syzkaller login: [ 31.681966] BUG: Bad rss-counter state mm:00000000dd34f484 type:MM_FILEPAGES val:33 [ 31.683004] BUG: Bad rss-counter state mm:00000000dd34f484 type:MM_ANONPAGES val:22 [ 31.860690] ================================================================== [ 31.861690] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.862691] Read of size 8 at addr ffff88800db5e4e0 by task sshd/219 [ 31.863603] [ 31.863845] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.864775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.865866] Call Trace: [ 31.866215] [ 31.866517] dump_stack_lvl+0x91/0xf0 [ 31.867047] print_report+0xcc/0x620 [ 31.867564] ? __virt_addr_valid+0x102/0x340 [ 31.868153] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.868811] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.869486] kasan_report+0xbe/0xf0 [ 31.870001] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.870676] vma_interval_tree_remove+0xc75/0xec0 [ 31.871333] vma_prepare+0xc54/0x11a0 [ 31.871855] __split_vma+0x5af/0x950 [ 31.872363] ? __pfx___split_vma+0x10/0x10 [ 31.872933] ? find_held_lock+0x2c/0x110 [ 31.873503] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.874109] ? lock_is_held_type+0x9f/0x120 [ 31.874689] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.875337] ? mtree_range_walk+0x632/0x900 [ 31.875938] ? mas_walk+0x5c7/0x7c0 [ 31.876454] do_vmi_munmap+0x1f1/0x2b0 [ 31.876988] mmap_region+0x1f9/0x2660 [ 31.877533] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.878081] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.878848] ? __pfx_lock_acquire+0x10/0x10 [ 31.879417] ? __pfx_mmap_region+0x10/0x10 [ 31.879981] ? security_mmap_addr+0x7d/0xa0 [ 31.880552] ? get_unmapped_area+0x1f5/0x3f0 [ 31.881144] do_mmap+0x854/0xf00 [ 31.881610] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.882143] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.882749] ksys_mmap_pgoff+0x3af/0x500 [ 31.883308] do_syscall_64+0x3f/0x90 [ 31.883818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.884523] RIP: 0033:0x7f50d4f95d82 [ 31.885013] 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 [ 31.887279] RSP: 002b:00007ffcc928a0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.888244] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f50d4f95d82 [ 31.889190] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f50d43cf000 [ 31.890115] RBP: 00007f50d43cf000 R08: 0000000000000009 R09: 0000000000001000 [ 31.891038] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559085e8cd90 [ 31.891958] R13: 00007ffcc928a0e0 R14: 00007ffcc928a110 R15: 00007ffcc928a470 [ 31.892872] [ 31.893188] [ 31.893422] Allocated by task 212: [ 31.893893] kasan_save_stack+0x22/0x50 [ 31.894448] kasan_set_track+0x25/0x30 [ 31.894975] __kasan_slab_alloc+0x59/0x70 [ 31.895530] kmem_cache_alloc+0x16b/0x370 [ 31.896096] vm_area_dup+0x20/0x160 [ 31.896591] __split_vma+0x170/0x950 [ 31.897130] split_vma+0xc6/0x110 [ 31.897602] mprotect_fixup+0x8d2/0xb30 [ 31.898139] do_mprotect_pkey+0x87e/0xd40 [ 31.898702] __x64_sys_mprotect+0x78/0xc0 [ 31.899265] do_syscall_64+0x3f/0x90 [ 31.899787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.900478] [ 31.900708] Freed by task 212: [ 31.901144] kasan_save_stack+0x22/0x50 [ 31.901688] kasan_set_track+0x25/0x30 [ 31.902219] kasan_save_free_info+0x2b/0x50 [ 31.902792] __kasan_slab_free+0x10a/0x190 [ 31.903356] kmem_cache_free+0x10d/0x4d0 [ 31.903892] rcu_core+0x8c8/0x2860 [ 31.904379] __do_softirq+0x1b7/0x7d4 [ 31.904906] [ 31.905143] Last potentially related work creation: [ 31.905775] kasan_save_stack+0x22/0x50 [ 31.906337] __kasan_record_aux_stack+0x8e/0xa0 [ 31.906952] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.907650] remove_vma+0x139/0x170 [ 31.908140] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.908756] do_vmi_munmap+0x1f1/0x2b0 [ 31.909284] __vm_munmap+0x138/0x3a0 [ 31.909792] __x64_sys_munmap+0x59/0x80 [ 31.910328] do_syscall_64+0x3f/0x90 [ 31.910833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.911528] [ 31.911764] The buggy address belongs to the object at ffff88800db5e488 [ 31.911764] which belongs to the cache vm_area_struct of size 168 [ 31.913372] The buggy address is located 88 bytes inside of [ 31.913372] freed 168-byte region [ffff88800db5e488, ffff88800db5e530) [ 31.914894] [ 31.915126] The buggy address belongs to the physical page: [ 31.915841] page:000000009b4cf9d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb5e [ 31.917028] memcg:ffff8880182e7c01 [ 31.917501] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.918213] page_type: 0xffffffff() [ 31.918702] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.919700] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182e7c01 [ 31.920697] page dumped because: kasan: bad access detected [ 31.921423] [ 31.921660] Memory state around the buggy address: [ 31.922289] ffff88800db5e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.923202] ffff88800db5e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.924108] >ffff88800db5e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.925029] ^ [ 31.925841] ffff88800db5e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.926749] ffff88800db5e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.927650] ================================================================== [ 31.928729] Disabling lock debugging due to kernel taint [ 33.948438] BUG: Bad rss-counter state mm:00000000e19ebdff type:MM_FILEPAGES val:33 [ 33.949393] BUG: Bad rss-counter state mm:00000000e19ebdff type:MM_ANONPAGES val:22 [ 34.484214] BUG: Bad rss-counter state mm:000000005f8cd9db type:MM_FILEPAGES val:33 [ 34.485420] BUG: Bad rss-counter state mm:000000005f8cd9db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46059' (ECDSA) to the list of known hosts. 2023/06/20 11:04:09 fuzzer started 2023/06/20 11:04:09 dialing manager at localhost:36067 2023/06/20 11:04:09 checking machine... 2023/06/20 11:04:09 checking revisions... [ 35.135965] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:04:09 testing simple program... [ 35.186818] cgroup: Unknown subsys name 'net' [ 35.272666] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:04:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff860a1440 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860a1444 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ff8 R15=ffff88806ce09a98 RIP=ffffffff81131153 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 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=00007fa1d6299000 CR3=000000000eee4000 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=a3cff907c1d1ac96fd442131340fea8b XMM02=2c67c8bc2e329bc3000000000011d450 XMM03=fb795ef6d65770560000000000121bf0 XMM04=be76785e91e737ca00000000000ae988 XMM05=19e9129bd510f2350000000000131a68 XMM06=23b1cd779101f50d00000000001308d0 XMM07=e042d86d42eb936e0000000000121e70 XMM08=53a9baa09d985cc2000000000011d4b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000400 RSI=ffff88800eb9f390 RDI=ffff88800844f780 RBP=ffff88800844f780 RSP=ffff888018ccf700 R8 =ffff88800eb9f390 R9 =0000000000000000 R10=ffff888018ccf730 R11=ffffffff81806f71 R12=ffff88800eb9f390 R13=0000000000092cc0 R14=0000000000000000 R15=0000000000092cc0 RIP=ffffffff81810874 RFL=00000206 [-----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 00007f497408b900 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=00007ffeb06d3000 CR3=000000000c9c8000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000