syzkaller login: [ 33.748437] BUG: Bad rss-counter state mm:00000000ff0e24c6 type:MM_FILEPAGES val:33 [ 33.749450] BUG: Bad rss-counter state mm:00000000ff0e24c6 type:MM_ANONPAGES val:22 [ 33.788256] ================================================================== [ 33.789532] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.790854] Read of size 8 at addr ffff888009645310 by task sshd/219 [ 33.792069] [ 33.792377] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.793529] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.794841] Call Trace: [ 33.795312] [ 33.795656] dump_stack_lvl+0x91/0xf0 [ 33.796255] print_report+0xcc/0x620 [ 33.796955] ? __virt_addr_valid+0x102/0x340 [ 33.797619] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.798394] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.799147] kasan_report+0xbe/0xf0 [ 33.799734] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.800499] vma_interval_tree_remove+0xc75/0xec0 [ 33.801239] vma_prepare+0xc54/0x11a0 [ 33.801826] __split_vma+0x5af/0x950 [ 33.802435] ? __pfx___split_vma+0x10/0x10 [ 33.802988] ? find_held_lock+0x2c/0x110 [ 33.803508] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.804080] ? lock_is_held_type+0x9f/0x120 [ 33.804618] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.805231] ? mtree_range_walk+0x632/0x900 [ 33.805779] ? mas_walk+0x5c7/0x7c0 [ 33.806268] do_vmi_munmap+0x1f1/0x2b0 [ 33.806764] mmap_region+0x1f9/0x2660 [ 33.807251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.807765] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.808483] ? __pfx_lock_acquire+0x10/0x10 [ 33.809017] ? __pfx_mmap_region+0x10/0x10 [ 33.809558] ? security_mmap_addr+0x7d/0xa0 [ 33.810102] ? get_unmapped_area+0x1f5/0x3f0 [ 33.810684] do_mmap+0x854/0xf00 [ 33.811125] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.811622] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.812189] ksys_mmap_pgoff+0x3af/0x500 [ 33.812706] do_syscall_64+0x3f/0x90 [ 33.813190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.813867] RIP: 0033:0x7f1076f08d82 [ 33.814337] 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 [ 33.816504] RSP: 002b:00007ffe94f91258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.817437] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1076f08d82 [ 33.818311] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1076342000 [ 33.819198] RBP: 00007f1076342000 R08: 0000000000000009 R09: 0000000000001000 [ 33.820067] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8c7401d90 [ 33.820931] R13: 00007ffe94f91270 R14: 00007ffe94f912a0 R15: 00007ffe94f91600 [ 33.821800] [ 33.822100] [ 33.822323] Allocated by task 212: [ 33.822787] kasan_save_stack+0x22/0x50 [ 33.823292] kasan_set_track+0x25/0x30 [ 33.823808] __kasan_slab_alloc+0x59/0x70 [ 33.824342] kmem_cache_alloc+0x16b/0x370 [ 33.824872] vm_area_dup+0x20/0x160 [ 33.825331] __split_vma+0x170/0x950 [ 33.825802] split_vma+0xc6/0x110 [ 33.826244] mprotect_fixup+0x8d2/0xb30 [ 33.826757] do_mprotect_pkey+0x87e/0xd40 [ 33.827292] __x64_sys_mprotect+0x78/0xc0 [ 33.827821] do_syscall_64+0x3f/0x90 [ 33.828306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.828952] [ 33.829166] Freed by task 212: [ 33.829569] kasan_save_stack+0x22/0x50 [ 33.830077] kasan_set_track+0x25/0x30 [ 33.830601] kasan_save_free_info+0x2b/0x50 [ 33.831150] __kasan_slab_free+0x10a/0x190 [ 33.831695] kmem_cache_free+0x10d/0x4d0 [ 33.832209] rcu_core+0x8c8/0x2860 [ 33.832729] __do_softirq+0x1b7/0x7d4 [ 33.833212] [ 33.833430] Last potentially related work creation: [ 33.834035] kasan_save_stack+0x22/0x50 [ 33.834553] __kasan_record_aux_stack+0x8e/0xa0 [ 33.835138] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.835803] remove_vma+0x139/0x170 [ 33.836269] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.836845] do_vmi_munmap+0x1f1/0x2b0 [ 33.837336] __vm_munmap+0x138/0x3a0 [ 33.837816] __x64_sys_munmap+0x59/0x80 [ 33.838330] do_syscall_64+0x3f/0x90 [ 