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BUG: KASAN: use-after-free in dev_map_generic_redirect+0x9f/0x7d0 kernel/bpf/devmap.c:668
Read of size 8 at addr ffff888116893980 by task syz.1.4071/16650
CPU: 0 PID: 16650 Comm: syz.1.4071 Not tainted 6.1.118-syzkaller-00025-gef4fb40b87a9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:316 [inline]
print_report+0x158/0x4e0 mm/kasan/report.c:427
kasan_report+0x13c/0x170 mm/kasan/report.c:531
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:351
dev_map_generic_redirect+0x9f/0x7d0 kernel/bpf/devmap.c:668
xdp_do_generic_redirect_map net/core/filter.c:4392 [inline]
xdp_do_generic_redirect+0x42e/0xb40 net/core/filter.c:4451
do_xdp_generic+0x53e/0x800 net/core/dev.c:4966
__netif_receive_skb_core+0x19ae/0x43d0 net/core/dev.c:5373
__netif_receive_skb_one_core net/core/dev.c:5550 [inline]
__netif_receive_skb+0x11c/0x530 net/core/dev.c:5666
process_backlog+0x32c/0x630 net/core/dev.c:5994
__napi_poll+0xbe/0x5c0 net/core/dev.c:6561
napi_poll net/core/dev.c:6628 [inline]
net_rx_action+0x595/0xdd0 net/core/dev.c:6742
handle_softirqs+0x1db/0x650 kernel/softirq.c:617
__do_softirq+0xb/0xd kernel/softirq.c:655
do_softirq+0xf6/0x150 kernel/softirq.c:499
__local_bh_enable_ip+0x75/0x80 kernel/softirq.c:423
local_bh_enable include/linux/bottom_half.h:33 [inline]
netif_rx+0x84/0x2c0 net/core/dev.c:5068
tipc_clone_to_loopback+0x3be/0x4a0 net/tipc/bearer.c:789
tipc_loopback_trace net/tipc/bearer.h:256 [inline]
tipc_node_xmit+0xb88/0xe40 net/tipc/node.c:1701
__tipc_sendmsg+0x1e82/0x3240 net/tipc/socket.c:1515
tipc_connect+0x4fd/0x710 net/tipc/socket.c:2625
__sys_connect_file net/socket.c:2001 [inline]
__sys_connect+0x2c9/0x300 net/socket.c:2018
__do_sys_connect net/socket.c:2028 [inline]
__se_sys_connect net/socket.c:2025 [inline]
__x64_sys_connect+0x7a/0x90 net/socket.c:2025
x64_sys_call+0x14e/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:43
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f022f38cd29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f023015d038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f022f5a5fa0 RCX: 00007f022f38cd29
RDX: 0000000000000010 RSI: 0000000020000000 RDI: 000000000000000d
RBP: 00007f022f40e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f022f5a5fa0 R15: 00007fffc035fef8
Allocated by task 103:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
____kasan_kmalloc mm/kasan/common.c:379 [inline]
__kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388
kasan_kmalloc include/linux/kasan.h:212 [inline]
kmalloc_trace+0x44/0xa0 mm/slab_common.c:1033
kmalloc include/linux/slab.h:557 [inline]
kzalloc include/linux/slab.h:693 [inline]
kernfs_get_open_node fs/kernfs/file.c:574 [inline]
kernfs_fop_open+0x70e/0xb10 fs/kernfs/file.c:742
do_dentry_open+0x891/0x1250 fs/open.c:884
vfs_open+0x73/0x80 fs/open.c:1015
do_open fs/namei.c:3625 [inline]
path_openat+0x2532/0x2d60 fs/namei.c:3782
do_filp_open+0x230/0x480 fs/namei.c:3809
do_sys_openat2+0x151/0x870 fs/open.c:1341
do_sys_open fs/open.c:1357 [inline]
__do_sys_openat fs/open.c:1373 [inline]
__se_sys_openat fs/open.c:1368 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1368
x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:258
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
kvfree_call_rcu+0x9f/0x800 kernel/rcu/tree.c:3445
kernfs_unlink_open_file+0x327/0x3d0 fs/kernfs/file.c:635
kernfs_fop_release+0x253/0x310 fs/kernfs/file.c:807
__fput+0x1e5/0x870 fs/file_table.c:320
____fput+0x15/0x20 fs/file_table.c:348
task_work_run+0x24d/0x2e0 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0x94/0xa0 kernel/entry/common.c:177
exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Second to last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
kvfree_call_rcu+0x9f/0x800 kernel/rcu/tree.c:3445
kernfs_unlink_open_file+0x327/0x3d0 fs/kernfs/file.c:635
kernfs_fop_release+0x253/0x310 fs/kernfs/file.c:807
__fput+0x1e5/0x870 fs/file_table.c:320
____fput+0x15/0x20 fs/file_table.c:348
task_work_run+0x24d/0x2e0 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0x94/0xa0 kernel/entry/common.c:177
exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
The buggy address belongs to the object at ffff888116893980
which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes inside of
96-byte region [ffff888116893980, ffff8881168939e0)
The buggy address belongs to the physical page:
page:ffffea00045a24c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888116893a00 pfn:0x116893
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 ffffea0004572988 ffffea0004523308 ffff888100042900
raw: ffff888116893a00 0000000000200001 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 117, tgid 117 (udevadm), ts 4104860338, free_ts 0
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x213/0x220 mm/page_alloc.c:2590
prep_new_page+0x1b/0x110 mm/page_alloc.c:2597
get_page_from_freelist+0x2f41/0x2fc0 mm/page_alloc.c:4462
__alloc_pages+0x234/0x610 mm/page_alloc.c:5759
alloc_slab_page+0x6c/0xf0
allocate_slab mm/slub.c:1962 [inline]
new_slab+0x90/0x3e0 mm/slub.c:2015
___slab_alloc+0x6f9/0xb80 mm/slub.c:3203
__slab_alloc+0x5d/0xa0 mm/slub.c:3302
slab_alloc_node mm/slub.c:3387 [inline]
__kmem_cache_alloc_node+0x207/0x2a0 mm/slub.c:3462
kmalloc_trace+0x2a/0xa0 mm/slab_common.c:1028
kmalloc include/linux/slab.h:557 [inline]
kzalloc include/linux/slab.h:693 [inline]
kernfs_get_open_node fs/kernfs/file.c:574 [inline]
kernfs_fop_open+0x70e/0xb10 fs/kernfs/file.c:742
do_dentry_open+0x891/0x1250 fs/open.c:884
vfs_open+0x73/0x80 fs/open.c:1015
do_open fs/namei.c:3625 [inline]
path_openat+0x2532/0x2d60 fs/namei.c:3782
do_filp_open+0x230/0x480 fs/namei.c:3809
do_sys_openat2+0x151/0x870 fs/open.c:1341
page_owner free stack trace missing
Memory state around the buggy address:
ffff888116893880: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
ffff888116893900: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff888116893980: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
^
ffff888116893a00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
ffff888116893a80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
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