Hello, syzbot found the following issue on: HEAD commit: e28f0104 Merge tag 'fixes-2020-09-03' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1252b7fe900000 kernel config: https://syzkaller.appspot.com/x/.config?x=3c5f6ce8d5b68299 dashboard link: https://syzkaller.appspot.com/bug?extid=2200e21ff920b6b08faa compiler: gcc (GCC) 10.1.0-syz 20200507 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2200e21ff920b6b08faa@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ kernel BUG at mm/huge_memory.c:1654! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 25918 Comm: syz-executor.5 Not tainted 5.9.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:zap_huge_pmd+0x8cb/0xfa0 mm/huge_memory.c:1654 Code: 24 1c 0f 84 c9 03 00 00 e8 42 2a bd ff 8b 34 24 bf 1d 00 00 00 e8 b5 26 bd ff 48 83 3c 24 1d 0f 84 ac 03 00 00 e8 25 2a bd ff <0f> 0b e8 1e 2a bd ff 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 RSP: 0018:ffffc90004ac7730 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0770000000000000 RCX: ffffffff81b720cb RDX: ffff8880985c0200 RSI: ffffffff81b720db RDI: 0000000000000005 RBP: ffffc90004ac7a50 R08: 0000000000000001 R09: ffff888000183827 R10: 000000000000001d R11: 0000000000000000 R12: ffff888000183820 R13: ffff88804d29b900 R14: ffffffff89b63d70 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000016a3b73 CR3: 000000009b476000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: zap_pmd_range mm/memory.c:1182 [inline] zap_pud_range mm/memory.c:1224 [inline] zap_p4d_range mm/memory.c:1245 [inline] unmap_page_range+0x107b/0x2b20 mm/memory.c:1266 unmap_single_vma+0x198/0x300 mm/memory.c:1311 unmap_vmas+0x168/0x2e0 mm/memory.c:1343 exit_mmap+0x2b1/0x530 mm/mmap.c:3183 __mmput+0x122/0x470 kernel/fork.c:1076 mmput+0x53/0x60 kernel/fork.c:1097 exit_mm kernel/exit.c:483 [inline] do_exit+0xa8b/0x29f0 kernel/exit.c:793 do_group_exit+0x125/0x310 kernel/exit.c:903 get_signal+0x428/0x1f00 kernel/signal.c:2757 arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:136 [inline] exit_to_user_mode_prepare+0x1ae/0x200 kernel/entry/common.c:167 syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:242 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: Bad RIP value. RSP: 002b:00007f290f37fcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 000000000118cfe8 RCX: 000000000045d5b9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 000000000118cfec RBP: 000000000118cfe0 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cfec R13: 00007ffc935c909f R14: 00007f290f3809c0 R15: 000000000118cfec Modules linked in: ---[ end trace 9c85984f4836a6e7 ]--- RIP: 0010:zap_huge_pmd+0x8cb/0xfa0 mm/huge_memory.c:1654 Code: 24 1c 0f 84 c9 03 00 00 e8 42 2a bd ff 8b 34 24 bf 1d 00 00 00 e8 b5 26 bd ff 48 83 3c 24 1d 0f 84 ac 03 00 00 e8 25 2a bd ff <0f> 0b e8 1e 2a bd ff 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 RSP: 0018:ffffc90004ac7730 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0770000000000000 RCX: ffffffff81b720cb RDX: ffff8880985c0200 RSI: ffffffff81b720db RDI: 0000000000000005 RBP: ffffc90004ac7a50 R08: 0000000000000001 R09: ffff888000183827 R10: 000000000000001d R11: 0000000000000000 R12: ffff888000183820 R13: ffff88804d29b900 R14: ffffffff89b63d70 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000016a3b73 CR3: 000000009b476000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
