syzkaller login: [ 35.667948] BUG: Bad rss-counter state mm:000000009b721a3f type:MM_FILEPAGES val:33 [ 35.669519] BUG: Bad rss-counter state mm:000000009b721a3f type:MM_ANONPAGES val:22 [ 35.823134] ================================================================== [ 35.824052] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.824982] Read of size 8 at addr ffff88800caf23f8 by task sshd/220 [ 35.825767] [ 35.825986] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.827068] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.828178] Call Trace: [ 35.828539] [ 35.828989] dump_stack_lvl+0x91/0xf0 [ 35.829665] print_report+0xcc/0x620 [ 35.830308] ? __virt_addr_valid+0x102/0x340 [ 35.831039] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.831887] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.832722] kasan_report+0xbe/0xf0 [ 35.833366] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.834204] vma_interval_tree_remove+0xc75/0xec0 [ 35.835023] vma_prepare+0xc54/0x11a0 [ 35.835667] __split_vma+0x5af/0x950 [ 35.836304] ? __pfx___split_vma+0x10/0x10 [ 35.837009] ? find_held_lock+0x2c/0x110 [ 35.837718] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.838374] ? lock_is_held_type+0x9f/0x120 [ 35.839015] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.839731] ? mtree_range_walk+0x632/0x900 [ 35.840368] ? mas_walk+0x5c7/0x7c0 [ 35.840922] do_vmi_munmap+0x1f1/0x2b0 [ 35.841504] mmap_region+0x1f9/0x2660 [ 35.842063] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.842656] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.843483] ? __pfx_lock_acquire+0x10/0x10 [ 35.844107] ? __pfx_mmap_region+0x10/0x10 [ 35.844723] ? security_mmap_addr+0x7d/0xa0 [ 35.845361] ? get_unmapped_area+0x1f5/0x3f0 [ 35.845995] do_mmap+0x854/0xf00 [ 35.846503] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.847073] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.847728] ksys_mmap_pgoff+0x3af/0x500 [ 35.848317] do_syscall_64+0x3f/0x90 [ 35.848872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.849625] RIP: 0033:0x7f19f18b1d82 [ 35.850158] 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 [ 35.852633] RSP: 002b:00007ffd021f1ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.853679] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19f18b1d82 [ 35.854654] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19f0ceb000 [ 35.855620] RBP: 00007f19f0ceb000 R08: 0000000000000009 R09: 0000000000001000 [ 35.856593] R10: 0000000000000812 R11: 0000000000000206 R12: 000055edddf75d90 [ 35.857588] R13: 00007ffd021f1b00 R14: 00007ffd021f1b30 R15: 00007ffd021f1e90 [ 35.858574] [ 35.858910] [ 35.859156] Allocated by task 213: [ 35.859649] kasan_save_stack+0x22/0x50 [ 35.860227] kasan_set_track+0x25/0x30 [ 35.860798] __kasan_slab_alloc+0x59/0x70 [ 35.861407] kmem_cache_alloc+0x16b/0x370 [ 35.862004] vm_area_dup+0x20/0x160 [ 35.862532] __split_vma+0x170/0x950 [ 35.863076] split_vma+0xc6/0x110 [ 35.863586] mprotect_fixup+0x8d2/0xb30 [ 35.864163] do_mprotect_pkey+0x87e/0xd40 [ 35.864757] __x64_sys_mprotect+0x78/0xc0 [ 35.865374] do_syscall_64+0x3f/0x90 [ 35.865917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.866655] [ 35.866903] Freed by task 213: [ 35.867347] kasan_save_stack+0x22/0x50 [ 35.867958] kasan_set_track+0x25/0x30 [ 35.868548] kasan_save_free_info+0x2b/0x50 [ 35.869172] __kasan_slab_free+0x10a/0x190 [ 35.869782] kmem_cache_free+0x10d/0x4d0 [ 35.870368] rcu_core+0x8c8/0x2860 [ 35.870878] __do_softirq+0x1b7/0x7d4 [ 35.871431] [ 35.871676] Last potentially related work creation: [ 35.872347] kasan_save_stack+0x22/0x50 [ 35.872924] __kasan_record_aux_stack+0x8e/0xa0 [ 35.873586] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.874316] remove_vma+0x139/0x170 [ 35.874832] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.875472] do_vmi_munmap+0x1f1/0x2b0 [ 35.876022] __vm_munmap+0x138/0x3a0 [ 35.876549] __x64_sys_munmap+0x59/0x80 [ 35.877111] do_syscall_64+0x3f/0x90 [ 35.877668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.878401] [ 35.878648] The buggy address belongs to the object at ffff88800caf23a0 [ 35.878648] which belongs to the cache vm_area_struct of size 168 [ 35.880300] The buggy address is located 88 bytes inside of [ 35.880300] freed 168-byte region [ffff88800caf23a0, ffff88800caf2448) [ 35.881889] [ 35.882133] The buggy address belongs to the physical page: [ 35.882886] page:000000003eb9ed61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcaf2 [ 35.884093] memcg:ffff8880144f4101 [ 35.884572] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.885307] page_type: 0xffffffff() [ 35.885820] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.886865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144f4101 [ 35.887880] page dumped because: kasan: bad access detected [ 35.888603] [ 35.888847] Memory state around the buggy address: [ 35.889504] ffff88800caf2280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.890477] ffff88800caf2300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.891432] >ffff88800caf2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.892392] ^ [ 35.893336] ffff88800caf2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.894296] ffff88800caf2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.895255] ================================================================== [ 35.896454] Disabling lock debugging due to kernel taint [ 38.371494] BUG: Bad rss-counter state mm:0000000065b3e4cc type:MM_FILEPAGES val:33 [ 38.372249] BUG: Bad rss-counter state mm:0000000065b3e4cc type:MM_ANONPAGES val:22 [ 38.842841] BUG: Bad rss-counter state mm:00000000a03fc53f type:MM_FILEPAGES val:33 [ 38.843843] BUG: Bad rss-counter state mm:00000000a03fc53f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48747' (ECDSA) to the list of known hosts. 2023/06/20 02:47:42 fuzzer started 2023/06/20 02:47:42 dialing manager at localhost:44161 2023/06/20 02:47:42 checking machine... 2023/06/20 02:47:42 checking revisions... [ 39.582649] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:47:43 testing simple program... [ 39.626260] cgroup: Unknown subsys name 'net' [ 39.682506] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:47:37 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09d01 RSI=ffff88806ce09dd8 RDI=ffff88806ce09a80 RBP=ffff88806ce09dd8 RSP=ffff88806ce099d8 R8 =ffffffff86137cb0 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020ed0 R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09de0 R15=ffff88806ce09a70 RIP=ffffffff811304ce RFL=00000292 [--S-A--] 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 00007f5b39de3900 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=00007f134a7f1650 CR3=000000000c57c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=498304cb07bf92cf00000000000ae988 XMM05=5b6b75d59c0510e90000000000135510 XMM06=68954ce75a0606da00000000001342b0 XMM07=fb795ef6d657705600000000001247c0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffff3fdffe8 CR3=0000000005482000 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=00007f86d37295100000558bd3880790 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