syzkaller login: [ 34.846945] BUG: Bad rss-counter state mm:00000000be7befd1 type:MM_FILEPAGES val:33 [ 34.847635] BUG: Bad rss-counter state mm:00000000be7befd1 type:MM_ANONPAGES val:22 [ 35.043907] ================================================================== [ 35.044507] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.045144] Read of size 8 at addr ffff888009464880 by task sshd/221 [ 35.045629] [ 35.045769] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.046313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.046927] Call Trace: [ 35.047130] <TASK> [ 35.047315] dump_stack_lvl+0x91/0xf0 [ 35.047637] print_report+0xcc/0x620 [ 35.047943] ? __virt_addr_valid+0x102/0x340 [ 35.048290] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.048671] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.049091] kasan_report+0xbe/0xf0 [ 35.050138] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.050518] vma_interval_tree_remove+0xc75/0xec0 [ 35.050896] vma_prepare+0xc54/0x11a0 [ 35.051287] __split_vma+0x5af/0x950 [ 35.051578] ? __pfx___split_vma+0x10/0x10 [ 35.051904] ? find_held_lock+0x2c/0x110 [ 35.052227] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.052575] ? lock_is_held_type+0x9f/0x120 [ 35.052929] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.053327] ? mtree_range_walk+0x632/0x900 [ 35.053681] ? mas_walk+0x5c7/0x7c0 [ 35.053978] do_vmi_munmap+0x1f1/0x2b0 [ 35.054292] mmap_region+0x1f9/0x2660 [ 35.054602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.054929] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.055381] ? __pfx_lock_acquire+0x10/0x10 [ 35.055714] ? __pfx_mmap_region+0x10/0x10 [ 35.056043] ? security_mmap_addr+0x7d/0xa0 [ 35.056379] ? get_unmapped_area+0x1f5/0x3f0 [ 35.056731] do_mmap+0x854/0xf00 [ 35.057093] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.057406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.057759] ksys_mmap_pgoff+0x3af/0x500 [ 35.058086] do_syscall_64+0x3f/0x90 [ 35.058395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.058806] RIP: 0033:0x7f3944dcbd82 [ 35.059091] 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 [ 35.060426] RSP: 002b:00007fffd05ae568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.061009] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3944dcbd82 [ 35.061532] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3944205000 [ 35.062063] RBP: 00007f3944205000 R08: 0000000000000009 R09: 0000000000001000 [ 35.062591] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec22decd90 [ 35.063123] R13: 00007fffd05ae580 R14: 00007fffd05ae5b0 R15: 00007fffd05ae910 [ 35.063652] </TASK> [ 35.063834] [ 35.063969] Allocated by task 212: [ 35.064237] kasan_save_stack+0x22/0x50 [ 35.064559] kasan_set_track+0x25/0x30 [ 35.064876] __kasan_slab_alloc+0x59/0x70 [ 35.065203] kmem_cache_alloc+0x16b/0x370 [ 35.065521] vm_area_dup+0x20/0x160 [ 35.065811] __split_vma+0x170/0x950 [ 35.066101] split_vma+0xc6/0x110 [ 35.066374] mprotect_fixup+0x8d2/0xb30 [ 35.066688] do_mprotect_pkey+0x87e/0xd40 [ 35.067017] __x64_sys_mprotect+0x78/0xc0 [ 35.067343] do_syscall_64+0x3f/0x90 [ 35.067644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.068042] [ 35.068177] Freed by task 212: [ 35.068424] kasan_save_stack+0x22/0x50 [ 35.068748] kasan_set_track+0x25/0x30 [ 35.069088] kasan_save_free_info+0x2b/0x50 [ 35.069424] __kasan_slab_free+0x10a/0x190 [ 35.069755] kmem_cache_free+0x10d/0x4d0 [ 35.070072] rcu_core+0x8c8/0x2860 [ 35.070350] __do_softirq+0x1b7/0x7d4 [ 35.070651] [ 35.070787] Last potentially related work creation: [ 35.071152] kasan_save_stack+0x22/0x50 [ 35.071468] __kasan_record_aux_stack+0x8e/0xa0 [ 35.071837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.072242] remove_vma+0x139/0x170 [ 35.072528] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.072901] do_vmi_munmap+0x1f1/0x2b0 [ 35.073204] __vm_munmap+0x138/0x3a0 [ 35.073495] __x64_sys_munmap+0x59/0x80 [ 35.073807] do_syscall_64+0x3f/0x90 [ 35.074104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.074505] [ 35.074639] The buggy address belongs to the object at ffff888009464828 [ 35.074639] which belongs to the cache vm_area_struct of size 168 [ 35.075556] The buggy address is located 88 bytes inside of [ 35.075556] freed 168-byte region [ffff888009464828, ffff8880094648d0) [ 35.076426] [ 35.076564] The buggy address belongs to the physical page: [ 35.077051] page:00000000ba1167b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9464 [ 35.077732] memcg:ffff88801a17c801 [ 35.078000] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.078404] page_type: 0xffffffff() [ 35.078686] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.079271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a17c801 [ 35.079858] page dumped because: kasan: bad access detected [ 35.080282] [ 35.080424] Memory state around the buggy address: [ 35.080838] ffff888009464780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 35.081406] ffff888009464800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.081969] >ffff888009464880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.082531] ^ [ 35.082804] ffff888009464900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.083358] ffff888009464980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 35.083922] ================================================================== [ 35.084641] Disabling lock debugging due to kernel taint [ 37.278917] BUG: Bad rss-counter state mm:00000000d1b4ea75 type:MM_FILEPAGES val:33 [ 37.279845] BUG: Bad rss-counter state mm:00000000d1b4ea75 type:MM_ANONPAGES val:22 [ 37.797561] BUG: Bad rss-counter state mm:0000000039ab5ac7 type:MM_FILEPAGES val:33 [ 37.798188] BUG: Bad rss-counter state mm:0000000039ab5ac7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16382' (ECDSA) to the list of known hosts. 2023/06/21 10:18:06 fuzzer started 2023/06/21 10:18:07 dialing manager at localhost:36067 2023/06/21 10:18:07 checking machine... 2023/06/21 10:18:07 checking revisions... [ 38.576910] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:18:07 testing simple program... [ 38.646309] cgroup: Unknown subsys name 'net' [ 38.713167] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:18:06 Registers: info registers vcpu 0 RAX=1ffffffff0bbfb97 RBX=ffffffff85dfdcbc RCX=ffffffff81809a90 RDX=0000000000000000 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffffffff85dfdcb8 RSP=ffff888016f77678 R8 =ffffffff86138976 R9 =ffff888016f77770 R10=0000000000038001 R11=0000000000020cbd R12=ffffffff85dfdcc0 R13=ffffffff85dfdcb8 R14=ffffffff85dfdcb8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007fb13494e900 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=00007ffd659f3000 CR3=000000000fc40000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fffbfcc7bb8 CR3=0000000005482000 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=00007f68e63565100000560203df2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000