syzkaller login: [ 30.230026] BUG: Bad rss-counter state mm:00000000c68aed28 type:MM_FILEPAGES val:33 [ 30.231246] BUG: Bad rss-counter state mm:00000000c68aed28 type:MM_ANONPAGES val:22 [ 30.266399] ================================================================== [ 30.267466] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.268504] Read of size 8 at addr ffff88800f6ee798 by task sshd/219 [ 30.269423] [ 30.269666] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.270583] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.271639] Call Trace: [ 30.271984] [ 30.272292] dump_stack_lvl+0x91/0xf0 [ 30.272831] print_report+0xcc/0x620 [ 30.273354] ? __virt_addr_valid+0x102/0x340 [ 30.273961] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.274643] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.275304] kasan_report+0xbe/0xf0 [ 30.275824] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.276489] vma_interval_tree_remove+0xc75/0xec0 [ 30.277130] vma_prepare+0xc54/0x11a0 [ 30.277632] __split_vma+0x5af/0x950 [ 30.278131] ? __pfx___split_vma+0x10/0x10 [ 30.278693] ? find_held_lock+0x2c/0x110 [ 30.279239] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.279835] ? lock_is_held_type+0x9f/0x120 [ 30.280420] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.281054] ? mtree_range_walk+0x632/0x900 [ 30.281639] ? mas_walk+0x5c7/0x7c0 [ 30.282135] do_vmi_munmap+0x1f1/0x2b0 [ 30.282660] mmap_region+0x1f9/0x2660 [ 30.283165] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.283711] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.284497] ? __pfx_lock_acquire+0x10/0x10 [ 30.285065] ? __pfx_mmap_region+0x10/0x10 [ 30.285640] ? security_mmap_addr+0x7d/0xa0 [ 30.286209] ? get_unmapped_area+0x1f5/0x3f0 [ 30.286797] do_mmap+0x854/0xf00 [ 30.287269] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.287790] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.288428] ksys_mmap_pgoff+0x3af/0x500 [ 30.288969] do_syscall_64+0x3f/0x90 [ 30.289477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.290171] RIP: 0033:0x7fbfff125d82 [ 30.290660] 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 [ 30.292931] RSP: 002b:00007ffd07ef5728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.293880] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbfff125d82 [ 30.294772] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbffe55f000 [ 30.295672] RBP: 00007fbffe55f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.296578] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560fd849eec0 [ 30.297467] R13: 00007ffd07ef5740 R14: 00007ffd07ef5770 R15: 00007ffd07ef5ad0 [ 30.298362] [ 30.298671] [ 30.298895] Allocated by task 212: [ 30.299341] kasan_save_stack+0x22/0x50 [ 30.299869] kasan_set_track+0x25/0x30 [ 30.300406] __kasan_slab_alloc+0x59/0x70 [ 30.300953] kmem_cache_alloc+0x16b/0x370 [ 30.301493] vm_area_dup+0x20/0x160 [ 30.301972] __split_vma+0x170/0x950 [ 30.302468] split_vma+0xc6/0x110 [ 30.302922] mprotect_fixup+0x8d2/0xb30 [ 30.303450] do_mprotect_pkey+0x87e/0xd40 [ 30.303992] __x64_sys_mprotect+0x78/0xc0 [ 30.304571] do_syscall_64+0x3f/0x90 [ 30.305067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.305737] [ 30.305960] Freed by task 212: [ 30.306369] kasan_save_stack+0x22/0x50 [ 30.306895] kasan_set_track+0x25/0x30 [ 30.307425] kasan_save_free_info+0x2b/0x50 [ 30.307995] __kasan_slab_free+0x10a/0x190 [ 30.308576] kmem_cache_free+0x10d/0x4d0 [ 30.309108] rcu_core+0x8c8/0x2860 [ 30.309572] __do_softirq+0x1b7/0x7d4 [ 30.310078] [ 30.310302] Last potentially related work creation: [ 30.310910] kasan_save_stack+0x22/0x50 [ 30.311447] __kasan_record_aux_stack+0x8e/0xa0 [ 30.312055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.312762] remove_vma+0x139/0x170 [ 30.313236] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.313817] do_vmi_munmap+0x1f1/0x2b0 [ 30.314323] __vm_munmap+0x138/0x3a0 [ 30.314814] __x64_sys_munmap+0x59/0x80 [ 30.315342] do_syscall_64+0x3f/0x90 [ 30.315842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.316532] [ 30.316766] The buggy address belongs to the object at ffff88800f6ee740 [ 30.316766] which belongs to the cache vm_area_struct of size 168 [ 30.318343] The buggy address is located 88 bytes inside of [ 30.318343] freed 168-byte region [ffff88800f6ee740, ffff88800f6ee7e8) [ 30.319807] [ 30.320035] The buggy address belongs to the physical page: [ 30.320735] page:000000005a5afb52 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf6ee [ 30.321861] memcg:ffff88800cae6c01 [ 30.322301] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.322992] page_type: 0xffffffff() [ 30.323470] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.324447] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cae6c01 [ 30.325403] page dumped because: kasan: bad access detected [ 30.326092] [ 30.326325] Memory state around the buggy address: [ 30.326930] ffff88800f6ee680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.327829] ffff88800f6ee700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.328746] >ffff88800f6ee780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.329644] ^ [ 30.330169] ffff88800f6ee800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.331076] ffff88800f6ee880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.331977] ================================================================== [ 30.333227] Disabling lock debugging due to kernel taint [ 32.421164] BUG: Bad rss-counter state mm:00000000c83b5ae1 type:MM_FILEPAGES val:33 [ 32.422160] BUG: Bad rss-counter state mm:00000000c83b5ae1 type:MM_ANONPAGES val:22 [ 32.980173] BUG: Bad rss-counter state mm:000000001028bed0 type:MM_FILEPAGES val:33 [ 32.981513] BUG: Bad rss-counter state mm:000000001028bed0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4931' (ECDSA) to the list of known hosts. 2023/06/20 16:06:24 fuzzer started 2023/06/20 16:06:24 dialing manager at localhost:36067 2023/06/20 16:06:24 checking machine... 2023/06/20 16:06:24 checking revisions... [ 33.654818] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:06:24 testing simple program... [ 33.715418] cgroup: Unknown subsys name 'net' [ 33.754098] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:06:24 Registers: info registers vcpu 0 RAX=ffffea00006ba3c0 RBX=0000000000000001 RCX=ffffffff816214c8 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffea00006ba3c0 RBP=ffffea00006ba3c0 RSP=ffff88801473fbd8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffffea00006ba3c0 R13=ffff88800ed50740 R14=ffff88801473fdb8 R15=ffffea00006ba3f4 RIP=ffffffff8180f032 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f70be0ff900 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=000055d69fb55ed8 CR3=000000000f220000 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=ffff888008c04400 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=00007ffeba6e6fe8 CR3=00000000146f8000 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=2033323a36303a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a36303a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000