syzkaller login: [ 30.839032] BUG: Bad rss-counter state mm:0000000010006d51 type:MM_FILEPAGES val:33 [ 30.840694] BUG: Bad rss-counter state mm:0000000010006d51 type:MM_ANONPAGES val:22 [ 31.009881] ================================================================== [ 31.011061] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.012313] Read of size 8 at addr ffff88800d2f14e0 by task sshd/220 [ 31.013388] [ 31.013614] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.014528] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.015541] Call Trace: [ 31.015875] <TASK> [ 31.016179] dump_stack_lvl+0x91/0xf0 [ 31.016695] print_report+0xcc/0x620 [ 31.017207] ? __virt_addr_valid+0x102/0x340 [ 31.017792] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.018436] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.019079] kasan_report+0xbe/0xf0 [ 31.019560] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.020191] vma_interval_tree_remove+0xc75/0xec0 [ 31.020812] vma_prepare+0xc54/0x11a0 [ 31.021312] __split_vma+0x5af/0x950 [ 31.021827] ? __pfx___split_vma+0x10/0x10 [ 31.022384] ? find_held_lock+0x2c/0x110 [ 31.022926] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.023517] ? lock_is_held_type+0x9f/0x120 [ 31.024078] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.024705] ? mtree_range_walk+0x632/0x900 [ 31.025290] ? mas_walk+0x5c7/0x7c0 [ 31.025798] do_vmi_munmap+0x1f1/0x2b0 [ 31.026324] mmap_region+0x1f9/0x2660 [ 31.026827] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.027369] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.028118] ? __pfx_lock_acquire+0x10/0x10 [ 31.028647] ? __pfx_mmap_region+0x10/0x10 [ 31.029180] ? security_mmap_addr+0x7d/0xa0 [ 31.029752] ? get_unmapped_area+0x1f5/0x3f0 [ 31.030330] do_mmap+0x854/0xf00 [ 31.030784] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.031304] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.031875] ksys_mmap_pgoff+0x3af/0x500 [ 31.032377] do_syscall_64+0x3f/0x90 [ 31.032857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.033501] RIP: 0033:0x7f87d305bd82 [ 31.033969] 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 [ 31.036143] RSP: 002b:00007ffc206f4408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.037070] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87d305bd82 [ 31.037958] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87d2495000 [ 31.038836] RBP: 00007f87d2495000 R08: 0000000000000009 R09: 0000000000001000 [ 31.039713] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a87574ec0 [ 31.040591] R13: 00007ffc206f4420 R14: 00007ffc206f4450 R15: 00007ffc206f47b0 [ 31.041459] </TASK> [ 31.041754] [ 31.041970] Allocated by task 213: [ 31.042407] kasan_save_stack+0x22/0x50 [ 31.042918] kasan_set_track+0x25/0x30 [ 31.043430] __kasan_slab_alloc+0x59/0x70 [ 31.043958] kmem_cache_alloc+0x16b/0x370 [ 31.044476] vm_area_dup+0x20/0x160 [ 31.044923] __split_vma+0x170/0x950 [ 31.045391] split_vma+0xc6/0x110 [ 31.045870] mprotect_fixup+0x8d2/0xb30 [ 31.046390] do_mprotect_pkey+0x87e/0xd40 [ 31.046930] __x64_sys_mprotect+0x78/0xc0 [ 31.047489] do_syscall_64+0x3f/0x90 [ 31.047979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.048641] [ 31.048861] Freed by task 203: [ 31.049277] kasan_save_stack+0x22/0x50 [ 31.049806] kasan_set_track+0x25/0x30 [ 31.050319] kasan_save_free_info+0x2b/0x50 [ 31.050869] __kasan_slab_free+0x10a/0x190 [ 31.051422] kmem_cache_free+0x10d/0x4d0 [ 31.051949] rcu_core+0x8c8/0x2860 [ 31.052417] __do_softirq+0x1b7/0x7d4 [ 31.052916] [ 31.053139] Last potentially related work creation: [ 31.053849] kasan_save_stack+0x22/0x50 [ 31.054380] __kasan_record_aux_stack+0x8e/0xa0 [ 31.054988] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.055663] remove_vma+0x139/0x170 [ 31.056136] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.056722] do_vmi_munmap+0x1f1/0x2b0 [ 31.057235] __vm_munmap+0x138/0x3a0 [ 31.057731] __x64_sys_munmap+0x59/0x80 [ 31.058232] do_syscall_64+0x3f/0x90 [ 31.058700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.059344] [ 