[v5.15] KASAN: use-after-free Read in __nft_trace_packet
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syzbot
Sep 13, 2024, 8:31:26 PM9/13/24
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 3a5928702e71 Linux 5.15.167
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10e10407980000
kernel config: https://syzkaller.appspot.com/x/.config?x=4d3fd5cca89ae935
dashboard link: https://syzkaller.appspot.com/bug?extid=2a8850ea36efb12f5aed
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ef5025f3d708/disk-3a592870.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/776fbdad3aa8/vmlinux-3a592870.xz
kernel image: https://storage.googleapis.com/syzbot-assets/79541db5bd16/bzImage-3a592870.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2a8850...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __nft_trace_packet+0x137/0x150 net/netfilter/nf_tables_core.c:30
Read of size 2 at addr ffff88805a0c7300 by task ksoftirqd/0/14
CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
print_address_description+0x63/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
__nft_trace_packet+0x137/0x150 net/netfilter/nf_tables_core.c:30
nft_trace_verdict net/netfilter/nf_tables_core.c:110 [inline]
nft_do_chain+0x1453/0x16b0 net/netfilter/nf_tables_core.c:256
nft_do_chain_inet+0x3f8/0x680 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:584
nf_hook include/linux/netfilter.h:257 [inline]
NF_HOOK+0x26b/0x410 include/linux/netfilter.h:300
NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5485 [inline]
__netif_receive_skb+0x1c6/0x530 net/core/dev.c:5599
process_backlog+0x363/0x7f0 net/core/dev.c:6476
__napi_poll+0xc7/0x440 net/core/dev.c:7035
napi_poll net/core/dev.c:7102 [inline]
net_rx_action+0x617/0xda0 net/core/dev.c:7192
handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
run_ksoftirqd+0xc6/0x120 kernel/softirq.c:925
smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Allocated by task 14:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
kmem_cache_alloc_node+0x121/0x2c0 mm/slub.c:3256
__alloc_skb+0xdd/0x590 net/core/skbuff.c:415
alloc_skb include/linux/skbuff.h:1167 [inline]
synproxy_send_client_synack+0x1b6/0xf20 net/netfilter/nf_synproxy_core.c:482
nft_synproxy_eval_v4+0x3c6/0x610 net/netfilter/nft_synproxy.c:59
nft_synproxy_do_eval+0x359/0xa60 net/netfilter/nft_synproxy.c:141
expr_call_ops_eval net/netfilter/nf_tables_core.c:198 [inline]
nft_do_chain+0x467/0x16b0 net/netfilter/nf_tables_core.c:238
nft_do_chain_inet+0x3f8/0x680 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:584
nf_hook include/linux/netfilter.h:257 [inline]
NF_HOOK+0x26b/0x410 include/linux/netfilter.h:300
NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5485 [inline]
__netif_receive_skb+0x1c6/0x530 net/core/dev.c:5599
process_backlog+0x363/0x7f0 net/core/dev.c:6476
__napi_poll+0xc7/0x440 net/core/dev.c:7035
napi_poll net/core/dev.c:7102 [inline]
net_rx_action+0x617/0xda0 net/core/dev.c:7192
handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
run_ksoftirqd+0xc6/0x120 kernel/softirq.c:925
smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Freed by task 14:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kmem_cache_free+0x91/0x1f0 mm/slub.c:3515
nft_synproxy_eval_v4+0x3ce/0x610 net/netfilter/nft_synproxy.c:60
nft_synproxy_do_eval+0x359/0xa60 net/netfilter/nft_synproxy.c:141
expr_call_ops_eval net/netfilter/nf_tables_core.c:198 [inline]
nft_do_chain+0x467/0x16b0 net/netfilter/nf_tables_core.c:238
nft_do_chain_inet+0x3f8/0x680 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:584
nf_hook include/linux/netfilter.h:257 [inline]
NF_HOOK+0x26b/0x410 include/linux/netfilter.h:300
NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5485 [inline]
__netif_receive_skb+0x1c6/0x530 net/core/dev.c:5599
process_backlog+0x363/0x7f0 net/core/dev.c:6476
__napi_poll+0xc7/0x440 net/core/dev.c:7035
napi_poll net/core/dev.c:7102 [inline]
net_rx_action+0x617/0xda0 net/core/dev.c:7192
handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
run_ksoftirqd+0xc6/0x120 kernel/softirq.c:925
smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
The buggy address belongs to the object at ffff88805a0c7280
which belongs to the cache skbuff_head_cache of size 232
The buggy address is located 128 bytes inside of
232-byte region [ffff88805a0c7280, ffff88805a0c7368)
