Oops: general protection fault, probably for non-canonical address 0xdffffc0000000080: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000400-0x0000000000000407] CPU: 1 UID: 0 PID: 10581 Comm: syz.0.1493 Not tainted 6.11.0-rc1-next-20240729-syzkaller #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 07 c3 3e 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 d5 c2 3e 00 48 8b 03 48 89 44 RSP: 0018:ffffc90000a18af0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000400 RCX: ffff888065508000 RDX: 0000000080000100 RSI: 0000000000000010 RDI: ffffc90009ea71b0 RBP: ffffc90009ea71b0 R08: ffffffff8992425a R09: 1ffffffff202faed R10: dffffc0000000000 R11: fffffbfff202faee R12: 0000000000000000 R13: 0000000000000080 R14: 0000000000000010 R15: ffffc90009ea71b0 FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 00000000231f0000 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:4307 __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 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 RIP: 0010:obj_cgroup_uncharge_pages+0x14e/0x200 mm/memcontrol.c:2639 Code: 00 9c 8f 44 24 40 42 80 3c 2b 00 74 05 e8 3a dd f7 ff f6 44 24 41 02 0f 85 82 00 00 00 41 f7 c7 00 02 00 00 74 01 fb 4c 89 e7 <8b> 74 24 1c e8 b9 e3 ff ff 49 8d 5c 24 54 48 89 d8 48 c1 e8 03 42 RSP: 0018:ffffc90009ea7980 EFLAGS: 00000206 RAX: 048134cb06601000 RBX: 1ffff920013d4f38 RCX: ffffffff94f2f903 RDX: dffffc0000000000 RSI: ffffffff8c0ad560 RDI: ffff888062f3e000 RBP: ffffc90009ea7a50 R08: ffffffff9017d76f R09: 1ffffffff202faed R10: dffffc0000000000 R11: fffffbfff202faee R12: ffff888062f3e000 R13: dffffc0000000000 R14: 1ffff920013d4f34 R15: 0000000000000246 __memcg_kmem_uncharge_page+0xe9/0x290 mm/memcontrol.c:2713 memcg_kmem_uncharge_page include/linux/memcontrol.h:1708 [inline] exit_task_stack_account+0x94/0x340 kernel/fork.c:567 do_exit+0x1d02/0x27f0 kernel/exit.c:923 do_group_exit+0x207/0x2c0 kernel/exit.c:1031 get_signal+0x16a1/0x1740 kernel/signal.c:2917 arch_do_signal_or_restart+0x96/0x830 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: 0033:0x7feafd7773b9 Code: Unable to access opcode bytes at 0x7feafd77738f. RSP: 002b:00007feafe56e0f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007feafd905f88 RCX: 00007feafd7773b9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007feafd905f88 RBP: 00007feafd905f80 R08: 00007feafe56e6c0 R09: 00007feafe56e6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007feafd905f8c R13: 000000000000000b R14: 00007ffd946068d0 R15: 00007ffd946069b8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__dev_flush+0x5b/0x160 Code: 48 89 ef e8 07 c3 3e 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 d5 c2 3e 00 48 8b 03 48 89 44 RSP: 0018:ffffc90000a18af0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000400 RCX: ffff888065508000 RDX: 0000000080000100 RSI: 0000000000000010 RDI: ffffc90009ea71b0 RBP: ffffc90009ea71b0 R08: ffffffff8992425a R09: 1ffffffff202faed R10: dffffc0000000000 R11: fffffbfff202faee R12: 0000000000000000 R13: 0000000000000080 R14: 0000000000000010 R15: ffffc90009ea71b0 FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 00000000231f0000 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 07 c3 3e 00 call 0x3ec30f 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 d5 c2 3e 00 call 0x3ec30f 3a: 48 8b 03 mov (%rbx),%rax 3d: 48 rex.W 3e: 89 .byte 0x89 3f: 44 rex.R