbx
3c: 5d pop %rbp
3d: 41 5c pop %r12
3f: 41 rex.B