utrace-uaf-panic.txt

[Sun Jan 24 06:10:46 2021] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
[Sun Jan 24 06:10:46 2021] IP: [<ffffffffc0675340>] start_callback.isra.37+0x20/0xb0 [c_fgraph_X_24812]
[Sun Jan 24 06:10:46 2021] PGD 0 

[Sun Jan 24 06:10:46 2021] Oops: 0000 [#1] PREEMPT SMP
[Sun Jan 24 06:10:46 2021] Modules linked in: c_fgraph_X_24812(O) joydev hid_generic iTCO_wdt iTCO_vendor_support evdev usbhid snd_hda_codec_generic crct10dif_pclmul hid crc32_pclmul ghash_clmulni_intel snd_hda_intel serio_raw virtio_rng snd_hda_codec snd_hda_core rng_core snd_hwdep virtio_balloon pcspkr virtio_console snd_pcm qxl snd_timer ttm snd lpc_ich mfd_core soundcore drm_kms_helper drm shpchp button ip_tables x_tables autofs4 ext4 crc16 jbd2 crc32c_generic fscrypto ecb mbcache ahci xhci_pci xhci_hcd crc32c_intel libahci virtio_net virtio_blk aesni_intel aes_x86_64 glue_helper virtio_pci lrw gf128mul usbcore libata virtio_ring ablk_helper i2c_i801 usb_common virtio cryptd i2c_smbus scsi_mod psmouse
[Sun Jan 24 06:10:46 2021] CPU: 2 PID: 25079 Comm: sleep Tainted: G           O    4.9.0-8-rt-amd64 #1 Debian 4.9.110-3+deb9u3
[Sun Jan 24 06:10:46 2021] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[Sun Jan 24 06:10:46 2021] task: ffff91a7ac0f8fc0 task.stack: ffffb66948760000
[Sun Jan 24 06:10:46 2021] RIP: 0010:[<ffffffffc0675340>]  [<ffffffffc0675340>] start_callback.isra.37+0x20/0xb0 [c_fgraph_X_24812]
[Sun Jan 24 06:10:46 2021] RSP: 0018:ffffb66948763de0  EFLAGS: 00010286
[Sun Jan 24 06:10:46 2021] RAX: 0000000000000000 RBX: fffffffffffffff0 RCX: 0000000000000020
[Sun Jan 24 06:10:46 2021] RDX: fffffffffffffff0 RSI: ffffb66948763e10 RDI: ffff91a79e893f00
[Sun Jan 24 06:10:46 2021] RBP: ffff91a79e893f00 R08: 0000000000000000 R09: 0000000000000000
[Sun Jan 24 06:10:46 2021] R10: ffff91a7ae09d690 R11: ffff91a7b2c00e40 R12: ffffb66948763e10
[Sun Jan 24 06:10:46 2021] R13: ffff91a79e893f00 R14: 0000000000000020 R15: ffff91a7ac0f8fc0
[Sun Jan 24 06:10:46 2021] FS:  0000000000000000(0000) GS:ffff91a7b3300000(0000) knlGS:0000000000000000
[Sun Jan 24 06:10:46 2021] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Sun Jan 24 06:10:46 2021] CR2: 0000000000000020 CR3: 0000000154a0a000 CR4: 00000000003406f0
[Sun Jan 24 06:10:46 2021] Stack:
[Sun Jan 24 06:10:46 2021]  fffffffffffffff0 ffff91a79e893f00 ffff91a79e893f30 ffffffffc07e2370
[Sun Jan 24 06:10:46 2021]  ffffffffc07e2418 ffffffffc0683b8f 0000000300000000 0000010000000003
[Sun Jan 24 06:10:46 2021]  eab36cf456c225be ffffffffc07e2418 ffff91a7ac0f8fc0 ffffffffbd0f0d30
[Sun Jan 24 06:10:46 2021] Call Trace:
[Sun Jan 24 06:10:46 2021]  [<ffffffffc0683b8f>] ? utrace_syscall_entry_work+0x8f/0x110 [c_fgraph_X_24812]
[Sun Jan 24 06:10:46 2021]  [<ffffffffbc29e43f>] ? task_work_run+0x7f/0xa0
[Sun Jan 24 06:10:46 2021]  [<ffffffffbc28304f>] ? do_exit+0x2cf/0xbc0
[Sun Jan 24 06:10:46 2021]  [<ffffffffc0682b9a>] ? utrace_report_syscall_entry+0x7a/0xc0 [c_fgraph_X_24812]
[Sun Jan 24 06:10:46 2021]  [<ffffffffbc2034f3>] ? syscall_trace_enter+0x293/0x310
[Sun Jan 24 06:10:46 2021]  [<ffffffffbc2839c7>] ? do_group_exit+0x47/0xc0
[Sun Jan 24 06:10:46 2021]  [<ffffffffbc283a50>] ? SyS_exit_group+0x10/0x10
[Sun Jan 24 06:10:46 2021]  [<ffffffffbc203c85>] ? do_syscall_64+0x75/0x110
[Sun Jan 24 06:10:46 2021]  [<ffffffffbc8379ce>] ? entry_SYSCALL_64_after_swapgs+0x58/0xc6
[Sun Jan 24 06:10:46 2021] Code: 94 c0 c3 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 41 56 49 89 ce 41 55 49 89 fd 41 54 49 89 f4 55 53 48 89 d3 48 89 57 50 0f ae f0 <48> 8b 42 30 48 8b 6a 20 48 81 fd 00 99 68 c0 74 2a a8 01 75 26 
[Sun Jan 24 06:10:46 2021] RIP  [<ffffffffc0675340>] start_callback.isra.37+0x20/0xb0 [c_fgraph_X_24812]
[Sun Jan 24 06:10:46 2021]  RSP <ffffb66948763de0>
[Sun Jan 24 06:10:46 2021] CR2: 0000000000000020
[Sun Jan 24 06:10:46 2021] ---[ end trace 0000000000000002 ]---