syzkaller login: [ 31.183655] BUG: Bad rss-counter state mm:00000000a65e5bad type:MM_FILEPAGES val:33 [ 31.184644] BUG: Bad rss-counter state mm:00000000a65e5bad type:MM_ANONPAGES val:22 [ 31.346219] ================================================================== [ 31.347133] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.348082] Read of size 8 at addr ffff88800ca4eb38 by task sshd/220 [ 31.348848] [ 31.349134] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.349991] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.350961] Call Trace: [ 31.351279] [ 31.351566] dump_stack_lvl+0x91/0xf0 [ 31.352063] print_report+0xcc/0x620 [ 31.352556] ? __virt_addr_valid+0x102/0x340 [ 31.353133] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353748] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354359] kasan_report+0xbe/0xf0 [ 31.354831] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.355448] vma_interval_tree_remove+0xc75/0xec0 [ 31.356052] vma_prepare+0xc54/0x11a0 [ 31.356527] __split_vma+0x5af/0x950 [ 31.357011] ? __pfx___split_vma+0x10/0x10 [ 31.357536] ? find_held_lock+0x2c/0x110 [ 31.358061] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.358632] ? lock_is_held_type+0x9f/0x120 [ 31.359168] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.359768] ? mtree_range_walk+0x632/0x900 [ 31.360317] ? mas_walk+0x5c7/0x7c0 [ 31.360804] do_vmi_munmap+0x1f1/0x2b0 [ 31.361295] mmap_region+0x1f9/0x2660 [ 31.361783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.362290] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.363005] ? __pfx_lock_acquire+0x10/0x10 [ 31.363532] ? __pfx_mmap_region+0x10/0x10 [ 31.364064] ? security_mmap_addr+0x7d/0xa0 [ 31.364603] ? get_unmapped_area+0x1f5/0x3f0 [ 31.365172] do_mmap+0x854/0xf00 [ 31.365607] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.366101] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.366665] ksys_mmap_pgoff+0x3af/0x500 [ 31.367172] do_syscall_64+0x3f/0x90 [ 31.367651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.368299] RIP: 0033:0x7fd3143cfd82 [ 31.368755] 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 [ 31.370919] RSP: 002b:00007fff6e7bc4d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.371827] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd3143cfd82 [ 31.372682] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd313809000 [ 31.373549] RBP: 00007fd313809000 R08: 0000000000000009 R09: 0000000000001000 [ 31.374396] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e0fcf8ec0 [ 31.375262] R13: 00007fff6e7bc4f0 R14: 00007fff6e7bc520 R15: 00007fff6e7bc880 [ 31.376116] [ 31.376406] [ 31.376624] Allocated by task 213: [ 31.377068] kasan_save_stack+0x22/0x50 [ 31.377578] kasan_set_track+0x25/0x30 [ 31.378073] __kasan_slab_alloc+0x59/0x70 [ 31.378604] kmem_cache_alloc+0x16b/0x370 [ 31.379118] vm_area_dup+0x20/0x160 [ 31.379570] __split_vma+0x170/0x950 [ 31.380039] split_vma+0xc6/0x110 [ 31.380482] mprotect_fixup+0x8d2/0xb30 [ 31.380994] do_mprotect_pkey+0x87e/0xd40 [ 31.381514] __x64_sys_mprotect+0x78/0xc0 [ 31.382038] do_syscall_64+0x3f/0x90 [ 31.382511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.383160] [ 31.383383] Freed by task 213: [ 31.383772] kasan_save_stack+0x22/0x50 [ 31.384271] kasan_set_track+0x25/0x30 [ 31.384767] kasan_save_free_info+0x2b/0x50 [ 31.385320] __kasan_slab_free+0x10a/0x190 [ 31.385852] kmem_cache_free+0x10d/0x4d0 [ 31.386354] rcu_core+0x8c8/0x2860 [ 31.386801] __do_softirq+0x1b7/0x7d4 [ 31.387276] [ 31.387498] Last potentially related work creation: [ 31.388082] kasan_save_stack+0x22/0x50 [ 31.388588] __kasan_record_aux_stack+0x8e/0xa0 [ 31.389171] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.389816] remove_vma+0x139/0x170 [ 31.390276] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.390838] do_vmi_munmap+0x1f1/0x2b0 [ 31.391324] __vm_munmap+0x138/0x3a0 [ 31.391792] __x64_sys_munmap+0x59/0x80 [ 31.392289] do_syscall_64+0x3f/0x90 [ 31.392770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.393461] [ 31.393681] Second to last potentially related work creation: [ 31.394367] kasan_save_stack+0x22/0x50 [ 31.394867] __kasan_record_aux_stack+0x8e/0xa0 [ 31.395437] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.396079] remove_vma+0x139/0x170 [ 31.396528] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.397104] do_vmi_munmap+0x1f1/0x2b0 [ 31.397592] mmap_region+0x1f9/0x2660 [ 31.398065] do_mmap+0x854/0xf00 [ 31.398502] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.398989] ksys_mmap_pgoff+0x3af/0x500 [ 31.399489] do_syscall_64+0x3f/0x90 [ 31.399959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.400607] [ 31.400831] The buggy address belongs to the object at ffff88800ca4eae0 [ 31.400831] which belongs to the cache vm_area_struct of size 168 [ 31.402292] The buggy address is located 88 bytes inside of [ 31.402292] freed 168-byte region [ffff88800ca4eae0, ffff88800ca4eb88) [ 31.403692] [ 31.403911] The buggy address belongs to the physical page: [ 31.404569] page:00000000b8e585cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca4e [ 31.405669] memcg:ffff88800dd84f01 [ 31.406100] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.406743] page_type: 0xffffffff() [ 31.407196] raw: 0100000000000200 ffff8880087a0c80 ffffea0000359500 dead000000000002 [ 31.408111] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd84f01 [ 31.409023] page dumped because: kasan: bad access detected [ 31.409678] [ 31.409893] Memory state around the buggy address: [ 31.410473] ffff88800ca4ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.411329] ffff88800ca4ea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.412187] >ffff88800ca4eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.413043] ^ [ 31.413655] ffff88800ca4eb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.414517] ffff88800ca4ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.415368] ================================================================== [ 31.416321] Disabling lock debugging due to kernel taint [ 33.230437] BUG: Bad rss-counter state mm:00000000afd837b8 type:MM_FILEPAGES val:33 [ 33.231131] BUG: Bad rss-counter state mm:00000000afd837b8 type:MM_ANONPAGES val:22 [ 33.637525] BUG: Bad rss-counter state mm:0000000081072f93 type:MM_FILEPAGES val:33 [ 33.638574] BUG: Bad rss-counter state mm:0000000081072f93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15053' (ECDSA) to the list of known hosts. 2023/06/20 17:41:05 fuzzer started 2023/06/20 17:41:05 dialing manager at localhost:36067 2023/06/20 17:41:05 checking machine... 2023/06/20 17:41:05 checking revisions... [ 34.368188] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:41:06 testing simple program... [ 34.411841] cgroup: Unknown subsys name 'net' [ 34.451916] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:41:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015827d08 RCX=0000000000000001 RDX=1ffff11002b04eb6 RSI=ffff888015827ce8 RDI=ffff8880158275b0 RBP=ffff888015820000 RSP=ffff888015827530 R8 =0000000000000001 R9 =ffff8880158275e0 R10=0000000000038001 R11=000000000008a88c R12=ffff888015827600 R13=ffff8880158275e8 R14=ffff888015827ce8 R15=ffff8880158275a0 RIP=ffffffff81131ca6 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 00007f756560d900 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=00007ffeb256d000 CR3=000000000ecfe000 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=00007f2a693e72f0 CR3=000000000c7de000 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=2035303a31343a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a31343a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000