syzkaller login: [ 31.015388] BUG: Bad rss-counter state mm:0000000028987056 type:MM_FILEPAGES val:33 [ 31.017425] BUG: Bad rss-counter state mm:0000000028987056 type:MM_ANONPAGES val:22 [ 31.178879] ================================================================== [ 31.179963] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.181086] Read of size 8 at addr ffff88800eaa8968 by task sshd/221 [ 31.182120] [ 31.182347] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.183206] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.184199] Call Trace: [ 31.184520] [ 31.184808] dump_stack_lvl+0x91/0xf0 [ 31.185322] print_report+0xcc/0x620 [ 31.185806] ? __virt_addr_valid+0x102/0x340 [ 31.186360] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.186975] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187596] kasan_report+0xbe/0xf0 [ 31.188079] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.188710] vma_interval_tree_remove+0xc75/0xec0 [ 31.189327] vma_prepare+0xc54/0x11a0 [ 31.189807] __split_vma+0x5af/0x950 [ 31.190304] ? __pfx___split_vma+0x10/0x10 [ 31.190829] ? find_held_lock+0x2c/0x110 [ 31.191385] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.191969] ? lock_is_held_type+0x9f/0x120 [ 31.192512] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.193116] ? mtree_range_walk+0x632/0x900 [ 31.193692] ? mas_walk+0x5c7/0x7c0 [ 31.194171] do_vmi_munmap+0x1f1/0x2b0 [ 31.194669] mmap_region+0x1f9/0x2660 [ 31.195159] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.195684] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.196395] ? __pfx_lock_acquire+0x10/0x10 [ 31.196931] ? __pfx_mmap_region+0x10/0x10 [ 31.197471] ? security_mmap_addr+0x7d/0xa0 [ 31.198017] ? get_unmapped_area+0x1f5/0x3f0 [ 31.198566] do_mmap+0x854/0xf00 [ 31.199009] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.199506] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.200071] ksys_mmap_pgoff+0x3af/0x500 [ 31.200579] do_syscall_64+0x3f/0x90 [ 31.201059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.201714] RIP: 0033:0x7f5c82905d82 [ 31.202171] 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 [ 31.204289] RSP: 002b:00007ffdf32f9498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.205208] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c82905d82 [ 31.206066] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c81d3f000 [ 31.206906] RBP: 00007f5c81d3f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.207746] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da913abec0 [ 31.208587] R13: 00007ffdf32f94b0 R14: 00007ffdf32f94e0 R15: 00007ffdf32f9840 [ 31.209460] [ 31.209749] [ 31.209962] Allocated by task 214: [ 31.210385] kasan_save_stack+0x22/0x50 [ 31.210887] kasan_set_track+0x25/0x30 [ 31.211391] __kasan_slab_alloc+0x59/0x70 [ 31.211921] kmem_cache_alloc+0x16b/0x370 [ 31.212441] vm_area_dup+0x20/0x160 [ 31.212901] __split_vma+0x170/0x950 [ 31.213388] split_vma+0xc6/0x110 [ 31.213829] mprotect_fixup+0x8d2/0xb30 [ 31.214336] do_mprotect_pkey+0x87e/0xd40 [ 31.214858] __x64_sys_mprotect+0x78/0xc0 [ 31.215377] do_syscall_64+0x3f/0x90 [ 31.215852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.216490] [ 31.216707] Freed by task 214: [ 31.217100] kasan_save_stack+0x22/0x50 [ 31.217610] kasan_set_track+0x25/0x30 [ 31.218115] kasan_save_free_info+0x2b/0x50 [ 31.218650] __kasan_slab_free+0x10a/0x190 [ 31.219196] kmem_cache_free+0x10d/0x4d0 [ 31.219712] rcu_core+0x8c8/0x2860 [ 31.220164] __do_softirq+0x1b7/0x7d4 [ 31.220648] [ 31.220863] Last potentially related work creation: [ 31.221462] kasan_save_stack+0x22/0x50 [ 31.221974] __kasan_record_aux_stack+0x8e/0xa0 [ 31.222544] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.223182] remove_vma+0x139/0x170 [ 31.223631] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.224190] do_vmi_munmap+0x1f1/0x2b0 [ 31.224670] __vm_munmap+0x138/0x3a0 [ 31.225136] __x64_sys_munmap+0x59/0x80 [ 31.225643] do_syscall_64+0x3f/0x90 [ 31.226123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.226772] [ 31.226984] Second to last potentially related work creation: [ 