syzbot


BUG: unable to handle kernel paging request in do_symlinkat

Status: auto-obsoleted due to no activity on 2023/10/01 20:01
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+55ad04ec36404f5eec76@syzkaller.appspotmail.com
First crash: 528d, last: 528d

Sample crash report:
Unable to handle kernel paging request at virtual address bfff80008ac53d10
Mem abort info:
  ESR = 0x0000000086000004
  EC = 0x21: IABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x04: level 0 translation fault
swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000042480000
[bfff80008ac53d10] pgd=10000000bffff803, p4d=10000000bffff803, pud=10000000bfffe803, pmd=100000005f98e003, pte=006800005aa87f07
Internal error: Oops: 0000000086000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4245 Comm: syz-executor.1 Not tainted 6.4.0-syzkaller-04247-g3a8a670eeeaa #0
Hardware name: linux,dummy-virt (DT)
pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : 0xbfff80008ac53d10
lr : 0xffff80008ac53d10
sp : ffff80008aa0bd40
x29: ffff80008aa0bd40 x28: f9ff00001faf2f40 x27: 0000000000000000
x26: 0000000000000000 x25: 0000000000000000 x24: 00000000ffffff9c
x23: faff00000496a000 x22: fbff00000496f020 x21: fcff000019a52b40
x20: ffff80008aa0bdb8 x19: ffff8000821bce48 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: ffff80008030882c
x14: ffff800080308710 x13: ffff800081874d34 x12: ffff800080027b28
x11: ffff800080011558 x10: ffff80008187516c x9 : ffff800081874d34
x8 : ffff800080027b28 x7 : 0000000000008000 x6 : 0000000000000001
x5 : f9ff00001faf2f40 x4 : ffff8000823c6c00 x3 : 0000000000000000
x2 : 0000000000000000 x1 : f9ff00001faf2f40 x0 : 0000000000000000
Call trace:
 0xbfff80008ac53d10
 do_symlinkat+0x74/0x140 fs/namei.c:4501
 __do_sys_symlinkat fs/namei.c:4519 [inline]
 __se_sys_symlinkat fs/namei.c:4516 [inline]
 __arm64_sys_symlinkat+0x50/0x68 fs/namei.c:4516
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:52
 el0_svc_common.constprop.0+0x44/0xe4 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x38/0xa4 arch/arm64/kernel/syscall.c:191
 el0_svc+0x2c/0xb0 arch/arm64/kernel/entry-common.c:647
 el0t_64_sync_handler+0xc0/0xc4 arch/arm64/kernel/entry-common.c:665
 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:591
Code: 00000081 00000000 00000000 00000000 (ffffffff) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	00000081 	udf	#129
* 10:	ffffffff 	.inst	0xffffffff ; undefined <-- trapping instruction

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/07/03 20:01 upstream 3a8a670eeeaa 6e553898 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte BUG: unable to handle kernel paging request in do_symlinkat
* Struck through repros no longer work on HEAD.