syzkaller login: [ 30.775328] BUG: Bad rss-counter state mm:00000000446034d6 type:MM_FILEPAGES val:33 [ 30.776289] BUG: Bad rss-counter state mm:00000000446034d6 type:MM_ANONPAGES val:22 [ 30.947484] ================================================================== [ 30.948333] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.949213] Read of size 8 at addr ffff88800d836b38 by task sshd/220 [ 30.950012] [ 30.950223] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.951053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.951972] Call Trace: [ 30.952271] <TASK> [ 30.952543] dump_stack_lvl+0x91/0xf0 [ 30.953005] print_report+0xcc/0x620 [ 30.953458] ? __virt_addr_valid+0x102/0x340 [ 30.953988] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.954577] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.955158] kasan_report+0xbe/0xf0 [ 30.955611] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.956201] vma_interval_tree_remove+0xc75/0xec0 [ 30.956768] vma_prepare+0xc54/0x11a0 [ 30.957244] __split_vma+0x5af/0x950 [ 30.957717] ? __pfx___split_vma+0x10/0x10 [ 30.958240] ? find_held_lock+0x2c/0x110 [ 30.958769] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.959332] ? lock_is_held_type+0x9f/0x120 [ 30.959881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.960478] ? mtree_range_walk+0x632/0x900 [ 30.961031] ? mas_walk+0x5c7/0x7c0 [ 30.961498] do_vmi_munmap+0x1f1/0x2b0 [ 30.961996] mmap_region+0x1f9/0x2660 [ 30.962496] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.963006] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.963718] ? __pfx_lock_acquire+0x10/0x10 [ 30.964380] ? __pfx_mmap_region+0x10/0x10 [ 30.964918] ? security_mmap_addr+0x7d/0xa0 [ 30.965439] ? get_unmapped_area+0x1f5/0x3f0 [ 30.965995] do_mmap+0x854/0xf00 [ 30.966428] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.966941] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.967502] ksys_mmap_pgoff+0x3af/0x500 [ 30.968012] do_syscall_64+0x3f/0x90 [ 30.968477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.969113] RIP: 0033:0x7f3fd966ad82 [ 30.969570] 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 [ 30.971698] RSP: 002b:00007ffcfa92bf48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.972600] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3fd966ad82 [ 30.973444] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3fd8aa4000 [ 30.974288] RBP: 00007f3fd8aa4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.975141] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f669466ec0 [ 30.975999] R13: 00007ffcfa92bf60 R14: 00007ffcfa92bf90 R15: 00007ffcfa92c2f0 [ 30.976855] </TASK> [ 30.977145] [ 30.977360] Allocated by task 213: [ 30.977776] kasan_save_stack+0x22/0x50 [ 30.978275] kasan_set_track+0x25/0x30 [ 30.978779] __kasan_slab_alloc+0x59/0x70 [ 30.979291] kmem_cache_alloc+0x16b/0x370 [ 30.979810] vm_area_dup+0x20/0x160 [ 30.980261] __split_vma+0x170/0x950 [ 30.980723] split_vma+0xc6/0x110 [ 30.981156] mprotect_fixup+0x8d2/0xb30 [ 30.981647] do_mprotect_pkey+0x87e/0xd40 [ 30.982169] __x64_sys_mprotect+0x78/0xc0 [ 30.982706] do_syscall_64+0x3f/0x90 [ 30.983191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.983844] [ 30.984067] Freed by task 213: [ 30.984467] kasan_save_stack+0x22/0x50 [ 30.984978] kasan_set_track+0x25/0x30 [ 30.985474] kasan_save_free_info+0x2b/0x50 [ 30.986018] __kasan_slab_free+0x10a/0x190 [ 30.986561] kmem_cache_free+0x10d/0x4d0 [ 30.987078] rcu_core+0x8c8/0x2860 [ 30.987527] __do_softirq+0x1b7/0x7d4 [ 30.988013] [ 30.988226] Last potentially related work creation: [ 30.988813] kasan_save_stack+0x22/0x50 [ 30.989319] __kasan_record_aux_stack+0x8e/0xa0 [ 30.989913] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.990599] remove_vma+0x139/0x170 [ 30.991061] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.991628] do_vmi_munmap+0x1f1/0x2b0 [ 30.992124] __vm_munmap+0x138/0x3a0 [ 30.992591] __x64_sys_munmap+0x59/0x80 [ 30.993085] do_syscall_64+0x3f/0x90 [ 30.993562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.994228] [ 30.994450] The buggy address belongs to the object at ffff88800d836ae0 [ 30.994450] which belongs to the cache vm_area_struct of size 168 [ 30.995927] The buggy address is located 88 bytes inside of [ 30.995927] freed 168-byte region [ffff88800d836ae0, ffff88800d836b88) [ 30.997366] [ 30.997579] The buggy address belongs to the physical page: [ 30.998228] page:000000007babd821 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd836 [ 30.999328] memcg:ffff8880094d3901 [ 30.999758] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.000401] page_type: 0xffffffff() [ 31.000860] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.001789] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094d3901 [ 31.002708] page dumped because: kasan: bad access detected [ 31.003369] [ 31.003580] Memory state around the buggy address: [ 31.004151] ffff88800d836a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.005015] ffff88800d836a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.005867] >ffff88800d836b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.006728] ^ [ 31.007350] ffff88800d836b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.008215] ffff88800d836c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.009065] ================================================================== [ 31.010094] Disabling lock debugging due to kernel taint [ 32.897754] BUG: Bad rss-counter state mm:00000000e1e599d6 type:MM_FILEPAGES val:33 [ 32.898521] BUG: Bad rss-counter state mm:00000000e1e599d6 type:MM_ANONPAGES val:22 [ 33.336567] BUG: Bad rss-counter state mm:00000000a475d79d type:MM_FILEPAGES val:33 [ 33.337433] BUG: Bad rss-counter state mm:00000000a475d79d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35144' (ECDSA) to the list of known hosts. 2023/06/20 12:04:34 fuzzer started 2023/06/20 12:04:34 dialing manager at localhost:36067 2023/06/20 12:04:34 checking machine... 2023/06/20 12:04:34 checking revisions... [ 34.065449] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:04:35 testing simple program... [ 34.113998] cgroup: Unknown subsys name 'net' [ 34.214911] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:04:34 Registers: info registers vcpu 0 RAX=00000016cd3917dc RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=0000000000053c07 RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000efbda R11=0000000000000001 R12=0000000000053c07 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff81106295 RFL=00000013 [----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 00007f69dd93d900 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=00007f69dd91c020 CR3=00000000099d4000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f89f452f280 CR3=000000000cbce000 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=2034333a34303a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a34303a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000