syzkaller login: [ 30.806525] BUG: Bad rss-counter state mm:0000000027c04471 type:MM_FILEPAGES val:33 [ 30.807689] BUG: Bad rss-counter state mm:0000000027c04471 type:MM_ANONPAGES val:22 [ 30.847043] ================================================================== [ 30.848053] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.849141] Read of size 8 at addr ffff888019a803f8 by task sshd/222 [ 30.849915] [ 30.850131] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.851010] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.851993] Call Trace: [ 30.852316] [ 30.852601] dump_stack_lvl+0x91/0xf0 [ 30.853107] print_report+0xcc/0x620 [ 30.853599] ? __virt_addr_valid+0x102/0x340 [ 30.854147] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854775] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.855394] kasan_report+0xbe/0xf0 [ 30.855880] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.856519] vma_interval_tree_remove+0xc75/0xec0 [ 30.857142] vma_prepare+0xc54/0x11a0 [ 30.857633] __split_vma+0x5af/0x950 [ 30.858105] ? __pfx___split_vma+0x10/0x10 [ 30.858630] ? find_held_lock+0x2c/0x110 [ 30.859151] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.859715] ? lock_is_held_type+0x9f/0x120 [ 30.860254] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.860862] ? mtree_range_walk+0x632/0x900 [ 30.861448] ? mas_walk+0x5c7/0x7c0 [ 30.861952] do_vmi_munmap+0x1f1/0x2b0 [ 30.862445] mmap_region+0x1f9/0x2660 [ 30.862941] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.863461] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.864176] ? __pfx_lock_acquire+0x10/0x10 [ 30.864740] ? __pfx_mmap_region+0x10/0x10 [ 30.865285] ? security_mmap_addr+0x7d/0xa0 [ 30.865825] ? get_unmapped_area+0x1f5/0x3f0 [ 30.866395] do_mmap+0x854/0xf00 [ 30.866842] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.867341] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.867915] ksys_mmap_pgoff+0x3af/0x500 [ 30.868437] do_syscall_64+0x3f/0x90 [ 30.868940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.869594] RIP: 0033:0x7fccff340d82 [ 30.870055] 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 [ 30.872230] RSP: 002b:00007ffdefd96e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.873153] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccff340d82 [ 30.874011] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccfe77a000 [ 30.874866] RBP: 00007fccfe77a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.875723] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca5072dec0 [ 30.876577] R13: 00007ffdefd96e40 R14: 00007ffdefd96e70 R15: 00007ffdefd971d0 [ 30.877459] [ 30.877752] [ 30.877970] Allocated by task 215: [ 30.878405] kasan_save_stack+0x22/0x50 [ 30.878921] kasan_set_track+0x25/0x30 [ 30.879419] __kasan_slab_alloc+0x59/0x70 [ 30.879946] kmem_cache_alloc+0x16b/0x370 [ 30.880468] vm_area_dup+0x20/0x160 [ 30.880950] __split_vma+0x170/0x950 [ 30.881427] split_vma+0xc6/0x110 [ 30.881870] mprotect_fixup+0x8d2/0xb30 [ 30.882369] do_mprotect_pkey+0x87e/0xd40 [ 30.882887] __x64_sys_mprotect+0x78/0xc0 [ 30.883408] do_syscall_64+0x3f/0x90 [ 30.883892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.884557] [ 30.884772] Freed by task 215: [ 30.885179] kasan_save_stack+0x22/0x50 [ 30.885695] kasan_set_track+0x25/0x30 [ 30.886196] kasan_save_free_info+0x2b/0x50 [ 30.886736] __kasan_slab_free+0x10a/0x190 [ 30.887274] kmem_cache_free+0x10d/0x4d0 [ 30.887797] rcu_core+0x8c8/0x2860 [ 30.888239] __do_softirq+0x1b7/0x7d4 [ 30.888728] [ 30.888964] Last potentially related work creation: [ 30.889561] kasan_save_stack+0x22/0x50 [ 30.890072] __kasan_record_aux_stack+0x8e/0xa0 [ 30.890655] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.891302] remove_vma+0x139/0x170 [ 30.891756] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.892312] do_vmi_munmap+0x1f1/0x2b0 [ 30.892797] __vm_munmap+0x138/0x3a0 [ 30.893280] __x64_sys_munmap+0x59/0x80 [ 30.893776] do_syscall_64+0x3f/0x90 [ 30.894246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.894902] [ 30.895116] The buggy address belongs to the object at ffff888019a803a0 [ 30.895116] which belongs to the cache vm_area_struct of size 168 [ 30.896614] The buggy address is located 88 bytes inside of [ 30.896614] freed 168-byte region [ffff888019a803a0, ffff888019a80448) [ 30.898050] [ 30.898268] The buggy address belongs to the physical page: [ 30.898957] page:00000000c7909df4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a80 [ 30.900044] memcg:ffff888018c4db01 [ 30.900467] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.901141] page_type: 0xffffffff() [ 30.901607] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.902529] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c4db01 [ 30.903445] page dumped because: kasan: bad access detected [ 30.904118] [ 30.904338] Memory state around the buggy address: [ 30.904937] ffff888019a80280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.905813] ffff888019a80300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.906682] >ffff888019a80380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.907547] ^ [ 30.908394] ffff888019a80400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.909283] ffff888019a80480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.910145] ================================================================== [ 30.911228] Disabling lock debugging due to kernel taint [ 33.142744] BUG: Bad rss-counter state mm:00000000a8eceef4 type:MM_FILEPAGES val:33 [ 33.143768] BUG: Bad rss-counter state mm:00000000a8eceef4 type:MM_ANONPAGES val:22 [ 33.522510] BUG: Bad rss-counter state mm:00000000d746fa74 type:MM_FILEPAGES val:33 [ 33.523489] BUG: Bad rss-counter state mm:00000000d746fa74 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25932' (ECDSA) to the list of known hosts. 2023/06/20 16:17:32 fuzzer started 2023/06/20 16:17:33 dialing manager at localhost:36067 2023/06/20 16:17:33 checking machine... 2023/06/20 16:17:33 checking revisions... [ 34.245713] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:17:33 testing simple program... [ 34.300567] cgroup: Unknown subsys name 'net' [ 34.355050] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:17:32 Registers: info registers vcpu 0 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=dffffc0000000000 RSI=0000000000036000 RDI=ffff88801cd27290 RBP=ffff88801cd272e8 RSP=ffff88801cd27220 R8 =0000000000000001 R9 =ffff88801cd272d0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88801cd272f0 R13=ffff88801cd272d8 R14=ffff88801cd272d1 R15=ffff88801cd27290 RIP=ffffffff81130754 RFL=00000287 [--S--PC] 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 00007f51e9d9f900 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=00007f51ea356618 CR3=000000000c68a000 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=2032333a37313a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a37313a3631203032 XMM08=3d656e696c646d632022656369767265 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=00007f820f09a750 CR3=000000000d5f6000 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=a8722ce65bea4f96144e99907c04d0c1 XMM02=000000000011d940eff9b2d0a8fce9cb XMM03=000000000011da102c67c8bc2e329bc3 XMM04=ab12ae487ed4429000000000000ae988 XMM05=59d5b690e0af863b0000000000131f00 XMM06=27d9608bdfe2cbf20000000000130d68 XMM07=e042d86d42eb936e00000000001222f8 XMM08=6b011ad3523c2d3f000000000011da10 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000