BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 5c0da067 P4D 5c0da067 PUD 5cda9067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 3 PID: 10689 Comm: syz-executor.2 Not tainted 5.7.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 RIP: 0010:__read_once_size include/linux/compiler.h:252 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x43/0x60 kernel/kcov.c:202 Code: 24 74 0f 80 e6 01 74 35 8b 90 04 14 00 00 85 d2 74 2b 8b 90 e0 13 00 00 83 fa 02 75 20 48 8b 88 e8 13 00 00 8b 80 e4 13 00 00 <48> 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 66 0f RSP: 0018:ffffc90002457f20 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000010 RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff8100b3dd RDI: 0000000000000007 RBP: ffffc90002457f58 R08: ffff88805d0203c0 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff8994b450 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f17445e9700(0000) GS:ffff88802d100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000005cf2e000 CR4: 0000000000340ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_syscall_64+0x9d/0x7d0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c727 Code: 48 83 c4 08 48 89 d8 5b 5d c3 66 0f 1f 84 00 00 00 00 00 48 89 e8 48 f7 d8 48 39 c3 0f 92 c0 eb 92 66 90 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 1d b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f17445e6aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045c727 RDX: 00007f17445e7c40 RSI: 0000000080085502 RDI: 0000000000000003 RBP: 00007f17445e6b00 R08: 0000000000000000 R09: 000000000000000b R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000c54 R14: 00000000006ecc80 R15: 00000000004b5807 Modules linked in: CR2: 0000000000000000 ---[ end trace 4d126d9cae7b9100 ]--- RIP: 0010:__read_once_size include/linux/compiler.h:252 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x43/0x60 kernel/kcov.c:202 Code: 24 74 0f 80 e6 01 74 35 8b 90 04 14 00 00 85 d2 74 2b 8b 90 e0 13 00 00 83 fa 02 75 20 48 8b 88 e8 13 00 00 8b 80 e4 13 00 00 <48> 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 66 0f RSP: 0018:ffffc90002457f20 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000010 RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff8100b3dd RDI: 0000000000000007 RBP: ffffc90002457f58 R08: ffff88805d0203c0 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff8994b450 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f17445e9700(0000) GS:ffff88802d100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000005cf2e000 CR4: 0000000000340ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400