syzkaller login: [ 31.375453] BUG: Bad rss-counter state mm:00000000df34a850 type:MM_FILEPAGES val:33 [ 31.376454] BUG: Bad rss-counter state mm:00000000df34a850 type:MM_ANONPAGES val:22 [ 31.547654] ================================================================== [ 31.548664] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.549910] Read of size 8 at addr ffff88801888e6b0 by task sshd/221 [ 31.550790] [ 31.551029] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.551990] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.553074] Call Trace: [ 31.553434] [ 31.553746] dump_stack_lvl+0x91/0xf0 [ 31.554292] print_report+0xcc/0x620 [ 31.554836] ? __virt_addr_valid+0x102/0x340 [ 31.555453] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.556138] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.556816] kasan_report+0xbe/0xf0 [ 31.557341] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.558026] vma_interval_tree_remove+0xc75/0xec0 [ 31.558701] vma_prepare+0xc54/0x11a0 [ 31.559243] __split_vma+0x5af/0x950 [ 31.559770] ? __pfx___split_vma+0x10/0x10 [ 31.560369] ? find_held_lock+0x2c/0x110 [ 31.560953] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.561584] ? lock_is_held_type+0x9f/0x120 [ 31.562188] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.562880] ? mtree_range_walk+0x632/0x900 [ 31.563505] ? mas_walk+0x5c7/0x7c0 [ 31.564029] do_vmi_munmap+0x1f1/0x2b0 [ 31.564575] mmap_region+0x1f9/0x2660 [ 31.565113] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.565685] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.566478] ? __pfx_lock_acquire+0x10/0x10 [ 31.567081] ? __pfx_mmap_region+0x10/0x10 [ 31.567677] ? security_mmap_addr+0x7d/0xa0 [ 31.568272] ? get_unmapped_area+0x1f5/0x3f0 [ 31.568885] do_mmap+0x854/0xf00 [ 31.569373] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.569930] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.570574] ksys_mmap_pgoff+0x3af/0x500 [ 31.571139] do_syscall_64+0x3f/0x90 [ 31.571678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.572401] RIP: 0033:0x7fc0f035dd82 [ 31.572915] 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 [ 31.575309] RSP: 002b:00007ffddba72c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.576327] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc0f035dd82 [ 31.577272] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0ef797000 [ 31.578216] RBP: 00007fc0ef797000 R08: 0000000000000009 R09: 0000000000001000 [ 31.579178] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562bdb487ec0 [ 31.580158] R13: 00007ffddba72c40 R14: 00007ffddba72c70 R15: 00007ffddba72fd0 [ 31.581116] [ 31.581441] [ 31.581677] Allocated by task 214: [ 31.582164] kasan_save_stack+0x22/0x50 [ 31.582755] kasan_set_track+0x25/0x30 [ 31.583313] __kasan_slab_alloc+0x59/0x70 [ 31.583945] kmem_cache_alloc+0x16b/0x370 [ 31.584535] vm_area_dup+0x20/0x160 [ 31.585082] __split_vma+0x170/0x950 [ 31.585642] split_vma+0xc6/0x110 [ 31.586197] mprotect_fixup+0x8d2/0xb30 [ 31.586830] do_mprotect_pkey+0x87e/0xd40 [ 31.587447] __x64_sys_mprotect+0x78/0xc0 [ 31.588055] do_syscall_64+0x3f/0x90 [ 31.588627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.589400] [ 31.589665] Freed by task 13: [ 31.590139] kasan_save_stack+0x22/0x50 [ 31.590742] kasan_set_track+0x25/0x30 [ 31.591383] kasan_save_free_info+0x2b/0x50 [ 31.592025] __kasan_slab_free+0x10a/0x190 [ 31.592714] kmem_cache_free+0x10d/0x4d0 [ 31.593348] rcu_core+0x8c8/0x2860 [ 31.593888] __do_softirq+0x1b7/0x7d4 [ 31.594482] [ 31.594767] Last potentially related work creation: [ 31.595525] kasan_save_stack+0x22/0x50 [ 31.596136] __kasan_record_aux_stack+0x8e/0xa0 [ 31.596816] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.597562] remove_vma+0x139/0x170 [ 31.598080] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.598729] do_vmi_munmap+0x1f1/0x2b0 [ 31.599282] __vm_munmap+0x138/0x3a0 [ 31.599801] __x64_sys_munmap+0x59/0x80 [ 31.600354] do_syscall_64+0x3f/0x90 [ 31.600895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.601647] [ 31.601889] The buggy address belongs to the object at ffff88801888e658 [ 31.601889] which belongs to the cache vm_area_struct of size 168 [ 31.603578] The buggy address is located 88 bytes inside of [ 31.603578] freed 168-byte region [ffff88801888e658, ffff88801888e700) [ 31.605138] [ 31.605378] The buggy address belongs to the physical page: [ 31.606111] page:000000002fab731a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1888e [ 31.607350] memcg:ffff88800ea31a01 [ 31.607833] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.608557] page_type: 0xffffffff() [ 31.609060] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.610091] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea31a01 [ 31.611141] page dumped because: kasan: bad access detected [ 31.611851] [ 31.612080] Memory state around the buggy address: [ 31.612699] ffff88801888e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.613621] ffff88801888e600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.614563] >ffff88801888e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.615476] ^ [ 31.616145] ffff88801888e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.617101] ffff88801888e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.618049] ================================================================== [ 31.619176] Disabling lock debugging due to kernel taint [ 34.571793] BUG: Bad rss-counter state mm:000000006301fdba type:MM_FILEPAGES val:33 [ 34.573079] BUG: Bad rss-counter state mm:000000006301fdba type:MM_ANONPAGES val:22 [ 34.967232] BUG: Bad rss-counter state mm:00000000cb6d2418 type:MM_FILEPAGES val:33 [ 34.968312] BUG: Bad rss-counter state mm:00000000cb6d2418 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38385' (ECDSA) to the list of known hosts. 2023/06/20 11:04:51 fuzzer started 2023/06/20 11:04:52 dialing manager at localhost:36067 2023/06/20 11:04:52 checking machine... 2023/06/20 11:04:52 checking revisions... [ 35.709205] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:04:52 testing simple program... [ 35.764905] cgroup: Unknown subsys name 'net' [ 35.831988] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:04:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f77810870d0 CR3=0000000015f20000 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=2031353a34303a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a34303a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888015c33000 RCX=0000000000000024 RDX=ffff88800fd6fd90 RSI=0000000000000000 RDI=ffff88800e6aa000 RBP=ffff88800e6aa000 RSP=ffff88800fd6fb58 R8 =0000000000000006 R9 =000000000000231c R10=0000000000000024 R11=0000000000000000 R12=ffff88800fd6fd80 R13=ffff888016124500 R14=000000000000231c R15=0000000000000024 RIP=ffffffff83696776 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 00007fd3e246e900 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=00007ffd80941000 CR3=000000000ee92000 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=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