==================================================================
BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x464/0x4a0 net/rose/rose_timer.c:183
Read of size 2 at addr ffff888021bc1c2a by task syz-executor/12501
CPU: 0 UID: 0 PID: 12501 Comm: syz-executor Not tainted 6.14.0-rc2-syzkaller-00158-g071ed42cff4f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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:378 [inline]
print_report+0x169/0x550 mm/kasan/report.c:489
kasan_report+0x143/0x180 mm/kasan/report.c:602
rose_timer_expiry+0x464/0x4a0 net/rose/rose_timer.c:183
call_timer_fn+0x187/0x650 kernel/time/timer.c:1789
expire_timers kernel/time/timer.c:1840 [inline]
__run_timers kernel/time/timer.c:2414 [inline]
__run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2426
run_timer_base kernel/time/timer.c:2435 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2445
handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_flush_all+0x996/0xeb0
Code: 48 21 c3 0f 85 16 02 00 00 e8 56 eb 20 00 4c 8b 7c 24 10 4d 85 f6 75 07 e8 47 eb 20 00 eb 06 e8 40 eb 20 00 fb 48 8b 5c 24 18 <48> 8b 44 24 30 42 80 3c 28 00 74 08 48 89 df e8 76 28 88 00 4c 8b
RSP: 0018:ffffc90003ba6900 EFLAGS: 00000293
RAX: ffffffff81a0cc20 RBX: ffffffff8f38bbf8 RCX: ffff888031473c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003ba6ab0 R08: ffffffff81a0cbf7 R09: 1ffffffff28a8908
R10: dffffc0000000000 R11: fffffbfff28a8909 R12: ffffffff8f38bba0
R13: dffffc0000000000 R14: 0000000000000200 R15: ffffc90003ba6b00
__console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3309
vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2432
_printk+0xd5/0x120 kernel/printk/printk.c:2457
batadv_hardif_enable_interface+0x7d0/0x9f0 net/batman-adv/hard-interface.c:756
batadv_softif_slave_add+0x79/0x100 net/batman-adv/soft-interface.c:858
do_set_master net/core/rtnetlink.c:2926 [inline]
do_setlink+0xe7f/0x4300 net/core/rtnetlink.c:3125
rtnl_changelink net/core/rtnetlink.c:3733 [inline]
__rtnl_newlink net/core/rtnetlink.c:3885 [inline]
rtnl_newlink+0x1704/0x1d30 net/core/rtnetlink.c:4022
rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6912
netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2543
netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:733
__sys_sendto+0x363/0x4c0 net/socket.c:2187
__do_sys_sendto net/socket.c:2194 [inline]
__se_sys_sendto net/socket.c:2190 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2190
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
RIP: 0033:0x7fa82178ec7c
Code: 2a 5f 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5f 02 00 48 8b
RSP: 002b:00007ffd89cff980 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fa8224d4620 RCX: 00007fa82178ec7c
RDX: 0000000000000028 RSI: 00007fa8224d4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd89cff9d4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fa8224d4670 R15: 0000000000000000
Allocated by task 12247:
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]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_noprof+0x285/0x4c0 mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
fib6_info_alloc+0x2e/0xf0 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x445/0x12b0 net/ipv6/route.c:3766
ip6_route_add+0x28/0x160 net/ipv6/route.c:3858
addrconf_add_mroute net/ipv6/addrconf.c:2549 [inline]
addrconf_add_dev+0x35b/0x540 net/ipv6/addrconf.c:2567
inet6_addr_add+0x1ee/0xe30 net/ipv6/addrconf.c:3029
inet6_rtm_newaddr+0xa89/0xf10 net/ipv6/addrconf.c:5054
rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6912
netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2543
netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:733
__sys_sendto+0x363/0x4c0 net/socket.c:2187
__do_sys_sendto net/socket.c:2194 [inline]
__se_sys_sendto net/socket.c:2190 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2190
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 16:
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:576
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:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kfree+0x196/0x430 mm/slub.c:4757
rcu_do_batch kernel/rcu/tree.c:2546 [inline]
rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2802
handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
run_ksoftirqd+0xca/0x130 kernel/softirq.c:950
smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xaa/0xc0 mm/kasan/generic.c:548
__call_rcu_common kernel/rcu/tree.c:3065 [inline]
call_rcu+0x168/0xac0 kernel/rcu/tree.c:3172
