syzkaller login: [ 30.523230] BUG: Bad rss-counter state mm:000000002cc0c46a type:MM_FILEPAGES val:33 [ 30.524304] BUG: Bad rss-counter state mm:000000002cc0c46a type:MM_ANONPAGES val:22 [ 30.699129] ================================================================== [ 30.700096] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.701104] Read of size 8 at addr ffff88801997db38 by task sshd/219 [ 30.702028] [ 30.702270] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.703207] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.704242] Call Trace: [ 30.704607] [ 30.704915] dump_stack_lvl+0x91/0xf0 [ 30.705436] print_report+0xcc/0x620 [ 30.705955] ? __virt_addr_valid+0x102/0x340 [ 30.706544] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.707204] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.707859] kasan_report+0xbe/0xf0 [ 30.708361] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.709041] vma_interval_tree_remove+0xc75/0xec0 [ 30.709685] vma_prepare+0xc54/0x11a0 [ 30.710195] __split_vma+0x5af/0x950 [ 30.710693] ? __pfx___split_vma+0x10/0x10 [ 30.711274] ? find_held_lock+0x2c/0x110 [ 30.711838] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.712459] ? lock_is_held_type+0x9f/0x120 [ 30.713060] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.713728] ? mtree_range_walk+0x632/0x900 [ 30.714337] ? mas_walk+0x5c7/0x7c0 [ 30.714854] do_vmi_munmap+0x1f1/0x2b0 [ 30.715393] mmap_region+0x1f9/0x2660 [ 30.715920] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.716479] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.717277] ? __pfx_lock_acquire+0x10/0x10 [ 30.717864] ? __pfx_mmap_region+0x10/0x10 [ 30.718443] ? security_mmap_addr+0x7d/0xa0 [ 30.719028] ? get_unmapped_area+0x1f5/0x3f0 [ 30.719639] do_mmap+0x854/0xf00 [ 30.720116] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.720676] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.721292] ksys_mmap_pgoff+0x3af/0x500 [ 30.721852] do_syscall_64+0x3f/0x90 [ 30.722380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.723095] RIP: 0033:0x7f974e485d82 [ 30.723596] 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 [ 30.725946] RSP: 002b:00007ffe26611758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.726944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f974e485d82 [ 30.727881] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f974d8bf000 [ 30.728823] RBP: 00007f974d8bf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.729752] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d01081bd90 [ 30.730671] R13: 00007ffe26611770 R14: 00007ffe266117a0 R15: 00007ffe26611b00 [ 30.731611] [ 30.731927] [ 30.732159] Allocated by task 212: [ 30.732636] kasan_save_stack+0x22/0x50 [ 30.733189] kasan_set_track+0x25/0x30 [ 30.733729] __kasan_slab_alloc+0x59/0x70 [ 30.734301] kmem_cache_alloc+0x16b/0x370 [ 30.734865] vm_area_dup+0x20/0x160 [ 30.735362] __split_vma+0x170/0x950 [ 30.735873] split_vma+0xc6/0x110 [ 30.736351] mprotect_fixup+0x8d2/0xb30 [ 30.736907] do_mprotect_pkey+0x87e/0xd40 [ 30.737477] __x64_sys_mprotect+0x78/0xc0 [ 30.738049] do_syscall_64+0x3f/0x90 [ 30.738572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739276] [ 30.739512] Freed by task 212: [ 30.739948] kasan_save_stack+0x22/0x50 [ 30.740500] kasan_set_track+0x25/0x30 [ 30.741058] kasan_save_free_info+0x2b/0x50 [ 30.741640] __kasan_slab_free+0x10a/0x190 [ 30.742216] kmem_cache_free+0x10d/0x4d0 [ 30.742772] rcu_core+0x8c8/0x2860 [ 30.743262] __do_softirq+0x1b7/0x7d4 [ 30.743782] [ 30.744016] Last potentially related work creation: [ 30.744676] kasan_save_stack+0x22/0x50 [ 30.745228] __kasan_record_aux_stack+0x8e/0xa0 [ 30.745856] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.746559] remove_vma+0x139/0x170 [ 30.747050] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.747653] do_vmi_munmap+0x1f1/0x2b0 [ 30.748184] __vm_munmap+0x138/0x3a0 [ 30.748718] __x64_sys_munmap+0x59/0x80 [ 30.749262] do_syscall_64+0x3f/0x90 [ 30.749785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.750495] [ 30.750728] The buggy address belongs to the object at ffff88801997dae0 [ 30.750728] which belongs to the cache vm_area_struct of size 168 [ 30.752348] The buggy address is located 88 bytes inside of [ 30.752348] freed 168-byte region [ffff88801997dae0, ffff88801997db88) [ 30.753903] [ 30.754138] The buggy address belongs to the physical page: [ 30.754871] page:000000004bc596c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1997d [ 30.756059] memcg:ffff888019718b01 [ 30.756524] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.757255] page_type: 0xffffffff() [ 30.757749] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.758773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019718b01 [ 30.759776] page dumped because: kasan: bad access detected [ 30.760510] [ 30.760758] Memory state around the buggy address: [ 30.761393] ffff88801997da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.762338] ffff88801997da80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.763274] >ffff88801997db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.764213] ^ [ 30.764893] ffff88801997db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.765839] ffff88801997dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.766775] ================================================================== [ 30.767904] Disabling lock debugging due to kernel taint [ 32.811877] BUG: Bad rss-counter state mm:000000009fc891bb type:MM_FILEPAGES val:33 [ 32.812859] BUG: Bad rss-counter state mm:000000009fc891bb type:MM_ANONPAGES val:22 [ 33.275836] BUG: Bad rss-counter state mm:00000000ff42d5de type:MM_FILEPAGES val:33 [ 33.277010] BUG: Bad rss-counter state mm:00000000ff42d5de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24397' (ECDSA) to the list of known hosts. 2023/06/21 07:54:10 fuzzer started 2023/06/21 07:54:10 dialing manager at localhost:36067 2023/06/21 07:54:10 checking machine... 2023/06/21 07:54:10 checking revisions... [ 34.031253] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:54:10 testing simple program... [ 34.085986] cgroup: Unknown subsys name 'net' [ 34.127036] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:54:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8617f7d6 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888017e2f510 RSP=ffff888017e2f448 R8 =ffffffff8617f7da R9 =ffff888017e2f4f8 R10=0000000000038001 R11=000000000002c9cc R12=ffff888017e2f518 R13=ffff888017e2f500 R14=ffff888017e2f4f9 R15=ffff888017e2f4b8 RIP=ffffffff81130afe 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f967213e700 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=00007f5a150a8270 CR3=0000000017f1a000 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=2039303a34353a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a34353a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffff8880189675e8 RDX=1ffff1100312ceb5 RSI=1ffff1100312ceab RDI=ffff888018967548 RBP=ffff8880189675a0 RSP=ffff888018967488 R8 =0000000000000000 R9 =0000000000000000 R10=ffff888018967548 R11=00000000000b6a61 R12=ffff8880189675a8 R13=ffff888018967590 R14=0000000000000000 R15=ffff888018967548 RIP=ffffffff811306cb 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 00007f3472559900 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=00007f3472b10618 CR3=000000000f89a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000