syzkaller login: [ 30.662385] BUG: Bad rss-counter state mm:0000000097178b70 type:MM_FILEPAGES val:33 [ 30.663339] BUG: Bad rss-counter state mm:0000000097178b70 type:MM_ANONPAGES val:22 [ 30.702035] ================================================================== [ 30.703127] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.704244] Read of size 8 at addr ffff888014766df0 by task sshd/219 [ 30.705184] [ 30.705402] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.706367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.707410] Call Trace: [ 30.707726] [ 30.708022] dump_stack_lvl+0x91/0xf0 [ 30.708514] print_report+0xcc/0x620 [ 30.708997] ? __virt_addr_valid+0x102/0x340 [ 30.709543] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710156] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710787] kasan_report+0xbe/0xf0 [ 30.711268] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.711892] vma_interval_tree_remove+0xc75/0xec0 [ 30.712494] vma_prepare+0xc54/0x11a0 [ 30.712975] __split_vma+0x5af/0x950 [ 30.713446] ? __pfx___split_vma+0x10/0x10 [ 30.713965] ? find_held_lock+0x2c/0x110 [ 30.714483] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.715051] ? lock_is_held_type+0x9f/0x120 [ 30.715598] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.716196] ? mtree_range_walk+0x632/0x900 [ 30.716745] ? mas_walk+0x5c7/0x7c0 [ 30.717219] do_vmi_munmap+0x1f1/0x2b0 [ 30.717708] mmap_region+0x1f9/0x2660 [ 30.718185] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.718722] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.719436] ? __pfx_lock_acquire+0x10/0x10 [ 30.719969] ? __pfx_mmap_region+0x10/0x10 [ 30.720494] ? security_mmap_addr+0x7d/0xa0 [ 30.721021] ? get_unmapped_area+0x1f5/0x3f0 [ 30.721573] do_mmap+0x854/0xf00 [ 30.722018] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.722517] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.723108] ksys_mmap_pgoff+0x3af/0x500 [ 30.723623] do_syscall_64+0x3f/0x90 [ 30.724109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.724760] RIP: 0033:0x7f7a3187ad82 [ 30.725224] 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 [ 30.727391] RSP: 002b:00007fff0679dc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.728302] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a3187ad82 [ 30.729142] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a30cb4000 [ 30.729986] RBP: 00007f7a30cb4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.730856] R10: 0000000000000812 R11: 0000000000000206 R12: 00005648dfc93f60 [ 30.731706] R13: 00007fff0679dca0 R14: 00007fff0679dcd0 R15: 00007fff0679e030 [ 30.732564] [ 30.732854] [ 30.733075] Allocated by task 212: [ 30.733501] kasan_save_stack+0x22/0x50 [ 30.734009] kasan_set_track+0x25/0x30 [ 30.734505] __kasan_slab_alloc+0x59/0x70 [ 30.735035] kmem_cache_alloc+0x16b/0x370 [ 30.735557] vm_area_dup+0x20/0x160 [ 30.736021] __split_vma+0x170/0x950 [ 30.736487] split_vma+0xc6/0x110 [ 30.736933] mprotect_fixup+0x8d2/0xb30 [ 30.737440] do_mprotect_pkey+0x87e/0xd40 [ 30.737979] __x64_sys_mprotect+0x78/0xc0 [ 30.738501] do_syscall_64+0x3f/0x90 [ 30.739000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739642] [ 30.739863] Freed by task 212: [ 30.740251] kasan_save_stack+0x22/0x50 [ 30.740752] kasan_set_track+0x25/0x30 [ 30.741273] kasan_save_free_info+0x2b/0x50 [ 30.741806] __kasan_slab_free+0x10a/0x190 [ 30.742339] kmem_cache_free+0x10d/0x4d0 [ 30.742926] rcu_core+0x8c8/0x2860 [ 30.743377] __do_softirq+0x1b7/0x7d4 [ 30.743856] [ 30.744075] Last potentially related work creation: [ 30.744662] kasan_save_stack+0x22/0x50 [ 30.745166] __kasan_record_aux_stack+0x8e/0xa0 [ 30.745740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.746377] remove_vma+0x139/0x170 [ 30.746852] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.747406] do_vmi_munmap+0x1f1/0x2b0 [ 30.747896] __vm_munmap+0x138/0x3a0 [ 30.748362] __x64_sys_munmap+0x59/0x80 [ 30.748860] do_syscall_64+0x3f/0x90 [ 30.749342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.749983] [ 30.750196] The buggy address belongs to the object at ffff888014766d98 [ 30.750196] which belongs to the cache vm_area_struct of size 168 [ 30.751674] The buggy address is located 88 bytes inside of [ 30.751674] freed 168-byte region [ffff888014766d98, ffff888014766e40) [ 30.753078] [ 30.753295] The buggy address belongs to the physical page: [ 30.753953] page:00000000aa4ff7ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14766 [ 30.755058] memcg:ffff88800970e901 [ 30.755492] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.756142] page_type: 0xffffffff() [ 30.756598] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.757515] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800970e901 [ 30.758420] page dumped because: kasan: bad access detected [ 30.759095] [ 30.759310] Memory state around the buggy address: [ 30.759901] ffff888014766c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.760778] ffff888014766d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.761659] >ffff888014766d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.762518] ^ [ 30.763352] ffff888014766e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.764218] ffff888014766e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.765071] ================================================================== [ 30.766002] Disabling lock debugging due to kernel taint [ 32.717500] BUG: Bad rss-counter state mm:00000000cfb21dfc type:MM_FILEPAGES val:33 [ 32.718432] BUG: Bad rss-counter state mm:00000000cfb21dfc type:MM_ANONPAGES val:22 [ 33.213647] BUG: Bad rss-counter state mm:00000000af8148be type:MM_FILEPAGES val:33 [ 33.214691] BUG: Bad rss-counter state mm:00000000af8148be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55216' (ECDSA) to the list of known hosts. 2023/06/20 11:38:18 fuzzer started 2023/06/20 11:38:18 dialing manager at localhost:36067 2023/06/20 11:38:18 checking machine... 2023/06/20 11:38:18 checking revisions... [ 33.936164] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:38:18 testing simple program... [ 33.986993] cgroup: Unknown subsys name 'net' [ 34.049147] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:38:17 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=ffff88800ebf9080 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=00007ffd2efb5bc8 CR3=0000000016ff2000 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=2037313a38333a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a38333a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888016007a00 RSI=ffff888016007d20 RDI=ffff888016007a00 RBP=ffff888016007a98 RSP=ffff8880160079f0 R8 =0000000000000001 R9 =ffff888016007a40 R10=0000000000038001 R11=000000000008ad19 R12=ffff888016007ac8 R13=0000000000000000 R14=ffff88801613b680 R15=ffff888018c35390 RIP=ffffffff81130352 RFL=00000202 [-------] 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 00007f653642e900 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=00007f65369e60b0 CR3=0000000016326000 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