syzkaller login: [ 38.825442] BUG: Bad rss-counter state mm:00000000c6610843 type:MM_FILEPAGES val:33 [ 38.826477] BUG: Bad rss-counter state mm:00000000c6610843 type:MM_ANONPAGES val:22 [ 38.865067] ================================================================== [ 38.866051] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.867006] Read of size 8 at addr ffff88800f00eed8 by task sshd/219 [ 38.867815] [ 38.868040] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.868927] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.869948] Call Trace: [ 38.870282] [ 38.870574] dump_stack_lvl+0x91/0xf0 [ 38.871081] print_report+0xcc/0x620 [ 38.871572] ? __virt_addr_valid+0x102/0x340 [ 38.872135] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.872781] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.873421] kasan_report+0xbe/0xf0 [ 38.873912] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.874551] vma_interval_tree_remove+0xc75/0xec0 [ 38.875162] vma_prepare+0xc54/0x11a0 [ 38.875652] __split_vma+0x5af/0x950 [ 38.876130] ? __pfx___split_vma+0x10/0x10 [ 38.876676] ? find_held_lock+0x2c/0x110 [ 38.877212] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.877795] ? lock_is_held_type+0x9f/0x120 [ 38.878351] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.878982] ? mtree_range_walk+0x632/0x900 [ 38.879557] ? mas_walk+0x5c7/0x7c0 [ 38.880051] do_vmi_munmap+0x1f1/0x2b0 [ 38.880557] mmap_region+0x1f9/0x2660 [ 38.881057] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.881581] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.882323] ? __pfx_lock_acquire+0x10/0x10 [ 38.882865] ? __pfx_mmap_region+0x10/0x10 [ 38.883406] ? security_mmap_addr+0x7d/0xa0 [ 38.883945] ? get_unmapped_area+0x1f5/0x3f0 [ 38.884498] do_mmap+0x854/0xf00 [ 38.884949] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.885454] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.886035] ksys_mmap_pgoff+0x3af/0x500 [ 38.886556] do_syscall_64+0x3f/0x90 [ 38.887052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.887722] RIP: 0033:0x7fb004559d82 [ 38.888204] 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 [ 38.890401] RSP: 002b:00007ffc3e544608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.891323] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb004559d82 [ 38.892195] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb003993000 [ 38.893072] RBP: 00007fb003993000 R08: 0000000000000009 R09: 0000000000001000 [ 38.893948] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563be1fa5ec0 [ 38.894814] R13: 00007ffc3e544620 R14: 00007ffc3e544650 R15: 00007ffc3e5449b0 [ 38.895694] [ 38.895989] [ 38.896207] Allocated by task 212: [ 38.896648] kasan_save_stack+0x22/0x50 [ 38.897166] kasan_set_track+0x25/0x30 [ 38.897675] __kasan_slab_alloc+0x59/0x70 [ 38.898234] kmem_cache_alloc+0x16b/0x370 [ 38.898762] vm_area_dup+0x20/0x160 [ 38.899220] __split_vma+0x170/0x950 [ 38.899696] split_vma+0xc6/0x110 [ 38.900149] mprotect_fixup+0x8d2/0xb30 [ 38.900665] do_mprotect_pkey+0x87e/0xd40 [ 38.901203] __x64_sys_mprotect+0x78/0xc0 [ 38.901735] do_syscall_64+0x3f/0x90 [ 38.902226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902878] [ 38.903098] Freed by task 212: [ 38.903504] kasan_save_stack+0x22/0x50 [ 38.904020] kasan_set_track+0x25/0x30 [ 38.904521] kasan_save_free_info+0x2b/0x50 [ 38.905073] __kasan_slab_free+0x10a/0x190 [ 38.905618] kmem_cache_free+0x10d/0x4d0 [ 38.906137] rcu_core+0x8c8/0x2860 [ 38.906595] __do_softirq+0x1b7/0x7d4 [ 38.907091] [ 38.907317] Last potentially related work creation: [ 38.907915] kasan_save_stack+0x22/0x50 [ 38.908434] __kasan_record_aux_stack+0x8e/0xa0 [ 38.909032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.909682] remove_vma+0x139/0x170 [ 38.910172] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.910757] do_vmi_munmap+0x1f1/0x2b0 [ 38.911265] __vm_munmap+0x138/0x3a0 [ 38.911743] __x64_sys_munmap+0x59/0x80 [ 38.912249] do_syscall_64+0x3f/0x90 [ 38.912733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913390] [ 38.913609] The buggy address belongs to the object at ffff88800f00ee80 [ 38.913609] which belongs to the cache vm_area_struct of size 168 [ 38.915108] The buggy address is located 88 bytes inside of [ 38.915108] freed 168-byte region [ffff88800f00ee80, ffff88800f00ef28) [ 38.916545] [ 38.916768] The buggy address belongs to the physical page: [ 38.917441] page:00000000564c6bd3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf00e [ 38.918570] memcg:ffff88800e0e3501 [ 38.919008] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.919722] page_type: 0xffffffff() [ 38.920182] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.921123] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0e3501 [ 38.922063] page dumped because: kasan: bad access detected [ 38.922737] [ 38.922956] Memory state around the buggy address: [ 38.923543] ffff88800f00ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.924415] ffff88800f00ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.925286] >ffff88800f00ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.926171] ^ [ 38.926917] ffff88800f00ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.927783] ffff88800f00ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.928651] ================================================================== [ 38.929632] Disabling lock debugging due to kernel taint [ 41.869223] BUG: Bad rss-counter state mm:000000002ddf8b69 type:MM_FILEPAGES val:33 [ 41.870896] BUG: Bad rss-counter state mm:000000002ddf8b69 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29157' (ECDSA) to the list of known hosts. [ 42.455913] BUG: Bad rss-counter state mm:00000000108000a3 type:MM_FILEPAGES val:33 [ 42.457027] BUG: Bad rss-counter state mm:00000000108000a3 type:MM_ANONPAGES val:22 2023/06/20 12:50:15 fuzzer started 2023/06/20 12:50:15 dialing manager at localhost:36067 2023/06/20 12:50:15 checking machine... 2023/06/20 12:50:15 checking revisions... [ 43.099762] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:50:16 testing simple program... [ 43.149003] cgroup: Unknown subsys name 'net' [ 43.199697] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:50:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11003961f6c RSI=ffffffff81ec6a5a RDI=ffff88801cb0fbd0 RBP=ffff88801cb0fba0 RSP=ffff88801cb0faf8 R8 =0000000000000001 R9 =ffff88801cb0fb48 R10=0000000000038001 R11=0000000000037fbf R12=ffff88801cb0fbd0 R13=0000000000000000 R14=ffff88800e698000 R15=0000000000000000 RIP=ffffffff813ad47f RFL=00000286 [--S--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 00007fe7e7bd4900 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=00007fe7e7b8801c CR3=00000000191f0000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffc8f3d9fd8 CR3=000000000de6e000 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=2035313a30353a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a30353a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000