syzkaller login: [ 30.881085] BUG: Bad rss-counter state mm:000000007f5725c1 type:MM_FILEPAGES val:33 [ 30.882414] BUG: Bad rss-counter state mm:000000007f5725c1 type:MM_ANONPAGES val:22 [ 31.049167] ================================================================== [ 31.049855] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.050522] Read of size 8 at addr ffff88800cd26228 by task sshd/219 [ 31.051013] [ 31.051157] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.051720] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.052398] Call Trace: [ 31.052611] [ 31.052799] dump_stack_lvl+0x91/0xf0 [ 31.053128] print_report+0xcc/0x620 [ 31.053582] ? __virt_addr_valid+0x102/0x340 [ 31.053944] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.054351] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.054756] kasan_report+0xbe/0xf0 [ 31.055072] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.055468] vma_interval_tree_remove+0xc75/0xec0 [ 31.055840] vma_prepare+0xc54/0x11a0 [ 31.056139] __split_vma+0x5af/0x950 [ 31.056426] ? __pfx___split_vma+0x10/0x10 [ 31.056758] ? find_held_lock+0x2c/0x110 [ 31.057102] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.057484] ? lock_is_held_type+0x9f/0x120 [ 31.057841] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.058239] ? mtree_range_walk+0x632/0x900 [ 31.058600] ? mas_walk+0x5c7/0x7c0 [ 31.058912] do_vmi_munmap+0x1f1/0x2b0 [ 31.059236] mmap_region+0x1f9/0x2660 [ 31.059555] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.059894] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.060364] ? __pfx_lock_acquire+0x10/0x10 [ 31.060712] ? __pfx_mmap_region+0x10/0x10 [ 31.061058] ? security_mmap_addr+0x7d/0xa0 [ 31.061431] ? get_unmapped_area+0x1f5/0x3f0 [ 31.061789] do_mmap+0x854/0xf00 [ 31.062077] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.062405] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.062774] ksys_mmap_pgoff+0x3af/0x500 [ 31.063110] do_syscall_64+0x3f/0x90 [ 31.063427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.063851] RIP: 0033:0x7f5f6fbbdd82 [ 31.064152] 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 [ 31.065529] RSP: 002b:00007ffe71fd6a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.066120] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f6fbbdd82 [ 31.066668] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f6eff7000 [ 31.067224] RBP: 00007f5f6eff7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.067773] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b047b2aec0 [ 31.068323] R13: 00007ffe71fd6a30 R14: 00007ffe71fd6a60 R15: 00007ffe71fd6dc0 [ 31.068885] [ 31.069080] [ 31.069226] Allocated by task 212: [ 31.069526] kasan_save_stack+0x22/0x50 [ 31.069858] kasan_set_track+0x25/0x30 [ 31.070184] __kasan_slab_alloc+0x59/0x70 [ 31.070527] kmem_cache_alloc+0x16b/0x370 [ 31.070865] vm_area_dup+0x20/0x160 [ 31.071172] __split_vma+0x170/0x950 [ 31.071481] split_vma+0xc6/0x110 [ 31.071767] mprotect_fixup+0x8d2/0xb30 [ 31.072100] do_mprotect_pkey+0x87e/0xd40 [ 31.072445] __x64_sys_mprotect+0x78/0xc0 [ 31.072788] do_syscall_64+0x3f/0x90 [ 31.073100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.073525] [ 31.073668] Freed by task 212: [ 31.073925] kasan_save_stack+0x22/0x50 [ 31.074257] kasan_set_track+0x25/0x30 [ 31.074581] kasan_save_free_info+0x2b/0x50 [ 31.074927] __kasan_slab_free+0x10a/0x190 [ 31.075278] kmem_cache_free+0x10d/0x4d0 [ 31.075613] rcu_core+0x8c8/0x2860 [ 31.075907] __do_softirq+0x1b7/0x7d4 [ 31.076227] [ 31.076373] Last potentially related work creation: [ 31.076751] kasan_save_stack+0x22/0x50 [ 31.077085] __kasan_record_aux_stack+0x8e/0xa0 [ 31.077468] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.077887] remove_vma+0x139/0x170 [ 31.078184] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.078551] do_vmi_munmap+0x1f1/0x2b0 [ 31.078867] __vm_munmap+0x138/0x3a0 [ 31.079174] __x64_sys_munmap+0x59/0x80 [ 31.079501] do_syscall_64+0x3f/0x90 [ 