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Wed, 17 Sep 2025 06:37:31 +0000 Date: Wed, 17 Sep 2025 14:37:16 +0800 From: kernel test robot To: Kuniyuki Iwashima CC: , , Shakeel Butt , , , Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Martin KaFai Lau , John Fastabend , "Stanislav Fomichev" , Johannes Weiner , "Michal Hocko" , Roman Gushchin , "David S. Miller" , Eric Dumazet , "Jakub Kicinski" , Paolo Abeni , Neal Cardwell , Willem de Bruijn , Mina Almasry , Kuniyuki Iwashima , "Kuniyuki Iwashima" , , Subject: Re: [PATCH v8 bpf-next/net 1/6] tcp: Save lock_sock() for memcg in inet_csk_accept(). 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Z97X-UD5H/Z97X-UD5H, BIOS F9 04/21/2015 [ 469.011395][T30180] Call Trace: [ 469.011396][T30180] [ 469.011398][T30180] dump_stack_lvl+0x47/0x70 [ 469.011403][T30180] print_address_description+0x88/0x320 [ 469.011408][T30180] ? __inet_accept+0x5c6/0x640 [ 469.011410][T30180] print_report+0x106/0x1f4 [ 469.011413][T30180] ? __inet_accept+0x5c6/0x640 [ 469.011415][T30180] ? __inet_accept+0x5c6/0x640 [ 469.011417][T30180] kasan_report+0xb5/0xf0 [ 469.011421][T30180] ? __inet_accept+0x5c6/0x640 [ 469.011424][T30180] __inet_accept+0x5c6/0x640 [ 468.992753][T30180] BUG: KASAN: slab-out-of-bounds in __inet_accept+0x5c6/0x640 [ 469.011427][T30180] inet_accept+0xe2/0x170 [ 469.000550][T30180] Read of size 1 at addr ffff88810df4ea20 by task netstress/30180 [ 469.011430][T30180] do_accept+0x2e5/0x480 [ 469.008720][T30180] [ 469.011434][T30180] ? folio_xchg_last_cpupid+0xc5/0x130 [ 469.011389][T30180] CPU: 0 UID: 0 PID: 30180 Comm: netstress Not tainted 6.17.0-rc2-00437-gd465aa099428 #1 PREEMPT(voluntary) [ 469.011393][T30180] Hardware name: Gigabyte Technology Co., Ltd. Z97X-UD5H/Z97X-UD5H, BIOS F9 04/21/2015 [ 469.011437][T30180] ? __pfx_do_accept+0x10/0x10 [ 469.011395][T30180] Call Trace: [ 469.011441][T30180] ? _raw_spin_lock+0x80/0xe0 [ 469.011396][T30180] [ 469.011444][T30180] ? __pfx__raw_spin_lock+0x10/0x10 [ 469.011398][T30180] dump_stack_lvl+0x47/0x70 [ 469.011447][T30180] ? alloc_fd+0x266/0x410 [ 469.011403][T30180] print_address_description+0x88/0x320 [ 469.011451][T30180] __sys_accept4+0xc4/0x150 [ 469.011454][T30180] ? __pfx___sys_accept4+0x10/0x10 [ 469.011458][T30180] __x64_sys_accept+0x70/0xb0 [ 469.011461][T30180] do_syscall_64+0x7b/0x2c0 [ 469.011466][T30180] ? __pfx___handle_mm_fault+0x10/0x10 [ 469.011468][T30180] ? __pfx_css_rstat_updated+0x10/0x10 [ 469.011471][T30180] ? count_memcg_events+0x253/0x3f0 [ 469.011475][T30180] ? handle_mm_fault+0x382/0x6c0 [ 469.011478][T30180] ? do_user_addr_fault+0x820/0xd60 [ 469.011482][T30180] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 469.011485][T30180] RIP: 0033:0x7f9c169c4687 [ 469.011488][T30180] Code: 48 89 fa 4c 89 df e8 58 b3 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff [ 469.011490][T30180] RSP: 002b:00007ffff0036ac0 EFLAGS: 00000202 ORIG_RAX: 000000000000002b [ 469.011494][T30180] RAX: ffffffffffffffda RBX: 00007f9c16932740 RCX: 00007f9c169c4687 [ 469.011496][T30180] RDX: 00007ffff0036b14 RSI: 00007ffff0036b20 RDI: 0000000000000006 [ 469.011498][T30180] RBP: 0000562f1b4e85a0 R08: 0000000000000000 R09: 0000000000000000 [ 