syzkaller login: [ 30.584005] BUG: Bad rss-counter state mm:00000000d84044b3 type:MM_FILEPAGES val:33 [ 30.585004] BUG: Bad rss-counter state mm:00000000d84044b3 type:MM_ANONPAGES val:22 [ 30.757764] ================================================================== [ 30.758865] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.760053] Read of size 8 at addr ffff8880195c5140 by task sshd/220 [ 30.760967] [ 30.761186] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.762054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.763043] Call Trace: [ 30.763381] [ 30.763672] dump_stack_lvl+0x91/0xf0 [ 30.764179] print_report+0xcc/0x620 [ 30.764663] ? __virt_addr_valid+0x102/0x340 [ 30.765219] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.765844] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.766474] kasan_report+0xbe/0xf0 [ 30.766956] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.767584] vma_interval_tree_remove+0xc75/0xec0 [ 30.768192] vma_prepare+0xc54/0x11a0 [ 30.768677] __split_vma+0x5af/0x950 [ 30.769158] ? __pfx___split_vma+0x10/0x10 [ 30.769690] ? find_held_lock+0x2c/0x110 [ 30.770219] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.770787] ? lock_is_held_type+0x9f/0x120 [ 30.771355] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.771973] ? mtree_range_walk+0x632/0x900 [ 30.772535] ? mas_walk+0x5c7/0x7c0 [ 30.773013] do_vmi_munmap+0x1f1/0x2b0 [ 30.773507] mmap_region+0x1f9/0x2660 [ 30.773990] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.774500] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.775228] ? __pfx_lock_acquire+0x10/0x10 [ 30.775770] ? __pfx_mmap_region+0x10/0x10 [ 30.776304] ? security_mmap_addr+0x7d/0xa0 [ 30.776840] ? get_unmapped_area+0x1f5/0x3f0 [ 30.777390] do_mmap+0x854/0xf00 [ 30.777829] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.778324] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.778887] ksys_mmap_pgoff+0x3af/0x500 [ 30.779409] do_syscall_64+0x3f/0x90 [ 30.779893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.780543] RIP: 0033:0x7f09e4aacd82 [ 30.781002] 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 [ 30.783142] RSP: 002b:00007ffef954f198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.784083] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09e4aacd82 [ 30.784942] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f09e3ee6000 [ 30.785803] RBP: 00007f09e3ee6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.786658] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eab0ddbec0 [ 30.787522] R13: 00007ffef954f1b0 R14: 00007ffef954f1e0 R15: 00007ffef954f540 [ 30.788390] [ 30.788683] [ 30.788903] Allocated by task 213: [ 30.789335] kasan_save_stack+0x22/0x50 [ 30.789843] kasan_set_track+0x25/0x30 [ 30.790337] __kasan_slab_alloc+0x59/0x70 [ 30.790867] kmem_cache_alloc+0x16b/0x370 [ 30.791394] vm_area_dup+0x20/0x160 [ 30.791854] __split_vma+0x170/0x950 [ 30.792328] split_vma+0xc6/0x110 [ 30.792769] mprotect_fixup+0x8d2/0xb30 [ 30.793284] do_mprotect_pkey+0x87e/0xd40 [ 30.793836] __x64_sys_mprotect+0x78/0xc0 [ 30.794357] do_syscall_64+0x3f/0x90 [ 30.794855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795546] [ 30.795763] Freed by task 213: [ 30.796167] kasan_save_stack+0x22/0x50 [ 30.796691] kasan_set_track+0x25/0x30 [ 30.797213] kasan_save_free_info+0x2b/0x50 [ 30.797757] __kasan_slab_free+0x10a/0x190 [ 30.798296] kmem_cache_free+0x10d/0x4d0 [ 30.798820] rcu_core+0x8c8/0x2860 [ 30.799263] __do_softirq+0x1b7/0x7d4 [ 30.799749] [ 30.799966] Last potentially related work creation: [ 30.800556] kasan_save_stack+0x22/0x50 [ 30.801066] __kasan_record_aux_stack+0x8e/0xa0 [ 30.801652] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.802301] remove_vma+0x139/0x170 [ 