general protection fault, probably for non-canonical address 0xdffffc000000001d: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000e8-0x00000000000000ef] CPU: 1 PID: 2394 Comm: syz-executor.5 Not tainted 6.1.61-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:__lock_acquire+0x69/0x1f80 kernel/locking/lockdep.c:4918 Code: df 0f b6 04 10 84 c0 0f 85 fb 15 00 00 83 3d 31 17 09 0d 00 0f 84 a8 14 00 00 83 3d e0 30 95 0b 00 74 2b 4c 89 f0 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 f7 e8 29 76 77 00 48 ba 00 00 00 00 00 fc RSP: 0018:ffffc900063076a0 EFLAGS: 00010006 RAX: 000000000000001d RBX: 0000000000000000 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 00000000000000e8 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: ffff88802e729dc0 R14: 00000000000000e8 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32530000 CR3: 000000004efa3000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5661 down_write+0x36/0x60 kernel/locking/rwsem.c:1573 __unmap_hugepage_range_final+0x13d/0x5a0 mm/hugetlb.c:5430 unmap_vmas+0x48b/0x640 mm/memory.c:1730 exit_mmap+0x252/0x9f0 mm/mmap.c:3214 __mmput+0x115/0x3c0 kernel/fork.c:1199 exit_mm+0x226/0x300 kernel/exit.c:563 do_exit+0x9f6/0x26a0 kernel/exit.c:856 __do_sys_exit kernel/exit.c:986 [inline] __se_sys_exit kernel/exit.c:984 [inline] __x64_sys_exit+0x3c/0x40 kernel/exit.c:984 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f270be7cae9 Code: Unable to access opcode bytes at 0x7f270be7cabf. RSP: 002b:00007f270cc3b078 EFLAGS: 00000246 ORIG_RAX: 000000000000003c RAX: ffffffffffffffda RBX: 00007f270bf9bf80 RCX: 00007f270be7cae9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f270bec847a R08: 0000000020000000 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f270bf9bf80 R15: 00007ffe89469b68 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0x69/0x1f80 kernel/locking/lockdep.c:4918 Code: df 0f b6 04 10 84 c0 0f 85 fb 15 00 00 83 3d 31 17 09 0d 00 0f 84 a8 14 00 00 83 3d e0 30 95 0b 00 74 2b 4c 89 f0 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 f7 e8 29 76 77 00 48 ba 00 00 00 00 00 fc RSP: 0018:ffffc900063076a0 EFLAGS: 00010006 RAX: 000000000000001d RBX: 0000000000000000 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 00000000000000e8 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: ffff88802e729dc0 R14: 00000000000000e8 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32530000 CR3: 000000004efa3000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: df 0f fisttps (%rdi) 2: b6 04 mov $0x4,%dh 4: 10 84 c0 0f 85 fb 15 adc %al,0x15fb850f(%rax,%rax,8) b: 00 00 add %al,(%rax) d: 83 3d 31 17 09 0d 00 cmpl $0x0,0xd091731(%rip) # 0xd091745 14: 0f 84 a8 14 00 00 je 0x14c2 1a: 83 3d e0 30 95 0b 00 cmpl $0x0,0xb9530e0(%rip) # 0xb953101 21: 74 2b je 0x4e 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction 2e: 74 12 je 0x42 30: 4c 89 f7 mov %r14,%rdi 33: e8 29 76 77 00 call 0x777661 38: 48 rex.W 39: ba 00 00 00 00 mov $0x0,%edx 3e: 00 fc add %bh,%ah