syzkaller login: [ 30.328448] BUG: Bad rss-counter state mm:0000000081c2bcb0 type:MM_FILEPAGES val:33 [ 30.329436] BUG: Bad rss-counter state mm:0000000081c2bcb0 type:MM_ANONPAGES val:22 [ 30.507504] ================================================================== [ 30.508481] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.509485] Read of size 8 at addr ffff888016a0c5c8 by task sshd/219 [ 30.510420] [ 30.510652] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.511579] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.512658] Call Trace: [ 30.512998] [ 30.513302] dump_stack_lvl+0x91/0xf0 [ 30.513826] print_report+0xcc/0x620 [ 30.514342] ? __virt_addr_valid+0x102/0x340 [ 30.514938] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.515609] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.516331] kasan_report+0xbe/0xf0 [ 30.516861] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.517569] vma_interval_tree_remove+0xc75/0xec0 [ 30.518240] vma_prepare+0xc54/0x11a0 [ 30.518775] __split_vma+0x5af/0x950 [ 30.519302] ? __pfx___split_vma+0x10/0x10 [ 30.519906] ? find_held_lock+0x2c/0x110 [ 30.520486] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.521109] ? lock_is_held_type+0x9f/0x120 [ 30.521701] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.522375] ? mtree_range_walk+0x632/0x900 [ 30.522987] ? mas_walk+0x5c7/0x7c0 [ 30.523515] do_vmi_munmap+0x1f1/0x2b0 [ 30.524077] mmap_region+0x1f9/0x2660 [ 30.524618] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.525195] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.526007] ? __pfx_lock_acquire+0x10/0x10 [ 30.526600] ? __pfx_mmap_region+0x10/0x10 [ 30.527187] ? security_mmap_addr+0x7d/0xa0 [ 30.527805] ? get_unmapped_area+0x1f5/0x3f0 [ 30.528423] do_mmap+0x854/0xf00 [ 30.528918] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.529476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.530112] ksys_mmap_pgoff+0x3af/0x500 [ 30.530667] do_syscall_64+0x3f/0x90 [ 30.531207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.531950] RIP: 0033:0x7fdc48995d82 [ 30.532460] 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 [ 30.534850] RSP: 002b:00007ffe827ab4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.535874] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc48995d82 [ 30.536828] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc47dcf000 [ 30.537770] RBP: 00007fdc47dcf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.538715] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fa4bc68b20 [ 30.539676] R13: 00007ffe827ab510 R14: 00007ffe827ab540 R15: 00007ffe827ab8a0 [ 30.540639] [ 30.540961] [ 30.541199] Allocated by task 212: [ 30.541684] kasan_save_stack+0x22/0x50 [ 30.542261] kasan_set_track+0x25/0x30 [ 30.542820] __kasan_slab_alloc+0x59/0x70 [ 30.543404] kmem_cache_alloc+0x16b/0x370 [ 30.543988] vm_area_dup+0x20/0x160 [ 30.544497] __split_vma+0x170/0x950 [ 30.545019] split_vma+0xc6/0x110 [ 30.545505] mprotect_fixup+0x8d2/0xb30 [ 30.546076] do_mprotect_pkey+0x87e/0xd40 [ 30.546658] __x64_sys_mprotect+0x78/0xc0 [ 30.547244] do_syscall_64+0x3f/0x90 [ 30.547787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.548509] [ 30.548749] Freed by task 212: [ 30.549184] kasan_save_stack+0x22/0x50 [ 30.549745] kasan_set_track+0x25/0x30 [ 30.550307] kasan_save_free_info+0x2b/0x50 [ 30.550913] __kasan_slab_free+0x10a/0x190 [ 30.551509] kmem_cache_free+0x10d/0x4d0 [ 30.552088] rcu_core+0x8c8/0x2860 [ 30.552596] __do_softirq+0x1b7/0x7d4 [ 30.553143] [ 30.553382] Last potentially related work creation: [ 30.554024] kasan_save_stack+0x22/0x50 [ 30.554590] __kasan_record_aux_stack+0x8e/0xa0 [ 30.555226] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.555957] remove_vma+0x139/0x170 [ 30.556461] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.557087] do_vmi_munmap+0x1f1/0x2b0 [ 30.557628] __vm_munmap+0x138/0x3a0 [ 30.558154] __x64_sys_munmap+0x59/0x80 [ 30.558708] do_syscall_64+0x3f/0x90 [ 30.559238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.559958] [ 30.560198] The buggy address belongs to the object at ffff888016a0c570 [ 30.560198] which belongs to the cache vm_area_struct of size 168 [ 30.561853] The buggy address is located 88 bytes inside of [ 30.561853] freed 168-byte region [ffff888016a0c570, ffff888016a0c618) [ 30.563410] [ 30.563655] The buggy address belongs to the physical page: [ 30.564391] page:0000000003f0f57a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a0c [ 30.565612] memcg:ffff8880182c3d01 [ 30.566079] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.566802] page_type: 0xffffffff() [ 30.567300] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.568339] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182c3d01 [ 30.569341] page dumped because: kasan: bad access detected [ 30.570074] [ 30.570311] Memory state around the buggy address: [ 30.570954] ffff888016a0c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.571990] ffff888016a0c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.572954] >ffff888016a0c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.573929] ^ [ 30.574672] ffff888016a0c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.575651] ffff888016a0c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.576608] ================================================================== [ 30.577776] Disabling lock debugging due to kernel taint [ 32.654036] BUG: Bad rss-counter state mm:000000002a9232f4 type:MM_FILEPAGES val:33 [ 32.655230] BUG: Bad rss-counter state mm:000000002a9232f4 type:MM_ANONPAGES val:22 [ 33.104337] BUG: Bad rss-counter state mm:000000000c8e975f type:MM_FILEPAGES val:33 [ 33.105549] BUG: Bad rss-counter state mm:000000000c8e975f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50531' (ECDSA) to the list of known hosts. 2023/06/21 06:38:39 fuzzer started 2023/06/21 06:38:39 dialing manager at localhost:36067 2023/06/21 06:38:39 checking machine... 2023/06/21 06:38:39 checking revisions... [ 33.701016] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:38:39 testing simple program... [ 33.751700] cgroup: Unknown subsys name 'net' [ 33.824018] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:38:39 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=0000000000000001 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=00007fffedca1df8 CR3=0000000005482000 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=00007f4a83da1510000055d6a141a790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000092cc0 RSI=ffff88800e45b980 RDI=ffff88800844f780 RBP=ffff88800844f780 RSP=ffff888014797570 R8 =ffff88800e45b980 R9 =0000000000000000 R10=ffffed1001c8b730 R11=ffff88800ca29980 R12=ffff88800e45b980 R13=0000000000092cc0 R14=0000000000000000 R15=0000000000092cc0 RIP=ffffffff8180f560 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 00007f504104e900 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=00007f34bca27650 CR3=000000000caa0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3276e98106a58d0a00000000000ae988 XMM05=6c1dceb24363db5100000000001329b8 XMM06=dfcdbad4f1609c370000000000131850 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000