31.079810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.080231] [ 31.080374] Second to last potentially related work creation: [ 31.080815] kasan_save_stack+0x22/0x50 [ 31.081147] __kasan_record_aux_stack+0x8e/0xa0 [ 31.081538] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.081955] remove_vma+0x139/0x170 [ 31.082251] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.082617] do_vmi_munmap+0x1f1/0x2b0 [ 31.082933] mmap_region+0x1f9/0x2660 [ 31.083246] do_mmap+0x854/0xf00 [ 31.083531] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.083850] ksys_mmap_pgoff+0x3af/0x500 [ 31.084182] do_syscall_64+0x3f/0x90 [ 31.084494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.084917] [ 31.085059] The buggy address belongs to the object at ffff88800cd261d0 [ 31.085059] which belongs to the cache vm_area_struct of size 168 [ 31.086011] The buggy address is located 88 bytes inside of [ 31.086011] freed 168-byte region [ffff88800cd261d0, ffff88800cd26278) [ 31.086931] [ 31.087074] The buggy address belongs to the physical page: [ 31.087505] page:00000000b5b91128 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcd26 [ 31.088213] memcg:ffff8880099fea01 [ 31.088494] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.088911] page_type: 0xffffffff() [ 31.089209] raw: 0100000000000200 ffff8880087a0c80 ffffea0000383980 dead000000000002 [ 31.089826] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099fea01 [ 31.090412] page dumped because: kasan: bad access detected [ 31.090843] [ 31.090984] Memory state around the buggy address: [ 31.091363] ffff88800cd26100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.091921] ffff88800cd26180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.092482] >ffff88800cd26200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.093038] ^ [ 31.093405] ffff88800cd26280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.093965] ffff88800cd26300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.094523] ================================================================== [ 31.095209] Disabling lock debugging due to kernel taint [ 33.155597] BUG: Bad rss-counter state mm:00000000a9a16ca7 type:MM_FILEPAGES val:33 [ 33.156820] BUG: Bad rss-counter state mm:00000000a9a16ca7 type:MM_ANONPAGES val:22 [ 33.589120] BUG: Bad rss-counter state mm:00000000e0a4009e type:MM_FILEPAGES val:33 [ 33.589667] BUG: Bad rss-counter state mm:00000000e0a4009e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25746' (ECDSA) to the list of known hosts. 2023/06/21 10:32:55 fuzzer started 2023/06/21 10:32:55 dialing manager at localhost:36067 2023/06/21 10:32:55 checking machine... 2023/06/21 10:32:55 checking revisions... [ 34.262587] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:32:55 testing simple program... [ 34.318840] cgroup: Unknown subsys name 'net' [ 34.386349] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:32:54 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff86607000 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff88806ce09a18 R8 =0000000000000007 R9 =ffffffffff600000 R10=ffffffff86607000 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888019cfcc60 RIP=ffffffff814c0880 RFL=00000206 [-----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=00007f04ced575c0 CR3=000000000e450000 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=32333a3031203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343235 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864b2031 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888009487840 RSP=ffff888009487778 R8 =ffffffff864b2030 R9 =ffff888009487828 R10=0000000000038001 R11=00000000000b5080 R12=ffff888009487848 R13=ffff888009487830 R14=ffff888009487f58 R15=ffff8880094877e8 RIP=ffffffff8113113c 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 00007f53ba199900 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=00007ffd3e0a7000 CR3=000000000f134000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000