syzkaller login: [ 28.673126] BUG: Bad rss-counter state mm:000000003b1f9f0a type:MM_FILEPAGES val:33 [ 28.674602] BUG: Bad rss-counter state mm:000000003b1f9f0a type:MM_ANONPAGES val:22 [ 28.841344] ================================================================== [ 28.842258] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.843229] Read of size 8 at addr ffff888015d6b5c8 by task sshd/219 [ 28.844007] [ 28.844229] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.845216] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.846204] Call Trace: [ 28.846530] [ 28.846824] dump_stack_lvl+0x91/0xf0 [ 28.847333] print_report+0xcc/0x620 [ 28.847825] ? __virt_addr_valid+0x102/0x340 [ 28.848388] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.849014] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.849640] kasan_report+0xbe/0xf0 [ 28.850124] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.850751] vma_interval_tree_remove+0xc75/0xec0 [ 28.851400] vma_prepare+0xc54/0x11a0 [ 28.851885] __split_vma+0x5af/0x950 [ 28.852360] ? __pfx___split_vma+0x10/0x10 [ 28.852891] ? find_held_lock+0x2c/0x110 [ 28.853416] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.853985] ? lock_is_held_type+0x9f/0x120 [ 28.854534] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.855159] ? mtree_range_walk+0x632/0x900 [ 28.855714] ? mas_walk+0x5c7/0x7c0 [ 28.856189] do_vmi_munmap+0x1f1/0x2b0 [ 28.856699] mmap_region+0x1f9/0x2660 [ 28.857181] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.857699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.858421] ? __pfx_lock_acquire+0x10/0x10 [ 28.858953] ? __pfx_mmap_region+0x10/0x10 [ 28.859528] ? security_mmap_addr+0x7d/0xa0 [ 28.860064] ? get_unmapped_area+0x1f5/0x3f0 [ 28.860620] do_mmap+0x854/0xf00 [ 28.861059] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.861561] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.862133] ksys_mmap_pgoff+0x3af/0x500 [ 28.862658] do_syscall_64+0x3f/0x90 [ 28.863146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.863795] RIP: 0033:0x7f8aad786d82 [ 28.864256] 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 [ 28.866408] RSP: 002b:00007ffcc1804048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.867321] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8aad786d82 [ 28.868179] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8aacbc0000 [ 28.869026] RBP: 00007f8aacbc0000 R08: 0000000000000009 R09: 0000000000001000 [ 28.869878] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594af941f60 [ 28.870731] R13: 00007ffcc1804060 R14: 00007ffcc1804090 R15: 00007ffcc18043f0 [ 28.871619] [ 28.871912] [ 28.872133] Allocated by task 212: [ 28.872562] kasan_save_stack+0x22/0x50 [ 28.873068] kasan_set_track+0x25/0x30 [ 28.873573] __kasan_slab_alloc+0x59/0x70 [ 28.874095] kmem_cache_alloc+0x16b/0x370 [ 28.874615] vm_area_dup+0x20/0x160 [ 28.875082] __split_vma+0x170/0x950 [ 28.875553] split_vma+0xc6/0x110 [ 28.875993] mprotect_fixup+0x8d2/0xb30 [ 28.876508] do_mprotect_pkey+0x87e/0xd40 [ 28.877035] __x64_sys_mprotect+0x78/0xc0 [ 28.877567] do_syscall_64+0x3f/0x90 [ 28.878046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.878700] [ 28.878914] Freed by task 13: [ 28.879304] kasan_save_stack+0x22/0x50 [ 28.879807] kasan_set_track+0x25/0x30 [ 28.880303] kasan_save_free_info+0x2b/0x50 [ 28.880841] __kasan_slab_free+0x10a/0x190 [ 28.881372] kmem_cache_free+0x10d/0x4d0 [ 28.881887] rcu_core+0x8c8/0x2860 [ 28.882340] __do_softirq+0x1b7/0x7d4 [ 28.882832] [ 28.883046] Last potentially related work creation: [ 28.883651] kasan_save_stack+0x22/0x50 [ 28.884155] __kasan_record_aux_stack+0x8e/0xa0 [ 28.884731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.885373] remove_vma+0x139/0x170 [ 28.885851] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.886424] do_vmi_munmap+0x1f1/0x2b0 [ 28.886905] __vm_munmap+0x138/0x3a0 [ 28.887384] __x64_sys_munmap+0x59/0x80 [ 28.887891] do_syscall_64+0x3f/0x90 [ 28.888374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.889029] [ 28.889247] The buggy address belongs to the object at ffff888015d6b570 [ 28.889247] which belongs to the cache vm_area_struct of size 168 [ 28.890730] The buggy address is located 88 bytes inside of [ 28.890730] freed 168-byte region [ffff888015d6b570, ffff888015d6b618) [ 28.892153] [ 28.892372] The buggy address belongs to the physical page: [ 28.893037] page:00000000c511c7a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d6b [ 28.894147] memcg:ffff88800c40cb01 [ 28.894581] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.895240] page_type: 0xffffffff() [ 28.895689] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.896616] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c40cb01 [ 28.897542] page dumped because: kasan: bad access detected [ 28.898212] [ 28.898430] Memory state around the buggy address: [ 28.899016] ffff888015d6b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.899895] ffff888015d6b500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 28.900771] >ffff888015d6b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.901632] ^ [ 28.902296] ffff888015d6b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.903167] ffff888015d6b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.904029] ================================================================== [ 28.904966] Disabling lock debugging due to kernel taint [ 30.853764] BUG: Bad rss-counter state mm:00000000433bdbc8 type:MM_FILEPAGES val:33 [ 30.855397] BUG: Bad rss-counter state mm:00000000433bdbc8 type:MM_ANONPAGES val:22 [ 31.411441] BUG: Bad rss-counter state mm:00000000e5541178 type:MM_FILEPAGES val:33 [ 31.412431] BUG: Bad rss-counter state mm:00000000e5541178 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26389' (ECDSA) to the list of known hosts. 2023/06/20 23:01:12 fuzzer started 2023/06/20 23:01:12 dialing manager at localhost:36067 2023/06/20 23:01:12 checking machine... 2023/06/20 23:01:12 checking revisions... [ 32.043859] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:01:12 testing simple program... [ 32.096997] cgroup: Unknown subsys name 'net' [ 32.156524] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:01:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018d0fcb8 RCX=0000000000000001 RDX=1ffff110031a1f1c RSI=ffff888018d0fca8 RDI=ffff888018d0f8e0 RBP=ffff8880087b23c0 RSP=ffff888018d0f868 R8 =0000000000000001 R9 =ffff888018d0f918 R10=0000000000038001 R11=0000000000020c51 R12=ffff888018d0f938 R13=ffff888018d0f920 R14=ffff888018d0fca8 R15=ffff888018d0f8d8 RIP=ffffffff81131c83 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 00007f72d8c51900 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=00007f72d92090b0 CR3=000000000949a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ff58fd54280 CR3=000000000f10a000 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=0e3f4a410084dc9bf44b3b23ef2497e6 XMM02=000000000011b440ec2efd57dc4c00df XMM03=000000000012222080a1f43c3e1fa70a XMM04=c276c36751c8cab800000000000ae988 XMM05=dfcdbad4f1609c370000000000131ff0 XMM06=ea5bc538dcc56a2a0000000000130e58 XMM07=e042d86d42eb936e00000000001224a0 XMM08=80a1f43c3e1fa70a000000000011b4a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000