syzkaller login: [ 32.561404] BUG: Bad rss-counter state mm:000000008dc40f24 type:MM_FILEPAGES val:33 [ 32.562454] BUG: Bad rss-counter state mm:000000008dc40f24 type:MM_ANONPAGES val:22 [ 32.643571] ================================================================== [ 32.644498] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.645438] Read of size 8 at addr ffff888018d60310 by task sshd/220 [ 32.646297] [ 32.646583] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.647444] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.648422] Call Trace: [ 32.648758] [ 32.649043] dump_stack_lvl+0x91/0xf0 [ 32.649538] print_report+0xcc/0x620 [ 32.650023] ? __virt_addr_valid+0x102/0x340 [ 32.650587] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.651215] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.651852] kasan_report+0xbe/0xf0 [ 32.652331] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.652954] vma_interval_tree_remove+0xc75/0xec0 [ 32.653566] vma_prepare+0xc54/0x11a0 [ 32.654047] __split_vma+0x5af/0x950 [ 32.654548] ? __pfx___split_vma+0x10/0x10 [ 32.655078] ? find_held_lock+0x2c/0x110 [ 32.655606] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.656183] ? lock_is_held_type+0x9f/0x120 [ 32.656729] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.657346] ? mtree_range_walk+0x632/0x900 [ 32.657904] ? mas_walk+0x5c7/0x7c0 [ 32.658391] do_vmi_munmap+0x1f1/0x2b0 [ 32.658903] mmap_region+0x1f9/0x2660 [ 32.659392] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.659907] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.660625] ? __pfx_lock_acquire+0x10/0x10 [ 32.661161] ? __pfx_mmap_region+0x10/0x10 [ 32.661697] ? security_mmap_addr+0x7d/0xa0 [ 32.662232] ? get_unmapped_area+0x1f5/0x3f0 [ 32.662790] do_mmap+0x854/0xf00 [ 32.663242] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.663744] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.664319] ksys_mmap_pgoff+0x3af/0x500 [ 32.664832] do_syscall_64+0x3f/0x90 [ 32.665315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.665953] RIP: 0033:0x7f14afde0d82 [ 32.666415] 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 [ 32.668559] RSP: 002b:00007ffc7c872c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.669471] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f14afde0d82 [ 32.670322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f14af21a000 [ 32.671189] RBP: 00007f14af21a000 R08: 0000000000000009 R09: 0000000000001000 [ 32.672041] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e837ae3ec0 [ 32.672896] R13: 00007ffc7c872c90 R14: 00007ffc7c872cc0 R15: 00007ffc7c873020 [ 32.673757] [ 32.674050] [ 32.674267] Allocated by task 213: [ 32.674703] kasan_save_stack+0x22/0x50 [ 32.675209] kasan_set_track+0x25/0x30 [ 32.675704] __kasan_slab_alloc+0x59/0x70 [ 32.676232] kmem_cache_alloc+0x16b/0x370 [ 32.676751] vm_area_dup+0x20/0x160 [ 32.677200] __split_vma+0x170/0x950 [ 32.677670] split_vma+0xc6/0x110 [ 32.678107] mprotect_fixup+0x8d2/0xb30 [ 32.678629] do_mprotect_pkey+0x87e/0xd40 [ 32.679158] __x64_sys_mprotect+0x78/0xc0 [ 32.679684] do_syscall_64+0x3f/0x90 [ 32.680162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.680807] [ 32.681025] Freed by task 213: [ 32.681424] kasan_save_stack+0x22/0x50 [ 32.681931] kasan_set_track+0x25/0x30 [ 32.682436] kasan_save_free_info+0x2b/0x50 [ 32.682987] __kasan_slab_free+0x10a/0x190 [ 32.683525] kmem_cache_free+0x10d/0x4d0 [ 32.684036] rcu_core+0x8c8/0x2860 [ 32.684480] __do_softirq+0x1b7/0x7d4 [ 32.684962] [ 32.685180] Last potentially related work creation: [ 32.685770] kasan_save_stack+0x22/0x50 [ 32.686280] __kasan_record_aux_stack+0x8e/0xa0 [ 32.686883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.687581] remove_vma+0x139/0x170 [ 32.688036] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.688595] do_vmi_munmap+0x1f1/0x2b0 [ 32.689088] __vm_munmap+0x138/0x3a0 [ 32.689564] __x64_sys_munmap+0x59/0x80 [ 32.690064] do_syscall_64+0x3f/0x90 [ 32.690552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.691199] [ 32.691417] The buggy address belongs to the object at ffff888018d602b8 [ 32.691417] which belongs to the cache vm_area_struct of size 168 [ 32.692897] The buggy address is located 88 bytes inside of [ 32.692897] freed 168-byte region [ffff888018d602b8, ffff888018d60360) [ 32.694332] [ 32.694553] The buggy address belongs to the physical page: [ 32.695208] page:00000000a335ca0c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d60 [ 32.696312] memcg:ffff888017c6a101 [ 32.696744] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.697448] page_type: 0xffffffff() [ 32.697913] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.698861] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017c6a101 [ 32.699790] page dumped because: kasan: bad access detected [ 32.700459] [ 32.700673] Memory state around the buggy address: [ 32.701261] ffff888018d60200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.702129] ffff888018d60280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.703016] >ffff888018d60300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.703875] ^ [ 32.704350] ffff888018d60380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.705213] ffff888018d60400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.706068] ================================================================== [ 32.707013] Disabling lock debugging due to kernel taint [ 34.695990] BUG: Bad rss-counter state mm:000000006265f8ba type:MM_FILEPAGES val:33 [ 34.697151] BUG: Bad rss-counter state mm:000000006265f8ba type:MM_ANONPAGES val:22 [ 35.090393] BUG: Bad rss-counter state mm:00000000a79184a2 type:MM_FILEPAGES val:33 [ 35.091552] BUG: Bad rss-counter state mm:00000000a79184a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21578' (ECDSA) to the list of known hosts. 2023/06/19 15:26:37 fuzzer started 2023/06/19 15:26:38 dialing manager at localhost:44161 2023/06/19 15:26:38 checking machine... 2023/06/19 15:26:38 checking revisions... [ 35.804952] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:26:38 testing simple program... [ 35.852043] cgroup: Unknown subsys name 'net' [ 35.893283] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:26:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8613751a RDX=1ffff1100d9c135c RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8613751e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09de8 R15=ffff88806ce09a98 RIP=ffffffff81131c60 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=00007ffee8fdaff8 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=00007ff2ef66751000005636f2eda790 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=0000000000000001 RCX=0000000000000000 RDX=ffff88800f848000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff813c8a55 RSP=ffff888017ccf950 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000200 R11=7962206d65687420 R12=ffff888017ccf9d8 R13=ffffed1002f99f3c R14=ffffed1002f99f3b R15=ffff888017ccf9e0 RIP=ffffffff81534371 RFL=00000056 [---ZAP-] 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 00007fdb5e60f900 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=00007fff09c3d000 CR3=00000000159e4000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000