usercopy: Kernel memory exposure attempt detected from SLAB object 'kmalloc-1024' (offset 1140, size 279)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:100! invalid opcode: 0000 [#1] SMP KASAN CPU: 0 PID: 12021 Comm: syz-executor2 Not tainted 4.18.0-rc3+ #58 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:88 Code: c0 e8 57 6c b9 ff ff 75 c8 48 8b 55 c0 4d 89 f9 ff 75 d0 4d 89 e8 48 89 d9 4c 89 e6 41 56 48 c7 c7 a0 41 f3 87 e8 b7 63 a0 ff <0f> 0b e8 2c 6c b9 ff e8 27 7e f7 ff 4c 89 e1 8b 95 14 ff ff ff 31 RSP: 0018:ffff88019d1679a8 EFLAGS: 00010286 RAX: 000000000000006a RBX: ffffffff88c08be0 RCX: ffffc90007851000 RDX: 0000000000000000 RSI: ffffffff81631851 RDI: 0000000000000001 RBP: ffff88019d167a00 R08: ffff88019e2ea6c0 R09: ffffed003b5c4fc0 R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: ffffffff87f34080 R13: ffffffff87f33f40 R14: ffffffff87f33f00 R15: ffffffff88c046eb FS: 00007f49d85c7700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33b21000 CR3: 00000001cb98c000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __check_heap_object+0xb5/0xb5 mm/slab.c:4445 check_heap_object mm/usercopy.c:236 [inline] __check_object_size+0x4db/0x5f2 mm/usercopy.c:259 check_object_size include/linux/thread_info.h:119 [inline] check_copy_size include/linux/thread_info.h:150 [inline] copy_to_user include/linux/uaccess.h:154 [inline] bpf_test_finish.isra.7+0xd9/0x1f0 net/bpf/test_run.c:59 bpf_prog_test_run_skb+0x7d7/0xa30 net/bpf/test_run.c:144 bpf_prog_test_run+0x130/0x1a0 kernel/bpf/syscall.c:1686 __do_sys_bpf kernel/bpf/syscall.c:2323 [inline] __se_sys_bpf kernel/bpf/syscall.c:2267 [inline] __x64_sys_bpf+0x3d8/0x510 kernel/bpf/syscall.c:2267 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455ab9 Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f49d85c6c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f49d85c76d4 RCX: 0000000000455ab9 RDX: 0000000000000028 RSI: 0000000020000280 RDI: 000000000000000a RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bb71f R14: 00000000004c8b00 R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: --------------------------------- syz-exec-8004 0...2 62414951us : 0: }D syz-exec-8004 0...2 62414957us : 0: }D syz-exec-8004 0...2 62414960us : 0: }D syz-exec-8004 0...2 62414962us : 0: }D syz-exec-8004 0...2 62414965us : 0: }D syz-exec-8004 0...2 62414968us : 0: }D 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62415033us : 0: }D syz-exec-8004 0...2 62415035us : 0: }D syz-exec-8004 0...2 62415038us : 0: }D syz-exec-8004 0...2 62415040us : 0: }D syz-exec-8004 0...2 62415043us : 0: }D syz-exec-8004 0...2 62415045us : 0: }D syz-exec-8004 0...2 62415048us : 0: }D syz-exec-8004 0...2 62415050us : 0: }D syz-exec-8004 0...2 62415053us : 0: }D syz-exec-8004 0...2 62415055us : 0: }D syz-exec-8004 0...2 62415057us : 0: }D syz-exec-8004 0...2 62415059us : 0: }D syz-exec-8004 0...2 62415061us : 0: }D syz-exec-8004 0...2 62415063us : 0: }D syz-exec-8004 0...2 62415065us : 0: }D syz-exec-8004 0...2 62415068us : 0: }D syz-exec-8004 0...2 62415070us : 0: }D syz-exec-8004 0...2 62415072us : 0: }D syz-exec-8004 0...2 62415075us : 0: }D syz-exec-8004 0...2 62415077us : 0: }D syz-exec-8004 0...2 62415080us : 0: }D syz-exec-8004 0...2 62415082us : 0: }D syz-exec-8004 0...2 62415084us : 0: }D syz-exec-8004 0...2 62415095us : 0: }D syz-exec-8004 0...2 62415098us : 0: }D syz-exec-8004 0...2 62415101us : 0: }D 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62415169us : 0: }D syz-exec-8004 0...2 62415172us : 0: }D syz-exec-8004 0...2 62415174us : 0: }D syz-exec-8004 0...2 62415177us : 0: }D syz-exec-8004 0...2 62415180us : 0: }D syz-exec-8004 0...2 62415182us : 0: }D syz-exec-8004 0...2 62415184us : 0: }D syz-exec-8004 0...2 62415186us : 0: }D syz-exec-8004 0...2 62415189us : 0: }D syz-exec-8004 0...2 62415192us : 0: }D syz-exec-8004 0...2 62415194us : 0: }D syz-exec-8004 0...2 62415197us : 0: }D syz-exec-8004 0...2 62415200us : 0: }D syz-exec-8004 0...2 62415202us : 0: }D syz-exec-8004 0...2 62415204us : 0: }D syz-exec-8004 0...2 62415206us : 0: }D syz-exec-8004 0...2 62415209us : 0: }D syz-exec-8004 0...2 62415211us : 0: }D syz-exec-8004 0...2 62415214us : 0: }D syz-exec-8004 0...2 62415216us : 0: }D syz-exec-8004 0...2 62415219us : 0: }D syz-exec-8004 0...2 62415221us : 0: }D syz-exec-8004 0...2 62415223us : 0: }D syz-exec-8004 0...2 62415226us : 0: }D syz-exec-8004 0...2 62415228us : 0: }D syz-exec-8004 0...2 62415231us : 0: }D 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62415333us : 0: }D syz-exec-8004 0...2 62415335us : 0: }D syz-exec-8004 0...2 62415338us : 0: }D syz-exec-8004 0...2 62415340us : 0: }D syz-exec-8004 0...2 62415342us : 0: }D syz-exec-8004 0...2 62415344us : 0: }D syz-exec-8004 0...2 62415347us : 0: }D syz-exec-8004 0...2 62415350us : 0: }D syz-exec-8004 0...2 62415352us : 0: }D syz-exec-8004 0...2 62415354us : 0: }D syz-exec-8004 0...2 62415358us : 0: }D syz-exec-8004 0...2 62415360us : 0: }D syz-exec-8004 0...2 62415363us : 0: }D syz-exec-8004 0...2 62415365us : 0: }D syz-exec-8004 0...2 62415368us : 0: }D syz-exec-8004 0...2 62415370us : 0: }D syz-exec-8004 0...2 62415373us : 0: }D syz-exec-8004 0...2 62415376us : 0: }D syz-exec-8004 0...2 62415378us : 0: }D syz-exec-8004 0...2 62415381us : 0: }D syz-exec-8004 0...2 62415383us : 0: }D syz-exec-8004 0...2 62415387us : 0: }D syz-exec-8004 0...2 62415390us : 0: }D syz-exec-8004 0...2 62415392us : 0: }D syz-exec-8004 0...2 62415395us : 0: }D syz-exec-8004 0...2 62415398us : 0: }D 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62415608us : 0: }D syz-exec-8004 0...2 62415611us : 0: }D syz-exec-8004 0...2 62415614us : 0: }D syz-exec-8004 0...2 62415616us : 0: }D syz-exec-8004 0...2 62415619us : 0: }D syz-exec-8004 0...2 62415622us : 0: }D syz-exec-8004 0...2 62415625us : 0: }D syz-exec-8004 0...2 62415627us : 0: }D syz-exec-8004 0...2 62415630us : 0: }D syz-exec-8004 0...2 62415633us : 0: }D syz-exec-8004 0...2 62415635us : 0: }D syz-exec-8004 0...2 62415638us : 0: }D syz-exec-8004 0...2 62415641us : 0: }D syz-exec-8004 0...2 62415643us : 0: }D syz-exec-8004 0...2 62415646us : 0: }D syz-exec-8004 0...2 62415649us : 0: }D syz-exec-8004 0...2 62415652us : 0: }D syz-exec-8004 0...2 62415654us : 0: }D syz-exec-8004 0...2 62415657us : 0: }D syz-exec-8004 0...2 62415660us : 0: }D syz-exec-8004 0...2 62415662us : 0: }D syz-exec-8004 0...2 62415665us : 0: }D syz-exec-8004 0...2 62415668us : 0: }D syz-exec-8004 0...2 62415670us : 0: }D syz-exec-8004 0...2 62415673us : 0: }D syz-exec-8004 0...2 62415676us : 0: }D 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62415882us : 0: }D syz-exec-8004 0.N.2 62415915us : 0: }D syz-exec-8004 0...2 62436212us : 0: }D syz-exec-8004 0...2 62436218us : 0: }D syz-exec-8004 0...2 62436221us : 0: }D syz-exec-8004 0...2 62436225us : 0: }D syz-exec-8004 0...2 62436227us : 0: }D syz-exec-8004 0...2 62436230us : 0: }D syz-exec-8004 0...2 62436232us : 0: }D syz-exec-8004 0...2 62436236us : 0: }D syz-exec-8004 0...2 62436238us : 0: }D syz-exec-8004 0...2 62436240us : 0: }D syz-exec-8004 0...2 62436243us : 0: }D syz-exec-8004 0...2 62436246us : 0: }D syz-exec-8004 0...2 62436249us : 0: }D syz-exec-8004 0...2 62436251us : 0: }D syz-exec-8004 0...2 62436254us : 0: }D syz-exec-8004 0...2 62436257us : 0: }D syz-exec-8004 0...2 62436260us : 0: }D syz-exec-8004 0...2 62436262us : 0: }D syz-exec-8004 0...2 62436265us : 0: }D syz-exec-8004 0...2 62436267us : 0: }D syz-exec-8004 0...2 62436270us : 0: }D syz-exec-8004 0...2 62436273us : 0: }D syz-exec-8004 0...2 62436306us : 0: }D syz-exec-8004 0...2 62436308us : 0: }D 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syz-exec-8004 0...2 62437066us : 0: }D syz-exec-8004 0...2 62437068us : 0: }D syz-exec-8004 0...2 62437070us : 0: }D syz-exec-8004 0...2 62437073us : 0: }D syz-exec-8004 0...2 62437075us : 0: }D syz-exec-8004 0...2 62437077us : 0: }D syz-exec-8004 0...2 62437080us : 0: }D syz-exec-8004 0...2 62437083us : 0: }D syz-exec-8004 0...2 62437095us : 0: }D syz-exec-8004 0...2 62437097us : 0: }D syz-exec-8004 0...2 62437101us : 0: }D syz-exec-8004 0...2 62437104us : 0: }D syz-exec-8004 0...2 62437107us : 0: }D syz-exec-8004 0...2 62437109us : 0: }D syz-exec-8004 0...2 62437112us : 0: }D syz-exec-8004 0...2 62437114us : 0: }D syz-exec-8004 0...2 62437116us : 0: }D syz-exec-8004 0...2 62437118us : 0: }D syz-exec-8004 0...2 62437121us : 0: }D syz-exec-8004 0...2 62437123us : 0: }D syz-exec-8004 0...2 62437125us : 0: }D syz-exec-8004 0...2 62437127us : 0: }D syz-exec-8004 0...2 62437130us : 0: }D syz-exec-8004 0...2 62437132us : 0: }D syz-exec-8004 0...2 62437134us : 0: }D syz-exec-8004 0...2 62437138us : 0: }D syz-exec-8004 0...2 62437140us : 0: }D syz-exec-8004 0...2 62437142us : 0: }D syz-exec-8004 0...2 62437144us : 0: }D syz-exec-8004 0...2 62437148us : 0: }D syz-exec-8004 0...2 62437150us : 0: }D syz-exec-8004 0...2 62437153us : 0: }D syz-exec-8004 0...2 62437155us : 0: }D syz-exec-8004 0...2 62437159us : 0: }D syz-exec-8004 0...2 62437161us : 0: }D syz-exec-8004 0...2 62437164us : 0: }D syz-exec-8004 0...2 62437168us : 0: }D syz-exec-8004 0.N.2 62437170us : 0: }D syz-exec-8004 0...2 62440781us : 0: }D syz-exec-8004 0...2 62440787us : 0: }D syz-exec-8004 0...2 62440790us : 0: }D syz-exec-8004 0...2 62440792us : 0: }D syz-exec-8004 0...2 62440795us : 0: }D syz-exec-8004 0...2 62440798us : 0: }D syz-exec-8004 0...2 62440801us : 0: }D syz-exec-8004 0...2 62440804us : 0: }D syz-exec-8004 0...2 62440806us : 0: }D syz-exec-8004 0...2 62440810us : 0: }D syz-exec-8004 0...2 62440812us : 0: }D syz-exec-8004 0...2 62440815us : 0: }D syz-exec-8004 0...2 62440818us : 0: }D syz-exec-8004 0...2 62440821us : 0: }D syz-exec-8004 0...2 62440824us : 0: }D syz-exec-8004 0...2 62440826us : 0: }D syz-exec-8004 0...2 62440829us : 0: }D syz-exec-8004 0...2 62440832us : 0: }D syz-exec-8004 0...2 62440835us : 0: }D syz-exec-8004 0...2 62440837us : 0: }D syz-exec-8004 0...2 62440841us : 0: }D syz-exec-8004 0...2 62440844us : 0: }D syz-exec-8004 0...2 62440846us : 0: }D syz-exec-8004 0...2 62440849us : 0: }D syz-exec-8004 0...2 62440853us : 0: }D syz-exec-8004 0...2 62440855us : 0: }D syz-exec-8004 0...2 62440858us : 0: }D syz-exec-8004 0...2 62440861us : 0: }D syz-exec-8004 0...2 62440864us : 0: }D syz-exec-8004 0...2 62440867us : 0: }D syz-exec-8004 0...2 62440869us : 0: }D syz-exec-8004 0...2 62440873us : 0: }D syz-exec-8004 0...2 62440876us : 0: }D syz-exec-8004 0...2 62440878us : 0: }D syz-exec-8004 0...2 62440881us : 0: }D syz-exec-8004 0...2 62440884us : 0: }D syz-exec-8004 0...2 62440887us : 0: }D syz-exec-8004 0...2 62440890us : 0: }D syz-exec-8004 0...2 62440893us : 0: }D syz-exec-8004 0...2 62440896us : 0: }D syz-exec-8004 0...2 62440899us : 0: }D syz-exec-8004 0...2 62440901us : 0: }D syz-exec-8004 0...2 62440905us : 0: }D syz-exec-8004 0...2 62440907us : 0: }D syz-exec-8004 0...2 62440910us : 0: }D syz-exec-8004 0...2 62440913us : 0: }D syz-exec-8004 0...2 62440916us : 0: }D syz-exec-8004 0...2 62440919us : 0: }D syz-exec-8004 0...2 62440921us : 0: }D syz-exec-8004 0...2 62440924us : 0: }D syz-exec-8004 0...2 62440927us : 0: }D syz-exec-8004 0...2 62440929us : 0: }D syz-exec-8004 0...2 62440932us : 0: }D syz-exec-8004 0...2 62440935us : 0: }D syz-exec-8004 0...2 62440938us : 0: }D syz-exec-8004 0...2 62440940us : 0: }D syz-exec-8004 0...2 62440943us : 0: }D syz-exec-8004 0...2 62440946us : 0: }D syz-exec-8004 0...2 62440948us : 0: }D syz-exec-8004 0...2 62440951us : 0: }D syz-exec-8004 0...2 62440954us : 0: }D --------------------------------- ---[ end trace e7676a69547aaf92 ]--- RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:88 Code: c0 e8 57 6c b9 ff ff 75 c8 48 8b 55 c0 4d 89 f9 ff 75 d0 4d 89 e8 48 89 d9 4c 89 e6 41 56 48 c7 c7 a0 41 f3 87 e8 b7 63 a0 ff <0f> 0b e8 2c 6c b9 ff e8 27 7e f7 ff 4c 89 e1 8b 95 14 ff ff ff 31 RSP: 0018:ffff88019d1679a8 EFLAGS: 00010286 RAX: 000000000000006a RBX: ffffffff88c08be0 RCX: ffffc90007851000 RDX: 0000000000000000 RSI: ffffffff81631851 RDI: 0000000000000001 RBP: ffff88019d167a00 R08: ffff88019e2ea6c0 R09: ffffed003b5c4fc0 R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: ffffffff87f34080 R13: ffffffff87f33f40 R14: ffffffff87f33f00 R15: ffffffff88c046eb FS: 00007f49d85c7700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33b21000 CR3: 00000001cb98c000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600