syzkaller login: [ 30.889751] BUG: Bad rss-counter state mm:000000008f5a6b5b type:MM_FILEPAGES val:33 [ 30.890926] BUG: Bad rss-counter state mm:000000008f5a6b5b type:MM_ANONPAGES val:22 [ 30.929724] ================================================================== [ 30.930718] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.931754] Read of size 8 at addr ffff8880195204e0 by task sshd/228 [ 30.932519] [ 30.932742] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.933602] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.934586] Call Trace: [ 30.934909] [ 30.935204] dump_stack_lvl+0x91/0xf0 [ 30.935708] print_report+0xcc/0x620 [ 30.936188] ? __virt_addr_valid+0x102/0x340 [ 30.936740] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.937353] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.937987] kasan_report+0xbe/0xf0 [ 30.938464] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.939086] vma_interval_tree_remove+0xc75/0xec0 [ 30.939700] vma_prepare+0xc54/0x11a0 [ 30.940176] __split_vma+0x5af/0x950 [ 30.940648] ? __pfx___split_vma+0x10/0x10 [ 30.941176] ? find_held_lock+0x2c/0x110 [ 30.941703] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.942272] ? lock_is_held_type+0x9f/0x120 [ 30.942807] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.943447] ? mtree_range_walk+0x632/0x900 [ 30.944008] ? mas_walk+0x5c7/0x7c0 [ 30.944490] do_vmi_munmap+0x1f1/0x2b0 [ 30.944997] mmap_region+0x1f9/0x2660 [ 30.945492] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.946010] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.946723] ? __pfx_lock_acquire+0x10/0x10 [ 30.947262] ? __pfx_mmap_region+0x10/0x10 [ 30.947804] ? security_mmap_addr+0x7d/0xa0 [ 30.948332] ? get_unmapped_area+0x1f5/0x3f0 [ 30.948879] do_mmap+0x854/0xf00 [ 30.949326] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.949821] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.950396] ksys_mmap_pgoff+0x3af/0x500 [ 30.950904] do_syscall_64+0x3f/0x90 [ 30.951407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.952062] RIP: 0033:0x7f11a57b9d82 [ 30.952519] 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 [ 30.954649] RSP: 002b:00007ffc9895bec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.955554] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11a57b9d82 [ 30.956412] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11a4bf3000 [ 30.957265] RBP: 00007f11a4bf3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.958108] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b419c3b20 [ 30.958942] R13: 00007ffc9895bee0 R14: 00007ffc9895bf10 R15: 00007ffc9895c270 [ 30.959792] [ 30.960083] [ 30.960301] Allocated by task 221: [ 30.960727] kasan_save_stack+0x22/0x50 [ 30.961227] kasan_set_track+0x25/0x30 [ 30.961718] __kasan_slab_alloc+0x59/0x70 [ 30.962243] kmem_cache_alloc+0x16b/0x370 [ 30.962761] vm_area_dup+0x20/0x160 [ 30.963225] __split_vma+0x170/0x950 [ 30.963694] split_vma+0xc6/0x110 [ 30.964140] mprotect_fixup+0x8d2/0xb30 [ 30.964647] do_mprotect_pkey+0x87e/0xd40 [ 30.965175] __x64_sys_mprotect+0x78/0xc0 [ 30.965694] do_syscall_64+0x3f/0x90 [ 30.966160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.966794] [ 30.967010] Freed by task 221: [ 30.967403] kasan_save_stack+0x22/0x50 [ 30.967908] kasan_set_track+0x25/0x30 [ 30.968395] kasan_save_free_info+0x2b/0x50 [ 30.968924] __kasan_slab_free+0x10a/0x190 [ 30.969462] kmem_cache_free+0x10d/0x4d0 [ 30.969964] rcu_core+0x8c8/0x2860 [ 30.970403] __do_softirq+0x1b7/0x7d4 [ 30.970876] [ 30.971088] Last potentially related work creation: [ 30.971681] kasan_save_stack+0x22/0x50 [ 30.972178] __kasan_record_aux_stack+0x8e/0xa0 [ 30.972757] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.973407] remove_vma+0x139/0x170 [ 30.973853] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.974414] do_vmi_munmap+0x1f1/0x2b0 [ 30.974899] __vm_munmap+0x138/0x3a0 [ 30.975380] __x64_sys_munmap+0x59/0x80 [ 30.975878] do_syscall_64+0x3f/0x90 [ 30.976355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.976999] [ 30.977218] The buggy address belongs to the object at ffff888019520488 [ 30.977218] which belongs to the cache vm_area_struct of size 168 [ 30.978681] The buggy address is located 88 bytes inside of [ 30.978681] freed 168-byte region [ffff888019520488, ffff888019520530) [ 30.980081] [ 30.980294] The buggy address belongs to the physical page: [ 30.980938] page:00000000a4c67000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19520 [ 30.982046] memcg:ffff888009662301 [ 30.982474] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.983191] page_type: 0xffffffff() [ 30.983647] raw: 0100000000000200 ffff8880087a0c80 ffffea0000654840 dead000000000003 [ 30.984563] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009662301 [ 30.985471] page dumped because: kasan: bad access detected [ 30.986127] [ 30.986344] Memory state around the buggy address: [ 30.986920] ffff888019520380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.987777] ffff888019520400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.988650] >ffff888019520480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.989505] ^ [ 30.990253] ffff888019520500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.991121] ffff888019520580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.991982] ================================================================== [ 30.993011] Disabling lock debugging due to kernel taint [ 32.870560] BUG: Bad rss-counter state mm:000000008d591b2d type:MM_FILEPAGES val:33 [ 32.871866] BUG: Bad rss-counter state mm:000000008d591b2d type:MM_ANONPAGES val:22 [ 33.333608] BUG: Bad rss-counter state mm:0000000031ec554d type:MM_FILEPAGES val:33 [ 33.334608] BUG: Bad rss-counter state mm:0000000031ec554d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34704' (ECDSA) to the list of known hosts. 2023/06/21 01:36:25 fuzzer started 2023/06/21 01:36:25 dialing manager at localhost:36067 2023/06/21 01:36:25 checking machine... 2023/06/21 01:36:25 checking revisions... [ 34.120129] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:36:25 testing simple program... [ 34.168658] cgroup: Unknown subsys name 'net' [ 34.206920] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:36:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801469fe01 RSI=ffff88801469fe58 RDI=ffff88801469fe58 RBP=ffff88801469fa98 RSP=ffff88801469f9c8 R8 =0000000000000001 R9 =ffff88801469fa80 R10=0000000000038001 R11=000000000008a6b1 R12=ffff88801469faa0 R13=ffff88801469fa88 R14=ffff88801469fe58 R15=ffff88801469fa40 RIP=ffffffff8112fbf3 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 00007f6c7d02c900 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=00007f6c7d5e1650 CR3=000000000d9b0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002796bb5 RBX=ffff888013cb5d78 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888013cb5da8 RBP=ffff888013b191e0 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6d53 R12=dffffc0000000000 R13=ffff888018ee0eb0 R14=ffffffff813782f8 R15=ffff88800db08280 RIP=ffffffff818464e2 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3bcf184900 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=00007f3bce6a2000 CR3=000000000972a000 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=00000000000aead06b1e99b806172e3b XMM01=00000000000f7d1080f09f19808d26a3 XMM02=00000000000f80502e86c1e8fc577532 XMM03=00000000000f9ea8ac585006bc0bee6f XMM04=99a720bac80e3a7200000000000ae988 XMM05=1a58cb52dc18f6d70000000000131a90 XMM06=aa96229bb563079e00000000001308f8 XMM07=e042d86d42eb936e0000000000121f30 XMM08=1ce39a1e99fa13e1000000000011acc0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000