syzbot


Internal error in generic_map_delete_batch

Status: upstream: reported on 2025/08/09 00:06
Reported-by: syzbot+83a841b67f1a14cafe73@syzkaller.appspotmail.com
First crash: 19d, last: 12d

Sample crash report:
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4800 Comm: syz.0.235 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : generic_map_delete_batch+0x264/0xa5c kernel/bpf/syscall.c:1342
lr : generic_map_delete_batch+0x240/0xa5c kernel/bpf/syscall.c:1342
sp : ffff80001fb87a60
x29: ffff80001fb87b50 x28: 0000000020000000 x27: ffff0000d3f78000
x26: dfff800000000000 x25: 0000000020000460 x24: 1ffff00003f70f5c
x23: 0000000000000008 x22: 00000000fffffff2 x21: 0000000000000000
x20: 0000000020000460 x19: ffff0000f0bf7000 x18: 0000000000000000
x17: 0000000000000002 x16: ffff800008516a38 x15: 000000000000001b
x14: 0000000000ff0100 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000002 x9 : 0000000020000460
x8 : 0000ffffffffffff x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 generic_map_delete_batch+0x264/0xa5c kernel/bpf/syscall.c:1342
 bpf_map_do_batch+0x388/0x530 kernel/bpf/syscall.c:-1
 __sys_bpf+0x27c/0x5f0 kernel/bpf/syscall.c:-1
 __do_sys_bpf kernel/bpf/syscall.c:4755 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4753 [inline]
 __arm64_sys_bpf+0x80/0x98 kernel/bpf/syscall.c:4753
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: d503229f 2a1f03f6 2a1f03e0 b8000936 (2a1603e1) 
---[ end trace 5b94dd51de829ac4 ]---
----------------
Code disassembly (best guess):
   0:	d503229f 	csdb
   4:	2a1f03f6 	mov	w22, wzr
   8:	2a1f03e0 	mov	w0, wzr
   c:	b8000936 	sttr	w22, [x9]
* 10:	2a1603e1 	mov	w1, w22 <-- trapping instruction

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/15 11:13 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 Internal error in generic_map_delete_batch
2025/08/15 11:13 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 Internal error in generic_map_delete_batch
2025/08/09 13:24 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 Internal error in generic_map_delete_batch
2025/08/09 08:08 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 Internal error in generic_map_delete_batch
2025/08/08 23:16 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 Internal error in generic_map_delete_batch
2025/08/08 23:16 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 Internal error in generic_map_delete_batch
* Struck through repros no longer work on HEAD.