syzkaller login: [ 30.539237] BUG: Bad rss-counter state mm:000000009a971103 type:MM_FILEPAGES val:33 [ 30.540283] BUG: Bad rss-counter state mm:000000009a971103 type:MM_ANONPAGES val:22 [ 30.701096] ================================================================== [ 30.702180] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.703394] Read of size 8 at addr ffff88800dfcddf0 by task sshd/220 [ 30.704393] [ 30.704662] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.705509] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.706428] Call Trace: [ 30.706728] [ 30.706998] dump_stack_lvl+0x91/0xf0 [ 30.707461] print_report+0xcc/0x620 [ 30.707926] ? __virt_addr_valid+0x102/0x340 [ 30.708446] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.709031] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.709609] kasan_report+0xbe/0xf0 [ 30.710058] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710647] vma_interval_tree_remove+0xc75/0xec0 [ 30.711221] vma_prepare+0xc54/0x11a0 [ 30.711678] __split_vma+0x5af/0x950 [ 30.712142] ? __pfx___split_vma+0x10/0x10 [ 30.712646] ? find_held_lock+0x2c/0x110 [ 30.713145] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.713681] ? lock_is_held_type+0x9f/0x120 [ 30.714194] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.714768] ? mtree_range_walk+0x632/0x900 [ 30.715294] ? mas_walk+0x5c7/0x7c0 [ 30.715751] do_vmi_munmap+0x1f1/0x2b0 [ 30.716239] mmap_region+0x1f9/0x2660 [ 30.716698] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.717185] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.717861] ? __pfx_lock_acquire+0x10/0x10 [ 30.718374] ? __pfx_mmap_region+0x10/0x10 [ 30.718884] ? security_mmap_addr+0x7d/0xa0 [ 30.719510] ? get_unmapped_area+0x1f5/0x3f0 [ 30.720165] do_mmap+0x854/0xf00 [ 30.720681] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.721264] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.721927] ksys_mmap_pgoff+0x3af/0x500 [ 30.722528] do_syscall_64+0x3f/0x90 [ 30.723091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.723859] RIP: 0033:0x7f7f75f4fd82 [ 30.724423] 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 [ 30.726943] RSP: 002b:00007ffc431a6f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.728021] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f75f4fd82 [ 30.729023] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f75389000 [ 30.730028] RBP: 00007f7f75389000 R08: 0000000000000009 R09: 0000000000001000 [ 30.731027] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556285afbec0 [ 30.732037] R13: 00007ffc431a6f20 R14: 00007ffc431a6f50 R15: 00007ffc431a72b0 [ 30.733052] [ 30.733394] [ 30.733647] Allocated by task 213: [ 30.734151] kasan_save_stack+0x22/0x50 [ 30.734746] kasan_set_track+0x25/0x30 [ 30.735328] __kasan_slab_alloc+0x59/0x70 [ 30.735964] kmem_cache_alloc+0x16b/0x370 [ 30.736571] vm_area_dup+0x20/0x160 [ 30.737102] __split_vma+0x170/0x950 [ 30.737651] split_vma+0xc6/0x110 [ 30.738169] mprotect_fixup+0x8d2/0xb30 [ 30.738760] do_mprotect_pkey+0x87e/0xd40 [ 30.739371] __x64_sys_mprotect+0x78/0xc0 [ 30.739993] do_syscall_64+0x3f/0x90 [ 30.740649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.741433] [ 30.741689] Freed by task 213: [ 30.742151] kasan_save_stack+0x22/0x50 [ 30.742744] kasan_set_track+0x25/0x30 [ 30.743325] kasan_save_free_info+0x2b/0x50 [ 30.743966] __kasan_slab_free+0x10a/0x190 [ 30.744592] kmem_cache_free+0x10d/0x4d0 [ 30.745232] rcu_core+0x8c8/0x2860 [ 30.745754] __do_softirq+0x1b7/0x7d4 [ 30.746313] [ 30.746565] Last potentially related work creation: [ 30.747253] kasan_save_stack+0x22/0x50 [ 30.747846] __kasan_record_aux_stack+0x8e/0xa0 [ 30.748535] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.749290] remove_vma+0x139/0x170 [ 30.749823] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.750479] do_vmi_munmap+0x1f1/0x2b0 [ 30.751051] __vm_munmap+0x138/0x3a0 [ 30.751602] __x64_sys_munmap+0x59/0x80 [ 30.752196] do_syscall_64+0x3f/0x90 [ 30.752755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.753515] [ 30.753766] Second to last potentially related work creation: [ 30.754574] kasan_save_stack+0x22/0x50 [ 30.755164] __kasan_record_aux_stack+0x8e/0xa0 [ 30.755838] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.756607] remove_vma+0x139/0x170 [ 30.757138] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.757792] do_vmi_munmap+0x1f1/0x2b0 [ 30.758362] mmap_region+0x1f9/0x2660 [ 30.758927] do_mmap+0x854/0xf00 [ 30.759434] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.760019] ksys_mmap_pgoff+0x3af/0x500 [ 30.760614] do_syscall_64+0x3f/0x90 [ 30.761171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.761931] [ 30.762182] The buggy address belongs to the object at ffff88800dfcdd98 [ 30.762182] which belongs to the cache vm_area_struct of size 168 [ 30.763931] The buggy address is located 88 bytes inside of [ 30.763931] freed 168-byte region [ffff88800dfcdd98, ffff88800dfcde40) [ 30.765590] [ 30.765843] The buggy address belongs to the physical page: [ 30.766618] page:00000000f8519679 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfcd [ 30.767889] memcg:ffff88800d5bb301 [ 30.768400] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.769161] page_type: 0xffffffff() [ 30.769691] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.770776] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5bb301 [ 30.771848] page dumped because: kasan: bad access detected [ 30.772637] [ 30.772888] Memory state around the buggy address: [ 30.773572] ffff88800dfcdc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.774584] ffff88800dfcdd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.775593] >ffff88800dfcdd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.776620] ^ [ 30.777574] ffff88800dfcde00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.778582] ffff88800dfcde80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.779584] ================================================================== [ 30.780696] Disabling lock debugging due to kernel taint [ 32.691781] BUG: Bad rss-counter state mm:00000000d1284b02 type:MM_FILEPAGES val:33 [ 32.692997] BUG: Bad rss-counter state mm:00000000d1284b02 type:MM_ANONPAGES val:22 [ 33.265229] BUG: Bad rss-counter state mm:0000000036623eaa type:MM_FILEPAGES val:33 [ 33.266394] BUG: Bad rss-counter state mm:0000000036623eaa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4393' (ECDSA) to the list of known hosts. 2023/06/20 11:49:25 fuzzer started 2023/06/20 11:49:25 dialing manager at localhost:36067 2023/06/20 11:49:25 checking machine... 2023/06/20 11:49:25 checking revisions... [ 33.926400] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:49:25 testing simple program... [ 33.975810] cgroup: Unknown subsys name 'net' [ 34.027123] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:49:25 Registers: info registers vcpu 0 RAX=ffff88800d96f400 RBX=ffff88800d96f400 RCX=0000000000000000 RDX=1ffff11001b2de9f RSI=ffffffff818a8251 RDI=ffff88800d96f4f8 RBP=dffffc0000000000 RSP=ffff88800fd3fb10 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff88800d96f400 R11=00000000000b6a61 R12=ffff88800fd3fc48 R13=ffff88800fd3fdf0 R14=0000000000000001 R15=ffff88800fd3fdf0 RIP=ffffffff818a827e 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 00007f45d3b6e900 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=00007f45d41260b0 CR3=000000000eb90000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f1fa57da970 CR3=000000000947a000 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=f27692f1f4d72191b94ebf5426f9567c XMM02=2c67c8bc2e329bc3000000000011d0b0 XMM03=fb795ef6d65770560000000000121778 XMM04=e0f28d90a2a5494500000000000ae988 XMM05=e4cb8bb95a7664b600000000001328a8 XMM06=597dc270411684710000000000131710 XMM07=e042d86d42eb936e00000000001219f8 XMM08=7339fccc7818975c000000000011d110 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000