syzkaller login: [ 28.787412] BUG: Bad rss-counter state mm:00000000bd29a2bf type:MM_FILEPAGES val:33 [ 28.788420] BUG: Bad rss-counter state mm:00000000bd29a2bf type:MM_ANONPAGES val:22 [ 28.959302] ================================================================== [ 28.960272] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.961255] Read of size 8 at addr ffff88800d7e2a50 by task sshd/219 [ 28.962070] [ 28.962400] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.963312] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.964332] Call Trace: [ 28.964698] [ 28.964998] dump_stack_lvl+0x91/0xf0 [ 28.965517] print_report+0xcc/0x620 [ 28.966043] ? __virt_addr_valid+0x102/0x340 [ 28.966626] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.967277] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.967932] kasan_report+0xbe/0xf0 [ 28.968435] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.969084] vma_interval_tree_remove+0xc75/0xec0 [ 28.969727] vma_prepare+0xc54/0x11a0 [ 28.970247] __split_vma+0x5af/0x950 [ 28.970749] ? __pfx___split_vma+0x10/0x10 [ 28.971315] ? find_held_lock+0x2c/0x110 [ 28.971868] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.972481] ? lock_is_held_type+0x9f/0x120 [ 28.973056] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.973708] ? mtree_range_walk+0x632/0x900 [ 28.974313] ? mas_walk+0x5c7/0x7c0 [ 28.974816] do_vmi_munmap+0x1f1/0x2b0 [ 28.975340] mmap_region+0x1f9/0x2660 [ 28.975851] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.976396] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.977154] ? __pfx_lock_acquire+0x10/0x10 [ 28.977721] ? __pfx_mmap_region+0x10/0x10 [ 28.978291] ? security_mmap_addr+0x7d/0xa0 [ 28.978856] ? get_unmapped_area+0x1f5/0x3f0 [ 28.979441] do_mmap+0x854/0xf00 [ 28.979906] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.980438] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.981039] ksys_mmap_pgoff+0x3af/0x500 [ 28.981582] do_syscall_64+0x3f/0x90 [ 28.982104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.982789] RIP: 0033:0x7f7bd159ed82 [ 28.983280] 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 [ 28.985534] RSP: 002b:00007ffd10591e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.986503] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7bd159ed82 [ 28.987405] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7bd09d8000 [ 28.988306] RBP: 00007f7bd09d8000 R08: 0000000000000009 R09: 0000000000001000 [ 28.989206] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555646974ec0 [ 28.990114] R13: 00007ffd10591e70 R14: 00007ffd10591ea0 R15: 00007ffd10592200 [ 28.991037] [ 28.991346] [ 28.991576] Allocated by task 212: [ 28.992034] kasan_save_stack+0x22/0x50 [ 28.992572] kasan_set_track+0x25/0x30 [ 28.993094] __kasan_slab_alloc+0x59/0x70 [ 28.993647] kmem_cache_alloc+0x16b/0x370 [ 28.994205] vm_area_dup+0x20/0x160 [ 28.994687] __split_vma+0x170/0x950 [ 28.995184] split_vma+0xc6/0x110 [ 28.995651] mprotect_fixup+0x8d2/0xb30 [ 28.996182] do_mprotect_pkey+0x87e/0xd40 [ 28.996737] __x64_sys_mprotect+0x78/0xc0 [ 28.997292] do_syscall_64+0x3f/0x90 [ 28.997799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.998489] [ 28.998718] Freed by task 212: [ 28.999140] kasan_save_stack+0x22/0x50 [ 28.999680] kasan_set_track+0x25/0x30 [ 29.000204] kasan_save_free_info+0x2b/0x50 [ 29.000769] __kasan_slab_free+0x10a/0x190 [ 29.001336] kmem_cache_free+0x10d/0x4d0 [ 29.001894] rcu_core+0x8c8/0x2860 [ 29.002370] __do_softirq+0x1b7/0x7d4 [ 29.002873] [ 29.003102] Last potentially related work creation: [ 29.003722] kasan_save_stack+0x22/0x50 [ 29.004260] __kasan_record_aux_stack+0x8e/0xa0 [ 29.004870] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.005561] remove_vma+0x139/0x170 [ 29.006046] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.006641] do_vmi_munmap+0x1f1/0x2b0 [ 29.007155] __vm_munmap+0x138/0x3a0 [ 29.007650] __x64_sys_munmap+0x59/0x80 [ 