syzbot


Internal error in __switch_to

Status: moderation: reported on 2024/06/03 23:49
Subsystems: arm
[Documentation on labels]
Reported-by: syzbot+6fa2d54872b1be42c821@syzkaller.appspotmail.com
First crash: 15d, last: 15d

Sample crash report:
Internal error: Oops - FPAC: 0000000072000000 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4177 Comm: syz-executor.1 Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0
Hardware name: linux,dummy-virt (DT)
pstate: 804000c9 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __switch_to+0xe8/0x124 arch/arm64/kernel/process.c:556
lr : 0xb20f800081976ad8
sp : ffff800088f839a0
x29: ff7f800088f839a0 x28: fdf00000041c8000 x27: 0000000020c15000
x26: 0000000000000001 x25: fdf00000041c86a0 x24: ffff8000825e3308
x23: 308f8000819779a4 x22: fdf00000041c8000 x21: fff000007f8ee340
x20: 0000000000000080 x19: f070000002e54980 x18: 0000000000000014
x17: fff07ffffd331000 x16: ffff800080008000 x15: 00000000054b9281
x14: 000000000000033d x13: 0000000000000000 x12: ffff8000825e0028
x11: 0000000000000001 x10: 2fb59b7b3b1fcaed x9 : 637defc0ebb07af4
x8 : fdf00000041c91d8 x7 : 0000000000000004 x6 : 0000000000000190
x5 : 00000000000f0510 x4 : 0000000000f0000f x3 : 000000000000ffff
x2 : 92000d3ab474591d x1 : fdf00000041c8000 x0 : f0f0000002e54900
Call trace:
 __switch_to+0xe8/0x124 arch/arm64/kernel/process.c:556
Code: aa1403e0 979a7ac0 a94153f3 a8c27bfd (d50323bf) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	aa1403e0 	mov	x0, x20
   4:	979a7ac0 	bl	0xfffffffffe69eb04
   8:	a94153f3 	ldp	x19, x20, [sp, #16]
   c:	a8c27bfd 	ldp	x29, x30, [sp], #32
* 10:	d50323bf 	autiasp <-- trapping instruction

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/31 02:57 upstream 4a4be1ad3a6e 34889ee3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte Internal error in __switch_to
2024/05/30 23:45 upstream 4a4be1ad3a6e 34889ee3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte Internal error in __switch_to
* Struck through repros no longer work on HEAD.