usercopy: Kernel memory exposure attempt detected from SLAB object 'kmalloc-512' (offset 628, size 143)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:100! invalid opcode: 0000 [#1] SMP KASAN CPU: 0 PID: 28160 Comm: syz-executor7 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:ffff8801969579a8 EFLAGS: 00010286 RAX: 0000000000000068 RBX: ffffffff88c08be0 RCX: ffffc90007c53000 RDX: 0000000000000000 RSI: ffffffff81631851 RDI: 0000000000000001 RBP: ffff880196957a00 R08: ffff88019af16740 R09: ffffed003b5c4fc0 R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: ffffffff87f34080 R13: ffffffff87f33f40 R14: ffffffff87f33f00 R15: ffffffff88c046df FS: 00007f24345f0700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7a403ea000 CR3: 00000001ce8bd000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000020000000 DR3: 0000000020000000 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:00007f24345efc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f24345f06d4 RCX: 0000000000455ab9 RDX: 0000000000000028 RSI: 0000000020000080 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-11982 0...2 97874731us : 0: }D syz-exec-11982 0...2 97874741us : 0: }D syz-exec-11982 0...2 97874744us : 0: }D syz-exec-11982 0...2 97874747us : 0: }D syz-exec-11982 0...2 97874749us : 0: }D syz-exec-11982 0...2 97874752us : 0: }D syz-exec-11982 0...2 97874755us : 0: }D syz-exec-11982 0...2 97874757us : 0: }D syz-exec-11982 0...2 97874759us : 0: }D syz-exec-11982 0...2 97874762us : 0: }D syz-exec-11982 0...2 97874764us : 0: }D syz-exec-11982 0...2 97874766us : 0: }D syz-exec-11982 0...2 97874768us : 0: }D syz-exec-11982 0...2 97874771us : 0: }D syz-exec-11982 0...2 97874773us : 0: }D syz-exec-11982 0...2 97874776us : 0: }D syz-exec-11982 0...2 97874779us : 0: }D syz-exec-11982 0...2 97874782us : 0: }D syz-exec-11982 0...2 97874784us : 0: }D syz-exec-11982 0...2 97874787us : 0: }D syz-exec-11982 0...2 97874790us : 0: }D syz-exec-11982 0...2 97874792us : 0: }D syz-exec-11982 0...2 97874794us : 0: }D syz-exec-11982 0...2 97874796us : 0: }D syz-exec-11982 0...2 97874799us : 0: }D syz-exec-11982 0...2 97874801us : 0: }D syz-exec-11982 0...2 97874803us : 0: }D syz-exec-11982 0...2 97874806us : 0: }D syz-exec-11982 0...2 97874809us : 0: }D syz-exec-11982 0...2 97874811us : 0: }D syz-exec-11982 0...2 97874814us : 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0: }D syz-exec-11982 0...2 97876438us : 0: }D syz-exec-11982 0...2 97876440us : 0: }D syz-exec-11982 0...2 97876442us : 0: }D syz-exec-11982 0...2 97876444us : 0: }D syz-exec-11982 0...2 97876447us : 0: }D syz-exec-11982 0...2 97876449us : 0: }D syz-exec-11982 0...2 97876451us : 0: }D syz-exec-11982 0...2 97876454us : 0: }D syz-exec-11982 0...2 97876457us : 0: }D syz-exec-11982 0...2 97876459us : 0: }D syz-exec-11982 0...2 97876462us : 0: }D syz-exec-11982 0...2 97876465us : 0: }D syz-exec-11982 0...2 97876467us : 0: }D syz-exec-11982 0...2 97876470us : 0: }D syz-exec-11982 0...2 97876472us : 0: }D syz-exec-11982 0...2 97876475us : 0: }D syz-exec-11982 0...2 97876477us : 0: }D syz-exec-11982 0...2 97876479us : 0: }D syz-exec-11982 0...2 97876481us : 0: }D syz-exec-11982 0...2 97876483us : 0: }D syz-exec-11982 0...2 97876485us : 0: }D syz-exec-11982 0...2 97876488us : 0: }D syz-exec-11982 0...2 97876490us : 0: }D syz-exec-11982 0...2 97876492us : 0: }D syz-exec-11982 0...2 97876494us : 0: }D syz-exec-11982 0...2 97876496us : 0: }D syz-exec-11982 0...2 97876498us : 0: }D syz-exec-11982 0...2 97876501us : 0: }D syz-exec-11982 0...2 97876503us : 0: }D syz-exec-11982 0...2 97876506us : 0: }D syz-exec-11982 0...2 97876508us : 0: }D syz-exec-11982 0...2 97876511us : 0: }D syz-exec-11982 0...2 97876513us : 0: }D syz-exec-11982 0...2 97876515us : 0: }D syz-exec-11982 0...2 97876517us : 0: }D syz-exec-11982 0...2 97876519us : 0: }D syz-exec-11982 0...2 97876522us : 0: }D syz-exec-11982 0...2 97876524us : 0: }D syz-exec-11982 0...2 97876527us : 0: }D syz-exec-11982 0...2 97876529us : 0: }D syz-exec-11982 0...2 97876531us : 0: }D syz-exec-11982 0...2 97876533us : 0: }D syz-exec-11982 0...2 97876535us : 0: }D syz-exec-11982 0...2 97876537us : 0: }D syz-exec-11982 0...2 97876540us : 0: }D syz-exec-11982 0...2 97876542us : 0: }D syz-exec-11982 0...2 97876544us : 0: }D syz-exec-11982 0...2 97876547us : 0: }D syz-exec-11982 0...2 97876549us : 0: }D syz-exec-11982 0...2 97876551us : 0: }D syz-exec-11982 0...2 97876554us : 0: }D syz-exec-11982 0...2 97876556us : 0: }D syz-exec-11982 0...2 97876559us : 0: }D syz-exec-11982 0...2 97876561us : 0: }D syz-exec-11982 0...2 97876563us : 0: }D syz-exec-11982 0...2 97876565us : 0: }D syz-exec-11982 0...2 97876568us : 0: }D syz-exec-11982 0...2 97876570us : 0: }D syz-exec-11982 0...2 97876573us : 0: }D syz-exec-11982 0...2 97876575us : 0: }D syz-exec-11982 0...2 97876577us : 0: }D syz-exec-11982 0...2 97876580us : 0: }D --------------------------------- ---[ end trace 9bd3f82b3a78c684 ]--- 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:ffff8801969579a8 EFLAGS: 00010286 RAX: 0000000000000068 RBX: ffffffff88c08be0 RCX: ffffc90007c53000 RDX: 0000000000000000 RSI: ffffffff81631851 RDI: 0000000000000001 RBP: ffff880196957a00 R08: ffff88019af16740 R09: ffffed003b5c4fc0 R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: ffffffff87f34080 R13: ffffffff87f33f40 R14: ffffffff87f33f00 R15: ffffffff88c046df FS: 00007f24345f0700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7a403ea000 CR3: 00000001ce8bd000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000020000000 DR3: 0000000020000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600