syzkaller login: [ 38.668532] BUG: Bad rss-counter state mm:00000000ab1bee11 type:MM_FILEPAGES val:33 [ 38.669556] BUG: Bad rss-counter state mm:00000000ab1bee11 type:MM_ANONPAGES val:22 [ 38.828517] ================================================================== [ 38.829419] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.830376] Read of size 8 at addr ffff88800d5c8310 by task sshd/220 [ 38.831244] [ 38.831470] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.832373] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.833377] Call Trace: [ 38.833704] [ 38.834008] dump_stack_lvl+0x91/0xf0 [ 38.834507] print_report+0xcc/0x620 [ 38.835005] ? __virt_addr_valid+0x102/0x340 [ 38.835562] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.836205] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.836836] kasan_report+0xbe/0xf0 [ 38.837322] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.837947] vma_interval_tree_remove+0xc75/0xec0 [ 38.838546] vma_prepare+0xc54/0x11a0 [ 38.839030] __split_vma+0x5af/0x950 [ 38.839499] ? __pfx___split_vma+0x10/0x10 [ 38.840057] ? find_held_lock+0x2c/0x110 [ 38.840586] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.841149] ? lock_is_held_type+0x9f/0x120 [ 38.841685] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.842287] ? mtree_range_walk+0x632/0x900 [ 38.842846] ? mas_walk+0x5c7/0x7c0 [ 38.843326] do_vmi_munmap+0x1f1/0x2b0 [ 38.843832] mmap_region+0x1f9/0x2660 [ 38.844328] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.844843] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.845557] ? __pfx_lock_acquire+0x10/0x10 [ 38.846088] ? __pfx_mmap_region+0x10/0x10 [ 38.846621] ? security_mmap_addr+0x7d/0xa0 [ 38.847151] ? get_unmapped_area+0x1f5/0x3f0 [ 38.847715] do_mmap+0x854/0xf00 [ 38.848159] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.848652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.849216] ksys_mmap_pgoff+0x3af/0x500 [ 38.849720] do_syscall_64+0x3f/0x90 [ 38.850198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.850842] RIP: 0033:0x7f9b78db7d82 [ 38.851296] 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 [ 38.853417] RSP: 002b:00007fffb0b93338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.854325] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b78db7d82 [ 38.855170] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b781f1000 [ 38.856025] RBP: 00007f9b781f1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.856863] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6a4c2dec0 [ 38.857705] R13: 00007fffb0b93350 R14: 00007fffb0b93380 R15: 00007fffb0b936e0 [ 38.858554] [ 38.858847] [ 38.859060] Allocated by task 213: [ 38.859493] kasan_save_stack+0x22/0x50 [ 38.860011] kasan_set_track+0x25/0x30 [ 38.860500] __kasan_slab_alloc+0x59/0x70 [ 38.861018] kmem_cache_alloc+0x16b/0x370 [ 38.861537] vm_area_dup+0x20/0x160 [ 38.861992] __split_vma+0x170/0x950 [ 38.862458] split_vma+0xc6/0x110 [ 38.862895] mprotect_fixup+0x8d2/0xb30 [ 38.863393] do_mprotect_pkey+0x87e/0xd40 [ 38.863916] __x64_sys_mprotect+0x78/0xc0 [ 38.864432] do_syscall_64+0x3f/0x90 [ 38.864902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.865539] [ 38.865752] Freed by task 213: [ 38.866142] kasan_save_stack+0x22/0x50 [ 38.866644] kasan_set_track+0x25/0x30 [ 38.867135] kasan_save_free_info+0x2b/0x50 [ 38.867683] __kasan_slab_free+0x10a/0x190 [ 38.868250] kmem_cache_free+0x10d/0x4d0 [ 38.868789] rcu_core+0x8c8/0x2860 [ 38.869241] __do_softirq+0x1b7/0x7d4 [ 38.869722] [ 38.869936] Last potentially related work creation: [ 38.870522] kasan_save_stack+0x22/0x50 [ 38.871032] __kasan_record_aux_stack+0x8e/0xa0 [ 38.871616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.872264] remove_vma+0x139/0x170 [ 38.872720] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.873279] do_vmi_munmap+0x1f1/0x2b0 [ 38.873767] __vm_munmap+0x138/0x3a0 [ 38.874237] __x64_sys_munmap+0x59/0x80 [ 