call_rcu_hurry include/linux/rcupdate.h:115 [inline]
fib6_info_release include/net/ip6_fib.h:343 [inline]
ip6_route_info_create+0xa33/0x12b0 net/ipv6/route.c:3844
ip6_route_add+0x28/0x160 net/ipv6/route.c:3858
addrconf_add_mroute net/ipv6/addrconf.c:2549 [inline]
addrconf_add_dev+0x35b/0x540 net/ipv6/addrconf.c:2567
inet6_addr_add+0x1ee/0xe30 net/ipv6/addrconf.c:3029
inet6_rtm_newaddr+0xa89/0xf10 net/ipv6/addrconf.c:5054
rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6912
netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2543
netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:733
__sys_sendto+0x363/0x4c0 net/socket.c:2187
__do_sys_sendto net/socket.c:2194 [inline]
__se_sys_sendto net/socket.c:2190 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2190
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
The buggy address belongs to the object at ffff888021bc1c00
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
freed 512-byte region [ffff888021bc1c00, ffff888021bc1e00)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888021bc0400 pfn:0x21bc0
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 ffff88801b041c80 ffffea0000ec7710 ffffea000070f910
raw: ffff888021bc0400 000000000010000f 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801b041c80 ffffea0000ec7710 ffffea000070f910
head: ffff888021bc0400 000000000010000f 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea000086f001 ffffffffffffffff 0000000000000000
head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5850, tgid 5850 (syz-executor), ts 82464070442, free_ts 82417471779
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739
alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270
alloc_slab_page mm/slub.c:2423 [inline]
allocate_slab+0x8f/0x3a0 mm/slub.c:2587
new_slab mm/slub.c:2640 [inline]
___slab_alloc+0xc27/0x14a0 mm/slub.c:3826
__slab_alloc+0x58/0xa0 mm/slub.c:3916
__slab_alloc_node mm/slub.c:3991 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__do_kmalloc_node mm/slub.c:4293 [inline]
__kmalloc_noprof+0x2e6/0x4c0 mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
fib6_info_alloc+0x2e/0xf0 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x445/0x12b0 net/ipv6/route.c:3766
ip6_route_add+0x28/0x160 net/ipv6/route.c:3858
addrconf_prefix_route net/ipv6/addrconf.c:2485 [inline]
fixup_permanent_addr net/ipv6/addrconf.c:3594 [inline]
addrconf_permanent_addr+0x7c7/0xc50 net/ipv6/addrconf.c:3618
addrconf_notify+0x9f5/0x1020 net/ipv6/addrconf.c:3690
notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
__dev_notify_flags+0x207/0x400
dev_change_flags+0xf0/0x1a0 net/core/dev.c:9249
page last free pid 5834 tgid 5834 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660
stack_depot_save_flags+0x7c6/0x940 lib/stackdepot.c:674
kasan_save_stack mm/kasan/common.c:48 [inline]
kasan_save_track+0x51/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
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:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kfree+0x196/0x430 mm/slub.c:4757
free_modprobe_argv+0x5c/0x80 kernel/module/kmod.c:67
call_usermodehelper_freeinfo kernel/umh.c:42 [inline]
call_usermodehelper_exec+0x14d/0x4a0 kernel/umh.c:462
call_modprobe kernel/module/kmod.c:102 [inline]
__request_module+0x3ee/0x640 kernel/module/kmod.c:172
dev_load+0x18f/0x1f0 net/core/dev_ioctl.c:683
dev_ioctl+0x52e/0x1340 net/core/dev_ioctl.c:749
sock_do_ioctl+0x240/0x460 net/socket.c:1213
sock_ioctl+0x626/0x8e0 net/socket.c:1318
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
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
Memory state around the buggy address:
ffff888021bc1b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888021bc1b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888021bc1c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888021bc1c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888021bc1d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 48 21 c3 and %rax,%rbx
3: 0f 85 16 02 00 00 jne 0x21f
9: e8 56 eb 20 00 call 0x20eb64
e: 4c 8b 7c 24 10 mov 0x10(%rsp),%r15
13: 4d 85 f6 test %r14,%r14
16: 75 07 jne 0x1f
18: e8 47 eb 20 00 call 0x20eb64
1d: eb 06 jmp 0x25
1f: e8 40 eb 20 00 call 0x20eb64
24: fb sti
25: 48 8b 5c 24 18 mov 0x18(%rsp),%rbx
* 2a: 48 8b 44 24 30 mov 0x30(%rsp),%rax <-- trapping instruction
2f: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
34: 74 08 je 0x3e
36: 48 89 df mov %rbx,%rdi
39: e8 76 28 88 00 call 0x8828b4
3e: 4c rex.WR
3f: 8b .byte 0x8b