syzkaller login: [ 36.190862] BUG: Bad rss-counter state mm:0000000098195d07 type:MM_FILEPAGES val:33 [ 36.192108] BUG: Bad rss-counter state mm:0000000098195d07 type:MM_ANONPAGES val:22 [ 36.357815] ================================================================== [ 36.358911] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.360067] Read of size 8 at addr ffff888009540140 by task sshd/219 [ 36.361021] [ 36.361279] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.362335] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.363549] Call Trace: [ 36.363942] [ 36.364285] dump_stack_lvl+0x91/0xf0 [ 36.364880] print_report+0xcc/0x620 [ 36.365466] ? __virt_addr_valid+0x102/0x340 [ 36.366134] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.366891] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.367668] kasan_report+0xbe/0xf0 [ 36.368236] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.369001] vma_interval_tree_remove+0xc75/0xec0 [ 36.369748] vma_prepare+0xc54/0x11a0 [ 36.370344] __split_vma+0x5af/0x950 [ 36.370913] ? __pfx___split_vma+0x10/0x10 [ 36.371556] ? find_held_lock+0x2c/0x110 [ 36.372191] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.372881] ? lock_is_held_type+0x9f/0x120 [ 36.373548] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.374279] ? mtree_range_walk+0x632/0x900 [ 36.374944] ? mas_walk+0x5c7/0x7c0 [ 36.375538] do_vmi_munmap+0x1f1/0x2b0 [ 36.376136] mmap_region+0x1f9/0x2660 [ 36.376721] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.377342] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.378220] ? __pfx_lock_acquire+0x10/0x10 [ 36.378866] ? __pfx_mmap_region+0x10/0x10 [ 36.379529] ? security_mmap_addr+0x7d/0xa0 [ 36.380193] ? get_unmapped_area+0x1f5/0x3f0 [ 36.380863] do_mmap+0x854/0xf00 [ 36.381388] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.381993] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.382679] ksys_mmap_pgoff+0x3af/0x500 [ 36.383304] do_syscall_64+0x3f/0x90 [ 36.383890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.384668] RIP: 0033:0x7f27c2636d82 [ 36.385230] 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 [ 36.387892] RSP: 002b:00007ffe5b4af2e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.389021] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f27c2636d82 [ 36.390073] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f27c1a70000 [ 36.391120] RBP: 00007f27c1a70000 R08: 0000000000000009 R09: 0000000000001000 [ 36.392189] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625f3208ec0 [ 36.393231] R13: 00007ffe5b4af300 R14: 00007ffe5b4af330 R15: 00007ffe5b4af690 [ 36.394298] [ 36.394651] [ 36.394907] Allocated by task 212: [ 36.395435] kasan_save_stack+0x22/0x50 [ 36.396055] kasan_set_track+0x25/0x30 [ 36.396658] __kasan_slab_alloc+0x59/0x70 [ 36.397302] kmem_cache_alloc+0x16b/0x370 [ 36.397930] vm_area_dup+0x20/0x160 [ 36.398484] __split_vma+0x170/0x950 [ 36.399057] split_vma+0xc6/0x110 [ 36.399599] mprotect_fixup+0x8d2/0xb30 [ 36.400211] do_mprotect_pkey+0x87e/0xd40 [ 36.400847] __x64_sys_mprotect+0x78/0xc0 [ 36.401474] do_syscall_64+0x3f/0x90 [ 36.402059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.402850] [ 36.403108] Freed by task 212: [ 36.403585] kasan_save_stack+0x22/0x50 [ 36.404188] kasan_set_track+0x25/0x30 [ 36.404787] kasan_save_free_info+0x2b/0x50 [ 36.405420] __kasan_slab_free+0x10a/0x190 [ 36.406060] kmem_cache_free+0x10d/0x4d0 [ 36.406681] rcu_core+0x8c8/0x2860 [ 36.407223] __do_softirq+0x1b7/0x7d4 [ 36.407809] [ 36.408068] Last potentially related work creation: [ 36.408795] kasan_save_stack+0x22/0x50 [ 36.409411] __kasan_record_aux_stack+0x8e/0xa0 [ 36.410120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.410900] remove_vma+0x139/0x170 [ 36.411471] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.412151] do_vmi_munmap+0x1f1/0x2b0 [ 36.412749] __vm_munmap+0x138/0x3a0 [ 36.413320] __x64_sys_munmap+0x59/0x80 [ 36.413929] do_syscall_64+0x3f/0x90 [ 36.414494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.415291] [ 36.415548] Second to last potentially related work creation: [ 36.416396] kasan_save_stack+0x22/0x50 [ 36.417011] __kasan_record_aux_stack+0x8e/0xa0 [ 36.417709] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.418498] remove_vma+0x139/0x170 [ 36.419052] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.419708] do_vmi_munmap+0x1f1/0x2b0 [ 36.420210] mmap_region+0x1f9/0x2660 [ 36.420708] do_mmap+0x854/0xf00 [ 36.421147] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.421651] ksys_mmap_pgoff+0x3af/0x500 [ 36.422167] do_syscall_64+0x3f/0x90 [ 36.422664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.423348] [ 36.423572] The buggy address belongs to the object at ffff8880095400e8 [ 36.423572] which belongs to the cache vm_area_struct of size 168 [ 36.425108] The buggy address is located 88 bytes inside of [ 36.425108] freed 168-byte region [ffff8880095400e8, ffff888009540190) [ 36.426496] [ 36.426724] The buggy address belongs to the physical page: [ 36.427357] page:00000000ff875f82 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9540 [ 36.428412] memcg:ffff88800ea8e401 [ 36.428837] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.429492] page_type: 0xffffffff() [ 36.429938] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b8dc0 dead000000000007 [ 36.430823] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea8e401 [ 36.431720] page dumped because: kasan: bad access detected [ 36.432437] [ 36.432689] Memory state around the buggy address: [ 36.433282] ffff888009540000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.434118] ffff888009540080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 36.434980] >ffff888009540100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.435845] ^ [ 36.436450] ffff888009540180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 36.437302] ffff888009540200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.438139] ================================================================== [ 36.439408] Disabling lock debugging due to kernel taint [ 38.408745] BUG: Bad rss-counter state mm:0000000073c7fcd6 type:MM_FILEPAGES val:33 [ 38.409860] BUG: Bad rss-counter state mm:0000000073c7fcd6 type:MM_ANONPAGES val:22 [ 38.856804] BUG: Bad rss-counter state mm:0000000005931c8e type:MM_FILEPAGES val:33 [ 38.857935] BUG: Bad rss-counter state mm:0000000005931c8e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44416' (ECDSA) to the list of known hosts. 2023/06/20 15:50:42 fuzzer started 2023/06/20 15:50:42 dialing manager at localhost:36067 2023/06/20 15:50:42 checking machine... 2023/06/20 15:50:42 checking revisions... [ 39.496550] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:50:42 testing simple program... [ 39.544119] cgroup: Unknown subsys name 'net' [ 39.600791] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:50:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b7f5e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880095bf468 RSP=ffff8880095bf3a0 R8 =ffffffff863b7f62 R9 =ffff8880095bf450 R10=0000000000038001 R11=000000000008b5b9 R12=ffff8880095bf470 R13=ffff8880095bf458 R14=ffff8880095bf451 R15=ffff8880095bf410 RIP=ffffffff81130ad6 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 00007efd58a68900 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=00007ffec56d4000 CR3=000000000db14000 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=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 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=00007f2f62e79800 CR3=0000000018cae000 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=2032343a30353a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a30353a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000