general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 1296 Comm: syz-executor.4 Not tainted 5.15.148-syzkaller-00718-g993bed180178 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:____rb_erase_color lib/rbtree.c:242 [inline] RIP: 0010:__rb_erase_color+0x60/0xa60 lib/rbtree.c:413 Code: 03 48 89 45 c8 42 80 3c 20 00 74 08 48 89 df e8 86 29 2b ff 4c 8b 33 4d 39 f7 0f 84 87 01 00 00 4c 89 e0 4d 89 f4 49 c1 ec 03 <41> 80 3c 04 00 74 08 4c 89 f7 e8 61 29 2b ff 48 89 5d a8 41 f6 06 RSP: 0018:ffffc900019d7580 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88810e3fd878 RCX: ffff8881da6762c0 RDX: ffffffff81a50880 RSI: ffff88810bdd9aa8 RDI: ffff88811a6e33d0 RBP: ffffc900019d75e0 R08: ffffffff81a4e940 R09: ffffed10217bb359 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: ffff88810e3fd870 R14: 0000000000000000 R15: ffff88811a6e33d0 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f418da73038 CR3: 000000012d602000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: rb_erase_augmented include/linux/rbtree_augmented.h:305 [inline] rb_erase_augmented_cached include/linux/rbtree_augmented.h:314 [inline] vma_interval_tree_remove+0xb82/0xba0 mm/interval_tree.c:23 __remove_shared_vm_struct mm/mmap.c:158 [inline] unlink_file_vma+0xd9/0xf0 mm/mmap.c:173 free_pgtables+0x13f/0x280 mm/memory.c:486 exit_mmap+0x3e7/0x6f0 mm/mmap.c:3210 __mmput+0x95/0x310 kernel/fork.c:1179 mmput+0x5b/0x170 kernel/fork.c:1202 exit_mm kernel/exit.c:552 [inline] do_exit+0xb9c/0x2ca0 kernel/exit.c:865 do_group_exit+0x141/0x310 kernel/exit.c:1000 get_signal+0x7a3/0x1630 kernel/signal.c:2896 arch_do_signal_or_restart+0xbd/0x1680 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop+0xa0/0xe0 kernel/entry/common.c:172 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:208 irqentry_exit_to_user_mode+0x9/0x20 kernel/entry/common.c:314 irqentry_exit+0x12/0x40 kernel/entry/common.c:405 exc_page_fault+0x47a/0x830 arch/x86/mm/fault.c:1608 asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:568 RIP: 0033:0xf34443dab3 Code: Unable to access opcode bytes at RIP 0xf34443da89. RSP: 002b:0000000020000288 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f421aaccf80 RCX: 00007f421a99eda9 RDX: 0000000020000100 RSI: 0000000020000280 RDI: 0000000016020000 RBP: 00007f421a9eb47a R08: 00000000200002c0 R09: 00000000200002c0 R10: 0000000020000140 R11: 0000000000000206 R12: 0000000000000000 R13: 000000000000000b R14: 00007f421aaccf80 R15: 00007ffdf9d870e8 Modules linked in: ---[ end trace 5e9d59ca6eb9a2be ]--- RIP: 0010:____rb_erase_color lib/rbtree.c:242 [inline] RIP: 0010:__rb_erase_color+0x60/0xa60 lib/rbtree.c:413 Code: 03 48 89 45 c8 42 80 3c 20 00 74 08 48 89 df e8 86 29 2b ff 4c 8b 33 4d 39 f7 0f 84 87 01 00 00 4c 89 e0 4d 89 f4 49 c1 ec 03 <41> 80 3c 04 00 74 08 4c 89 f7 e8 61 29 2b ff 48 89 5d a8 41 f6 06 RSP: 0018:ffffc900019d7580 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88810e3fd878 RCX: ffff8881da6762c0 RDX: ffffffff81a50880 RSI: ffff88810bdd9aa8 RDI: ffff88811a6e33d0 RBP: ffffc900019d75e0 R08: ffffffff81a4e940 R09: ffffed10217bb359 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: ffff88810e3fd870 R14: 0000000000000000 R15: ffff88811a6e33d0 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f421aa9ffe0 CR3: 0000000100290000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 03 48 89 add -0x77(%rax),%ecx 3: 45 c8 42 80 3c rex.RB enter $0x8042,$0x3c 8: 20 00 and %al,(%rax) a: 74 08 je 0x14 c: 48 89 df mov %rbx,%rdi f: e8 86 29 2b ff call 0xff2b299a 14: 4c 8b 33 mov (%rbx),%r14 17: 4d 39 f7 cmp %r14,%r15 1a: 0f 84 87 01 00 00 je 0x1a7 20: 4c 89 e0 mov %r12,%rax 23: 4d 89 f4 mov %r14,%r12 26: 49 c1 ec 03 shr $0x3,%r12 * 2a: 41 80 3c 04 00 cmpb $0x0,(%r12,%rax,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 f7 mov %r14,%rdi 34: e8 61 29 2b ff call 0xff2b299a 39: 48 89 5d a8 mov %rbx,-0x58(%rbp) 3d: 41 rex.B 3e: f6 .byte 0xf6 3f: 06 (bad)