syzkaller login: [ 38.748769] BUG: Bad rss-counter state mm:00000000183a81b5 type:MM_FILEPAGES val:33 [ 38.749912] BUG: Bad rss-counter state mm:00000000183a81b5 type:MM_ANONPAGES val:22 [ 38.916009] ================================================================== [ 38.916980] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.917965] Read of size 8 at addr ffff88801a12c310 by task sshd/220 [ 38.918759] [ 38.919103] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.920007] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.921028] Call Trace: [ 38.921350] [ 38.921649] dump_stack_lvl+0x91/0xf0 [ 38.922155] print_report+0xcc/0x620 [ 38.922653] ? __virt_addr_valid+0x102/0x340 [ 38.923226] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.923872] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.924527] kasan_report+0xbe/0xf0 [ 38.925037] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.925684] vma_interval_tree_remove+0xc75/0xec0 [ 38.926305] vma_prepare+0xc54/0x11a0 [ 38.926806] __split_vma+0x5af/0x950 [ 38.927298] ? __pfx___split_vma+0x10/0x10 [ 38.927851] ? find_held_lock+0x2c/0x110 [ 38.928403] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.929001] ? lock_is_held_type+0x9f/0x120 [ 38.929588] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.930208] ? mtree_range_walk+0x632/0x900 [ 38.930785] ? mas_walk+0x5c7/0x7c0 [ 38.931292] do_vmi_munmap+0x1f1/0x2b0 [ 38.931799] mmap_region+0x1f9/0x2660 [ 38.932306] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.932853] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.933599] ? __pfx_lock_acquire+0x10/0x10 [ 38.934163] ? __pfx_mmap_region+0x10/0x10 [ 38.934736] ? security_mmap_addr+0x7d/0xa0 [ 38.935294] ? get_unmapped_area+0x1f5/0x3f0 [ 38.935870] do_mmap+0x854/0xf00 [ 38.936321] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.936864] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.937453] ksys_mmap_pgoff+0x3af/0x500 [ 38.937980] do_syscall_64+0x3f/0x90 [ 38.938480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.939156] RIP: 0033:0x7f26fd890d82 [ 38.939621] 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 [ 38.941737] RSP: 002b:00007ffda13b9138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.942653] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26fd890d82 [ 38.943517] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26fccca000 [ 38.944365] RBP: 00007f26fccca000 R08: 0000000000000009 R09: 0000000000001000 [ 38.945228] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603e4e7dec0 [ 38.946072] R13: 00007ffda13b9150 R14: 00007ffda13b9180 R15: 00007ffda13b94e0 [ 38.946937] [ 38.947232] [ 38.947451] Allocated by task 213: [ 38.947879] kasan_save_stack+0x22/0x50 [ 38.948386] kasan_set_track+0x25/0x30 [ 38.948898] __kasan_slab_alloc+0x59/0x70 [ 38.949415] kmem_cache_alloc+0x16b/0x370 [ 38.949932] vm_area_dup+0x20/0x160 [ 38.950397] __split_vma+0x170/0x950 [ 38.950862] split_vma+0xc6/0x110 [ 38.951303] mprotect_fixup+0x8d2/0xb30 [ 38.951808] do_mprotect_pkey+0x87e/0xd40 [ 38.952329] __x64_sys_mprotect+0x78/0xc0 [ 38.952862] do_syscall_64+0x3f/0x90 [ 38.953339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953983] [ 38.954202] Freed by task 213: [ 38.954591] kasan_save_stack+0x22/0x50 [ 38.955095] kasan_set_track+0x25/0x30 [ 38.955593] kasan_save_free_info+0x2b/0x50 [ 38.956124] __kasan_slab_free+0x10a/0x190 [ 38.956675] kmem_cache_free+0x10d/0x4d0 [ 38.957184] rcu_core+0x8c8/0x2860 [ 38.957629] __do_softirq+0x1b7/0x7d4 [ 38.958108] [ 38.958322] Last potentially related work creation: [ 38.958902] kasan_save_stack+0x22/0x50 [ 38.959404] __kasan_record_aux_stack+0x8e/0xa0 [ 38.959982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.960625] remove_vma+0x139/0x170 [ 38.961082] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.961634] do_vmi_munmap+0x1f1/0x2b0 [ 38.962117] __vm_munmap+0x138/0x3a0 [ 38.962589] __x64_sys_munmap+0x59/0x80 [ 38.963085] do_syscall_64+0x3f/0x90 [ 38.963555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.964192] [ 38.964409] The buggy address belongs to the object at ffff88801a12c2b8 [ 38.964409] which belongs to the cache vm_area_struct of size 168 [ 38.965879] The buggy address is located 88 bytes inside of [ 38.965879] freed 168-byte region [ffff88801a12c2b8, ffff88801a12c360) [ 38.967258] [ 38.967479] The buggy address belongs to the physical page: [ 38.968133] page:000000001e54a557 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a12c [ 38.969236] memcg:ffff888016ce7c01 [ 38.969661] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.970297] page_type: 0xffffffff() [ 38.970749] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.971663] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ce7c01 [ 38.972558] page dumped because: kasan: bad access detected [ 38.973229] [ 38.973448] Memory state around the buggy address: [ 38.974023] ffff88801a12c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.974877] ffff88801a12c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.975726] >ffff88801a12c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.976579] ^ [ 38.977065] ffff88801a12c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.977920] ffff88801a12c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.978765] ================================================================== [ 38.979818] Disabling lock debugging due to kernel taint [ 41.296645] BUG: Bad rss-counter state mm:000000007d3d507f type:MM_FILEPAGES val:33 [ 41.297813] BUG: Bad rss-counter state mm:000000007d3d507f type:MM_ANONPAGES val:22 [ 41.698832] BUG: Bad rss-counter state mm:00000000cfeeb570 type:MM_FILEPAGES val:33 [ 41.700060] BUG: Bad rss-counter state mm:00000000cfeeb570 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20902' (ECDSA) to the list of known hosts. 2023/06/20 15:14:39 fuzzer started 2023/06/20 15:14:39 dialing manager at localhost:36067 2023/06/20 15:14:39 checking machine... 2023/06/20 15:14:39 checking revisions... [ 42.406671] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:14:39 testing simple program... [ 42.455715] cgroup: Unknown subsys name 'net' [ 42.521357] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:14:38 Registers: info registers vcpu 0 RAX=ffffffff864b6d21 RBX=0000000000000002 RCX=ffffffff864b6d1e RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff864b6d20 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09fe8 R15=ffff88806ce09a98 RIP=ffffffff811311ed 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 00007f111a073900 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=00007f111a62a618 CR3=000000001bd6a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fb04148fa50 CR3=000000000ca1a000 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=3f63668ab6f709ac5c4f214bbd18c217 XMM02=2c67c8bc2e329bc3000000000011ad40 XMM03=fb795ef6d657705600000000001216e0 XMM04=3b7facf5d311afad00000000000ae988 XMM05=19e9129bd510f2350000000000131278 XMM06=441861cf9b83d74c0000000000130450 XMM07=e042d86d42eb936e0000000000121960 XMM08=4cd6c28dce0f5d34000000000011ada0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000