lowmemorykiller: Killing 'syz-executor.0' (3689) (tgid 3689), adj 1000, to free 35004kB on behalf of 'syz-fuzzer' (2071) because cache 1316kB is below limit 6144kB for oom_score_adj 0 Free memory is 1228kB above reserved ------------[ cut here ]------------ WARNING: CPU: 1 PID: 23237 at arch/x86/mm/pat.c:1019 untrack_pfn+0x242/0x290 arch/x86/mm/pat.c:1019 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 23237 Comm: syz-executor.1 Not tainted 4.9.141+ #23 ffff8801ad417650 ffffffff81b42e79 ffffffff82a38ce0 00000000ffffffff ffffffff82a34000 0000000000000001 0000000000000009 ffff8801ad417710 ffffffff813f7125 0000000041b58ab3 ffffffff82e2b62b ffffffff813f6f66 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bf/0x39f kernel/panic.c:179 [] __warn.cold.8+0x2f/0x2f kernel/panic.c:542 [] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585 [] untrack_pfn+0x242/0x290 arch/x86/mm/pat.c:1019 [] unmap_single_vma+0x141/0x170 mm/memory.c:1315 [] unmap_vmas+0x81/0xd0 mm/memory.c:1366 [] exit_mmap+0x1cc/0x3a0 mm/mmap.c:3021 [] __mmput kernel/fork.c:884 [inline] [] mmput+0xcd/0x360 kernel/fork.c:906 [] exit_mm kernel/exit.c:514 [inline] [] do_exit+0x6c9/0x2a50 kernel/exit.c:820 [] do_group_exit+0x111/0x300 kernel/exit.c:937 [] get_signal+0x4e1/0x1460 kernel/signal.c:2321 [] do_signal+0x95/0x1b00 arch/x86/kernel/signal.c:807 [] exit_to_usermode_loop+0x10e/0x150 arch/x86/entry/common.c:158 [] prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] [] syscall_return_slowpath arch/x86/entry/common.c:263 [inline] [] do_syscall_32_irqs_on arch/x86/entry/common.c:334 [inline] [] do_fast_syscall_32+0x6dc/0xa10 arch/x86/entry/common.c:390 [] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137 Kernel Offset: disabled Rebooting in 86400 seconds..