The buggy address belongs to the page:
page:ffffea00016831c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5a0c7
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 0000000000000000 dead000000000122 ffff88801bfe5140
raw: 0000000000000000 00000000000c000c 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 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 14, ts 56126754586, free_ts 56117644853
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
__alloc_pages+0x272/0x700 mm/page_alloc.c:5423
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
kmem_cache_alloc_node+0x1ba/0x2c0 mm/slub.c:3256
__alloc_skb+0xdd/0x590 net/core/skbuff.c:415
alloc_skb include/linux/skbuff.h:1167 [inline]
synproxy_send_client_synack+0x1b6/0xf20 net/netfilter/nf_synproxy_core.c:482
nft_synproxy_eval_v4+0x3c6/0x610 net/netfilter/nft_synproxy.c:59
nft_synproxy_do_eval+0x359/0xa60 net/netfilter/nft_synproxy.c:141
expr_call_ops_eval net/netfilter/nf_tables_core.c:198 [inline]
nft_do_chain+0x467/0x16b0 net/netfilter/nf_tables_core.c:238
nft_do_chain_inet+0x3f8/0x680 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:584
nf_hook include/linux/netfilter.h:257 [inline]
NF_HOOK+0x26b/0x410 include/linux/netfilter.h:300
NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5485 [inline]
__netif_receive_skb+0x1c6/0x530 net/core/dev.c:5599
process_backlog+0x363/0x7f0 net/core/dev.c:6476
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page_list+0x1f7/0x8e0 mm/page_alloc.c:3433
release_pages+0x1bb9/0x1f40 mm/swap.c:963
__pagevec_release+0x80/0xf0 mm/swap.c:983
pagevec_release include/linux/pagevec.h:81 [inline]
__invalidate_mapping_pages+0x68f/0x7c0 mm/truncate.c:509
btrfs_close_bdev fs/btrfs/volumes.c:1150 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1174 [inline]
close_fs_devices+0x41e/0x8e0 fs/btrfs/volumes.c:1217
btrfs_close_devices+0xc4/0x5c0 fs/btrfs/volumes.c:1232
close_ctree+0x731/0x890 fs/btrfs/disk-io.c:4518
generic_shutdown_super+0x136/0x2c0 fs/super.c:475
kill_anon_super+0x37/0x60 fs/super.c:1087
btrfs_kill_super+0x3d/0x50 fs/btrfs/super.c:2391
deactivate_locked_super+0xa0/0x110 fs/super.c:335
cleanup_mnt+0x44e/0x500 fs/namespace.c:1143
task_work_run+0x129/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
Memory state around the buggy address:
ffff88805a0c7200: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc
ffff88805a0c7280: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805a0c7300: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
^
ffff88805a0c7380: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
ffff88805a0c7400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
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If the report is already addressed, let syzbot know by replying with:
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If you want to overwrite report's subsystems, reply with:
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If the report is a duplicate of another one, reply with:
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If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 3a5928702e71 Linux 5.15.167
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10e10407980000
kernel config: https://syzkaller.appspot.com/x/.config?x=4d3fd5cca89ae935
dashboard link: https://syzkaller.appspot.com/bug?extid=2a8850ea36efb12f5aed
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ef5025f3d708/disk-3a592870.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/776fbdad3aa8/vmlinux-3a592870.xz
kernel image: https://storage.googleapis.com/syzbot-assets/79541db5bd16/bzImage-3a592870.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2a8850...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __nft_trace_packet+0x137/0x150 net/netfilter/nf_tables_core.c:30
Read of size 2 at addr ffff88805a0c7300 by task ksoftirqd/0/14
CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
print_address_description+0x63/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
__nft_trace_packet+0x137/0x150 net/netfilter/nf_tables_core.c:30
nft_trace_verdict net/netfilter/nf_tables_core.c:110 [inline]
nft_do_chain+0x1453/0x16b0 net/netfilter/nf_tables_core.c:256
nft_do_chain_inet+0x3f8/0x680 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:584
nf_hook include/linux/netfilter.h:257 [inline]
