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Message-ID: <0000000000006b5df5061dc0b280@google.com> Date: Sun, 21 Jul 2024 05:02:04 -0700 From: syzbot <syzbot+707d98c8649695eaf329@...kaller.appspotmail.com> To: aha310510@...il.com, linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot] [bpf?] [net?] KASAN: slab-use-after-free Read in bq_xmit_all Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: general protection fault in __cpu_map_flush Oops: general protection fault, probably for non-canonical address 0xdffffc00248b33c0: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: probably user-memory-access in range [0x0000000124599e00-0x0000000124599e07] CPU: 0 PID: 8590 Comm: syz.0.1336 Not tainted 6.10.0-syzkaller-11185-g2c9b3512402e-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:__cpu_map_flush+0x42/0xd0 Code: e8 83 d9 d6 ff 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 bd ce 39 00 49 8b 1e 4c 39 f3 74 77 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 9f ce 39 00 4c 8b 23 48 8d 7b c0 RSP: 0018:ffffc90000007b10 EFLAGS: 00010206 RAX: 00000000248b33c0 RBX: 0000000124599e00 RCX: ffff888024599e00 RDX: 0000000080000101 RSI: 0000000000000010 RDI: ffffc900041d7800 RBP: dffffc0000000000 R08: ffffffff895fbdfa R09: 1ffffffff1f5d13d R10: dffffc0000000000 R11: fffffbfff1f5d13e R12: ffffc900041d7800 R13: ffffc900041d7820 R14: ffffc900041d7800 R15: dffffc0000000000 FS: 00007feec5f366c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007feec5306030 CR3: 0000000022d0e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> xdp_do_check_flushed+0x136/0x240 net/core/filter.c:4304 __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 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5062 Code: c9 50 e8 19 b6 0b 00 48 83 c4 08 4c 89 f7 e8 7d 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 50 1b 2e 0a e8 8b f2 36 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc RSP: 0018:ffffc900041d77a8 EFLAGS: 00000286 RAX: b5a136e6a96a7500 RBX: ffff888024599e00 RCX: ffffffff947c8703 RDX: dffffc0000000000 RSI: ffffffff8bcacd20 RDI: ffffffff8c1f9a40 RBP: ffffc900041d77f0 R08: ffffffff8fae89ef R09: 1ffffffff1f5d13d R10: dffffc0000000000 R11: fffffbfff1f5d13e R12: 1ffff11017287eb3 R13: dffffc0000000000 R14: ffff8880b943e800 R15: ffff8880b943f598 context_switch kernel/sched/core.c:5191 [inline] __schedule+0x17b6/0x4a10 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 futex_wait_queue+0x14e/0x1d0 kernel/futex/waitwake.c:370 __futex_wait+0x17f/0x320 kernel/futex/waitwake.c:669 futex_wait+0x101/0x360 kernel/futex/waitwake.c:697 do_futex+0x33b/0x560 kernel/futex/syscalls.c:102 __do_sys_futex kernel/futex/syscalls.c:179 [inline] __se_sys_futex+0x3f9/0x480 kernel/futex/syscalls.c:160 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: 0033:0x7feec5175b59 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:00007feec5f360f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007feec5305f68 RCX: 00007feec5175b59 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007feec5305f68 RBP: 00007feec5305f60 R08: 00007feec5f366c0 R09: 00007feec5f366c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007feec5305f6c R13: 000000000000000b R14: 00007ffc29b39510 R15: 00007ffc29b395f8 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__cpu_map_flush+0x42/0xd0 Code: e8 83 d9 d6 ff 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 bd ce 39 00 49 8b 1e 4c 39 f3 74 77 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 9f ce 39 00 4c 8b 23 48 8d 7b c0 RSP: 0018:ffffc90000007b10 EFLAGS: 00010206 RAX: 00000000248b33c0 RBX: 0000000124599e00 RCX: ffff888024599e00 RDX: 0000000080000101 RSI: 0000000000000010 RDI: ffffc900041d7800 RBP: dffffc0000000000 R08: ffffffff895fbdfa R09: 1ffffffff1f5d13d R10: dffffc0000000000 R11: fffffbfff1f5d13e R12: ffffc900041d7800 R13: ffffc900041d7820 R14: ffffc900041d7800 R15: dffffc0000000000 FS: 00007feec5f366c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007feec5306030 CR3: 0000000022d0e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e8 83 d9 d6 ff call 0xffd6d988 5: 4c 89 f0 mov %r14,%rax 8: 48 c1 e8 03 shr $0x3,%rax c: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) 11: 74 08 je 0x1b 13: 4c 89 f7 mov %r14,%rdi 16: e8 bd ce 39 00 call 0x39ced8 1b: 49 8b 1e mov (%r14),%rbx 1e: 4c 39 f3 cmp %r14,%rbx 21: 74 77 je 0x9a 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 9f ce 39 00 call 0x39ced8 39: 4c 8b 23 mov (%rbx),%r12 3c: 48 8d 7b c0 lea -0x40(%rbx),%rdi 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=14ac4595980000 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 patch: https://syzkaller.appspot.com/x/patch.diff?x=154c8cad980000
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