[syzbot] [bpf?] [net?] general protection fault in bq_flush_to_queue

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 28bbe4ea686a Merge tag 'i2c-for-6.11-rc1-second-batch' of ..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16ab4e19980000
kernel config: https://syzkaller.appspot.com/x/.config?x=9d240b438cabdc8e
dashboard link: https://syzkaller.appspot.com/bug?extid=3c2b6d5d4bec3b904933
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/a6bb49754efa/disk-28bbe4ea.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/68010035620f/vmlinux-28bbe4ea.xz
kernel image: https://storage.googleapis.com/syzbot-assets/739b01ffb241/bzImage-28bbe4ea.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3c2b6d...@syzkaller.appspotmail.com

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 9319 Comm: syz.4.1011 Not tainted 6.10.0-syzkaller-12084-g28bbe4ea686a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:bq_flush_to_queue+0x44/0x610 kernel/bpf/cpumap.c:675
Code: df e8 40 d8 d6 ff 49 8d 5e 50 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 f6 e8 3a 00 48 8b 2b 48 89 e8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 1d 05 00 00 44 8b 65 00 4d 8d 6e 58 4c
RSP: 0018:ffffc90000a18a80 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8880789a4290 RCX: ffff88801ab78000
RDX: 0000000000000100 RSI: 0000000000000010 RDI: ffff8880789a4240
RBP: 0000000000000000 R08: ffffffff896117da R09: 1ffffffff1f5cf4d
R10: dffffc0000000000 R11: fffffbfff1f5cf4e R12: 0000000000000001
R13: ffffc9000d1af820 R14: ffff8880789a4240 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f20312356b8 CR3: 0000000079b12000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
__cpu_map_flush+0x5d/0xd0 kernel/bpf/cpumap.c:767
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
common_interrupt+0xaa/0xd0 arch/x86/kernel/irq.c:278
</IRQ>
<TASK>
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0010:rcu_preempt_read_enter kernel/rcu/tree_plugin.h:389 [inline]
RIP: 0010:__rcu_read_lock+0x30/0xb0 kernel/rcu/tree_plugin.h:412
Code: 57 41 56 53 49 be 00 00 00 00 00 fc ff df 65 4c 8b 3c 25 00 d7 03 00 49 81 c7 44 04 00 00 4c 89 fb 48 c1 eb 03 42 0f b6 04 33 <84> c0 75 35 41 8b 2f ff c5 42 0f b6 04 33 84 c0 75 3e 41 89 2f 42
RSP: 0018:ffffc9000d1af6b0 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: 1ffff1100356f088 RCX: ffffffff81701eba
RDX: dffffc0000000000 RSI: ffffffff8bcad5a0 RDI: ffff88801f942780
RBP: ffff88813fffa000 R08: ffffffff92fcd837 R09: 1ffffffff25f9b06
R10: dffffc0000000000 R11: fffffbfff25f9b07 R12: 1ffff11002bddf93
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88801ab78444
rcu_read_lock include/linux/rcupdate.h:836 [inline]
percpu_ref_put_many include/linux/percpu-refcount.h:330 [inline]
percpu_ref_put+0x12/0x180 include/linux/percpu-refcount.h:351
obj_cgroup_put include/linux/memcontrol.h:802 [inline]
__memcg_slab_free_hook+0xa7/0x310 mm/memcontrol.c:3050
memcg_slab_free_hook mm/slub.c:2186 [inline]
slab_free mm/slub.c:4470 [inline]
kmem_cache_free+0x1cf/0x350 mm/slub.c:4548
vma_lock_free kernel/fork.c:457 [inline]
__vm_area_free+0xe0/0x110 kernel/fork.c:513
remove_vma mm/mmap.c:187 [inline]
exit_mmap+0x645/0xc80 mm/mmap.c:3406
__mmput+0x115/0x380 kernel/fork.c:1345
exit_mm+0x220/0x310 kernel/exit.c:571
do_exit+0x9b2/0x27f0 kernel/exit.c:869
do_group_exit+0x207/0x2c0 kernel/exit.c:1031
get_signal+0x1695/0x1730 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: 0033:0x7fd3c9775f19
Code: Unable to access opcode bytes at 0x7fd3c9775eef.
RSP: 002b:00007fd3ca6110f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fd3c9905f68 RCX: 00007fd3c9775f19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd3c9905f68
RBP: 00007fd3c9905f60 R08: 00007fd3ca6116c0 R09: 00007fd3ca6116c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd3c9905f6c
R13: 000000000000000b R14: 00007ffc73d12a30 R15: 00007ffc73d12b18
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bq_flush_to_queue+0x44/0x610 kernel/bpf/cpumap.c:675
Code: df e8 40 d8 d6 ff 49 8d 5e 50 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 f6 e8 3a 00 48 8b 2b 48 89 e8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 1d 05 00 00 44 8b 65 00 4d 8d 6e 58 4c
RSP: 0018:ffffc90000a18a80 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8880789a4290 RCX: ffff88801ab78000
RDX: 0000000000000100 RSI: 0000000000000010 RDI: ffff8880789a4240
RBP: 0000000000000000 R08: ffffffff896117da R09: 1ffffffff1f5cf4d
R10: dffffc0000000000 R11: fffffbfff1f5cf4e R12: 0000000000000001
R13: ffffc9000d1af820 R14: ffff8880789a4240 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f20312356b8 CR3: 0000000079b12000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: df e8 fucomip %st(0),%st
2: 40 d8 d6 rex fcom %st(6)
5: ff 49 8d decl -0x73(%rcx)
8: 5e pop %rsi
9: 50 push %rax
a: 48 89 d8 mov %rbx,%rax
d: 48 c1 e8 03 shr $0x3,%rax
11: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
16: 74 08 je 0x20
18: 48 89 df mov %rbx,%rdi
1b: e8 f6 e8 3a 00 call 0x3ae916
20: 48 8b 2b mov (%rbx),%rbp
23: 48 89 e8 mov %rbp,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 1d 05 00 00 jne 0x554
37: 44 8b 65 00 mov 0x0(%rbp),%r12d
3b: 4d 8d 6e 58 lea 0x58(%r14),%r13
3f: 4c rex.WR


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