==================================================================
BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x471/0x4b0 net/rose/rose_timer.c:183
Read of size 2 at addr ffff88805694682a by task modprobe/12359
CPU: 0 UID: 0 PID: 12359 Comm: modprobe Not tainted 6.16.0-rc3-syzkaller-00144-gbd475eeaaf3c #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xd2/0x2b0 mm/kasan/report.c:521
kasan_report+0x118/0x150 mm/kasan/report.c:634
rose_timer_expiry+0x471/0x4b0 net/rose/rose_timer.c:183
call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747
expire_timers kernel/time/timer.c:1798 [inline]
__run_timers kernel/time/timer.c:2372 [inline]
__run_timer_base+0x61a/0x860 kernel/time/timer.c:2384
run_timer_base kernel/time/timer.c:2393 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
handle_softirqs+0x286/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:mas_validate_limits lib/maple_tree.c:7491 [inline]
RIP: 0010:mt_validate+0xc4f/0x4380 lib/maple_tree.c:7594
Code: f6 4c 8b b4 24 30 01 00 00 4c 89 ef 4c 89 f6 e8 17 de 60 f6 4d 39 f5 0f 82 e8 01 00 00 e8 a9 db 60 f6 4c 8b b4 24 38 01 00 00 <4c> 89 ef 4c 89 f6 e8 f6 dd 60 f6 4d 39 f5 0f 87 43 02 00 00 e8 88
RSP: 0018:ffffc90003f9f120 EFLAGS: 00000293
RAX: ffffffff8b5f72c7 RBX: 0000000000000007 RCX: ffff88807b738000
RDX: 0000000000000000 RSI: 00007fe10446b000 RDI: 00007fe104482fff
RBP: ffffc90003f9f2f0 R08: ffff88807b738000 R09: 0000000000000004
R10: 0000000000000003 R11: 0000000000000000 R12: ffff8880288fb240
R13: 00007fe104482fff R14: 00007fe104674fff R15: 0000000000000001
validate_mm+0xb6/0x4b0 mm/vma.c:648
__split_vma+0x8bd/0xa00 mm/vma.c:566
vms_gather_munmap_vmas+0x4ab/0x12b0 mm/vma.c:1375
__mmap_prepare mm/vma.c:2351 [inline]
__mmap_region mm/vma.c:2607 [inline]
mmap_region+0x678/0x1f30 mm/vma.c:2692
do_mmap+0xc45/0x10d0 mm/mmap.c:561
vm_mmap_pgoff+0x31b/0x4c0 mm/util.c:579
ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:607
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe104753242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007ffee4e80c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fe1043f8000 RCX: 00007fe104753242
RDX: 0000000000000001 RSI: 0000000000026000 RDI: 00007fe1043f8000
RBP: 0000000000000812 R08: 0000000000000000 R09: 000000000003a000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffee4e80c90
R13: 00007fe10442a6b0 R14: 00007ffee4e81040 R15: 00000fffdc9d0184
Allocated by task 49:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__kmalloc_cache_noprof+0x230/0x3d0 mm/slub.c:4359
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
mca_alloc net/ipv6/mcast.c:884 [inline]
__ipv6_dev_mc_inc+0x420/0xaf0 net/ipv6/mcast.c:975
addrconf_join_solict net/ipv6/addrconf.c:2242 [inline]
addrconf_dad_begin net/ipv6/addrconf.c:4103 [inline]
addrconf_dad_work+0x3d0/0x14b0 net/ipv6/addrconf.c:4231
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Freed by task 49:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free_freelist_hook mm/slub.c:2410 [inline]
slab_free_bulk mm/slub.c:4667 [inline]
kmem_cache_free_bulk+0x2d1/0x520 mm/slub.c:5246
kfree_bulk include/linux/slab.h:794 [inline]
kvfree_rcu_bulk+0xe5/0x1f0 mm/slab_common.c:1516
kvfree_rcu_drain_ready mm/slab_common.c:1699 [inline]
kfree_rcu_monitor+0x211/0x2a0 mm/slab_common.c:1772
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548
kvfree_call_rcu+0xbb/0x410 mm/slab_common.c:1962
