syzkaller login: [ 30.078626] BUG: Bad rss-counter state mm:000000002f2b24c3 type:MM_FILEPAGES val:33 [ 30.079923] BUG: Bad rss-counter state mm:000000002f2b24c3 type:MM_ANONPAGES val:22 [ 30.240572] ================================================================== [ 30.241671] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.242705] Read of size 8 at addr ffff88800ed6c968 by task sshd/220 [ 30.243578] [ 30.243801] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.244692] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.245714] Call Trace: [ 30.246053] [ 30.246347] dump_stack_lvl+0x91/0xf0 [ 30.246841] print_report+0xcc/0x620 [ 30.247335] ? __virt_addr_valid+0x102/0x340 [ 30.247896] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.248592] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.249226] kasan_report+0xbe/0xf0 [ 30.249728] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.250374] vma_interval_tree_remove+0xc75/0xec0 [ 30.250973] vma_prepare+0xc54/0x11a0 [ 30.251472] __split_vma+0x5af/0x950 [ 30.251949] ? __pfx___split_vma+0x10/0x10 [ 30.252494] ? find_held_lock+0x2c/0x110 [ 30.253019] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.253593] ? lock_is_held_type+0x9f/0x120 [ 30.254163] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.254780] ? mtree_range_walk+0x632/0x900 [ 30.255339] ? mas_walk+0x5c7/0x7c0 [ 30.255824] do_vmi_munmap+0x1f1/0x2b0 [ 30.256332] mmap_region+0x1f9/0x2660 [ 30.256821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.257337] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.258062] ? __pfx_lock_acquire+0x10/0x10 [ 30.258599] ? __pfx_mmap_region+0x10/0x10 [ 30.259156] ? security_mmap_addr+0x7d/0xa0 [ 30.259691] ? get_unmapped_area+0x1f5/0x3f0 [ 30.260235] do_mmap+0x854/0xf00 [ 30.260674] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.261177] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.261762] ksys_mmap_pgoff+0x3af/0x500 [ 30.262279] do_syscall_64+0x3f/0x90 [ 30.262769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.263412] RIP: 0033:0x7f7032ee0d82 [ 30.263877] 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 [ 30.266030] RSP: 002b:00007ffdd5c08228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.266940] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7032ee0d82 [ 30.267794] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f703231a000 [ 30.268647] RBP: 00007f703231a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.269495] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b770990ec0 [ 30.270375] R13: 00007ffdd5c08240 R14: 00007ffdd5c08270 R15: 00007ffdd5c085d0 [ 30.271239] [ 30.271541] [ 30.271755] Allocated by task 213: [ 30.272191] kasan_save_stack+0x22/0x50 [ 30.272699] kasan_set_track+0x25/0x30 [ 30.273189] __kasan_slab_alloc+0x59/0x70 [ 30.273721] kmem_cache_alloc+0x16b/0x370 [ 30.274247] vm_area_dup+0x20/0x160 [ 30.274706] __split_vma+0x170/0x950 [ 30.275171] split_vma+0xc6/0x110 [ 30.275611] mprotect_fixup+0x8d2/0xb30 [ 30.276117] do_mprotect_pkey+0x87e/0xd40 [ 30.276635] __x64_sys_mprotect+0x78/0xc0 [ 30.277152] do_syscall_64+0x3f/0x90 [ 30.277627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.278300] [ 30.278521] Freed by task 213: [ 30.278914] kasan_save_stack+0x22/0x50 [ 30.279419] kasan_set_track+0x25/0x30 [ 30.279914] kasan_save_free_info+0x2b/0x50 [ 30.280445] __kasan_slab_free+0x10a/0x190 [ 30.280982] kmem_cache_free+0x10d/0x4d0 [ 30.281492] rcu_core+0x8c8/0x2860 [ 30.281951] __do_softirq+0x1b7/0x7d4 [ 30.282431] [ 30.282641] Last potentially related work creation: [ 30.283231] kasan_save_stack+0x22/0x50 [ 30.283752] __kasan_record_aux_stack+0x8e/0xa0 [ 30.284342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.284995] remove_vma+0x139/0x170 [ 30.285457] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.286039] do_vmi_munmap+0x1f1/0x2b0 [ 30.286549] __vm_munmap+0x138/0x3a0 [ 30.287031] __x64_sys_munmap+0x59/0x80 [ 30.287535] do_syscall_64+0x3f/0x90 [ 30.288021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.288691] [ 30.288904] The buggy address belongs to the object at ffff88800ed6c910 [ 30.288904] which belongs to the cache vm_area_struct of size 168 [ 30.290436] The buggy address is located 88 bytes inside of [ 30.290436] freed 168-byte region [ffff88800ed6c910, ffff88800ed6c9b8) [ 30.291864] [ 30.292092] The buggy address belongs to the physical page: [ 30.292755] page:0000000062e27f5b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed6c [ 30.293848] memcg:ffff88801408f101 [ 30.294274] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.294919] page_type: 0xffffffff() [ 30.295373] raw: 0100000000000200 ffff8880087a0c80 ffffea000059ff40 dead000000000006 [ 30.296297] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801408f101 [ 30.297212] page dumped because: kasan: bad access detected [ 30.297892] [ 30.298105] Memory state around the buggy address: [ 30.298685] ffff88800ed6c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.299545] ffff88800ed6c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.300407] >ffff88800ed6c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.301263] ^ [ 30.302054] ffff88800ed6c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.302914] ffff88800ed6ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.303766] ================================================================== [ 30.304936] Disabling lock debugging due to kernel taint [ 32.545776] BUG: Bad rss-counter state mm:00000000fba41a54 type:MM_FILEPAGES val:33 [ 32.547028] BUG: Bad rss-counter state mm:00000000fba41a54 type:MM_ANONPAGES val:22 [ 32.931090] BUG: Bad rss-counter state mm:0000000054eaa2ac type:MM_FILEPAGES val:33 [ 32.932198] BUG: Bad rss-counter state mm:0000000054eaa2ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18602' (ECDSA) to the list of known hosts. 2023/06/20 15:29:32 fuzzer started 2023/06/20 15:29:32 dialing manager at localhost:36067 2023/06/20 15:29:32 checking machine... 2023/06/20 15:29:32 checking revisions... [ 33.633628] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:29:32 testing simple program... [ 33.689632] cgroup: Unknown subsys name 'net' [ 33.741228] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:29:32 Registers: info registers vcpu 0 RAX=0000000000000040 RBX=ffff888008d9fa20 RCX=0000000000000001 RDX=1ffff110011b3f57 RSI=ffffffff8186b835 RDI=ffff888008d9fa2c RBP=ffff888008d9fab8 RSP=ffff888008d9f938 R8 =0000000000000001 R9 =ffff888008d9f998 R10=0000000000038001 R11=0000000000020cbd R12=ffff888008d9fa20 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800d716c00 RIP=ffffffff813ad553 RFL=00000287 [--S--PC] 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=00007fe33538cbe0 CR3=000000000cc08000 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=97248a4c005e39eb00000000000ae988 XMM05=0c3abdc3007025d20000000000132740 XMM06=19e9129bd510f23500000000001315a0 XMM07=fb795ef6d657705600000000001217c0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf0f000 RCX=0000000000000000 RDX=1ffff11002852988 RSI=0000000000000001 RDI=ffff888014294c40 RBP=ffff888014293680 RSP=ffff88800e76fa10 R8 =ffff888008e0e7a4 R9 =ffffed10011c1a38 R10=ffff888008e0d1c7 R11=0000000000000000 R12=ffff888008e0d1c0 R13=0000000000000001 R14=ffff888008e0e780 R15=ffff888008e0e7a6 RIP=ffffffff8107f1fa RFL=00000046 [---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 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=00007f94ab15e618 CR3=0000000015bc0000 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=39323a3531203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303536 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000