general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 1 PID: 24030 Comm: syz-executor.4 Not tainted 5.9.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mm_update_next_owner+0x497/0x7a0 kernel/exit.c:389 Code: 48 8d bd 60 03 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 f7 02 00 00 48 8b ad 60 03 00 00 4c 8d 7d 10 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 ce 02 00 00 48 8b 45 10 48 8d a8 68 fa ff ff 49 RSP: 0018:ffffc90007f7fd58 EFLAGS: 00010202 RAX: 0000000000000002 RBX: dffffc0000000000 RCX: ffffffff8146789f RDX: ffff888054dee440 RSI: ffffffff814678ad RDI: ffff888000116ab8 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff89a09083 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804f5f60c0 R13: ffff888000116380 R14: 0000000000000000 R15: 0000000000000010 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000011890a0 CR3: 00000001d9251000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: exit_mm kernel/exit.c:482 [inline] do_exit+0xa83/0x29f0 kernel/exit.c:793 do_group_exit+0x125/0x310 kernel/exit.c:903 __do_sys_exit_group kernel/exit.c:914 [inline] __se_sys_exit_group kernel/exit.c:912 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:912 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d579 Code: Bad RIP value. RSP: 002b:00007fff8dd32ab8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 000000000045d579 RDX: 0000000000416ec1 RSI: fffffffffffffff7 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff8dd32b10 R10: 0000000001190600 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff8dd32b10 R14: 0000000000000000 R15: 00007fff8dd32b20 Modules linked in: ---[ end trace 4ae7195d4b20445f ]--- RIP: 0010:mm_update_next_owner+0x497/0x7a0 kernel/exit.c:389 Code: 48 8d bd 60 03 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 f7 02 00 00 48 8b ad 60 03 00 00 4c 8d 7d 10 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 ce 02 00 00 48 8b 45 10 48 8d a8 68 fa ff ff 49 RSP: 0018:ffffc90007f7fd58 EFLAGS: 00010202 RAX: 0000000000000002 RBX: dffffc0000000000 RCX: ffffffff8146789f RDX: ffff888054dee440 RSI: ffffffff814678ad RDI: ffff888000116ab8 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff89a09083 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804f5f60c0 R13: ffff888000116380 R14: 0000000000000000 R15: 0000000000000010 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000011890a0 CR3: 00000001d9251000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400