bisecting fixing commit since c98875d930e915d01e8c40c7d3c16f00b3c8abe1 building syzkaller on b617407b25b37a7a8efa47127005d1f20dd0abe1 testing commit c98875d930e915d01e8c40c7d3c16f00b3c8abe1 with gcc (GCC) 8.1.0 kernel signature: b60bb8713a975782cec6d946ee7e3331004e923df38a94df68a49d676f07c2dc all runs: crashed: WARNING in __vm_enough_memory testing current HEAD f25804f389846835535db255e7ba80eeed967ed7 testing commit f25804f389846835535db255e7ba80eeed967ed7 with gcc (GCC) 8.1.0 kernel signature: 601893a51fc7934034d79de8e6aba9725e703ad153028ab4063d6269c37ebdac all runs: crashed: WARNING in __vm_enough_memory revisions tested: 2, total time: 25m13.863544422s (build: 17m44.396304364s, test: 6m22.755448851s) the crash still happens on HEAD commit msg: Linux 4.19.106 crash: WARNING in __vm_enough_memory IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state memory commitment underflow WARNING: CPU: 1 PID: 7028 at mm/util.c:652 __vm_enough_memory+0x3c3/0x4b0 mm/util.c:650 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7028 Comm: syz-executor.5 Not tainted 4.19.106-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 panic+0x1cd/0x387 kernel/panic.c:186 __warn.cold.8+0x1b/0x3c kernel/panic.c:541 report_bug+0x1a4/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x200/0x350 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037 RIP: 0010:__vm_enough_memory+0x3c3/0x4b0 mm/util.c:650 Code: ea 02 48 29 d0 e9 3b ff ff ff 80 3d f2 e3 4a 07 00 0f 85 ec fc ff ff 48 c7 c7 e0 78 f1 86 c6 05 de e3 4a 07 01 e8 40 61 b7 ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 0f b6 14 RSP: 0018:ffff88808b587b30 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffffffff8821b040 RCX: 1ffff1101425698c RDX: 1ffffffff1024129 RSI: ffff8880a12b4c40 RDI: 0000000000000286 RBP: ffff88808b587b68 R08: ffff8880a12b4c60 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000021 R13: ffff88809985b500 R14: 0000000000000001 R15: fff80000000139a7 security_vm_enough_memory_mm+0x78/0xa0 security/security.c:334 mmap_region+0x293/0x1480 mm/mmap.c:1709 do_mmap+0x6b5/0xea0 mm/mmap.c:1530 do_mmap_pgoff include/linux/mm.h:2314 [inline] vm_mmap_pgoff+0x195/0x210 mm/util.c:357 ksys_mmap_pgoff+0xa4/0x650 mm/mmap.c:1580 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458dfa Code: 89 f5 41 54 49 89 fc 55 53 74 35 49 63 e8 48 63 da 4d 89 f9 49 89 e8 4d 63 d6 48 89 da 4c 89 ee 4c 89 e7 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 4e 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f 1f 00 RSP: 002b:00007ffcb1e88968 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458dfa RDX: 0000000000000003 RSI: 0000000000021000 RDI: 0000000000000000 RBP: ffffffffffffffff R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000020022 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000021000 R14: 0000000000020022 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..