KASAN: slab-out-of-bounds Write in check_noncircular
From: syzbot <hidden>
Date: 2019-07-19 05:48:09
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Hello, syzbot found the following crash on: HEAD commit: 22051d9c Merge tag 'platform-drivers-x86-v5.3-2' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14090a34600000 kernel config: https://syzkaller.appspot.com/x/.config?x=135cb826ac59d7fc dashboard link: https://syzkaller.appspot.com/bug?extid=e2416b38b581ad58bc1e compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1397afe0600000 The bug was bisected to: commit e9db4ef6bf4ca9894bb324c76e01b8f1a16b2650 Author: John Fastabend [off-list ref] Date: Sat Jun 30 13:17:47 2018 +0000 bpf: sockhash fix omitted bucket lock in sock_close bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=131928f4600000 final crash: https://syzkaller.appspot.com/x/report.txt?x=109928f4600000 console output: https://syzkaller.appspot.com/x/log.txt?x=171928f4600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+e2416b38b581ad58bc1e@syzkaller.appspotmail.com Fixes: e9db4ef6bf4c ("bpf: sockhash fix omitted bucket lock in sock_close") ================================================================== BUG: KASAN: slab-out-of-bounds in check_noncircular+0x91/0x560 /kernel/locking/lockdep.c:1722 Write of size 56 at addr ffff88809752a1a0 by task syz-executor.2/9504 CPU: 1 PID: 9504 Comm: syz-executor.2 Not tainted 5.2.0+ #34 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Allocated by task 2258096832: ------------[ cut here ]------------ kernel BUG at mm/slab.c:4179! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 9504 Comm: syz-executor.2 Not tainted 5.2.0+ #34 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__check_heap_object+0xcb/0xd0 /mm/slab.c:4203 Code: 4c 89 d1 4d 89 c8 e8 34 a6 07 00 5b 41 5e 5d c3 49 8b 73 58 41 0f b6 d0 48 c7 c7 0f eb 7e 88 4c 89 d1 4d 89 c8 e8 d5 a6 07 00 <0f> 0b 0f 1f 00 55 48 89 e5 53 48 83 ff 10 0f 84 90 00 00 00 48 85 RSP: 0018:ffff8880975297a0 EFLAGS: 00010046 RAX: 0000000000000fc5 RBX: 00000000000011e0 RCX: 000000000000000c RDX: 000000000000000c RSI: 0000000000000002 RDI: 0000000000000001 RBP: ffff8880975297b0 R08: 0000000000000000 R09: fffff940004ba941 R10: ffff8880975298a0 R11: ffff8880aa5918c0 R12: ffff8880975298a2 R13: 01fffc0000010200 R14: ffff8880975286c0 R15: ffff8880975298a0 FS: 0000555556816940(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8aff8f88 CR3: 000000008586d000 CR4: 00000000001406e0 Call Trace: Modules linked in: ---[ end trace 35842f070e95906d ]--- RIP: 0010:__check_heap_object+0xcb/0xd0 /mm/slab.c:4203 Code: 4c 89 d1 4d 89 c8 e8 34 a6 07 00 5b 41 5e 5d c3 49 8b 73 58 41 0f b6 d0 48 c7 c7 0f eb 7e 88 4c 89 d1 4d 89 c8 e8 d5 a6 07 00 <0f> 0b 0f 1f 00 55 48 89 e5 53 48 83 ff 10 0f 84 90 00 00 00 48 85 RSP: 0018:ffff8880975297a0 EFLAGS: 00010046 RAX: 0000000000000fc5 RBX: 00000000000011e0 RCX: 000000000000000c RDX: 000000000000000c RSI: 0000000000000002 RDI: 0000000000000001 RBP: ffff8880975297b0 R08: 0000000000000000 R09: fffff940004ba941 R10: ffff8880975298a0 R11: ffff8880aa5918c0 R12: ffff8880975298a2 R13: 01fffc0000010200 R14: ffff8880975286c0 R15: ffff8880975298a0 FS: 0000555556816940(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8aff8f88 CR3: 000000008586d000 CR4: 00000000001406e0 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches