syzkaller login: [ 38.775805] BUG: Bad rss-counter state mm:000000003e9f3dcd type:MM_FILEPAGES val:33 [ 38.777007] BUG: Bad rss-counter state mm:000000003e9f3dcd type:MM_ANONPAGES val:22 [ 38.934038] ================================================================== [ 38.935011] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.935966] Read of size 8 at addr ffff888016e0b058 by task sshd/224 [ 38.936749] [ 38.937059] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.938019] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.939023] Call Trace: [ 38.939367] [ 38.939652] dump_stack_lvl+0x91/0xf0 [ 38.940150] print_report+0xcc/0x620 [ 38.940652] ? __virt_addr_valid+0x102/0x340 [ 38.941237] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.941869] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.942499] kasan_report+0xbe/0xf0 [ 38.942995] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.943630] vma_interval_tree_remove+0xc75/0xec0 [ 38.944244] vma_prepare+0xc54/0x11a0 [ 38.944737] __split_vma+0x5af/0x950 [ 38.945209] ? __pfx___split_vma+0x10/0x10 [ 38.945740] ? find_held_lock+0x2c/0x110 [ 38.946270] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.946856] ? lock_is_held_type+0x9f/0x120 [ 38.947406] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.948024] ? mtree_range_walk+0x632/0x900 [ 38.948588] ? mas_walk+0x5c7/0x7c0 [ 38.949063] do_vmi_munmap+0x1f1/0x2b0 [ 38.949569] mmap_region+0x1f9/0x2660 [ 38.950055] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.950574] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.951309] ? __pfx_lock_acquire+0x10/0x10 [ 38.951853] ? __pfx_mmap_region+0x10/0x10 [ 38.952385] ? security_mmap_addr+0x7d/0xa0 [ 38.952917] ? get_unmapped_area+0x1f5/0x3f0 [ 38.953478] do_mmap+0x854/0xf00 [ 38.953923] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.954420] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.955001] ksys_mmap_pgoff+0x3af/0x500 [ 38.955518] do_syscall_64+0x3f/0x90 [ 38.956003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.956660] RIP: 0033:0x7f6eb95b6d82 [ 38.957116] 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 [ 38.959263] RSP: 002b:00007ffe1307eb48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.960172] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6eb95b6d82 [ 38.961041] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6eb89f0000 [ 38.961893] RBP: 00007f6eb89f0000 R08: 0000000000000009 R09: 0000000000001000 [ 38.962768] R10: 0000000000000812 R11: 0000000000000206 R12: 00005648fdf7bec0 [ 38.963617] R13: 00007ffe1307eb60 R14: 00007ffe1307eb90 R15: 00007ffe1307eef0 [ 38.964482] [ 38.964781] [ 38.964999] Allocated by task 217: [ 38.965439] kasan_save_stack+0x22/0x50 [ 38.965958] kasan_set_track+0x25/0x30 [ 38.966455] __kasan_slab_alloc+0x59/0x70 [ 38.966993] kmem_cache_alloc+0x16b/0x370 [ 38.967525] vm_area_dup+0x20/0x160 [ 38.967987] __split_vma+0x170/0x950 [ 38.968460] split_vma+0xc6/0x110 [ 38.968913] mprotect_fixup+0x8d2/0xb30 [ 38.969414] do_mprotect_pkey+0x87e/0xd40 [ 38.969941] __x64_sys_mprotect+0x78/0xc0 [ 38.970471] do_syscall_64+0x3f/0x90 [ 38.970977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.971621] [ 38.971839] Freed by task 19: [ 38.972232] kasan_save_stack+0x22/0x50 [ 38.972754] kasan_set_track+0x25/0x30 [ 38.973259] kasan_save_free_info+0x2b/0x50 [ 38.973805] __kasan_slab_free+0x10a/0x190 [ 38.974361] kmem_cache_free+0x10d/0x4d0 [ 38.974884] rcu_core+0x8c8/0x2860 [ 38.975335] __do_softirq+0x1b7/0x7d4 [ 38.975815] [ 38.976029] Last potentially related work creation: [ 38.976624] kasan_save_stack+0x22/0x50 [ 38.977136] __kasan_record_aux_stack+0x8e/0xa0 [ 38.977718] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.978450] remove_vma+0x139/0x170 [ 38.978932] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.979503] do_vmi_munmap+0x1f1/0x2b0 [ 38.979992] __vm_munmap+0x138/0x3a0 [ 38.980459] __x64_sys_munmap+0x59/0x80 [ 38.980954] do_syscall_64+0x3f/0x90 [ 38.981441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.982093] [ 38.982310] The buggy address belongs to the object at ffff888016e0b000 [ 38.982310] which belongs to the cache vm_area_struct of size 168 [ 38.983792] The buggy address is located 88 bytes inside of [ 38.983792] freed 168-byte region [ffff888016e0b000, ffff888016e0b0a8) [ 38.985203] [ 38.985418] The buggy address belongs to the physical page: [ 38.986106] page:00000000a40f8957 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e0b [ 38.987229] memcg:ffff888015bdc201 [ 38.987665] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.988309] page_type: 0xffffffff() [ 38.988775] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.989710] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015bdc201 [ 38.990614] page dumped because: kasan: bad access detected [ 38.991300] [ 38.991522] Memory state around the buggy address: [ 38.992110] ffff888016e0af00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 38.992982] ffff888016e0af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.993848] >ffff888016e0b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.994708] ^ [ 38.995446] ffff888016e0b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.996311] ffff888016e0b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.997163] ================================================================== [ 38.998096] Disabling lock debugging due to kernel taint [ 40.515441] BUG: Bad rss-counter state mm:00000000a89327f0 type:MM_FILEPAGES val:31 [ 40.515951] BUG: Bad rss-counter state mm:00000000a89327f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45729' (ECDSA) to the list of known hosts. [ 41.005784] BUG: Bad rss-counter state mm:000000002c811cc6 type:MM_FILEPAGES val:33 [ 41.007192] BUG: Bad rss-counter state mm:000000002c811cc6 type:MM_ANONPAGES val:22 2023/06/20 11:17:56 fuzzer started 2023/06/20 11:17:56 dialing manager at localhost:36067 2023/06/20 11:17:56 checking machine... 2023/06/20 11:17:56 checking revisions... [ 41.535948] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:17:56 testing simple program... [ 41.583371] cgroup: Unknown subsys name 'net' [ 41.616300] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:17:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888010387a78 RCX=0000000000000001 RDX=1ffff11002070f5f RSI=ffffffff81370a8a RDI=ffff888010387a84 RBP=ffff888010387af8 RSP=ffff888010387990 R8 =0000000000000001 R9 =ffff8880103879f0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff888010387a78 R13=0000000000000000 R14=ffff88800948b680 R15=dffffc0000000000 RIP=ffffffff813ad547 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 00007fdef24d9900 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=00007fdef2a8e650 CR3=000000000fc7c000 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=dffffc0000000000 RBX=ffffffff818c8501 RCX=0000000000000001 RDX=1ffff11002dc4e64 RSI=ffff888016e276b0 RDI=ffffffff818c8501 RBP=ffffffff818c8501 RSP=ffff888016e27270 R8 =0000000000000001 R9 =ffff888016e27308 R10=0000000000038001 R11=0000000000020c5e R12=ffff888016e27390 R13=0000000000000000 R14=ffff888010258000 R15=0000000000000cc0 RIP=ffffffff811fc6f7 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 00007f8845e45900 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=00007f88452984e0 CR3=000000000eb82000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=75038273bacc84a500000000000ae988 XMM05=4e76e4878c380ac00000000000132ca8 XMM06=993088549562ad030000000000131728 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000