syzbot

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WARNING: CPU: 0 PID: 13440 at ./arch/x86/include/asm/fpu/internal.h:534 __fpregs_activate arch/x86/include/asm/fpu/internal.h:534 [inline]
WARNING: CPU: 0 PID: 13440 at ./arch/x86/include/asm/fpu/internal.h:534 fpregs_activate arch/x86/include/asm/fpu/internal.h:566 [inline]
WARNING: CPU: 0 PID: 13440 at ./arch/x86/include/asm/fpu/internal.h:534 fpu__restore+0x3bc/0x8a0 arch/x86/kernel/fpu/core.c:461
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 13440 Comm: syz-executor2 Not tainted 4.9.113-g47bbcd6 #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d37efaa8 ffffffff81eb32a9 ffffffff83c48980 00000000ffffffff
 0000000000000000 0000000000000000 0000000000000216 ffff8801d37efb68
 ffffffff81421a55 0000000041b58ab3 ffffffff843bb788 ffffffff81421896
Call Trace:
 [<ffffffff81eb32a9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb32a9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81421a55>] panic+0x1bf/0x3bc kernel/panic.c:179
 [<ffffffff81421d41>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff8113684c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff8106d93c>] __fpregs_activate arch/x86/include/asm/fpu/internal.h:534 [inline]
 [<ffffffff8106d93c>] fpregs_activate arch/x86/include/asm/fpu/internal.h:566 [inline]
 [<ffffffff8106d93c>] fpu__restore+0x3bc/0x8a0 arch/x86/kernel/fpu/core.c:461
 [<ffffffff810722ff>] __fpu__restore_sig+0x4df/0x1260 arch/x86/kernel/fpu/signal.c:349
 [<ffffffff810735a7>] fpu__restore_sig+0x87/0xe0 arch/x86/kernel/fpu/signal.c:388
 [<ffffffff8111b6dd>] ia32_restore_sigcontext+0x3cd/0x490 arch/x86/ia32/ia32_signal.c:108
 [<ffffffff8111c115>] sys32_rt_sigreturn+0x1d5/0x290 arch/x86/ia32/ia32_signal.c:156
 [<ffffffff81006da7>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387
 [<ffffffff839fb690>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..