kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 27461 Comm: syz-executor.0 Not tainted 4.9.172+ #50 task: 000000003512a8c5 task.stack: 0000000030695dfe RIP: 0010:[] [<000000008717bd99>] perf_event_count kernel/events/core.c:3583 [inline] RIP: 0010:[] [<000000008717bd99>] perf_output_read_group kernel/events/core.c:5742 [inline] RIP: 0010:[] [<000000008717bd99>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779 RSP: 0018:ffff8801599eeff8 EFLAGS: 00010207 RAX: 000000000000001b RBX: 0000000000000006 RCX: ffffc90007565000 RDX: 0000000000040000 RSI: ffffffff813c0360 RDI: 00000000000000de RBP: ffff8801599ef170 R08: 1ffff10038f04761 R09: ffffed0038f04763 R10: ffffed0038f04762 R11: ffff8801c7823b17 R12: ffff8801c8c4f2c8 R13: ffff8801599ef308 R14: dffffc0000000000 R15: ffff8801c8c4f250 FS: 00007f32bd51d700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002077513f CR3: 00000001c52b1000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Stack: ffff8801599ef0e0 ffff8801599ef310 ffffed002b33de62 0000000000000010 0000000000000004 0000000000000010 ffffed002b33de65 1ffff1002b33de0d ffff8801c50a88a0 ffff8801599ef328 ffff8801599ef320 ffff8801599ef0d8 Call Trace: [<00000000ac184af7>] perf_output_sample+0x1142/0x17e0 kernel/events/core.c:5821 [<000000007ee76195>] __perf_event_output kernel/events/core.c:6093 [inline] [<000000007ee76195>] perf_event_output_forward+0x129/0x240 kernel/events/core.c:6106 [<00000000227233d6>] __perf_event_overflow+0x121/0x330 kernel/events/core.c:7208 [<00000000d1385d1e>] perf_swevent_overflow+0x17c/0x210 kernel/events/core.c:7284 [<000000006d60aede>] perf_swevent_event+0x1ac/0x280 kernel/events/core.c:7317 [<000000006b86ba31>] do_perf_sw_event kernel/events/core.c:7425 [inline] [<000000006b86ba31>] ___perf_sw_event+0x299/0x4c0 kernel/events/core.c:7456 [<0000000065af9629>] __perf_sw_event+0x47/0x90 kernel/events/core.c:7468 [<000000007b665649>] perf_sw_event include/linux/perf_event.h:1045 [inline] [<000000007b665649>] __do_page_fault+0x6cd/0xa60 arch/x86/mm/fault.c:1447 [<000000002a92bb63>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1469 [<00000000555bf11b>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:951 [<00000000191d9d47>] generic_perform_write+0x1b6/0x500 mm/filemap.c:2929 [<000000003229a283>] __generic_file_write_iter+0x340/0x530 mm/filemap.c:3064 [<00000000949e9472>] ext4_file_write_iter+0x66e/0xdd0 fs/ext4/file.c:165 [<00000000c647316a>] new_sync_write fs/read_write.c:498 [inline] [<00000000c647316a>] __vfs_write+0x3c1/0x560 fs/read_write.c:511 [<00000000a2de6f65>] vfs_write+0x185/0x520 fs/read_write.c:559 [<000000000df371a6>] SYSC_write fs/read_write.c:606 [inline] [<000000000df371a6>] SyS_write+0xdc/0x1c0 fs/read_write.c:598 [<0000000053d49d10>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285 [<00000000b1c2df63>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: 74 08 3c 03 0f 8e 55 0a 00 00 41 83 bf 88 00 00 00 01 0f 84 09 07 00 00 e8 90 ce f5 ff 48 8d bb d8 00 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 15 0a 00 00 48 8b 9b d8 00 00 00 48 85 db RIP [<000000008717bd99>] perf_event_count kernel/events/core.c:3583 [inline] RIP [<000000008717bd99>] perf_output_read_group kernel/events/core.c:5742 [inline] RIP [<000000008717bd99>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779 RSP ---[ end trace 986e1958e27a4ef5 ]---