33.838826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.839479] [ 33.839701] The buggy address belongs to the object at ffff8880096452b8 [ 33.839701] which belongs to the cache vm_area_struct of size 168 [ 33.841232] The buggy address is located 88 bytes inside of [ 33.841232] freed 168-byte region [ffff8880096452b8, ffff888009645360) [ 33.842700] [ 33.842916] The buggy address belongs to the physical page: [ 33.843576] page:000000006b290f1a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9645 [ 33.844691] memcg:ffff88800eec1e01 [ 33.845125] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.845849] page_type: 0xffffffff() [ 33.846311] raw: 0100000000000200 ffff88800879fc80 ffffea00003ad280 dead000000000003 [ 33.847257] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eec1e01 [ 33.848188] page dumped because: kasan: bad access detected [ 33.848859] [ 33.849079] Memory state around the buggy address: [ 33.849672] ffff888009645200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.850566] ffff888009645280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.851437] >ffff888009645300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.852301] ^ [ 33.852770] ffff888009645380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.853642] ffff888009645400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.854525] ================================================================== [ 33.855567] Disabling lock debugging due to kernel taint [ 35.858325] BUG: Bad rss-counter state mm:000000001b017f55 type:MM_FILEPAGES val:33 [ 35.859391] BUG: Bad rss-counter state mm:000000001b017f55 type:MM_ANONPAGES val:22 [ 36.314718] BUG: Bad rss-counter state mm:000000004c949d14 type:MM_FILEPAGES val:33 [ 36.315715] BUG: Bad rss-counter state mm:000000004c949d14 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29721' (ECDSA) to the list of known hosts. 2023/06/19 15:08:46 fuzzer started 2023/06/19 15:08:47 dialing manager at localhost:44161 2023/06/19 15:08:47 checking machine... 2023/06/19 15:08:47 checking revisions... [ 37.064834] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:08:47 testing simple program... [ 37.111068] cgroup: Unknown subsys name 'net' [ 37.161774] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:08:44 Registers: info registers vcpu 0 RAX=ffff888008d80001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d7f901 RSI=ffff888008d7f948 RDI=ffff888008d7f948 RBP=ffff888008d7f9d0 RSP=ffff888008d7f8b0 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000006097 R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7f948 R15=ffff888008d7f978 RIP=ffffffff8112fbf0 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 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=00007f69de25c650 CR3=00000000180de000 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=38303a3531203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732036343a3830 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343139 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888015c99cc0 RCX=0000000000000000 RDX=ffff88800d638000 RSI=ffffffff811f7eff RDI=0000000000000005 RBP=ffff88800d667a88 RSP=ffff88800d6678e0 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000001b R11=63206e6f69737365 R12=ffff88800d667e60 R13=0000000000000000 R14=ffff888015c99cc8 R15=1ffff11001accf1d RIP=ffffffff814c07eb RFL=00000293 [--S-A-C] 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 00007f0bacce8900 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=00007f0bac0f4e30 CR3=000000000d73a000 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=f8fddf4d4cce9d9db947e14d64562cbf XMM02=000000000011d0e8eff9b2d0a8fce9cb XMM03=000000000011d1b82c67c8bc2e329bc3 XMM04=7f4d8979fe175da700000000000ae988 XMM05=89daed85e68d7ca600000000001352c0 XMM06=806171799158d96700000000001340b0 XMM07=fb795ef6d65770560000000000124630 XMM08=2c67c8bc2e329bc3000000000011d158 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000