=====================================================
BUG: KMSAN: uninit-value in exit_to_user_mode_loop+0x464/0x490 kernel/entry/common.c:159
exit_to_user_mode_loop+0x464/0x490 kernel/entry/common.c:159
exit_to_user_mode_prepare kernel/entry/common.c:210 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x80/0xc0 kernel/entry/common.c:304
__do_fast_syscall_32+0xa5/0xf0 arch/x86/entry/common.c:183
do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205
do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
Local variable ----regs@__bpf_prog_run32 created at:
__bpf_prog_run32+0x84/0x180 kernel/bpf/core.c:1785
bpf_dispatcher_nop_func include/linux/bpf.h:717 [inline]
__bpf_prog_run include/linux/filter.h:624 [inline]
bpf_prog_run include/linux/filter.h:631 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1871 [inline]
bpf_trace_run2+0x123/0x370 kernel/trace/bpf_trace.c:1908
=====================================================
Kernel panic - not syncing: panic_on_kmsan set ...
CPU: 1 PID: 14884 Comm: syz-executor.2 Tainted: G B 5.15.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1ff/0x28e lib/dump_stack.c:106
dump_stack+0x25/0x28 lib/dump_stack.c:113
panic+0x44f/0xdeb kernel/panic.c:232
kmsan_report+0x2ee/0x300 mm/kmsan/report.c:186
__msan_warning+0xd7/0x150 mm/kmsan/instrumentation.c:208
exit_to_user_mode_loop+0x464/0x490 kernel/entry/common.c:159
exit_to_user_mode_prepare kernel/entry/common.c:210 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x80/0xc0 kernel/entry/common.c:304
__do_fast_syscall_32+0xa5/0xf0 arch/x86/entry/common.c:183
do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205
do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6f53549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00
RSP: 002b:00000000f454d68c EFLAGS: 00000246 ORIG_RAX: 00000000000000f0
RAX: 0000000000000001 RBX: 00000000f70affac RCX: 0000000000000081
RDX: 00000000000f4240 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000f6f6a6a9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..
----------------
Code disassembly (best guess):
0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi
4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d
a: 10 06 adc %al,(%rsi)
c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
10: 10 07 adc %al,(%rdi)
12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
16: 10 08 adc %cl,(%rax)
18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1c: 00 00 add %al,(%rax)
1e: 00 00 add %al,(%rax)
20: 00 51 52 add %dl,0x52(%rcx)
23: 55 push %rbp
24: 89 e5 mov %esp,%ebp
26: 0f 34 sysenter
28: cd 80 int $0x80
* 2a: 5d pop %rbp <-- trapping instruction
2b: 5a pop %rdx
2c: 59 pop %rcx
2d: c3 retq
2e: 90 nop
2f: 90 nop
30: 90 nop
31: 90 nop
32: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
39: 00 00 00
3c: 0f .byte 0xf
3d: 1f (bad)
3e: 44 rex.R