syzkaller login: [ 29.967681] BUG: Bad rss-counter state mm:00000000e1164085 type:MM_FILEPAGES val:33 [ 29.968933] BUG: Bad rss-counter state mm:00000000e1164085 type:MM_ANONPAGES val:22 [ 30.128659] ================================================================== [ 30.129567] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.130499] Read of size 8 at addr ffff88800d2465c8 by task sshd/220 [ 30.131275] [ 30.131496] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.132509] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.133496] Call Trace: [ 30.133819] [ 30.134104] dump_stack_lvl+0x91/0xf0 [ 30.134593] print_report+0xcc/0x620 [ 30.135082] ? __virt_addr_valid+0x102/0x340 [ 30.135632] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.136254] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.136866] kasan_report+0xbe/0xf0 [ 30.137346] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.137954] vma_interval_tree_remove+0xc75/0xec0 [ 30.138549] vma_prepare+0xc54/0x11a0 [ 30.139024] __split_vma+0x5af/0x950 [ 30.139491] ? __pfx___split_vma+0x10/0x10 [ 30.140008] ? find_held_lock+0x2c/0x110 [ 30.140540] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.141096] ? lock_is_held_type+0x9f/0x120 [ 30.141630] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.142230] ? mtree_range_walk+0x632/0x900 [ 30.142777] ? mas_walk+0x5c7/0x7c0 [ 30.143256] do_vmi_munmap+0x1f1/0x2b0 [ 30.143753] mmap_region+0x1f9/0x2660 [ 30.144234] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.144741] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.145452] ? __pfx_lock_acquire+0x10/0x10 [ 30.145985] ? __pfx_mmap_region+0x10/0x10 [ 30.146517] ? security_mmap_addr+0x7d/0xa0 [ 30.147043] ? get_unmapped_area+0x1f5/0x3f0 [ 30.147599] do_mmap+0x854/0xf00 [ 30.148036] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.148541] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.149095] ksys_mmap_pgoff+0x3af/0x500 [ 30.149596] do_syscall_64+0x3f/0x90 [ 30.150070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.150709] RIP: 0033:0x7fc18c77ed82 [ 30.151161] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 30.153269] RSP: 002b:00007ffd7a02dff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.154172] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc18c77ed82 [ 30.155011] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc18bbb8000 [ 30.155850] RBP: 00007fc18bbb8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.156702] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9375fbec0 [ 30.157567] R13: 00007ffd7a02e010 R14: 00007ffd7a02e040 R15: 00007ffd7a02e3a0 [ 30.158416] [ 30.158706] [ 30.158919] Allocated by task 213: [ 30.159342] kasan_save_stack+0x22/0x50 [ 30.159838] kasan_set_track+0x25/0x30 [ 30.160353] __kasan_slab_alloc+0x59/0x70 [ 30.160873] kmem_cache_alloc+0x16b/0x370 [ 30.161382] vm_area_dup+0x20/0x160 [ 30.161829] __split_vma+0x170/0x950 [ 30.162293] split_vma+0xc6/0x110 [ 30.162733] mprotect_fixup+0x8d2/0xb30 [ 30.163230] do_mprotect_pkey+0x87e/0xd40 [ 30.163744] __x64_sys_mprotect+0x78/0xc0 [ 30.164272] do_syscall_64+0x3f/0x90 [ 30.164740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.165382] [ 30.165599] Freed by task 213: [ 30.165992] kasan_save_stack+0x22/0x50 [ 30.166492] kasan_set_track+0x25/0x30 [ 30.166978] kasan_save_free_info+0x2b/0x50 [ 30.167512] __kasan_slab_free+0x10a/0x190 [ 30.168036] kmem_cache_free+0x10d/0x4d0 [ 30.168561] rcu_core+0x8c8/0x2860 [ 30.169000] __do_softirq+0x1b7/0x7d4 [ 30.169472] [ 30.169685] Last potentially related work creation: [ 30.170266] kasan_save_stack+0x22/0x50 [ 30.170766] __kasan_record_aux_stack+0x8e/0xa0 [ 30.171336] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.171969] remove_vma+0x139/0x170 [ 30.172423] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.172972] do_vmi_munmap+0x1f1/0x2b0 [ 30.173451] __vm_munmap+0x138/0x3a0 [ 30.173916] __x64_sys_munmap+0x59/0x80 [ 30.174406] do_syscall_64+0x3f/0x90 [ 30.174874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.175510] [ 30.175722] The buggy address belongs to the object at ffff88800d246570 [ 30.175722] which belongs to the cache vm_area_struct of size 168 [ 30.177182] The buggy address is located 88 bytes inside of [ 30.177182] freed 168-byte region [ffff88800d246570, ffff88800d246618) [ 30.178572] [ 30.178785] The buggy address belongs to the physical page: [ 30.179436] page:000000007c675d51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd246 [ 30.180525] memcg:ffff88800e906d01 [ 30.180950] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.181646] page_type: 0xffffffff() [ 30.182091] raw: 0100000000000200 ffff8880087a0c80 ffffea00003809c0 dead000000000005 [ 30.182994] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e906d01 [ 30.183893] page dumped because: kasan: bad access detected [ 30.184554] [ 30.184766] Memory state around the buggy address: [ 30.185340] ffff88800d246480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.186184] ffff88800d246500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.187029] >ffff88800d246580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.187868] ^ [ 30.188544] ffff88800d246600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.189392] ffff88800d246680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.190237] ================================================================== [ 30.191324] Disabling lock debugging due to kernel taint [ 32.069801] BUG: Bad rss-counter state mm:00000000d8184a3b type:MM_FILEPAGES val:33 [ 32.070737] BUG: Bad rss-counter state mm:00000000d8184a3b type:MM_ANONPAGES val:22 [ 32.581357] BUG: Bad rss-counter state mm:000000000b42f15b type:MM_FILEPAGES val:33 [ 32.582555] BUG: Bad rss-counter state mm:000000000b42f15b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63082' (ECDSA) to the list of known hosts. 2023/06/21 03:21:15 fuzzer started 2023/06/21 03:21:15 dialing manager at localhost:36067 2023/06/21 03:21:15 checking machine... 2023/06/21 03:21:15 checking revisions... [ 33.316302] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:21:15 testing simple program... [ 33.370918] cgroup: Unknown subsys name 'net' [ 33.426305] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:21:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888017c3f520 RCX=0000000000000001 RDX=ffff888017c3f528 RSI=ffff888017c3faf0 RDI=ffff888017c3f528 RBP=ffff888017c3faf0 RSP=ffff888017c3f478 R8 =0000000000000001 R9 =ffff888017c3f560 R10=0000000000038001 R11=0000000000091af2 R12=0000000000000008 R13=ffff888017c3f568 R14=ffff888017c3faf0 R15=ffff888017c3f520 RIP=ffffffff8113043d RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1e5dce5900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f1e5e29c618 CR3=000000000d758000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f2383b0b3f0 CR3=000000000c936000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=a3cf4d25de8df596b845ef8af49fdc36 XMM02=000000000011a2f0ec2efd57dc4c00df XMM03=00000000001217580505497a9f918cdd XMM04=daddf86b194fe20100000000000ae988 XMM05=19e9129bd510f23500000000001315d0 XMM06=bef0ca0680383a720000000000130438 XMM07=e042d86d42eb936e00000000001219d8 XMM08=0505497a9f918cdd000000000011a350 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000