syzkaller login: [ 38.652538] BUG: Bad rss-counter state mm:00000000ad07b408 type:MM_FILEPAGES val:33 [ 38.653950] BUG: Bad rss-counter state mm:00000000ad07b408 type:MM_ANONPAGES val:22 [ 38.834452] ================================================================== [ 38.835575] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.836838] Read of size 8 at addr ffff88800f2865c8 by task sshd/219 [ 38.837646] [ 38.837878] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.838821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.839861] Call Trace: [ 38.840199] [ 38.840498] dump_stack_lvl+0x91/0xf0 [ 38.841011] print_report+0xcc/0x620 [ 38.841514] ? __virt_addr_valid+0x102/0x340 [ 38.842100] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.842744] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.843396] kasan_report+0xbe/0xf0 [ 38.843908] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.844557] vma_interval_tree_remove+0xc75/0xec0 [ 38.845198] vma_prepare+0xc54/0x11a0 [ 38.845697] __split_vma+0x5af/0x950 [ 38.846196] ? __pfx___split_vma+0x10/0x10 [ 38.846749] ? find_held_lock+0x2c/0x110 [ 38.847295] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.847923] ? lock_is_held_type+0x9f/0x120 [ 38.848484] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.849126] ? mtree_range_walk+0x632/0x900 [ 38.849701] ? mas_walk+0x5c7/0x7c0 [ 38.850193] do_vmi_munmap+0x1f1/0x2b0 [ 38.850704] mmap_region+0x1f9/0x2660 [ 38.851201] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.851738] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.852483] ? __pfx_lock_acquire+0x10/0x10 [ 38.853034] ? __pfx_mmap_region+0x10/0x10 [ 38.853579] ? security_mmap_addr+0x7d/0xa0 [ 38.854132] ? get_unmapped_area+0x1f5/0x3f0 [ 38.854697] do_mmap+0x854/0xf00 [ 38.855156] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.855665] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.856261] ksys_mmap_pgoff+0x3af/0x500 [ 38.856790] do_syscall_64+0x3f/0x90 [ 38.857290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.857965] RIP: 0033:0x7f8f3a092d82 [ 38.858440] 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 [ 38.860676] RSP: 002b:00007ffdf83e44d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.861620] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f3a092d82 [ 38.862511] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f394cc000 [ 38.863396] RBP: 00007f8f394cc000 R08: 0000000000000009 R09: 0000000000001000 [ 38.864287] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd380b9ec0 [ 38.865179] R13: 00007ffdf83e44f0 R14: 00007ffdf83e4520 R15: 00007ffdf83e4880 [ 38.866078] [ 38.866388] [ 38.866610] Allocated by task 212: [ 38.867058] kasan_save_stack+0x22/0x50 [ 38.867577] kasan_set_track+0x25/0x30 [ 38.868091] __kasan_slab_alloc+0x59/0x70 [ 38.868627] kmem_cache_alloc+0x16b/0x370 [ 38.869167] vm_area_dup+0x20/0x160 [ 38.869635] __split_vma+0x170/0x950 [ 38.870114] split_vma+0xc6/0x110 [ 38.870565] mprotect_fixup+0x8d2/0xb30 [ 38.871081] do_mprotect_pkey+0x87e/0xd40 [ 38.871613] __x64_sys_mprotect+0x78/0xc0 [ 38.872168] do_syscall_64+0x3f/0x90 [ 38.872665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.873336] [ 38.873563] Freed by task 212: [ 38.873973] kasan_save_stack+0x22/0x50 [ 38.874500] kasan_set_track+0x25/0x30 [ 38.875015] kasan_save_free_info+0x2b/0x50 [ 38.875566] __kasan_slab_free+0x10a/0x190 [ 38.876132] kmem_cache_free+0x10d/0x4d0 [ 38.876669] rcu_core+0x8c8/0x2860 [ 38.877135] __do_softirq+0x1b7/0x7d4 [ 38.877628] [ 38.877859] Last potentially related work creation: [ 38.878462] kasan_save_stack+0x22/0x50 [ 38.878987] __kasan_record_aux_stack+0x8e/0xa0 [ 38.879584] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.880249] remove_vma+0x139/0x170 [ 38.880716] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.881299] do_vmi_munmap+0x1f1/0x2b0 [ 38.881811] __vm_munmap+0x138/0x3a0 [ 38.882325] __x64_sys_munmap+0x59/0x80 [ 38.882865] do_syscall_64+0x3f/0x90 [ 38.883366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.884078] [ 38.884309] Second to last potentially related work creation: [ 38.885023] kasan_save_stack+0x22/0x50 [ 38.885549] __kasan_record_aux_stack+0x8e/0xa0 [ 38.886155] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.886824] remove_vma+0x139/0x170 [ 38.887302] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.887891] do_vmi_munmap+0x1f1/0x2b0 [ 38.888409] mmap_region+0x1f9/0x2660 [ 38.888909] do_mmap+0x854/0xf00 [ 38.889361] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.889874] ksys_mmap_pgoff+0x3af/0x500 [ 38.890399] do_syscall_64+0x3f/0x90 [ 38.890899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.891577] [ 38.891820] The buggy address belongs to the object at ffff88800f286570 [ 38.891820] which belongs to the cache vm_area_struct of size 168 [ 38.893395] The buggy address is located 88 bytes inside of [ 38.893395] freed 168-byte region [ffff88800f286570, ffff88800f286618) [ 38.894898] [ 38.895129] The buggy address belongs to the physical page: [ 38.895850] page:00000000b4179513 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf286 [ 38.896991] memcg:ffff88800eeb9b01 [ 38.897428] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.898098] page_type: 0xffffffff() [ 38.898572] raw: 0100000000000200 ffff8880087a0c80 ffffea000034c140 dead000000000008 [ 38.899515] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeb9b01 [ 38.900461] page dumped because: kasan: bad access detected [ 38.901153] [ 38.901375] Memory state around the buggy address: [ 38.901964] ffff88800f286480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.902835] ffff88800f286500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.903701] >ffff88800f286580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.904575] ^ [ 38.905256] ffff88800f286600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.906124] ffff88800f286680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.906989] ================================================================== [ 38.908175] Disabling lock debugging due to kernel taint [ 41.027454] BUG: Bad rss-counter state mm:00000000cff88b59 type:MM_FILEPAGES val:33 [ 41.028653] BUG: Bad rss-counter state mm:00000000cff88b59 type:MM_ANONPAGES val:22 [ 41.447006] BUG: Bad rss-counter state mm:00000000dfb9c125 type:MM_FILEPAGES val:33 [ 41.448055] BUG: Bad rss-counter state mm:00000000dfb9c125 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59283' (ECDSA) to the list of known hosts. 2023/06/21 04:55:52 fuzzer started 2023/06/21 04:55:52 dialing manager at localhost:36067 2023/06/21 04:55:52 checking machine... 2023/06/21 04:55:52 checking revisions... [ 42.244046] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:55:52 testing simple program... [ 42.301454] cgroup: Unknown subsys name 'net' [ 42.359833] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:55:52 Registers: info registers vcpu 0 RAX=ffffffff8100455c RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110011b3f31 RSI=ffff888008d9ff28 RDI=ffffffff8100455c RBP=ffff888008d9f988 RSP=ffff888008d9f920 R8 =0000000000000001 R9 =ffff888008d9f970 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008d9f9f8 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800d690280 RIP=ffffffff811303b9 RFL=00000246 [---Z-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 0000000000000000 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=00007f4baee5b650 CR3=0000000016cbe000 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=35353a3430203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732032353a3535 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363138 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888016d47038 RCX=0000000000000000 RDX=00000000fffb96d0 RSI=ffff888016d47028 RDI=ffff888016d47018 RBP=ffff888016d47000 RSP=ffff8880094dfa18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffff8880094dfc68 R13=00000000fffb96d0 R14=ffff888016d47058 R15=ffff888016d47028 RIP=ffffffff81922442 RFL=00000293 [--S-A-C] 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 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=00007f3122c1a4a0 CR3=000000000d9a0000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0bcd71d5a1a719e700000000000ae988 XMM05=7a61381ff55fe01b00000000001340c8 XMM06=dfcdbad4f1609c370000000000132bf0 XMM07=fb795ef6d65770560000000000121d98 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000