On Sun, Jul 17, 2022 at 6:42 AM Liam Howlett <liam.howlett@xxxxxxxxxx> wrote: > > * Yu Zhao <yuzhao@xxxxxxxxxx> [220717 01:58]: > > On Sat, Jul 16, 2022 at 10:20 PM Andrew Morton > > <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > > > > > > On Sun, 17 Jul 2022 02:46:32 +0000 Liam Howlett <liam.howlett@xxxxxxxxxx> wrote: > > ... > > > gap = mas.index; > > > gap += (info->align_offset - gap) & info->align_mask; > > > - VM_BUG_ON(gap + info->length > info->high_limit); > > > - VM_BUG_ON(gap + info->length > mas.last); > > What arch did you hit these on? This is x86_64. Full trace: kernel BUG at mm/mmap.c:1584! invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC PTI CPU: 108 PID: 107064 Comm: stress-ng Tainted: G S W O 5.19.0-dbg-DEV #1 RIP: 0010:vm_unmapped_area+0xdb/0x1c0 Code: b0 4c 8b 73 28 49 29 c6 4c 23 73 20 49 01 c6 48 8b 43 08 4c 01 f0 48 3b 43 18 0f 87 da 00 00 00 48 3b 45 b8 0f 86 a5 00 00 00 <0f> 0b 48 c7 45 e0 00 00 00 00 65 48 8b 04 25 40 ff 01 00 48 8b 80 RSP: 0018:ffff968562137c00 EFLAGS: 00010212 RAX: 0000000040da1000 RBX: ffff968562137c88 RCX: 00000000025a8000 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff968562137c00 RBP: ffff968562137c58 R08: ffff968562137c28 R09: ffff8f3a8d958f80 R10: 0000000000000001 R11: 000000000000000f R12: 0000000000249000 R13: 0000000000000000 R14: 0000000040b58000 R15: ffff8f3aafb741c0 FS: 0000000002586340(0000) GS:ffff8f989fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000064aff0 CR3: 00000061d15ba006 CR4: 00000000003706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> arch_get_unmapped_area+0x1ee/0x220 arch_get_unmapped_area_topdown+0x25a/0x290 get_unmapped_area+0x92/0x100 do_mmap+0x13f/0x560 vm_mmap_pgoff+0xcd/0x170 ksys_mmap_pgoff+0xd8/0x200 __x64_sys_mmap+0x3c/0x40 do_syscall_64+0x44/0xa0 entry_SYSCALL_64_after_hwframe+0x46/0xb0
