root@ubuntu:~# echo c > /proc/sysrq-trigger
[ 26.686014] sysrq: Trigger a crash
[ 26.687006] Kernel panic - not syncing: sysrq triggered crash
[ 26.688594] CPU: 0 UID: 0 PID: 4235 Comm: bash Kdump: loaded Not tainted 6.17.0-rc7-next-20250923ce7f1a983b07 #1 PREEMPT(voluntary)
[ 26.691788] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS unknown 02/02/2022
[ 26.693957] Call Trace:
[ 26.694681]
[ 26.695320] vpanic+0x307/0x360
[ 26.696237] panic+0x52/0x60
[ 26.697065] sysrq_handle_crash+0x11/0x20
[ 26.698177] __handle_sysrq+0xb6/0x170
[ 26.699220] write_sysrq_trigger+0x50/0x70
[ 26.700358] proc_reg_write+0x50/0x90
[ 26.701395] ? preempt_count_add+0x42/0xa0
[ 26.702531] vfs_write+0xf4/0x430
[ 26.703481] ? handle_mm_fault+0xd0/0x200
[ 26.704602] ksys_write+0x5c/0xd0
[ 26.705551] do_syscall_64+0x4c/0x200
[ 26.706577] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 26.707961] RIP: 0033:0x7f4cb8024574
[ 26.708974] Code: c7 00 16 00 00 00 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 80 3d d5 ea 0e 00 00 74 13 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 55 48 89 e5 48 83 ec 20 48 89
[ 26.713912] RSP: 002b:00007ffdad4f3208 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[ 26.715976] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f4cb8024574
[ 26.717905] RDX: 0000000000000002 RSI: 0000564731e37b80 RDI: 0000000000000001
[ 26.719843] RBP: 00007ffdad4f3230 R08: 0000000000000073 R09: 0000000000000000
[ 26.721797] R10: 00000000ffffffff R11: 0000000000000202 R12: 0000000000000002
[ 26.723715] R13: 0000564731e37b80 R14: 00007f4cb810c5c0 R15: 00007f4cb8109ee0
[ 26.725658]
[1373710140.379273] kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
[2800084354.542901] BUG: unable to handle page fault for address: ffffffff9a91e731
[15541331571.597940] #PF: supervisor instruction fetch in kernel mode
[11262208929.107056] #PF: error_code(0x0011) - permissions violation
[15541331571.597940] PGD 800000e045067 P4D 800000e045067 PUD 800000e046063 PMD 80000021b8063 PTE 800800000e91e163
[1373710140.379273] Oops: Oops: 0011 [#1] SMP NOPTI
[11262208929.107056] CPU: 0 UID: 0 PID: 4235 Comm: bash Kdump: loaded Not tainted 6.17.0-rc7-next-20250923ce7f1a983b07 #1 PREEMPT(voluntary)
[2800084354.542901] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS unknown 02/02/2022
[12688583143.270684] RIP: 0010:early_set_pages_state+0x0/0x120
[15541331571.597940] Code: 02 02 02 02 02 00 02 02 02 02 02 02 02 02 02 02 02 02 02 02 00 02 02 02 00 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 <02> 02 02 02 02 02 02 02 02 02 02 02 02 02 02 00 02 02 02 02 02 02
[12688583143.270684] RSP: 0018:ffffb608807a7be0 EFLAGS: 00010006
[1373710140.379273] RAX: ffff9ed0bfe53000 RBX: ffffffff9abecbe8 RCX: ffffb608807a7be8
[2800084354.542901] RDX: 0000000000000001 RSI: 000000007fe53000 RDI: ffff9ed03fe53000
[1373710140.379273] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff9ed03fe53000
[12688583143.270684] R10: 000000000f001000 R11: 0000000000000000 R12: ffff9ed03fe53000
[15541331571.597940] R13: 0000000000000000 R14: ffff9ecfcf00a298 R15: 0000000000001000
[11262208929.107056] FS: 00007f4cb7f05740(0000) GS:ffff9ed0a282c000(0000) knlGS:0000000000000000
[2800084354.542901] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[18394079999.925196] CR2: ffffffff9a91e731 CR3: 000800000fb1c000 CR4: 00000000003506f0
[12688583143.270684] Call Trace:
[18394079999.925196]
[2800084354.542901] set_pages_state.part.0+0x63/0xa0
[2800084354.542901] snp_kexec_finish+0x432/0x490
[12688583143.270684] native_machine_crash_shutdown+0x65/0x90
[15541331571.597940] __crash_kexec+0x56/0x120
[1373710140.379273] ? __crash_kexec+0x104/0x120
[12688583143.270684] ? vpanic+0x2a2/0x360
[18394079999.925196] ? panic+0x52/0x60
[11262208929.107056] ? sysrq_handle_crash+0x11/0x20
[16967705785.761568] ? __handle_sysrq+0xb6/0x170
[1373710140.379273] ? write_sysrq_trigger+0x50/0x70
[1373710140.379273] ? proc_reg_write+0x50/0x90
[18394079999.925196] ? preempt_count_add+0x42/0xa0
[2800084354.542901] ? vfs_write+0xf4/0x430
[11262208929.107056] ? handle_mm_fault+0xd0/0x200
[18394079999.925196] ? ksys_write+0x5c/0xd0
[12688583143.270684] ? do_syscall_64+0x4c/0x200
[11262208929.107056] ? entry_SYSCALL_64_after_hwframe+0x76/0x7e
[15541331571.597940]
[12688583143.270684] Modules linked in: efivarfs
[2800084354.542901] CR2: ffffffff9a91e731
[14114957357.434312] ---[ end trace 0000000000000000 ]---
[11262208929.107056] RIP: 0010:early_set_pages_state+0x0/0x120
[12688583143.270684] Code: 02 02 02 02 02 00 02 02 02 02 02 02 02 02 02 02 02 02 02 02 00 02 02 02 00 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 <02> 02 02 02 02 02 02 02 02 02 02 02 02 02 02 00 02 02 02 02 02 02
[15541331571.597940] RSP: 0018:ffffb608807a7be0 EFLAGS: 00010006
[14114957357.434312] RAX: ffff9ed0bfe53000 RBX: ffffffff9abecbe8 RCX: ffffb608807a7be8
[2800084354.542901] RDX: 0000000000000001 RSI: 000000007fe53000 RDI: ffff9ed03fe53000
[15541331571.597940] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff9ed03fe53000
[2800084354.542901] R10: 000000000f001000 R11: 0000000000000000 R12: ffff9ed03fe53000
[2800084354.542901] R13: 0000000000000000 R14: ffff9ecfcf00a298 R15: 0000000000001000
[2800084354.542901] FS: 00007f4cb7f05740(0000) GS:ffff9ed0a282c000(0000) knlGS:0000000000000000
[14114957357.434312] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[11262208929.107056] CR2: ffffffff9a91e731 CR3: 000800000fb1c000 CR4: 00000000003506f0
[12688583143.270684] Kernel panic - not syncing: Fatal exception