NF_HOOK+0x26b/0x410 include/linux/netfilter.h:300
NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5485 [inline]
__netif_receive_skb+0x1c6/0x530 net/core/dev.c:5599
process_backlog+0x363/0x7f0 net/core/dev.c:6476
__napi_poll+0xc7/0x440 net/core/dev.c:7035
napi_poll net/core/dev.c:7102 [inline]
net_rx_action+0x617/0xda0 net/core/dev.c:7192
handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
run_ksoftirqd+0xc6/0x120 kernel/softirq.c:925
smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Allocated by task 14:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
kmem_cache_alloc_node+0x121/0x2c0 mm/slub.c:3256
__alloc_skb+0xdd/0x590 net/core/skbuff.c:415
alloc_skb include/linux/skbuff.h:1167 [inline]
synproxy_send_client_synack+0x1b6/0xf20 net/netfilter/nf_synproxy_core.c:482
nft_synproxy_eval_v4+0x3c6/0x610 net/netfilter/nft_synproxy.c:59
nft_synproxy_do_eval+0x359/0xa60 net/netfilter/nft_synproxy.c:141
expr_call_ops_eval net/netfilter/nf_tables_core.c:198 [inline]
nft_do_chain+0x467/0x16b0 net/netfilter/nf_tables_core.c:238
nft_do_chain_inet+0x3f8/0x680 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:584
nf_hook include/linux/netfilter.h:257 [inline]
NF_HOOK+0x26b/0x410 include/linux/netfilter.h:300
NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5485 [inline]
__netif_receive_skb+0x1c6/0x530 net/core/dev.c:5599
process_backlog+0x363/0x7f0 net/core/dev.c:6476
__napi_poll+0xc7/0x440 net/core/dev.c:7035
napi_poll net/core/dev.c:7102 [inline]
net_rx_action+0x617/0xda0 net/core/dev.c:7192
handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
run_ksoftirqd+0xc6/0x120 kernel/softirq.c:925
smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Freed by task 14:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kmem_cache_free+0x91/0x1f0 mm/slub.c:3515
nft_synproxy_eval_v4+0x3ce/0x610 net/netfilter/nft_synproxy.c:60
nft_synproxy_do_eval+0x359/0xa60 net/netfilter/nft_synproxy.c:141
expr_call_ops_eval net/netfilter/nf_tables_core.c:198 [inline]
nft_do_chain+0x467/0x16b0 net/netfilter/nf_tables_core.c:238
nft_do_chain_inet+0x3f8/0x680 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:584
nf_hook include/linux/netfilter.h:257 [inline]
NF_HOOK+0x26b/0x410 include/linux/netfilter.h:300
NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5485 [inline]
__netif_receive_skb+0x1c6/0x530 net/core/dev.c:5599
process_backlog+0x363/0x7f0 net/core/dev.c:6476
__napi_poll+0xc7/0x440 net/core/dev.c:7035
napi_poll net/core/dev.c:7102 [inline]
net_rx_action+0x617/0xda0 net/core/dev.c:7192
handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
run_ksoftirqd+0xc6/0x120 kernel/softirq.c:925
smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
The buggy address belongs to the object at ffff88805a0c7280
which belongs to the cache skbuff_head_cache of size 232
The buggy address is located 128 bytes inside of
232-byte region [ffff88805a0c7280, ffff88805a0c7368)
The buggy address belongs to the page:
page:ffffea00016831c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5a0c7
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 0000000000000000 dead000000000122 ffff88801bfe5140
raw: 0000000000000000 00000000000c000c 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 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 14, ts 56126754586, free_ts 56117644853
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
__alloc_pages+0x272/0x700 mm/page_alloc.c:5423
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
kmem_cache_alloc_node+0x1ba/0x2c0 mm/slub.c:3256
__alloc_skb+0xdd/0x590 net/core/skbuff.c:415
alloc_skb include/linux/skbuff.h:1167 [inline]
synproxy_send_client_synack+0x1b6/0xf20 net/netfilter/nf_synproxy_core.c:482
nft_synproxy_eval_v4+0x3c6/0x610 net/netfilter/nft_synproxy.c:59
nft_synproxy_do_eval+0x359/0xa60 net/netfilter/nft_synproxy.c:141
expr_call_ops_eval net/netfilter/nf_tables_core.c:198 [inline]
nft_do_chain+0x467/0x16b0 net/netfilter/nf_tables_core.c:238
nft_do_chain_inet+0x3f8/0x680 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:584
nf_hook include/linux/netfilter.h:257 [inline]
NF_HOOK+0x26b/0x410 include/linux/netfilter.h:300
NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5485 [inline]
__netif_receive_skb+0x1c6/0x530 net/core/dev.c:5599
process_backlog+0x363/0x7f0 net/core/dev.c:6476
