syzkaller login: [ 30.460591] BUG: Bad rss-counter state mm:0000000033da7074 type:MM_FILEPAGES val:33 [ 30.461838] BUG: Bad rss-counter state mm:0000000033da7074 type:MM_ANONPAGES val:22 [ 30.498190] ================================================================== [ 30.498684] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.499200] Read of size 8 at addr ffff88800fb16ed8 by task sshd/221 [ 30.499614] [ 30.499731] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.500193] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.500720] Call Trace: [ 30.500894] [ 30.501046] dump_stack_lvl+0x91/0xf0 [ 30.501316] print_report+0xcc/0x620 [ 30.501579] ? __virt_addr_valid+0x102/0x340 [ 30.501876] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.502227] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.502557] kasan_report+0xbe/0xf0 [ 30.502815] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.503150] vma_interval_tree_remove+0xc75/0xec0 [ 30.503579] vma_prepare+0xc54/0x11a0 [ 30.503841] __split_vma+0x5af/0x950 [ 30.504100] ? __pfx___split_vma+0x10/0x10 [ 30.504387] ? find_held_lock+0x2c/0x110 [ 30.504672] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.504978] ? lock_is_held_type+0x9f/0x120 [ 30.505271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.505611] ? mtree_range_walk+0x632/0x900 [ 30.505914] ? mas_walk+0x5c7/0x7c0 [ 30.506175] do_vmi_munmap+0x1f1/0x2b0 [ 30.506440] mmap_region+0x1f9/0x2660 [ 30.506702] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.506980] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.507372] ? __pfx_lock_acquire+0x10/0x10 [ 30.507660] ? __pfx_mmap_region+0x10/0x10 [ 30.507949] ? security_mmap_addr+0x7d/0xa0 [ 30.508238] ? get_unmapped_area+0x1f5/0x3f0 [ 30.508536] do_mmap+0x854/0xf00 [ 30.508772] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.509039] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.509342] ksys_mmap_pgoff+0x3af/0x500 [ 30.509614] do_syscall_64+0x3f/0x90 [ 30.509877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.510244] RIP: 0033:0x7f49c6491d82 [ 30.510487] 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 [ 30.511624] RSP: 002b:00007ffc85645b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.512119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49c6491d82 [ 30.512581] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49c58cb000 [ 30.513035] RBP: 00007f49c58cb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.513492] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec981a4ec0 [ 30.513940] R13: 00007ffc85645ba0 R14: 00007ffc85645bd0 R15: 00007ffc85645f30 [ 30.514409] [ 30.514568] [ 30.514683] Allocated by task 214: [ 30.514921] kasan_save_stack+0x22/0x50 [ 30.515199] kasan_set_track+0x25/0x30 [ 30.515461] __kasan_slab_alloc+0x59/0x70 [ 30.515740] kmem_cache_alloc+0x16b/0x370 [ 30.516020] vm_area_dup+0x20/0x160 [ 30.516265] __split_vma+0x170/0x950 [ 30.516513] split_vma+0xc6/0x110 [ 30.516750] mprotect_fixup+0x8d2/0xb30 [ 30.517021] do_mprotect_pkey+0x87e/0xd40 [ 30.517302] __x64_sys_mprotect+0x78/0xc0 [ 30.517584] do_syscall_64+0x3f/0x90 [ 30.517838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.518210] [ 30.518326] Freed by task 214: [ 30.518541] kasan_save_stack+0x22/0x50 [ 30.518812] kasan_set_track+0x25/0x30 [ 30.519076] kasan_save_free_info+0x2b/0x50 [ 30.519359] __kasan_slab_free+0x10a/0x190 [ 30.519644] kmem_cache_free+0x10d/0x4d0 [ 30.519919] rcu_core+0x8c8/0x2860 [ 30.520168] __do_softirq+0x1b7/0x7d4 [ 30.520423] [ 30.520543] Last potentially related work creation: [ 30.520860] kasan_save_stack+0x22/0x50 [ 30.521135] __kasan_record_aux_stack+0x8e/0xa0 [ 30.521441] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.521790] remove_vma+0x139/0x170 [ 30.522044] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.522339] do_vmi_munmap+0x1f1/0x2b0 [ 30.522604] __vm_munmap+0x138/0x3a0 [ 30.522855] __x64_sys_munmap+0x59/0x80 [ 30.523121] do_syscall_64+0x3f/0x90 [ 30.523384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.523725] [ 30.523841] The buggy address belongs to the object at ffff88800fb16e80 [ 30.523841] which belongs to the cache vm_area_struct of size 168 [ 30.524639] The buggy address is located 88 bytes inside of [ 30.524639] freed 168-byte region [ffff88800fb16e80, ffff88800fb16f28) [ 30.525397] [ 30.525515] The buggy address belongs to the physical page: [ 30.525869] page:00000000a0d52c51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb16 [ 30.526454] memcg:ffff888010022c01 [ 30.526680] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.527028] page_type: 0xffffffff() [ 30.527269] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.527770] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010022c01 [ 30.528266] page dumped because: kasan: bad access detected [ 30.528625] [ 30.528741] Memory state around the buggy address: [ 30.529060] ffff88800fb16d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.529518] ffff88800fb16e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.529984] >ffff88800fb16e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.530455] ^ [ 30.530847] ffff88800fb16f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.531327] ffff88800fb16f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.531785] ================================================================== [ 30.532300] Disabling lock debugging due to kernel taint [ 31.920470] BUG: Bad rss-counter state mm:00000000eef77c6f type:MM_FILEPAGES val:33 [ 31.921493] BUG: Bad rss-counter state mm:00000000eef77c6f type:MM_ANONPAGES val:22 [ 32.306787] BUG: Bad rss-counter state mm:00000000bd5a51dc type:MM_FILEPAGES val:33 [ 32.307569] BUG: Bad rss-counter state mm:00000000bd5a51dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44435' (ECDSA) to the list of known hosts. 2023/06/20 16:09:53 fuzzer started 2023/06/20 16:09:53 dialing manager at localhost:36067 2023/06/20 16:09:53 checking machine... 2023/06/20 16:09:53 checking revisions... [ 32.988888] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:09:53 testing simple program... [ 33.029240] cgroup: Unknown subsys name 'net' [ 33.060637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:09:53 Registers: info registers vcpu 0 RAX=ffffed100120bab4 RBX=ffffed100120bab5 RCX=ffffffff8124d4e3 RDX=ffffed100120bab5 RSI=0000000000000008 RDI=ffff88800905d5a0 RBP=ffffed100120bab4 RSP=ffff888016d07b78 R8 =0000000000000000 R9 =ffffed100120bab4 R10=ffff88800905d5a7 R11=0000000000000000 R12=0000000000000287 R13=ffff88800905dad0 R14=ffff88800905d1d4 R15=ffff88806ce39500 RIP=ffffffff8180f189 RFL=00000046 [---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 00007f382407b700 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=00007f49b17710b0 CR3=000000000fc1c000 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=39303a3631203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383330 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f39032cf4c0 CR3=000000000978c000 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=512f04f0c6590293764a212c92cdf7f9 XMM02=ec2efd57dc4c00df000000000011a988 XMM03=7582dd0c6eddaa0f000000000011aa58 XMM04=9d02b9953cea1a3900000000000ae988 XMM05=b1877cfde5a0bc720000000000132bc8 XMM06=c291bd5c70af25b90000000000131c68 XMM07=e042d86d42eb936e00000000001221b8 XMM08=7582dd0c6eddaa0f000000000011aa58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000