__ipv6_dev_mc_dec+0x31f/0x390 net/ipv6/mcast.c:1024
addrconf_leave_solict net/ipv6/addrconf.c:2254 [inline]
__ipv6_ifa_notify+0x43d/0xac0 net/ipv6/addrconf.c:6302
addrconf_ifdown+0xe69/0x1880 net/ipv6/addrconf.c:3981
addrconf_notify+0x1bc/0x1010 net/ipv6/addrconf.c:-1
notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
dev_close_many+0x29c/0x410 net/core/dev.c:1785
unregister_netdevice_many_notify+0x834/0x2320 net/core/dev.c:12047
unregister_netdevice_many net/core/dev.c:12140 [inline]
default_device_exit_batch+0x819/0x890 net/core/dev.c:12644
ops_exit_list net/core/net_namespace.c:206 [inline]
ops_undo_list+0x525/0x990 net/core/net_namespace.c:253
cleanup_net+0x4c5/0x800 net/core/net_namespace.c:686
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff888056946800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
freed 512-byte region [ffff888056946800, ffff888056946a00)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888056946800 pfn:0x56944
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801a441c80 ffffea0001575e10 ffffea00015a4410
raw: ffff888056946800 000000000010000b 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801a441c80 ffffea0001575e10 ffffea00015a4410
head: ffff888056946800 000000000010000b 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea00015a5101 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5920, tgid 5920 (kworker/u8:4), ts 76606912393, free_ts 21619856865
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2451 [inline]
allocate_slab+0x8a/0x3b0 mm/slub.c:2619
new_slab mm/slub.c:2673 [inline]
___slab_alloc+0xbfc/0x1480 mm/slub.c:3859
__slab_alloc mm/slub.c:3949 [inline]
__slab_alloc_node mm/slub.c:4024 [inline]
slab_alloc_node mm/slub.c:4185 [inline]
__kmalloc_cache_noprof+0x296/0x3d0 mm/slub.c:4354
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
alloc_bprm+0x7d/0x5b0 fs/exec.c:1409
kernel_execve+0x9b/0x9f0 fs/exec.c:1880
call_usermodehelper_exec_async+0x210/0x360 kernel/umh.c:109
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
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:1248 [inline]
__free_frozen_pages+0xc71/0xe70 mm/page_alloc.c:2706
__free_pages mm/page_alloc.c:5071 [inline]
free_contig_range+0x1bd/0x4a0 mm/page_alloc.c:6927
destroy_args+0x7e/0x5d0 mm/debug_vm_pgtable.c:1009
debug_vm_pgtable+0x412/0x450 mm/debug_vm_pgtable.c:1389
do_one_initcall+0x233/0x820 init/main.c:1274
do_initcall_level+0x137/0x1f0 init/main.c:1336
do_initcalls+0x69/0xd0 init/main.c:1352
kernel_init_freeable+0x3d9/0x570 init/main.c:1584
kernel_init+0x1d/0x1d0 init/main.c:1474
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888056946700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888056946780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888056946800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888056946880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888056946900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: f6 4c 8b b4 24 testb $0x24,-0x4c(%rbx,%rcx,4)
5: 30 01 xor %al,(%rcx)
7: 00 00 add %al,(%rax)
9: 4c 89 ef mov %r13,%rdi
c: 4c 89 f6 mov %r14,%rsi
f: e8 17 de 60 f6 call 0xf660de2b
14: 4d 39 f5 cmp %r14,%r13
17: 0f 82 e8 01 00 00 jb 0x205
1d: e8 a9 db 60 f6 call 0xf660dbcb
22: 4c 8b b4 24 38 01 00 mov 0x138(%rsp),%r14
29: 00
* 2a: 4c 89 ef mov %r13,%rdi <-- trapping instruction
2d: 4c 89 f6 mov %r14,%rsi
30: e8 f6 dd 60 f6 call 0xf660de2b
35: 4d 39 f5 cmp %r14,%r13
38: 0f 87 43 02 00 00 ja 0x281
3e: e8 .byte 0xe8
3f: 88 .byte 0x88