29.008176] do_syscall_64+0x3f/0x90 [ 29.008674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.009353] [ 29.009582] Second to last potentially related work creation: [ 29.010317] kasan_save_stack+0x22/0x50 [ 29.010852] __kasan_record_aux_stack+0x8e/0xa0 [ 29.011465] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.012146] remove_vma+0x139/0x170 [ 29.012629] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.013222] do_vmi_munmap+0x1f1/0x2b0 [ 29.013738] mmap_region+0x1f9/0x2660 [ 29.014278] do_mmap+0x854/0xf00 [ 29.014739] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.015257] ksys_mmap_pgoff+0x3af/0x500 [ 29.015794] do_syscall_64+0x3f/0x90 [ 29.016297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.016978] [ 29.017208] The buggy address belongs to the object at ffff88800d7e29f8 [ 29.017208] which belongs to the cache vm_area_struct of size 168 [ 29.018781] The buggy address is located 88 bytes inside of [ 29.018781] freed 168-byte region [ffff88800d7e29f8, ffff88800d7e2aa0) [ 29.020279] [ 29.020513] The buggy address belongs to the physical page: [ 29.021215] page:000000003d241f64 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7e2 [ 29.022384] memcg:ffff88800dd74201 [ 29.022845] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.023538] page_type: 0xffffffff() [ 29.024022] raw: 0100000000000200 ffff88800879fc80 ffffea000038e1c0 dead000000000006 [ 29.024999] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd74201 [ 29.025974] page dumped because: kasan: bad access detected [ 29.026681] [ 29.026911] Memory state around the buggy address: [ 29.027548] ffff88800d7e2900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.028455] ffff88800d7e2980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 29.029354] >ffff88800d7e2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.030256] ^ [ 29.030997] ffff88800d7e2a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 29.031901] ffff88800d7e2b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.032808] ================================================================== [ 29.033864] Disabling lock debugging due to kernel taint [ 30.825970] BUG: Bad rss-counter state mm:000000006f18f29e type:MM_FILEPAGES val:33 [ 30.827062] BUG: Bad rss-counter state mm:000000006f18f29e type:MM_ANONPAGES val:22 [ 31.234299] BUG: Bad rss-counter state mm:00000000dd1ba97a type:MM_FILEPAGES val:33 [ 31.235509] BUG: Bad rss-counter state mm:00000000dd1ba97a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10927' (ECDSA) to the list of known hosts. 2023/06/20 03:38:11 fuzzer started 2023/06/20 03:38:11 dialing manager at localhost:44161 2023/06/20 03:38:11 checking machine... 2023/06/20 03:38:11 checking revisions... [ 31.899766] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:38:11 testing simple program... [ 31.959125] cgroup: Unknown subsys name 'net' [ 32.025421] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:38:11 Registers: info registers vcpu 0 RAX=fffff940000da9c8 RBX=fffff940000da9c9 RCX=ffffffff8162e143 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffea00006d4e40 RBP=fffff940000da9c8 RSP=ffff88800ea179d0 R8 =0000000000000000 R9 =fffff940000da9c8 R10=ffffea00006d4e47 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=ffff88800ea17c00 R15=ffffea00006d4e40 RIP=ffffffff8180ef28 RFL=00000283 [--S---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 00007f6281c32900 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=00007ffeffef7000 CR3=000000000d3d4000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=000000ff000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=706d6f63206d687469726f676c612023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ff513b82ab0 CR3=000000000ef32000 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=2031313a38333a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a38333a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000