31.227672] kasan_save_stack+0x22/0x50 [ 31.228177] __kasan_record_aux_stack+0x8e/0xa0 [ 31.228764] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.229435] remove_vma+0x139/0x170 [ 31.229899] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.230475] do_vmi_munmap+0x1f1/0x2b0 [ 31.230966] mmap_region+0x1f9/0x2660 [ 31.231444] do_mmap+0x854/0xf00 [ 31.231870] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.232357] ksys_mmap_pgoff+0x3af/0x500 [ 31.232860] do_syscall_64+0x3f/0x90 [ 31.233360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234000] [ 31.234214] The buggy address belongs to the object at ffff88800eaa8910 [ 31.234214] which belongs to the cache vm_area_struct of size 168 [ 31.235670] The buggy address is located 88 bytes inside of [ 31.235670] freed 168-byte region [ffff88800eaa8910, ffff88800eaa89b8) [ 31.237057] [ 31.237286] The buggy address belongs to the physical page: [ 31.237946] page:0000000060994acb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeaa8 [ 31.239034] memcg:ffff88800f087401 [ 31.239463] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.240106] page_type: 0xffffffff() [ 31.240565] raw: 0100000000000200 ffff8880087a0c80 ffffea0000387640 dead000000000004 [ 31.241504] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f087401 [ 31.242408] page dumped because: kasan: bad access detected [ 31.243063] [ 31.243285] Memory state around the buggy address: [ 31.243871] ffff88800eaa8800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.244731] ffff88800eaa8880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.245610] >ffff88800eaa8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.246460] ^ [ 31.247243] ffff88800eaa8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.248096] ffff88800eaa8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.248948] ================================================================== [ 31.249931] Disabling lock debugging due to kernel taint [ 33.417434] BUG: Bad rss-counter state mm:000000000595b5f1 type:MM_FILEPAGES val:33 [ 33.418434] BUG: Bad rss-counter state mm:000000000595b5f1 type:MM_ANONPAGES val:22 [ 33.972785] BUG: Bad rss-counter state mm:00000000c9b4d2c5 type:MM_FILEPAGES val:33 [ 33.973913] BUG: Bad rss-counter state mm:00000000c9b4d2c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8553' (ECDSA) to the list of known hosts. 2023/06/20 18:15:40 fuzzer started 2023/06/20 18:15:40 dialing manager at localhost:36067 2023/06/20 18:15:40 checking machine... 2023/06/20 18:15:40 checking revisions... [ 34.659766] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:15:40 testing simple program... [ 34.714618] cgroup: Unknown subsys name 'net' [ 34.801319] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:15:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888014717590 RCX=0000000000000001 RDX=1ffff110028e2eb4 RSI=ffffffff846000aa RDI=ffff8880147175a0 RBP=ffff888014717560 RSP=ffff8880147174a8 R8 =0000000000000001 R9 =ffff888014717508 R10=0000000000038001 R11=00000000000b5080 R12=ffff888014717590 R13=0000000000000000 R14=ffff88800fdfd1c0 R15=0000000000000cc0 RIP=ffffffff813ad496 RFL=00000292 [--S-A--] 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 00007f7584741900 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=00007f7583b9e1c0 CR3=000000000f35c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=19d77d94034da43100000000000ae988 XMM05=025a2b421f92e4f50000000000134490 XMM06=c291bd5c70af25b90000000000133280 XMM07=fb795ef6d657705600000000001221c0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff81809a90 RDX=0000000000000003 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffff888015d87988 RSP=ffff888015d87878 R8 =ffffffff86138976 R9 =ffff888015d87970 R10=0000000000038001 R11=0000000000020cbd R12=ffffffff85dfdcc0 R13=ffff888015d87978 R14=ffff888015d87971 R15=ffff888015d87930 RIP=ffffffff8112fc27 RFL=00000206 [-----P-] 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 00007fd7dc829900 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=00007ffff6628000 CR3=000000001cd92000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000