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AJvYcCXEdaew21mBC8I5uP/qfJem+t4Ldh8HMk+TcfKWrdykMYsiF1DLdY4DqFj57xDgyGKcT2f03NugiIaXWC3CvFlISN9qCsUofYWE506r X-Gm-Message-State: AOJu0YwrJWhYHwKiBZr82CByxxhs3WfHnmG92MbNAIt2wlnj6GQYUDUi T7XB4huSP9yj2tpVxfc6Zt3GJlwWTUQhw+5Ne+hvz2Uqia3BG7IiLIDHbTVOBLbwPyCyDJH3EXr XsqvuVSOp2tt8NclVib64wEzeNqNa5y7kGJGlYVT6m1qYxozb0s8DK3w= X-Google-Smtp-Source: AGHT+IEdxoPw9Ix8HMe6DgpfePcRFI+sIQyO/ZLriMsU48ym4D+k9KhT+QfE0Z9wp7r8dquN81s1KIebcv558n5lZUlY3+jlDiup Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:8715:b0:4b7:c9b5:6765 with SMTP id 8926c6da1cb9f-4c23feb73f3mr319070173.5.1721553963417; Sun, 21 Jul 2024 02:26:03 -0700 (PDT) Date: Sun, 21 Jul 2024 02:26:03 -0700 In-Reply-To: <20240721085206.230835-1-aha310510@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000007392c3061dbe8470@google.com> Subject: Re: [syzbot] [bpf?] [net?] KASAN: slab-use-after-free Read in bq_xmit_all From: syzbot To: aha310510@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: general protection fault in __dev_flush Oops: general protection fault, probably for non-canonical address 0xe3fffa2200be422b: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: maybe wild-memory-access in range [0x1ffff11005f21158-0x1ffff11005f2115f] CPU: 1 PID: 6413 Comm: syz.0.240 Not tainted 6.10.0-syzkaller-11185-g2c9b3512402e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:__dev_flush+0x5b/0x160 Code: 48 89 ef e8 97 80 3a 00 48 8b 5d 00 48 39 eb 0f 84 ff 00 00 00 48 89 2c 24 49 89 dd 49 c1 ed 03 48 b8 00 00 00 00 00 fc ff df <41> 80 7c 05 00 00 74 08 48 89 df e8 65 80 3a 00 48 8b 03 48 89 44 RSP: 0018:ffffc90000a18af0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 1ffff11005f2115a RCX: ffff88802f908000 RDX: 0000000080000100 RSI: 0000000000000010 RDI: ffffc900039ff810 RBP: ffffc900039ff810 R08: ffffffff895fbdfa R09: 1ffffffff1f5d135 R10: dffffc0000000000 R11: fffffbfff1f5d136 R12: 0000000000000000 R13: 03fffe2200be422b R14: 0000000000000010 R15: ffffc900039ff810 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fba6ef06030 CR3: 0000000077bb8000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: xdp_do_check_flushed+0x129/0x240 net/core/filter.c:4300 __napi_poll+0xe4/0x490 net/core/dev.c:6774 napi_poll net/core/dev.c:6840 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:6962 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:memcg_account_kmem+0x0/0x1e0 mm/memcontrol.c:3371 Code: c1 0f 8c 4e ff ff ff 48 89 df e8 db 1c f7 ff e9 41 ff ff ff e8 81 d4 87 09 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 RSP: 0018:ffffc900039ffa50 EFLAGS: 00000297 RAX: ffff888026bc4000 RBX: 0000000000000001 RCX: ffffc900039ff903 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff888026bc4000 RBP: ffff888026bc4000 R08: ffffffff8fae89af R09: 1ffffffff1f5d135 R10: dffffc0000000000 R11: fffffbfff1f5d136 R12: 1ffffd4000155f37 R13: ffff88802f460980 R14: dffffc0000000000 R15: ffffea0000aaf9b8 obj_cgroup_uncharge_pages mm/memcontrol.c:3394 [inline] __memcg_kmem_uncharge_page+0x104/0x310 mm/memcontrol.c:3468 memcg_kmem_uncharge_page include/linux/memcontrol.h:1818 [inline] exit_task_stack_account+0x94/0x340 kernel/fork.c:564 do_exit+0x1d02/0x27f0 kernel/exit.c:918 do_group_exit+0x207/0x2c0 kernel/exit.c:1026 get_signal+0x16a1/0x1740 kernel/signal.c:2917 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fba6ed75b59 Code: Unable to access opcode bytes at 0x7fba6ed75b2f. RSP: 002b:00007fba6e7ff0f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fba6ef05f68 RCX: 00007fba6ed75b59 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fba6ef05f68 RBP: 00007fba6ef05f60 R08: 00007fba6e7ff6c0 R09: 00007fba6e7ff6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fba6ef05f6c R13: 000000000000000b R14: 00007ffedc919aa0 R15: 00007ffedc919b88 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__dev_flush+0x5b/0x160 Code: 48 89 ef e8 97 80 3a 00 48 8b 5d 00 48 39 eb 0f 84 ff 00 00 00 48 89 2c 24 49 89 dd 49 c1 ed 03 48 b8 00 00 00 00 00 fc ff df <41> 80 7c 05 00 00 74 08 48 89 df e8 65 80 3a 00 48 8b 03 48 89 44 RSP: 0018:ffffc90000a18af0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 1ffff11005f2115a RCX: ffff88802f908000 RDX: 0000000080000100 RSI: 0000000000000010 RDI: ffffc900039ff810 RBP: ffffc900039ff810 R08: ffffffff895fbdfa R09: 1ffffffff1f5d135 R10: dffffc0000000000 R11: fffffbfff1f5d136 R12: 0000000000000000 R13: 03fffe2200be422b R14: 0000000000000010 R15: ffffc900039ff810 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fba6ef06030 CR3: 000000000e134000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 89 ef mov %rbp,%rdi 3: e8 97 80 3a 00 call 0x3a809f 8: 48 8b 5d 00 mov 0x0(%rbp),%rbx c: 48 39 eb cmp %rbp,%rbx f: 0f 84 ff 00 00 00 je 0x114 15: 48 89 2c 24 mov %rbp,(%rsp) 19: 49 89 dd mov %rbx,%r13 1c: 49 c1 ed 03 shr $0x3,%r13 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 41 80 7c 05 00 00 cmpb $0x0,0x0(%r13,%rax,1) <-- trapping instruction 30: 74 08 je 0x3a 32: 48 89 df mov %rbx,%rdi 35: e8 65 80 3a 00 call 0x3a809f 3a: 48 8b 03 mov (%rbx),%rax 3d: 48 rex.W 3e: 89 .byte 0x89 3f: 44 rex.R Tested on: commit: 2c9b3512 Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1283bdfd980000 kernel config: https://syzkaller.appspot.com/x/.config?x=f4925140c45a2a50 dashboard link: https://syzkaller.appspot.com/bug?extid=707d98c8649695eaf329 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied.