syzkaller login: [ 38.943579] BUG: Bad rss-counter state mm:000000002d6d1690 type:MM_FILEPAGES val:33 [ 38.944771] BUG: Bad rss-counter state mm:000000002d6d1690 type:MM_ANONPAGES val:22 [ 39.026547] ================================================================== [ 39.027545] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.028558] Read of size 8 at addr ffff88800f712140 by task sshd/218 [ 39.029504] [ 39.029786] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.030702] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.031827] Call Trace: [ 39.032187] [ 39.032500] dump_stack_lvl+0x91/0xf0 [ 39.033045] print_report+0xcc/0x620 [ 39.033592] ? __virt_addr_valid+0x102/0x340 [ 39.034203] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.034888] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.035618] kasan_report+0xbe/0xf0 [ 39.036150] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.036837] vma_interval_tree_remove+0xc75/0xec0 [ 39.037504] vma_prepare+0xc54/0x11a0 [ 39.038046] __split_vma+0x5af/0x950 [ 39.038565] ? __pfx___split_vma+0x10/0x10 [ 39.039153] ? find_held_lock+0x2c/0x110 [ 39.039724] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.040350] ? lock_is_held_type+0x9f/0x120 [ 39.040944] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.041633] ? mtree_range_walk+0x632/0x900 [ 39.042244] ? mas_walk+0x5c7/0x7c0 [ 39.042766] do_vmi_munmap+0x1f1/0x2b0 [ 39.043309] mmap_region+0x1f9/0x2660 [ 39.043846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.044407] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.045193] ? __pfx_lock_acquire+0x10/0x10 [ 39.045814] ? __pfx_mmap_region+0x10/0x10 [ 39.046399] ? security_mmap_addr+0x7d/0xa0 [ 39.046983] ? get_unmapped_area+0x1f5/0x3f0 [ 39.047588] do_mmap+0x854/0xf00 [ 39.048070] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.048612] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.049238] ksys_mmap_pgoff+0x3af/0x500 [ 39.049809] do_syscall_64+0x3f/0x90 [ 39.050337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.051045] RIP: 0033:0x7f88034b3d82 [ 39.051551] 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 [ 39.053930] RSP: 002b:00007fff1e4ebbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.054928] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88034b3d82 [ 39.055862] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88028ed000 [ 39.056797] RBP: 00007f88028ed000 R08: 0000000000000009 R09: 0000000000001000 [ 39.057734] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d259ca1ec0 [ 39.058640] R13: 00007fff1e4ebbf0 R14: 00007fff1e4ebc20 R15: 00007fff1e4ebf80 [ 39.059550] [ 39.059859] [ 39.060092] Allocated by task 211: [ 39.060541] kasan_save_stack+0x22/0x50 [ 39.061072] kasan_set_track+0x25/0x30 [ 39.061603] __kasan_slab_alloc+0x59/0x70 [ 39.062151] kmem_cache_alloc+0x16b/0x370 [ 39.062681] vm_area_dup+0x20/0x160 [ 39.063156] __split_vma+0x170/0x950 [ 39.063651] split_vma+0xc6/0x110 [ 39.064101] mprotect_fixup+0x8d2/0xb30 [ 39.064618] do_mprotect_pkey+0x87e/0xd40 [ 39.065164] __x64_sys_mprotect+0x78/0xc0 [ 39.065742] do_syscall_64+0x3f/0x90 [ 39.066241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.066925] [ 39.067154] Freed by task 211: [ 39.067576] kasan_save_stack+0x22/0x50 [ 39.068121] kasan_set_track+0x25/0x30 [ 39.068653] kasan_save_free_info+0x2b/0x50 [ 39.069201] __kasan_slab_free+0x10a/0x190 [ 39.069768] kmem_cache_free+0x10d/0x4d0 [ 39.070299] rcu_core+0x8c8/0x2860 [ 39.070774] __do_softirq+0x1b7/0x7d4 [ 39.071275] [ 39.071508] Last potentially related work creation: [ 39.072128] kasan_save_stack+0x22/0x50 [ 39.072656] __kasan_record_aux_stack+0x8e/0xa0 [ 39.073263] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.073956] remove_vma+0x139/0x170 [ 39.074433] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.075023] do_vmi_munmap+0x1f1/0x2b0 [ 39.075534] __vm_munmap+0x138/0x3a0 [ 39.076024] __x64_sys_munmap+0x59/0x80 [ 39.076547] do_syscall_64+0x3f/0x90 [ 39.077051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.077733] [ 39.077961] The buggy address belongs to the object at ffff88800f7120e8 [ 39.077961] which belongs to the cache vm_area_struct of size 168 [ 39.079516] The buggy address is located 88 bytes inside of [ 39.079516] freed 168-byte region [ffff88800f7120e8, ffff88800f712190) [ 39.081009] [ 39.081237] The buggy address belongs to the physical page: [ 39.081948] page:00000000450ea5a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf712 [ 39.083103] memcg:ffff888019ee0e01 [ 39.083561] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.084248] page_type: 0xffffffff() [ 39.084723] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.085710] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ee0e01 [ 39.086669] page dumped because: kasan: bad access detected [ 39.087379] [ 39.087599] Memory state around the buggy address: [ 39.088213] ffff88800f712000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.089124] ffff88800f712080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.090039] >ffff88800f712100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.090940] ^ [ 39.091619] ffff88800f712180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.092527] ffff88800f712200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.093433] ================================================================== [ 39.094706] Disabling lock debugging due to kernel taint [ 41.409758] BUG: Bad rss-counter state mm:0000000026d7057e type:MM_FILEPAGES val:33 [ 41.410948] BUG: Bad rss-counter state mm:0000000026d7057e type:MM_ANONPAGES val:22 [ 41.911113] BUG: Bad rss-counter state mm:0000000008199983 type:MM_FILEPAGES val:33 [ 41.912091] BUG: Bad rss-counter state mm:0000000008199983 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13215' (ECDSA) to the list of known hosts. 2023/06/20 08:13:29 fuzzer started 2023/06/20 08:13:29 dialing manager at localhost:44161 2023/06/20 08:13:29 checking machine... 2023/06/20 08:13:29 checking revisions... [ 42.666961] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:13:29 testing simple program... [ 42.724287] cgroup: Unknown subsys name 'net' [ 42.769659] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:13:14 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=0000000000000004 RCX=0000000000000000 RDX=000000000001c062 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=000000000001c062 RSP=ffff88806ce09da8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=ffff88806ce09ff8 R12=000000000001c062 R13=ffff88800f2d0180 R14=ffff88800f2d44c8 R15=ffff88800f2d0008 RIP=ffffffff821927de RFL=00000046 [---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 00007f54dcbee900 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=00007f54dd1a3650 CR3=000000000e1ea000 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=00000000000000e0 RBX=00000000000000e0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff88800f2d01a0 RSP=ffff88800f3d77a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffff88800f2d0050 R14=ffff88800f2d0048 R15=ffff88800f2d0060 RIP=ffffffff821927de RFL=00000093 [--S-A-C] 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 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=00007f54d95a3010 CR3=0000000016708000 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=2039323a33313a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a33313a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000