syzkaller login: [ 38.680883] sshd (212) used greatest stack depth: 23992 bytes left [ 38.682656] BUG: Bad rss-counter state mm:000000002cda2efa type:MM_FILEPAGES val:33 [ 38.683790] BUG: Bad rss-counter state mm:000000002cda2efa type:MM_ANONPAGES val:22 [ 38.772445] ================================================================== [ 38.773275] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.773985] Read of size 8 at addr ffff88800ea76310 by task sshd/219 [ 38.774564] [ 38.774729] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.775568] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.776338] Call Trace: [ 38.776590] [ 38.776807] dump_stack_lvl+0x91/0xf0 [ 38.777188] print_report+0xcc/0x620 [ 38.777569] ? __virt_addr_valid+0x102/0x340 [ 38.777993] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.778458] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.778923] kasan_report+0xbe/0xf0 [ 38.779283] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.779757] vma_interval_tree_remove+0xc75/0xec0 [ 38.780221] vma_prepare+0xc54/0x11a0 [ 38.780622] __split_vma+0x5af/0x950 [ 38.780925] ? __pfx___split_vma+0x10/0x10 [ 38.781194] ? find_held_lock+0x2c/0x110 [ 38.781463] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.781752] ? lock_is_held_type+0x9f/0x120 [ 38.782029] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.782337] ? mtree_range_walk+0x632/0x900 [ 38.782622] ? mas_walk+0x5c7/0x7c0 [ 38.782872] do_vmi_munmap+0x1f1/0x2b0 [ 38.783125] mmap_region+0x1f9/0x2660 [ 38.783372] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.783637] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.784000] ? __pfx_lock_acquire+0x10/0x10 [ 38.784272] ? __pfx_mmap_region+0x10/0x10 [ 38.784551] ? security_mmap_addr+0x7d/0xa0 [ 38.784824] ? get_unmapped_area+0x1f5/0x3f0 [ 38.785107] do_mmap+0x854/0xf00 [ 38.785331] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.785582] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.785867] ksys_mmap_pgoff+0x3af/0x500 [ 38.786126] do_syscall_64+0x3f/0x90 [ 38.786370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.786699] RIP: 0033:0x7f38aa374d82 [ 38.786936] 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 [ 38.787997] RSP: 002b:00007ffed727d6b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.788456] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38aa374d82 [ 38.788882] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38a97ae000 [ 38.789305] RBP: 00007f38a97ae000 R08: 0000000000000009 R09: 0000000000001000 [ 38.789730] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ded13eec0 [ 38.790155] R13: 00007ffed727d6d0 R14: 00007ffed727d700 R15: 00007ffed727da60 [ 38.790585] [ 38.790735] [ 38.790845] Allocated by task 212: [ 38.791062] kasan_save_stack+0x22/0x50 [ 38.791318] kasan_set_track+0x25/0x30 [ 38.791568] __kasan_slab_alloc+0x59/0x70 [ 38.791833] kmem_cache_alloc+0x16b/0x370 [ 38.792095] vm_area_dup+0x20/0x160 [ 38.792325] __split_vma+0x170/0x950 [ 38.792574] split_vma+0xc6/0x110 [ 38.792798] mprotect_fixup+0x8d2/0xb30 [ 38.793054] do_mprotect_pkey+0x87e/0xd40 [ 38.793317] __x64_sys_mprotect+0x78/0xc0 [ 38.793582] do_syscall_64+0x3f/0x90 [ 38.793825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.794150] [ 38.794261] Freed by task 212: [ 38.794459] kasan_save_stack+0x22/0x50 [ 38.794715] kasan_set_track+0x25/0x30 [ 38.794966] kasan_save_free_info+0x2b/0x50 [ 38.795235] __kasan_slab_free+0x10a/0x190 [ 38.795505] kmem_cache_free+0x10d/0x4d0 [ 38.795763] rcu_core+0x8c8/0x2860 [ 38.795988] __do_softirq+0x1b7/0x7d4 [ 38.796233] [ 38.796343] Last potentially related work creation: [ 38.796643] kasan_save_stack+0x22/0x50 [ 38.796899] __kasan_record_aux_stack+0x8e/0xa0 [ 38.797188] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.797513] remove_vma+0x139/0x170 [ 38.797742] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.798024] do_vmi_munmap+0x1f1/0x2b0 [ 38.798270] __vm_munmap+0x138/0x3a0 [ 38.798507] __x64_sys_munmap+0x59/0x80 [ 38.798759] do_syscall_64+0x3f/0x90 [ 38.799001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.799327] [ 38.799437] Second to last potentially related work creation: [ 38.799781] kasan_save_stack+0x22/0x50 [ 38.800037] __kasan_record_aux_stack+0x8e/0xa0 [ 38.800326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.800662] remove_vma+0x139/0x170 [ 38.800893] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.801174] do_vmi_munmap+0x1f1/0x2b0 [ 38.801419] __vm_munmap+0x138/0x3a0 [ 38.801656] elf_map+0x26f/0x310 [ 38.801885] load_elf_binary+0x3417/0x5030 [ 38.802153] bprm_execve+0x803/0x1940 [ 38.802389] do_execveat_common+0x734/0x8e0 [ 38.802654] __x64_sys_execve+0x93/0xc0 [ 38.802901] do_syscall_64+0x3f/0x90 [ 38.803140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.803462] [ 38.803571] The buggy address belongs to the object at ffff88800ea762b8 [ 38.803571] which belongs to the cache vm_area_struct of size 168 [ 38.804299] The buggy address is located 88 bytes inside of [ 38.804299] freed 168-byte region [ffff88800ea762b8, ffff88800ea76360) [ 38.805003] [ 38.805113] The buggy address belongs to the physical page: [ 38.805442] page:000000000eccf2b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea76 [ 38.805981] memcg:ffff88800dee1f01 [ 38.806196] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.806545] page_type: 0xffffffff() [ 38.806773] raw: 0100000000000200 ffff8880087a0c80 ffffea00005653c0 dead000000000005 [ 38.807230] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dee1f01 [ 38.807680] page dumped because: kasan: bad access detected [ 38.808009] [ 38.808119] Memory state around the buggy address: [ 38.808421] ffff88800ea76200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.808846] ffff88800ea76280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.809277] >ffff88800ea76300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.809699] ^ [ 38.809932] ffff88800ea76380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.810355] ffff88800ea76400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.810777] ================================================================== [ 38.811238] Disabling lock debugging due to kernel taint [ 41.082302] BUG: Bad rss-counter state mm:000000004d180a45 type:MM_FILEPAGES val:33 [ 41.083035] BUG: Bad rss-counter state mm:000000004d180a45 type:MM_ANONPAGES val:22 [ 41.581296] BUG: Bad rss-counter state mm:00000000cbd97c11 type:MM_FILEPAGES val:33 [ 41.582307] BUG: Bad rss-counter state mm:00000000cbd97c11 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28053' (ECDSA) to the list of known hosts. 2023/06/20 16:56:34 fuzzer started 2023/06/20 16:56:35 dialing manager at localhost:36067 2023/06/20 16:56:35 checking machine... 2023/06/20 16:56:35 checking revisions... [ 42.292219] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:56:35 testing simple program... [ 42.341557] cgroup: Unknown subsys name 'net' [ 42.378873] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:56:34 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6b RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88800f1c7c88 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d7d R12=ffffffff8560b640 R13=ffffffff818276ca R14=ffffffff813782f8 R15=ffff88800db7e000 RIP=ffffffff8180f184 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f89d53db900 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=00007fe5ccb2e650 CR3=00000000095d4000 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=ffff000000000000ff00000000000000 XMM02=65732e64766564752d646d6574737973 XMM03=00007f006563696c732e6d6574737973 XMM04=1445ce119a5361f900000000000ae988 XMM05=ef7994ed86ba82ee00000000001356e0 XMM06=2d4fe5d9185c11070000000000134110 XMM07=00000000000000000000000000000000 XMM08=3d454e494c444d435f5443454a424f00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880180b8000 RCX=ffffffffffffffff RDX=00000000ffffffff RSI=0000000000000015 RDI=ffff88800fccc000 RBP=0000000000000015 RSP=ffff888009527a28 R8 =0000000000000000 R9 =fffff940000ecca0 R10=ffffea0000766507 R11=0000000000000128 R12=00000000ffffffff R13=ffff88807ffdc000 R14=ffff88800fccc000 R15=ffffea0000766500 RIP=ffffffff8182dea0 RFL=00000086 [--S--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 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=00007ffd7697a8c8 CR3=000000000e4ba000 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=2034333a36353a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a36353a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000