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page_list+0x1f7/0x8e0 mm/page_alloc.c:3433
release_pages+0x1bb9/0x1f40 mm/swap.c:963
__pagevec_release+0x80/0xf0 mm/swap.c:983
pagevec_release include/linux/pagevec.h:81 [inline]
__invalidate_mapping_pages+0x68f/0x7c0 mm/truncate.c:509
btrfs_close_bdev fs/btrfs/volumes.c:1150 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1174 [inline]
close_fs_devices+0x41e/0x8e0 fs/btrfs/volumes.c:1217
btrfs_close_devices+0xc4/0x5c0 fs/btrfs/volumes.c:1232
close_ctree+0x731/0x890 fs/btrfs/disk-io.c:4518
generic_shutdown_super+0x136/0x2c0 fs/super.c:475
kill_anon_super+0x37/0x60 fs/super.c:1087
btrfs_kill_super+0x3d/0x50 fs/btrfs/super.c:2391
deactivate_locked_super+0xa0/0x110 fs/super.c:335
cleanup_mnt+0x44e/0x500 fs/namespace.c:1143
task_work_run+0x129/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
Memory state around the buggy address:
ffff88805a0c7200: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc
ffff88805a0c7280: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805a0c7300: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
^
ffff88805a0c7380: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
ffff88805a0c7400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
Sep 23, 2024, 9:44:24 PM9/23/24
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 3a5928702e71 Linux 5.15.167
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12f48c80580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13e292a9980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ef5025f3d708/disk-3a592870.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/776fbdad3aa8/vmlinux-3a592870.xz
kernel image: https://storage.googleapis.com/syzbot-assets/79541db5bd16/bzImage-3a592870.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2a8850...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __nft_trace_packet+0x137/0x150 net/netfilter/nf_tables_core.c:30
Read of size 2 at addr ffff88807d8811c0 by task ksoftirqd/1/20
CPU: 1 PID: 20 Comm: ksoftirqd/1 Not tainted 5.15.167-syzkaller #0
Allocated by task 20:
Freed by task 20:
The buggy address belongs to the object at ffff88807d881140
sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2530
unix_dgram_sendmsg+0x6fd/0x2090 net/unix/af_unix.c:1798
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
sock_write_iter+0x39b/0x530 net/socket.c:1079
call_write_iter include/linux/fs.h:2172 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacd/0xe50 fs/read_write.c:594
ksys_write+0x1a2/0x2c0 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
do_slab_free mm/slub.c:3487 [inline]
___cache_free+0xe3/0x100 mm/slub.c:3506
qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444
kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233
kmem_cache_zalloc include/linux/slab.h:711 [inline]
lsm_inode_alloc security/security.c:595 [inline]
security_inode_alloc+0x24/0x110 security/security.c:1033
inode_init_always+0x939/0xc70 fs/inode.c:207
alloc_inode fs/inode.c:243 [inline]
iget_locked+0x212/0x7f0 fs/inode.c:1279
kernfs_get_inode+0x4c/0x6b0 fs/kernfs/inode.c:250
kernfs_iop_lookup+0x1d7/0x2f0 fs/kernfs/dir.c:1143
__lookup_slow+0x275/0x3d0 fs/namei.c:1663
lookup_slow+0x53/0x70 fs/namei.c:1680
walk_component+0x48c/0x610 fs/namei.c:1976
Memory state around the buggy address:
ffff88807d881080: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
ffff88807d881100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
>ffff88807d881180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807d881200: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc
ffff88807d881280: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
HEAD commit: 3a5928702e71 Linux 5.15.167
git tree: linux-5.15.y
kernel config: https://syzkaller.appspot.com/x/.config?x=4d3fd5cca89ae935
dashboard link: https://syzkaller.appspot.com/bug?extid=2a8850ea36efb12f5aed
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=145bca27980000
dashboard link: https://syzkaller.appspot.com/bug?extid=2a8850ea36efb12f5aed
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13e292a9980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ef5025f3d708/disk-3a592870.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/776fbdad3aa8/vmlinux-3a592870.xz
