syzkaller login: [ 38.760937] sshd (212) used greatest stack depth: 24128 bytes left [ 38.763164] BUG: Bad rss-counter state mm:0000000092b44b55 type:MM_FILEPAGES val:33 [ 38.765073] BUG: Bad rss-counter state mm:0000000092b44b55 type:MM_ANONPAGES val:22 [ 38.927766] ================================================================== [ 38.928804] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.929830] Read of size 8 at addr ffff88801aa3a6b0 by task sshd/219 [ 38.930842] [ 38.931085] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.932048] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.933124] Call Trace: [ 38.933484] [ 38.933797] dump_stack_lvl+0x91/0xf0 [ 38.934335] print_report+0xcc/0x620 [ 38.934863] ? __virt_addr_valid+0x102/0x340 [ 38.935477] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.936162] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.936832] kasan_report+0xbe/0xf0 [ 38.937353] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.938034] vma_interval_tree_remove+0xc75/0xec0 [ 38.938698] vma_prepare+0xc54/0x11a0 [ 38.939236] __split_vma+0x5af/0x950 [ 38.939769] ? __pfx___split_vma+0x10/0x10 [ 38.940354] ? find_held_lock+0x2c/0x110 [ 38.940927] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.941549] ? lock_is_held_type+0x9f/0x120 [ 38.942152] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.942812] ? mtree_range_walk+0x632/0x900 [ 38.943428] ? mas_walk+0x5c7/0x7c0 [ 38.943946] do_vmi_munmap+0x1f1/0x2b0 [ 38.944490] mmap_region+0x1f9/0x2660 [ 38.945024] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.945593] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.946382] ? __pfx_lock_acquire+0x10/0x10 [ 38.946967] ? __pfx_mmap_region+0x10/0x10 [ 38.947553] ? security_mmap_addr+0x7d/0xa0 [ 38.948145] ? get_unmapped_area+0x1f5/0x3f0 [ 38.948753] do_mmap+0x854/0xf00 [ 38.949237] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.949783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.950403] ksys_mmap_pgoff+0x3af/0x500 [ 38.950964] do_syscall_64+0x3f/0x90 [ 38.951504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.952214] RIP: 0033:0x7f33814fed82 [ 38.952727] 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 [ 38.955047] RSP: 002b:00007fff61643ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.956029] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33814fed82 [ 38.956955] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3380938000 [ 38.957882] RBP: 00007f3380938000 R08: 0000000000000009 R09: 0000000000001000 [ 38.958815] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb7b37ff60 [ 38.959746] R13: 00007fff61643d00 R14: 00007fff61643d30 R15: 00007fff61644090 [ 38.960687] [ 38.961011] [ 38.961248] Allocated by task 212: [ 38.961713] kasan_save_stack+0x22/0x50 [ 38.962265] kasan_set_track+0x25/0x30 [ 38.962800] __kasan_slab_alloc+0x59/0x70 [ 38.963389] kmem_cache_alloc+0x16b/0x370 [ 38.963951] vm_area_dup+0x20/0x160 [ 38.964451] __split_vma+0x170/0x950 [ 38.964958] split_vma+0xc6/0x110 [ 38.965437] mprotect_fixup+0x8d2/0xb30 [ 38.965981] do_mprotect_pkey+0x87e/0xd40 [ 38.966543] __x64_sys_mprotect+0x78/0xc0 [ 38.967103] do_syscall_64+0x3f/0x90 [ 38.967631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.968322] [ 38.968553] Freed by task 212: [ 38.968977] kasan_save_stack+0x22/0x50 [ 38.969520] kasan_set_track+0x25/0x30 [ 38.970054] kasan_save_free_info+0x2b/0x50 [ 38.970628] __kasan_slab_free+0x10a/0x190 [ 38.971199] kmem_cache_free+0x10d/0x4d0 [ 38.971840] rcu_core+0x8c8/0x2860 [ 38.972321] __do_softirq+0x1b7/0x7d4 [ 38.972834] [ 38.973065] Last potentially related work creation: [ 38.973692] kasan_save_stack+0x22/0x50 [ 38.974236] __kasan_record_aux_stack+0x8e/0xa0 [ 38.974852] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.975557] remove_vma+0x139/0x170 [ 38.976042] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.976638] do_vmi_munmap+0x1f1/0x2b0 [ 38.977153] __vm_munmap+0x138/0x3a0 [ 38.977649] __x64_sys_munmap+0x59/0x80 [ 38.978177] do_syscall_64+0x3f/0x90 [ 38.978684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.979376] [ 38.979607] The buggy address belongs to the object at ffff88801aa3a658 [ 38.979607] which belongs to the cache vm_area_struct of size 168 [ 38.981174] The buggy address is located 88 bytes inside of [ 38.981174] freed 168-byte region [ffff88801aa3a658, ffff88801aa3a700) [ 38.982674] [ 38.982903] The buggy address belongs to the physical page: [ 38.983619] page:000000003ebcc375 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aa3a [ 38.984782] memcg:ffff88801a861201 [ 38.985242] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.985931] page_type: 0xffffffff() [ 38.986413] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.987400] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a861201 [ 38.988363] page dumped because: kasan: bad access detected [ 38.989065] [ 38.989294] Memory state around the buggy address: [ 38.989908] ffff88801aa3a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.990810] ffff88801aa3a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.991726] >ffff88801aa3a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.992629] ^ [ 38.993247] ffff88801aa3a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.994148] ffff88801aa3a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.995046] ================================================================== [ 38.996077] Disabling lock debugging due to kernel taint [ 41.609021] BUG: Bad rss-counter state mm:0000000091e44059 type:MM_FILEPAGES val:33 [ 41.610203] BUG: Bad rss-counter state mm:0000000091e44059 type:MM_ANONPAGES val:22 [ 42.093992] BUG: Bad rss-counter state mm:0000000013339ea4 type:MM_FILEPAGES val:33 [ 42.095244] BUG: Bad rss-counter state mm:0000000013339ea4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22994' (ECDSA) to the list of known hosts. 2023/06/19 12:16:51 fuzzer started 2023/06/19 12:16:51 dialing manager at localhost:44161 2023/06/19 12:16:51 checking machine... 2023/06/19 12:16:51 checking revisions... [ 42.807857] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:16:51 testing simple program... [ 42.861674] cgroup: Unknown subsys name 'net' [ 42.906832] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:16:43 Registers: info registers vcpu 0 RAX=ffff88806ce40df0 RBX=0000000000000dc0 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=00000000000da300 RBP=ffff888006aafad0 RSP=ffff888006aafa80 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff8880087b6780 R13=ffff88800d2f8b00 R14=0000000000000000 R15=ffffffff8186cb26 RIP=ffffffff81807e24 RFL=00000286 [--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 00007f127f460900 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=00007f127fa15650 CR3=0000000006920000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888014740001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801473fd01 RSI=ffff88801473fde0 RDI=ffff88801473f450 RBP=ffff88801473f498 RSP=ffff88801473f3b8 R8 =0000000000000001 R9 =ffff88801473f480 R10=0000000000038001 R11=000000000008ab76 R12=ffff88801473f4a0 R13=ffff888014738000 R14=ffff88801473fde0 R15=ffff88801473f440 RIP=ffffffff811304d1 RFL=00000296 [--S-AP-] 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 00007f0663d59900 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=00007f06631b4480 CR3=000000001450e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f8a5481ecdbe1eb300000000000ae988 XMM05=c82506f670f404100000000000135c68 XMM06=19e9129bd510f2350000000000134b00 XMM07=fb795ef6d65770560000000000124db8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000