syzkaller login: [ 30.194223] BUG: Bad rss-counter state mm:0000000096c6ef98 type:MM_FILEPAGES val:33 [ 30.195701] BUG: Bad rss-counter state mm:0000000096c6ef98 type:MM_ANONPAGES val:22 [ 30.360874] ================================================================== [ 30.361785] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.362734] Read of size 8 at addr ffff88800c596d08 by task sshd/220 [ 30.363514] [ 30.363822] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.364697] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.365680] Call Trace: [ 30.366014] [ 30.366304] dump_stack_lvl+0x91/0xf0 [ 30.366810] print_report+0xcc/0x620 [ 30.367292] ? __virt_addr_valid+0x102/0x340 [ 30.367850] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.368477] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.369096] kasan_report+0xbe/0xf0 [ 30.369579] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.370199] vma_interval_tree_remove+0xc75/0xec0 [ 30.370832] vma_prepare+0xc54/0x11a0 [ 30.371319] __split_vma+0x5af/0x950 [ 30.371794] ? __pfx___split_vma+0x10/0x10 [ 30.372337] ? find_held_lock+0x2c/0x110 [ 30.372853] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.373422] ? lock_is_held_type+0x9f/0x120 [ 30.374029] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.374653] ? mtree_range_walk+0x632/0x900 [ 30.375213] ? mas_walk+0x5c7/0x7c0 [ 30.375699] do_vmi_munmap+0x1f1/0x2b0 [ 30.376196] mmap_region+0x1f9/0x2660 [ 30.376682] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.377201] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.377915] ? __pfx_lock_acquire+0x10/0x10 [ 30.378451] ? __pfx_mmap_region+0x10/0x10 [ 30.379019] ? security_mmap_addr+0x7d/0xa0 [ 30.379551] ? get_unmapped_area+0x1f5/0x3f0 [ 30.380101] do_mmap+0x854/0xf00 [ 30.380542] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.381039] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.381613] ksys_mmap_pgoff+0x3af/0x500 [ 30.382128] do_syscall_64+0x3f/0x90 [ 30.382617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.383274] RIP: 0033:0x7f6cde50fd82 [ 30.383730] 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 [ 30.385858] RSP: 002b:00007ffd9e4b67e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.386765] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6cde50fd82 [ 30.387617] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6cdd949000 [ 30.388459] RBP: 00007f6cdd949000 R08: 0000000000000009 R09: 0000000000001000 [ 30.389310] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dda5653ec0 [ 30.390162] R13: 00007ffd9e4b6800 R14: 00007ffd9e4b6830 R15: 00007ffd9e4b6b90 [ 30.391034] [ 30.391327] [ 30.391544] Allocated by task 213: [ 30.391973] kasan_save_stack+0x22/0x50 [ 30.392477] kasan_set_track+0x25/0x30 [ 30.392972] __kasan_slab_alloc+0x59/0x70 [ 30.393496] kmem_cache_alloc+0x16b/0x370 [ 30.394011] vm_area_dup+0x20/0x160 [ 30.394467] __split_vma+0x170/0x950 [ 30.394936] split_vma+0xc6/0x110 [ 30.395375] mprotect_fixup+0x8d2/0xb30 [ 30.395876] do_mprotect_pkey+0x87e/0xd40 [ 30.396398] __x64_sys_mprotect+0x78/0xc0 [ 30.396919] do_syscall_64+0x3f/0x90 [ 30.397403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.398046] [ 30.398263] Freed by task 210: [ 30.398661] kasan_save_stack+0x22/0x50 [ 30.399162] kasan_set_track+0x25/0x30 [ 30.399658] kasan_save_free_info+0x2b/0x50 [ 30.400191] __kasan_slab_free+0x10a/0x190 [ 30.400721] kmem_cache_free+0x10d/0x4d0 [ 30.401242] rcu_core+0x8c8/0x2860 [ 30.401688] __do_softirq+0x1b7/0x7d4 [ 30.402165] [ 30.402377] Last potentially related work creation: [ 30.402983] kasan_save_stack+0x22/0x50 [ 30.403485] __kasan_record_aux_stack+0x8e/0xa0 [ 30.404065] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.404706] remove_vma+0x139/0x170 [ 30.405160] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.405716] do_vmi_munmap+0x1f1/0x2b0 [ 30.406201] __vm_munmap+0x138/0x3a0 [ 30.406682] __x64_sys_munmap+0x59/0x80 [ 30.407189] do_syscall_64+0x3f/0x90 [ 30.407672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.408316] [ 30.408534] The buggy address belongs to the object at ffff88800c596cb0 [ 30.408534] which belongs to the cache vm_area_struct of size 168 [ 30.409998] The buggy address is located 88 bytes inside of [ 30.409998] freed 168-byte region [ffff88800c596cb0, ffff88800c596d58) [ 30.411407] [ 30.411624] The buggy address belongs to the physical page: [ 30.412273] page:00000000e8ced419 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc596 [ 30.413347] memcg:ffff88800fee5c01 [ 30.413778] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.414419] page_type: 0xffffffff() [ 30.414892] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.415803] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fee5c01 [ 30.416716] page dumped because: kasan: bad access detected [ 30.417374] [ 30.417591] Memory state around the buggy address: [ 30.418172] ffff88800c596c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.419031] ffff88800c596c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.419890] >ffff88800c596d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.420736] ^ [ 30.421178] ffff88800c596d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.422031] ffff88800c596e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.422876] ================================================================== [ 30.424161] Disabling lock debugging due to kernel taint [ 32.385576] BUG: Bad rss-counter state mm:00000000bac6f7c8 type:MM_FILEPAGES val:33 [ 32.386760] BUG: Bad rss-counter state mm:00000000bac6f7c8 type:MM_ANONPAGES val:22 [ 32.770684] BUG: Bad rss-counter state mm:00000000209015d1 type:MM_FILEPAGES val:33 [ 32.771678] BUG: Bad rss-counter state mm:00000000209015d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17741' (ECDSA) to the list of known hosts. 2023/06/20 16:50:19 fuzzer started 2023/06/20 16:50:19 dialing manager at localhost:36067 2023/06/20 16:50:19 checking machine... 2023/06/20 16:50:19 checking revisions... [ 33.473451] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:50:19 testing simple program... [ 33.528216] cgroup: Unknown subsys name 'net' [ 33.565961] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:50:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ab1fc48 RCX=0000000000000000 RDX=ffff888017c30000 RSI=ffffffff8189f2d2 RDI=0000000000000005 RBP=ffff88800ab1fb00 RSP=ffff88800ab1fa00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88801b842000 R13=0000000000000040 R14=0000000000000141 R15=ffff888008c14c20 RIP=ffffffff814c089b 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 00007fe1dc093900 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=0000561f7834a954 CR3=000000001ab56000 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=ffff888008c04400 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=00007f8c71ea9c98 CR3=000000000c606000 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=1a63b9a4c2515db13c46e492ee48304b XMM02=2c67c8bc2e329bc3000000000011d320 XMM03=fb795ef6d657705600000000001219e8 XMM04=17817946caffa98a00000000000ae988 XMM05=b2feb3b002edf6f900000000001322d0 XMM06=c291bd5c70af25b900000000001316f8 XMM07=e042d86d42eb936e0000000000121c68 XMM08=e5f7a8eb974892b2000000000011d380 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000