38.874739] do_syscall_64+0x3f/0x90 [ 38.875215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.875877] [ 38.876091] Second to last potentially related work creation: [ 38.876780] kasan_save_stack+0x22/0x50 [ 38.877283] __kasan_record_aux_stack+0x8e/0xa0 [ 38.877883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.878550] remove_vma+0x139/0x170 [ 38.879041] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.879646] do_vmi_munmap+0x1f1/0x2b0 [ 38.880150] mmap_region+0x1f9/0x2660 [ 38.880648] do_mmap+0x854/0xf00 [ 38.881105] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.881623] ksys_mmap_pgoff+0x3af/0x500 [ 38.882148] do_syscall_64+0x3f/0x90 [ 38.882658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.883336] [ 38.883556] The buggy address belongs to the object at ffff88800d5c82b8 [ 38.883556] which belongs to the cache vm_area_struct of size 168 [ 38.885098] The buggy address is located 88 bytes inside of [ 38.885098] freed 168-byte region [ffff88800d5c82b8, ffff88800d5c8360) [ 38.886564] [ 38.886784] The buggy address belongs to the physical page: [ 38.887463] page:00000000b8335459 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5c8 [ 38.888615] memcg:ffff88800954ab01 [ 38.889056] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.889725] page_type: 0xffffffff() [ 38.890194] raw: 0100000000000200 ffff8880087a0c80 ffffea00003e0d00 dead000000000002 [ 38.891154] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800954ab01 [ 38.892116] page dumped because: kasan: bad access detected [ 38.892808] [ 38.893033] Memory state around the buggy address: [ 38.893652] ffff88800d5c8200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.894556] ffff88800d5c8280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.895446] >ffff88800d5c8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.896343] ^ [ 38.896824] ffff88800d5c8380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.897714] ffff88800d5c8400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.898586] ================================================================== [ 38.899648] Disabling lock debugging due to kernel taint [ 40.793689] BUG: Bad rss-counter state mm:0000000093b22cb1 type:MM_FILEPAGES val:33 [ 40.794938] BUG: Bad rss-counter state mm:0000000093b22cb1 type:MM_ANONPAGES val:22 [ 41.279801] BUG: Bad rss-counter state mm:00000000ca9a9cdf type:MM_FILEPAGES val:33 [ 41.280873] BUG: Bad rss-counter state mm:00000000ca9a9cdf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22146' (ECDSA) to the list of known hosts. 2023/06/20 12:08:08 fuzzer started 2023/06/20 12:08:08 dialing manager at localhost:36067 2023/06/20 12:08:08 checking machine... 2023/06/20 12:08:08 checking revisions... [ 41.979215] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:08:08 testing simple program... [ 42.036567] cgroup: Unknown subsys name 'net' [ 42.096302] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:08:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86621200 RCX=ffffffff813a0b19 RDX=ffffffff8542a6c0 RSI=0000000086621200 RDI=0000000000000000 RBP=ffffffffffffffff RSP=ffff88806ce09a20 R8 =0000000000000006 R9 =ffffffff866212df R10=ffffffffffffffff R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888019869a00 RIP=ffffffff814c03a8 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=00007ffdfbb0ae98 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=00007f4cd17c3510000056326d99e790 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=0000000000000001 RBX=1ffff11001212f71 RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff888009097b78 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf361a0 R15=0000000000000000 RIP=ffffffff812d928f RFL=00000047 [---Z-PC] 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 00007fd9798fd900 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=00007fd979eb50b0 CR3=000000001bc34000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000