Hello, syzbot found the following issue on: HEAD commit: bdc61aad77fa Add linux-next specific files for 20220428 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1196c4bcf00000 kernel config: https://syzkaller.appspot.com/x/.config?x=87767e89da13a759 dashboard link: https://syzkaller.appspot.com/bug?extid=ee1fdd8dcc770a3a169a compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 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+ee1fdd8dcc770a3a169a@xxxxxxxxxxxxxxxxxxxxxxxxx RBP: 0000000020000000 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000000008011 R11: 0000000000000206 R12: 0000000020000800 R13: 0000000020000000 R14: 00000000200007c0 R15: 0000000020000000 </TASK> general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 32272 Comm: syz-executor.4 Not tainted 5.18.0-rc4-next-20220428-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rb_set_parent_color include/linux/rbtree_augmented.h:165 [inline] RIP: 0010:____rb_erase_color lib/rbtree.c:359 [inline] RIP: 0010:__rb_erase_color+0x2fd/0xdb0 lib/rbtree.c:413 Code: 00 4d 89 ec 4d 8b 6d 10 e9 ac fd ff ff 4c 89 60 10 eb be 4c 89 e9 48 89 e8 4c 89 6d 10 48 c1 e9 03 49 89 6c 24 08 48 83 c8 01 <80> 3c 19 00 0f 85 1d 08 00 00 49 89 45 00 48 89 e8 48 c1 e8 03 80 RSP: 0018:ffffc900149ffa48 EFLAGS: 00010286 RAX: ffff88801f3fbb21 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffffed1002fe1617 RSI: ffff888017f0b0b8 RDI: ffff8880790928a0 RBP: ffff88801f3fbb20 R08: ffff88801f3fbb30 R09: ffff888017f0b0af R10: ffffffff81b01168 R11: 0000000000000001 R12: ffff888079092898 R13: 0000000000000000 R14: ffff888017f0b0b8 R15: ffffffff81afff50 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000001da88000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> 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+0x694/0xed0 mm/interval_tree.c:23 __remove_shared_vm_struct mm/mmap.c:160 [inline] unlink_file_vma+0xbd/0x110 mm/mmap.c:175 free_pgtables+0x255/0x420 mm/memory.c:440 exit_mmap+0x1ff/0x740 mm/mmap.c:3148 __mmput+0xe4/0x460 kernel/fork.c:1175 mmput+0x5c/0x70 kernel/fork.c:1197 exit_mm kernel/exit.c:510 [inline] do_exit+0xa18/0x2a00 kernel/exit.c:782 do_group_exit+0xd2/0x2f0 kernel/exit.c:925 __do_sys_exit_group kernel/exit.c:936 [inline] __se_sys_exit_group kernel/exit.c:934 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:934 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f858fe890e9 Code: Unable to access opcode bytes at RIP 0x7f858fe890bf. RSP: 002b:00007f85910bbaf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f858fe890e9 RDX: 00007f858fe89132 RSI: 0000000000000000 RDI: 000000000000000b RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000246 R12: 0000000020000800 R13: 0000000020000000 R14: 00000000200007c0 R15: 0000000020000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:rb_set_parent_color include/linux/rbtree_augmented.h:165 [inline] RIP: 0010:____rb_erase_color lib/rbtree.c:359 [inline] RIP: 0010:__rb_erase_color+0x2fd/0xdb0 lib/rbtree.c:413 Code: 00 4d 89 ec 4d 8b 6d 10 e9 ac fd ff ff 4c 89 60 10 eb be 4c 89 e9 48 89 e8 4c 89 6d 10 48 c1 e9 03 49 89 6c 24 08 48 83 c8 01 <80> 3c 19 00 0f 85 1d 08 00 00 49 89 45 00 48 89 e8 48 c1 e8 03 80 RSP: 0018:ffffc900149ffa48 EFLAGS: 00010286 RAX: ffff88801f3fbb21 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffffed1002fe1617 RSI: ffff888017f0b0b8 RDI: ffff8880790928a0 RBP: ffff88801f3fbb20 R08: ffff88801f3fbb30 R09: ffff888017f0b0af R10: ffffffff81b01168 R11: 0000000000000001 R12: ffff888079092898 R13: 0000000000000000 R14: ffff888017f0b0b8 R15: ffffffff81afff50 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000001da88000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 4d 89 add %cl,-0x77(%rbp) 3: ec in (%dx),%al 4: 4d 8b 6d 10 mov 0x10(%r13),%r13 8: e9 ac fd ff ff jmpq 0xfffffdb9 d: 4c 89 60 10 mov %r12,0x10(%rax) 11: eb be jmp 0xffffffd1 13: 4c 89 e9 mov %r13,%rcx 16: 48 89 e8 mov %rbp,%rax 19: 4c 89 6d 10 mov %r13,0x10(%rbp) 1d: 48 c1 e9 03 shr $0x3,%rcx 21: 49 89 6c 24 08 mov %rbp,0x8(%r12) 26: 48 83 c8 01 or $0x1,%rax * 2a: 80 3c 19 00 cmpb $0x0,(%rcx,%rbx,1) <-- trapping instruction 2e: 0f 85 1d 08 00 00 jne 0x851 34: 49 89 45 00 mov %rax,0x0(%r13) 38: 48 89 e8 mov %rbp,%rax 3b: 48 c1 e8 03 shr $0x3,%rax 3f: 80 .byte 0x80 --- 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.