kernel image: https://storage.googleapis.com/syzbot-assets/79541db5bd16/bzImage-3a592870.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2a8850...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __nft_trace_packet+0x137/0x150 net/netfilter/nf_tables_core.c:30
CPU: 1 PID: 20 Comm: ksoftirqd/1 Not tainted 5.15.167-syzkaller #0
which belongs to the cache skbuff_head_cache of size 232
The buggy address is located 128 bytes inside of
232-byte region [ffff88807d881140, ffff88807d881228)
The buggy address is located 128 bytes inside of
The buggy address belongs to the page:
page:ffffea0001f62040 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d881
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 dead000000000100 dead000000000122 ffff888144bf2140
raw: 0000000000000000 00000000000c000c 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 3038, ts 21560678733, free_ts 21546722862
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
__alloc_pages+0x272/0x700 mm/page_alloc.c:5423
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
kmem_cache_alloc_node+0x1ba/0x2c0 mm/slub.c:3256
__alloc_skb+0xdd/0x590 net/core/skbuff.c:415
alloc_skb include/linux/skbuff.h:1167 [inline]
alloc_skb_with_frags+0xa3/0x780 net/core/skbuff.c:6170
get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
__alloc_pages+0x272/0x700 mm/page_alloc.c:5423
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
kmem_cache_alloc_node+0x1ba/0x2c0 mm/slub.c:3256
__alloc_skb+0xdd/0x590 net/core/skbuff.c:415
alloc_skb include/linux/skbuff.h:1167 [inline]
sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2530
unix_dgram_sendmsg+0x6fd/0x2090 net/unix/af_unix.c:1798
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
sock_write_iter+0x39b/0x530 net/socket.c:1079
call_write_iter include/linux/fs.h:2172 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacd/0xe50 fs/read_write.c:594
ksys_write+0x1a2/0x2c0 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
do_slab_free mm/slub.c:3487 [inline]
___cache_free+0xe3/0x100 mm/slub.c:3506
qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
slab_alloc mm/slub.c:3228 [inline]
slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233
kmem_cache_zalloc include/linux/slab.h:711 [inline]
lsm_inode_alloc security/security.c:595 [inline]
security_inode_alloc+0x24/0x110 security/security.c:1033
inode_init_always+0x939/0xc70 fs/inode.c:207
alloc_inode fs/inode.c:243 [inline]
iget_locked+0x212/0x7f0 fs/inode.c:1279
kernfs_get_inode+0x4c/0x6b0 fs/kernfs/inode.c:250
kernfs_iop_lookup+0x1d7/0x2f0 fs/kernfs/dir.c:1143
__lookup_slow+0x275/0x3d0 fs/namei.c:1663
lookup_slow+0x53/0x70 fs/namei.c:1680
walk_component+0x48c/0x610 fs/namei.c:1976
Memory state around the buggy address:
ffff88807d881100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
>ffff88807d881180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807d881200: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc
ffff88807d881280: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
syzbot
Apr 22, 2025, 1:12:04 AM4/22/25
to syzkaller...@googlegroups.com
syzbot suspects this issue could be fixed by backporting the following commit:
commit e34b9ed96ce3b06c79bf884009b16961ca478f87
git tree: upstream
Author: Florian Westphal <f...@strlen.de>
Date: Wed Jun 22 14:43:57 2022 +0000
netfilter: nf_tables: avoid skb access on nf_stolen
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16cdfccc580000
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
commit e34b9ed96ce3b06c79bf884009b16961ca478f87
git tree: upstream
Author: Florian Westphal <f...@strlen.de>
Date: Wed Jun 22 14:43:57 2022 +0000
netfilter: nf_tables: avoid skb access on nf_stolen
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16cdfccc580000
kernel config: https://syzkaller.appspot.com/x/.config?x=4d3fd5cca89ae935
dashboard link: https://syzkaller.appspot.com/bug?extid=2a8850ea36efb12f5aed
dashboard link: https://syzkaller.appspot.com/bug?extid=2a8850ea36efb12f5aed
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=145bca27980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13e292a9980000
Please keep in mind that other backports might be required as well.
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13e292a9980000
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
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