syzkaller login: [ 35.401494] BUG: Bad rss-counter state mm:000000002fd77db9 type:MM_FILEPAGES val:33 [ 35.402043] BUG: Bad rss-counter state mm:000000002fd77db9 type:MM_ANONPAGES val:22 [ 35.561590] ================================================================== [ 35.562543] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.563500] Read of size 8 at addr ffff88800ecd23f8 by task sshd/221 [ 35.564265] [ 35.564491] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.565446] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.566437] Call Trace: [ 35.566780] [ 35.567078] dump_stack_lvl+0x91/0xf0 [ 35.567569] print_report+0xcc/0x620 [ 35.568051] ? __virt_addr_valid+0x102/0x340 [ 35.568595] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.569216] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.569838] kasan_report+0xbe/0xf0 [ 35.570318] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.570949] vma_interval_tree_remove+0xc75/0xec0 [ 35.571543] vma_prepare+0xc54/0x11a0 [ 35.572028] __split_vma+0x5af/0x950 [ 35.572501] ? __pfx___split_vma+0x10/0x10 [ 35.573034] ? find_held_lock+0x2c/0x110 [ 35.573551] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.574114] ? lock_is_held_type+0x9f/0x120 [ 35.574662] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.575276] ? mtree_range_walk+0x632/0x900 [ 35.575830] ? mas_walk+0x5c7/0x7c0 [ 35.576309] do_vmi_munmap+0x1f1/0x2b0 [ 35.576797] mmap_region+0x1f9/0x2660 [ 35.577277] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.577783] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.578506] ? __pfx_lock_acquire+0x10/0x10 [ 35.579041] ? __pfx_mmap_region+0x10/0x10 [ 35.579569] ? security_mmap_addr+0x7d/0xa0 [ 35.580104] ? get_unmapped_area+0x1f5/0x3f0 [ 35.580648] do_mmap+0x854/0xf00 [ 35.581088] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.581582] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.582157] ksys_mmap_pgoff+0x3af/0x500 [ 35.582685] do_syscall_64+0x3f/0x90 [ 35.583181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.583845] RIP: 0033:0x7f026640ed82 [ 35.584304] 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 [ 35.586421] RSP: 002b:00007ffca874e4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.587353] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f026640ed82 [ 35.588209] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0265848000 [ 35.589068] RBP: 00007f0265848000 R08: 0000000000000009 R09: 0000000000001000 [ 35.589919] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cadd844ec0 [ 35.590775] R13: 00007ffca874e4e0 R14: 00007ffca874e510 R15: 00007ffca874e870 [ 35.591623] [ 35.591923] [ 35.592140] Allocated by task 212: [ 35.592569] kasan_save_stack+0x22/0x50 [ 35.593083] kasan_set_track+0x25/0x30 [ 35.593575] __kasan_slab_alloc+0x59/0x70 [ 35.594107] kmem_cache_alloc+0x16b/0x370 [ 35.594631] vm_area_dup+0x20/0x160 [ 35.595104] __split_vma+0x170/0x950 [ 35.595575] split_vma+0xc6/0x110 [ 35.596016] mprotect_fixup+0x8d2/0xb30 [ 35.596516] do_mprotect_pkey+0x87e/0xd40 [ 35.597050] __x64_sys_mprotect+0x78/0xc0 [ 35.597569] do_syscall_64+0x3f/0x90 [ 35.598050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.598711] [ 35.598929] Freed by task 212: [ 35.599329] kasan_save_stack+0x22/0x50 [ 35.599835] kasan_set_track+0x25/0x30 [ 35.600329] kasan_save_free_info+0x2b/0x50 [ 35.600865] __kasan_slab_free+0x10a/0x190 [ 35.601392] kmem_cache_free+0x10d/0x4d0 [ 35.601903] rcu_core+0x8c8/0x2860 [ 35.602346] __do_softirq+0x1b7/0x7d4 [ 35.602841] [ 35.603052] Last potentially related work creation: [ 35.603652] kasan_save_stack+0x22/0x50 [ 35.604161] __kasan_record_aux_stack+0x8e/0xa0 [ 35.604740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.605387] remove_vma+0x139/0x170 [ 35.605842] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.606404] do_vmi_munmap+0x1f1/0x2b0 [ 35.606924] __vm_munmap+0x138/0x3a0 [ 35.607395] __x64_sys_munmap+0x59/0x80 [ 35.607896] do_syscall_64+0x3f/0x90 [ 35.608374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.609019] [ 35.609239] The buggy address belongs to the object at ffff88800ecd23a0 [ 35.609239] which belongs to the cache vm_area_struct of size 168 [ 35.610720] The buggy address is located 88 bytes inside of [ 35.610720] freed 168-byte region [ffff88800ecd23a0, ffff88800ecd2448) [ 35.612128] [ 35.612345] The buggy address belongs to the physical page: [ 35.613003] page:00000000e30580ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecd2 [ 35.614089] memcg:ffff88800da9d001 [ 35.614522] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.615213] page_type: 0xffffffff() [ 35.615663] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 35.616582] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da9d001 [ 35.617489] page dumped because: kasan: bad access detected [ 35.618150] [ 35.618366] Memory state around the buggy address: [ 35.618962] ffff88800ecd2280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.619816] ffff88800ecd2300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.620672] >ffff88800ecd2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.621511] ^ [ 35.622357] ffff88800ecd2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.623218] ffff88800ecd2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.624063] ================================================================== [ 35.625217] Disabling lock debugging due to kernel taint [ 37.626203] BUG: Bad rss-counter state mm:00000000c128c1ed type:MM_FILEPAGES val:33 [ 37.627563] BUG: Bad rss-counter state mm:00000000c128c1ed type:MM_ANONPAGES val:22 [ 38.064314] BUG: Bad rss-counter state mm:000000006e016c15 type:MM_FILEPAGES val:33 [ 38.065202] BUG: Bad rss-counter state mm:000000006e016c15 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13593' (ECDSA) to the list of known hosts. 2023/06/21 00:13:16 fuzzer started 2023/06/21 00:13:16 dialing manager at localhost:36067 2023/06/21 00:13:16 checking machine... 2023/06/21 00:13:16 checking revisions... [ 38.714983] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:13:16 testing simple program... [ 38.757447] cgroup: Unknown subsys name 'net' [ 38.811228] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:13:16 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888016781b40 RCX=ffffffff812bd98d RDX=ffffed1002bc2ce0 RSI=0000000000000008 RDI=ffff888015e166f8 RBP=ffff888015e166f0 RSP=ffff8880164a7b68 R8 =0000000000000001 R9 =ffffed1002bc2cdf R10=ffff888015e166ff R11=0000000000000000 R12=1ffff11002c94f6e R13=ffff888015e166f8 R14=0000000000000001 R15=ffff888016781b40 RIP=ffffffff812bd98d 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 00007f7ae5f98900 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=00007f7ae5f67008 CR3=000000001a3e0000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800f54a850 RCX=ffffffff812e0126 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88800f54a850 RBP=1ffff1100d9e13a7 RSP=ffff88806cf09d28 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800f54a858 R13=ffff88800f54a860 R14=ffffffff818c72a3 R15=ffff88800d9c0b80 RIP=ffffffff8180f027 RFL=00000002 [-------] 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=00007f38a99c2a60 CR3=000000000ca74000 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=d79e735966e6bf893c4eb410c679bca8 XMM02=ec2efd57dc4c00df000000000011b590 XMM03=5eec388cbbce7afb000000000011b660 XMM04=1ffc8de43f52aff300000000000ae988 XMM05=dfcdbad4f1609c370000000000131bf0 XMM06=806171799158d9670000000000131a78 XMM07=e042d86d42eb936e0000000000122298 XMM08=5eec388cbbce7afb000000000011b660 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000