31.059558] Second to last potentially related work creation: [ 31.060235] kasan_save_stack+0x22/0x50 [ 31.060734] __kasan_record_aux_stack+0x8e/0xa0 [ 31.061302] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.061943] remove_vma+0x139/0x170 [ 31.062395] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.062949] do_vmi_munmap+0x1f1/0x2b0 [ 31.063439] mmap_region+0x1f9/0x2660 [ 31.063924] do_mmap+0x854/0xf00 [ 31.064356] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.064839] ksys_mmap_pgoff+0x3af/0x500 [ 31.065358] do_syscall_64+0x3f/0x90 [ 31.065872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.066559] [ 31.066785] The buggy address belongs to the object at ffff88800d2f1488 [ 31.066785] which belongs to the cache vm_area_struct of size 168 [ 31.068310] The buggy address is located 88 bytes inside of [ 31.068310] freed 168-byte region [ffff88800d2f1488, ffff88800d2f1530) [ 31.069724] [ 31.069944] The buggy address belongs to the physical page: [ 31.070595] page:00000000986e40a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd2f1 [ 31.071675] memcg:ffff88800e9e9d01 [ 31.072104] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.072766] page_type: 0xffffffff() [ 31.073216] raw: 0100000000000200 ffff8880087a0c80 ffffea0000365600 dead000000000002 [ 31.074152] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9e9d01 [ 31.075051] page dumped because: kasan: bad access detected [ 31.075707] [ 31.075920] Memory state around the buggy address: [ 31.076501] ffff88800d2f1380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.077348] ffff88800d2f1400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.078206] >ffff88800d2f1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.079052] ^ [ 31.079803] ffff88800d2f1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.080661] ffff88800d2f1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.081514] ================================================================== [ 31.082535] Disabling lock debugging due to kernel taint [ 33.375386] BUG: Bad rss-counter state mm:00000000a669ff0b type:MM_FILEPAGES val:33 [ 33.376413] BUG: Bad rss-counter state mm:00000000a669ff0b type:MM_ANONPAGES val:22 [ 33.832224] BUG: Bad rss-counter state mm:00000000b4d8b2d4 type:MM_FILEPAGES val:33 [ 33.833231] BUG: Bad rss-counter state mm:00000000b4d8b2d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33611' (ECDSA) to the list of known hosts. 2023/06/20 13:34:36 fuzzer started 2023/06/20 13:34:36 dialing manager at localhost:36067 2023/06/20 13:34:36 checking machine... 2023/06/20 13:34:36 checking revisions... [ 34.555431] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:34:36 testing simple program... [ 34.610316] cgroup: Unknown subsys name 'net' [ 34.650780] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:34:36 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000402 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff85618098 RSP=ffff888008da7d10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000003 R12=0000000000000296 R13=0000000000000003 R14=ffff888008d91b40 R15=ffff888008da7dc0 RIP=ffffffff84535d1e RFL=00000082 [--S----] 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=00007f1d4b0a6930 CR3=000000000f644000 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=2035333a34333a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a34333a3331203032 XMM08=00000000000000000000005800000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800fd1b000 RBX=ffff88800941f068 RCX=1ffff11001a27744 RDX=dffffc0000000000 RSI=ffff88800fce05e8 RDI=ffff88800941f098 RBP=ffff88800d13b9f0 RSP=ffff88801ca8fa78 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800fce0500 R13=0000000000000000 R14=ffff88800e5c3638 R15=ffff88800e5c35f0 RIP=ffffffff81847688 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 00007f09eb2cc900 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=00007ffc46408000 CR3=000000000f61e000 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