469.011500][T30180] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffff0036b18 [ 469.011501][T30180] R13: 00007ffff0036b20 R14: 00007ffff0036b14 R15: 0000562f1b4d3e5f [ 469.011504][T30180] [ 469.011505][T30180] [ 469.257645][T30180] The buggy address belongs to the object at ffff88810df4e800 [ 469.257645][T30180] which belongs to the cache SCTPv6 of size 1536 [ 469.271959][T30180] The buggy address is located 544 bytes inside of [ 469.271959][T30180] allocated 1536-byte region [ffff88810df4e800, ffff88810df4ee00) [ 469.286795][T30180] [ 469.289353][T30180] The buggy address belongs to the physical page: [ 469.296000][T30180] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10df48 [ 469.305055][T30180] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 469.313790][T30180] memcg:ffff888223ff8201 [ 469.318241][T30180] flags: 0x17ffffc0000040(head|node=0|zone=2|lastcpupid=0x1fffff) [ 469.326258][T30180] page_type: f5(slab) [ 469.011408][T30180] ? __inet_accept+0x5c6/0x640 [ 469.330466][T30180] raw: 0017ffffc0000040 ffff888101e08640 dead000000000122 0000000000000000 [ 469.011410][T30180] print_report+0x106/0x1f4 [ 469.339270][T30180] raw: 0000000000000000 0000000080130013 00000000f5000000 ffff888223ff8201 [ 469.011413][T30180] ? __inet_accept+0x5c6/0x640 [ 469.348078][T30180] head: 0017ffffc0000040 ffff888101e08640 dead000000000122 0000000000000000 [ 469.011415][T30180] ? __inet_accept+0x5c6/0x640 [ 469.356993][T30180] head: 0000000000000000 0000000080130013 00000000f5000000 ffff888223ff8201 [ 469.011417][T30180] kasan_report+0xb5/0xf0 [ 469.365914][T30180] head: 0017ffffc0000003 ffffea000437d201 00000000ffffffff 00000000ffffffff [ 469.011421][T30180] ? __inet_accept+0x5c6/0x640 [ 469.374851][T30180] head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 [ 469.011424][T30180] __inet_accept+0x5c6/0x640 [ 469.383788][T30180] page dumped because: kasan: bad access detected [ 469.011427][T30180] inet_accept+0xe2/0x170 [ 469.390449][T30180] [ 469.011430][T30180] do_accept+0x2e5/0x480 [ 469.011434][T30180] ? folio_xchg_last_cpupid+0xc5/0x130 [ 469.393031][T30180] Memory state around the buggy address: [ 469.011437][T30180] ? __pfx_do_accept+0x10/0x10 [ 469.398939][T30180] ffff88810df4e900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 469.011441][T30180] ? _raw_spin_lock+0x80/0xe0 [ 469.407261][T30180] ffff88810df4e980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 469.011444][T30180] ? __pfx__raw_spin_lock+0x10/0x10 [ 469.415589][T30180] >ffff88810df4ea00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 469.011447][T30180] ? alloc_fd+0x266/0x410 [ 469.423933][T30180] ^ [ 469.011451][T30180] __sys_accept4+0xc4/0x150 [ 469.429308][T30180] ffff88810df4ea80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 469.011454][T30180] ? __pfx___sys_accept4+0x10/0x10 [ 469.437670][T30180] ffff88810df4eb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 469.011458][T30180] __x64_sys_accept+0x70/0xb0 [ 469.446024][T30180] ================================================================== [ 469.011461][T30180] do_syscall_64+0x7b/0x2c0 [ 469.454415][T30180] Disabling lock debugging due to kernel taint [ 469.011466][T30180] ? __pfx___handle_mm_fault+0x10/0x10 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki