syzkaller login: [ 30.960199] BUG: Bad rss-counter state mm:000000001dfa66e7 type:MM_FILEPAGES val:33 [ 30.961418] BUG: Bad rss-counter state mm:000000001dfa66e7 type:MM_ANONPAGES val:22 [ 30.996467] ================================================================== [ 30.997606] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.998648] Read of size 8 at addr ffff888016d3a058 by task sshd/221 [ 30.999444] [ 30.999674] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.000579] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.001637] Call Trace: [ 31.002023] [ 31.002387] dump_stack_lvl+0x91/0xf0 [ 31.002904] print_report+0xcc/0x620 [ 31.003380] ? __virt_addr_valid+0x102/0x340 [ 31.003920] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.004539] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.005142] kasan_report+0xbe/0xf0 [ 31.005617] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.006250] vma_interval_tree_remove+0xc75/0xec0 [ 31.006849] vma_prepare+0xc54/0x11a0 [ 31.007317] __split_vma+0x5af/0x950 [ 31.007912] ? __pfx___split_vma+0x10/0x10 [ 31.008448] ? find_held_lock+0x2c/0x110 [ 31.008976] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.009542] ? lock_is_held_type+0x9f/0x120 [ 31.010099] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.010711] ? mtree_range_walk+0x632/0x900 [ 31.011254] ? mas_walk+0x5c7/0x7c0 [ 31.011726] do_vmi_munmap+0x1f1/0x2b0 [ 31.012223] mmap_region+0x1f9/0x2660 [ 31.012709] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.013225] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.013920] ? __pfx_lock_acquire+0x10/0x10 [ 31.014473] ? __pfx_mmap_region+0x10/0x10 [ 31.014997] ? security_mmap_addr+0x7d/0xa0 [ 31.015518] ? get_unmapped_area+0x1f5/0x3f0 [ 31.016055] do_mmap+0x854/0xf00 [ 31.016485] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.016977] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.017534] ksys_mmap_pgoff+0x3af/0x500 [ 31.018035] do_syscall_64+0x3f/0x90 [ 31.018515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.019156] RIP: 0033:0x7f693a07ed82 [ 31.019618] 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 [ 31.021709] RSP: 002b:00007ffc84049368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.022629] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f693a07ed82 [ 31.023479] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69394b8000 [ 31.024318] RBP: 00007f69394b8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.025154] R10: 0000000000000812 R11: 0000000000000206 R12: 00005599db98dd90 [ 31.025989] R13: 00007ffc84049380 R14: 00007ffc840493b0 R15: 00007ffc84049710 [ 31.026850] [ 31.027138] [ 31.027352] Allocated by task 214: [ 31.027773] kasan_save_stack+0x22/0x50 [ 31.028276] kasan_set_track+0x25/0x30 [ 31.028763] __kasan_slab_alloc+0x59/0x70 [ 31.029277] kmem_cache_alloc+0x16b/0x370 [ 31.029787] vm_area_dup+0x20/0x160 [ 31.030245] __split_vma+0x170/0x950 [ 31.030708] split_vma+0xc6/0x110 [ 31.031152] mprotect_fixup+0x8d2/0xb30 [ 31.031647] do_mprotect_pkey+0x87e/0xd40 [ 31.032156] __x64_sys_mprotect+0x78/0xc0 [ 31.032672] do_syscall_64+0x3f/0x90 [ 31.033137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.033779] [ 31.033997] Freed by task 214: [ 31.034387] kasan_save_stack+0x22/0x50 [ 31.034884] kasan_set_track+0x25/0x30 [ 31.035377] kasan_save_free_info+0x2b/0x50 [ 31.035903] __kasan_slab_free+0x10a/0x190 [ 31.036431] kmem_cache_free+0x10d/0x4d0 [ 31.036940] rcu_core+0x8c8/0x2860 [ 31.037373] __do_softirq+0x1b7/0x7d4 [ 31.037843] [ 31.038059] Last potentially related work creation: [ 31.038657] kasan_save_stack+0x22/0x50 [ 31.039165] __kasan_record_aux_stack+0x8e/0xa0 [ 31.039729] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.040359] remove_vma+0x139/0x170 [ 31.040800] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.041360] do_vmi_munmap+0x1f1/0x2b0 [ 31.041843] __vm_munmap+0x138/0x3a0 [ 31.042314] __x64_sys_munmap+0x59/0x80 [ 31.042809] do_syscall_64+0x3f/0x90 [ 31.043273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.043907] [ 31.044124] The buggy address belongs to the object at ffff888016d3a000 [ 31.044124] which belongs to the cache vm_area_struct of size 168 [ 31.045601] The buggy address is located 88 bytes inside of [ 31.045601] freed 168-byte region [ffff888016d3a000, ffff888016d3a0a8) [ 31.047018] [ 31.047228] The buggy address belongs to the physical page: [ 31.047885] page:00000000bed1e91b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d3a [ 31.048969] memcg:ffff88800c5c9301 [ 31.049392] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.050016] page_type: 0xffffffff() [ 31.050464] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.051378] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5c9301 [ 31.052277] page dumped because: kasan: bad access detected [ 31.052937] [ 31.053146] Memory state around the buggy address: [ 31.053725] ffff888016d39f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.054580] ffff888016d39f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.055428] >ffff888016d3a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.056280] ^ [ 31.056997] ffff888016d3a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.057846] ffff888016d3a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.058713] ================================================================== [ 31.059844] Disabling lock debugging due to kernel taint [ 33.517736] BUG: Bad rss-counter state mm:0000000004b6f803 type:MM_FILEPAGES val:33 [ 33.518819] BUG: Bad rss-counter state mm:0000000004b6f803 type:MM_ANONPAGES val:22 [ 33.962234] BUG: Bad rss-counter state mm:000000004d4af3ab type:MM_FILEPAGES val:33 [ 33.963284] BUG: Bad rss-counter state mm:000000004d4af3ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12805' (ECDSA) to the list of known hosts. 2023/06/20 16:13:05 fuzzer started 2023/06/20 16:13:05 dialing manager at localhost:36067 2023/06/20 16:13:05 checking machine... 2023/06/20 16:13:05 checking revisions... [ 34.696537] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:13:05 testing simple program... [ 34.755967] cgroup: Unknown subsys name 'net' [ 34.796564] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:13:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff86098094 RBP=ffff888015997788 RSP=ffff888015997670 R8 =0000000000000001 R9 =ffff888015997770 R10=0000000000038001 R11=0000000000006097 R12=ffff888015997790 R13=ffff888015997778 R14=ffff888015997730 R15=ffff888015997730 RIP=ffffffff81131202 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 00007f711df2a900 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=00007ffd61d6a000 CR3=00000000102be000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f3e928ea5b0 CR3=000000000da2e000 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=e5edb8ec65e0dbac8b4a7bfaabe70cb5 XMM02=2c67c8bc2e329bc3000000000011b348 XMM03=fb795ef6d65770560000000000122128 XMM04=47d1d55730965d2b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131f68 XMM06=3d84d4205d7ca30c0000000000130dd0 XMM07=e042d86d42eb936e00000000001223a8 XMM08=cafa6e86a3280ba0000000000011b3a8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000