Hello, syzbot found the following issue on: HEAD commit: 1fc596a56b33 Merge tag 'trace-v5.15-rc6' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1173759ab00000 kernel config: https://syzkaller.appspot.com/x/.config?x=9646ff3aa1daf1a8 dashboard link: https://syzkaller.appspot.com/bug?extid=11210d36738191856de4 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15d15ad4b00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=142a0b64b00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+11210d36738191856de4@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] CPU: 1 PID: 8652 Comm: syz-executor811 Not tainted 5.15.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0xd7d/0x54a0 kernel/locking/lockdep.c:4885 Code: e9 0d 41 be 01 00 00 00 0f 86 c8 00 00 00 89 05 f9 0b e9 0d e9 bd 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 f3 2f 00 00 48 81 3b 00 35 f0 8e 0f 84 52 f3 ff RSP: 0018:ffffc9000562f970 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 0000000000000018 RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888077151c80 R14: 0000000000000000 R15: 0000000000000000 FS: 0000555555f75300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdc1e38c38 CR3: 00000000780df000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:363 [inline] zap_pte_range mm/memory.c:1320 [inline] zap_pmd_range mm/memory.c:1481 [inline] zap_pud_range mm/memory.c:1510 [inline] zap_p4d_range mm/memory.c:1531 [inline] unmap_page_range+0x87b/0x2a10 mm/memory.c:1552 __oom_reap_task_mm+0x22d/0x400 mm/oom_kill.c:555 __do_sys_process_mrelease+0x32a/0x400 mm/oom_kill.c:1199 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: 0033:0x7faa3e405d29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdc1e38c38 EFLAGS: 00000246 ORIG_RAX: 00000000000001c0 RAX: ffffffffffffffda RBX: 0000000000011d9b RCX: 00007faa3e405d29 RDX: 00007faa3e405d29 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffdc1e38dd8 R09: 00007ffdc1e38dd8 R10: 00007ffdc1e38dd8 R11: 0000000000000246 R12: 00007ffdc1e38c4c R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 281cbdc141c02a9c ]--- RIP: 0010:__lock_acquire+0xd7d/0x54a0 kernel/locking/lockdep.c:4885 Code: e9 0d 41 be 01 00 00 00 0f 86 c8 00 00 00 89 05 f9 0b e9 0d e9 bd 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 f3 2f 00 00 48 81 3b 00 35 f0 8e 0f 84 52 f3 ff RSP: 0018:ffffc9000562f970 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 0000000000000018 RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888077151c80 R14: 0000000000000000 R15: 0000000000000000 FS: 0000555555f75300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdc1e38c38 CR3: 00000000780df000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 0d 41 be 01 00 or $0x1be41,%eax 5: 00 00 add %al,(%rax) 7: 0f 86 c8 00 00 00 jbe 0xd5 d: 89 05 f9 0b e9 0d mov %eax,0xde90bf9(%rip) # 0xde90c0c 13: e9 bd 00 00 00 jmpq 0xd5 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 48 89 da mov %rbx,%rdx 25: 48 c1 ea 03 shr $0x3,%rdx * 29: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2d: 0f 85 f3 2f 00 00 jne 0x3026 33: 48 81 3b 00 35 f0 8e cmpq $0xffffffff8ef03500,(%rbx) 3a: 0f .byte 0xf 3b: 84 52 f3 test %dl,-0xd(%rdx) 3e: ff .byte 0xff --- 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