30.802754] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.803343] do_vmi_munmap+0x1f1/0x2b0 [ 30.803830] __vm_munmap+0x138/0x3a0 [ 30.804301] __x64_sys_munmap+0x59/0x80 [ 30.804804] do_syscall_64+0x3f/0x90 [ 30.805286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.805940] [ 30.806158] The buggy address belongs to the object at ffff8880195c50e8 [ 30.806158] which belongs to the cache vm_area_struct of size 168 [ 30.807659] The buggy address is located 88 bytes inside of [ 30.807659] freed 168-byte region [ffff8880195c50e8, ffff8880195c5190) [ 30.809072] [ 30.809289] The buggy address belongs to the physical page: [ 30.809948] page:00000000ec706121 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x195c5 [ 30.811037] memcg:ffff8880195c6001 [ 30.811481] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.812176] page_type: 0xffffffff() [ 30.812632] raw: 0100000000000200 ffff8880087a0c80 ffffea000051c2c0 dead000000000007 [ 30.813556] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880195c6001 [ 30.814475] page dumped because: kasan: bad access detected [ 30.815143] [ 30.815379] Memory state around the buggy address: [ 30.815962] ffff8880195c5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.816823] ffff8880195c5080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.817685] >ffff8880195c5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.818535] ^ [ 30.819182] ffff8880195c5180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.820040] ffff8880195c5200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.820892] ================================================================== [ 30.822151] Disabling lock debugging due to kernel taint [ 33.685592] BUG: Bad rss-counter state mm:00000000d43fea11 type:MM_FILEPAGES val:33 [ 33.686771] BUG: Bad rss-counter state mm:00000000d43fea11 type:MM_ANONPAGES val:22 [ 34.040357] BUG: Bad rss-counter state mm:000000004857b334 type:MM_FILEPAGES val:33 [ 34.041366] BUG: Bad rss-counter state mm:000000004857b334 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8927' (ECDSA) to the list of known hosts. 2023/06/20 17:39:33 fuzzer started 2023/06/20 17:39:33 dialing manager at localhost:36067 2023/06/20 17:39:33 checking machine... 2023/06/20 17:39:33 checking revisions... [ 34.759185] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:39:34 testing simple program... [ 34.810223] cgroup: Unknown subsys name 'net' [ 34.866457] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:39:33 Registers: info registers vcpu 0 RAX=beff958bf0c21900 RBX=1ffff11002b12e86 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888015897420 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8edd RFL=00000282 [--S----] 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 00007fe1eb1b2900 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=00007fe1ea61fb00 CR3=000000001009c000 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=029684f9dc2bdc8523476f6defbf8492 XMM02=000000000011d930eff9b2d0a8fce9cb XMM03=000000000011da002c67c8bc2e329bc3 XMM04=942b171ab3c88fbc00000000000ae988 XMM05=0a6a75b73dc2a0540000000000133080 XMM06=07bb6ce36d4e5c980000000000131e20 XMM07=fb795ef6d65770560000000000122068 XMM08=2c67c8bc2e329bc3000000000011d9a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880115afeb0 RBX=ffff8880115b6ea8 RCX=ffffffff812e0135 RDX=dffffc0000000000 RSI=ffff888018bc85a0 RDI=ffff8880115b6ee0 RBP=ffff8880115b6eb8 RSP=ffff8880169cfc58 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888018bc8468 R13=0000000000000000 R14=ffff88800e6c99c8 R15=ffff88800e6c9980 RIP=ffffffff81847695 RFL=00000083 [--S---C] 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 00007fc999717900 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=00007ffc650cc000 CR3=000000000f334000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000