syzkaller login: [ 31.737757] BUG: Bad rss-counter state mm:000000008bcccdb1 type:MM_FILEPAGES val:33 [ 31.739232] BUG: Bad rss-counter state mm:000000008bcccdb1 type:MM_ANONPAGES val:22 [ 31.862969] ================================================================== [ 31.864053] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.865239] Read of size 8 at addr ffff88800df0edf0 by task sshd/220 [ 31.866332] [ 31.866589] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.867613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.868918] Call Trace: [ 31.869332] [ 31.869720] dump_stack_lvl+0x91/0xf0 [ 31.870391] print_report+0xcc/0x620 [ 31.871049] ? __virt_addr_valid+0x102/0x340 [ 31.871801] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.872652] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.873514] kasan_report+0xbe/0xf0 [ 31.874166] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.875022] vma_interval_tree_remove+0xc75/0xec0 [ 31.875852] vma_prepare+0xc54/0x11a0 [ 31.876511] __split_vma+0x5af/0x950 [ 31.877197] ? __pfx___split_vma+0x10/0x10 [ 31.877851] ? find_held_lock+0x2c/0x110 [ 31.878475] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.879159] ? lock_is_held_type+0x9f/0x120 [ 31.879817] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.880549] ? mtree_range_walk+0x632/0x900 [ 31.881227] ? mas_walk+0x5c7/0x7c0 [ 31.881797] do_vmi_munmap+0x1f1/0x2b0 [ 31.882387] mmap_region+0x1f9/0x2660 [ 31.882965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.883580] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.884438] ? __pfx_lock_acquire+0x10/0x10 [ 31.885113] ? __pfx_mmap_region+0x10/0x10 [ 31.885754] ? security_mmap_addr+0x7d/0xa0 [ 31.886392] ? get_unmapped_area+0x1f5/0x3f0 [ 31.887067] do_mmap+0x854/0xf00 [ 31.887603] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.888198] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.888881] ksys_mmap_pgoff+0x3af/0x500 [ 31.889469] do_syscall_64+0x3f/0x90 [ 31.889946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.890592] RIP: 0033:0x7fac27806d82 [ 31.891049] 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 [ 31.893176] RSP: 002b:00007ffcef0031e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.894086] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac27806d82 [ 31.894940] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac26c40000 [ 31.895803] RBP: 00007fac26c40000 R08: 0000000000000009 R09: 0000000000001000 [ 31.896675] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d557deec0 [ 31.897559] R13: 00007ffcef003200 R14: 00007ffcef003230 R15: 00007ffcef003590 [ 31.898434] [ 31.898734] [ 31.898956] Allocated by task 213: [ 31.899391] kasan_save_stack+0x22/0x50 [ 31.899906] kasan_set_track+0x25/0x30 [ 31.900412] __kasan_slab_alloc+0x59/0x70 [ 31.900951] kmem_cache_alloc+0x16b/0x370 [ 31.901496] vm_area_dup+0x20/0x160 [ 31.901967] __split_vma+0x170/0x950 [ 31.902459] split_vma+0xc6/0x110 [ 31.902928] mprotect_fixup+0x8d2/0xb30 [ 31.903454] do_mprotect_pkey+0x87e/0xd40 [ 31.903995] __x64_sys_mprotect+0x78/0xc0 [ 31.904540] do_syscall_64+0x3f/0x90 [ 31.905045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.905752] [ 31.905978] Freed by task 213: [ 31.906393] kasan_save_stack+0x22/0x50 [ 31.906998] kasan_set_track+0x25/0x30 [ 31.907517] kasan_save_free_info+0x2b/0x50 [ 31.908075] __kasan_slab_free+0x10a/0x190 [ 31.908640] kmem_cache_free+0x10d/0x4d0 [ 31.909183] rcu_core+0x8c8/0x2860 [ 31.909650] __do_softirq+0x1b7/0x7d4 [ 31.910149] [ 31.910379] Last potentially related work creation: [ 31.911001] kasan_save_stack+0x22/0x50 [ 31.911531] __kasan_record_aux_stack+0x8e/0xa0 [ 31.912148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.912838] remove_vma+0x139/0x170 [ 31.913330] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.913928] do_vmi_munmap+0x1f1/0x2b0 [ 31.914450] __vm_munmap+0x138/0x3a0 [ 31.914958] __x64_sys_munmap+0x59/0x80 [ 31.915487] do_syscall_64+0x3f/0x90 [ 31.916000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.916692] [ 31.916924] The buggy address belongs to the object at ffff88800df0ed98 [ 31.916924] which belongs to the cache vm_area_struct of size 168 [ 31.918539] The buggy address is located 88 bytes inside of [ 31.918539] freed 168-byte region [ffff88800df0ed98, ffff88800df0ee40) [ 31.920072] [ 31.920307] The buggy address belongs to the physical page: [ 31.921024] page:00000000ad896f6e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf0e [ 31.922234] memcg:ffff88800e018f01 [ 31.922703] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.923414] page_type: 0xffffffff() [ 31.923913] raw: 0100000000000200 ffff8880087a0c80 ffffea0000315780 dead000000000004 [ 31.924925] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e018f01 [ 31.925949] page dumped because: kasan: bad access detected [ 31.926682] [ 31.926916] Memory state around the buggy address: [ 31.927550] ffff88800df0ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.928504] ffff88800df0ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.929468] >ffff88800df0ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.930418] ^ [ 31.931320] ffff88800df0ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.932274] ffff88800df0ee80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.933256] ================================================================== [ 31.934355] Disabling lock debugging due to kernel taint [ 33.776509] BUG: Bad rss-counter state mm:00000000fe756653 type:MM_FILEPAGES val:33 [ 33.777768] BUG: Bad rss-counter state mm:00000000fe756653 type:MM_ANONPAGES val:22 [ 34.144589] BUG: Bad rss-counter state mm:00000000884a996d type:MM_FILEPAGES val:33 [ 34.145757] BUG: Bad rss-counter state mm:00000000884a996d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35691' (ECDSA) to the list of known hosts. 2023/06/21 05:34:32 fuzzer started 2023/06/21 05:34:32 dialing manager at localhost:36067 2023/06/21 05:34:32 checking machine... 2023/06/21 05:34:32 checking revisions... [ 34.844236] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:34:32 testing simple program... [ 34.882708] cgroup: Unknown subsys name 'net' [ 34.920455] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:34:32 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9c13b6 RSP=ffff88806ce09da0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff8560b520 R13=ffffffff813782e4 R14=ffff88806ce35000 R15=ffff88800ec94780 RIP=ffffffff812d86f2 RFL=00000247 [---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 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=00007fd1d423cfc0 CR3=000000000e4c2000 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=2031333a34333a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a34333a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008f7a778 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81808b88 RDI=ffffffff8560b640 RBP=ffff888015da7d10 RSP=ffff888015da7c90 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880087b8500 R13=ffff88800ea08c00 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff812d8664 RFL=00000293 [--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 00007fcfb0ea0900 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=00007ffdbc731000 CR3=000000001a086000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000