syzkaller login: [ 30.984126] BUG: Bad rss-counter state mm:000000008e0aaa6b type:MM_FILEPAGES val:33 [ 30.985428] BUG: Bad rss-counter state mm:000000008e0aaa6b type:MM_ANONPAGES val:22 [ 31.133120] ================================================================== [ 31.134219] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.135376] Read of size 8 at addr ffff88801932f310 by task sshd/221 [ 31.136465] [ 31.136725] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.137656] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.138722] Call Trace: [ 31.139066] <TASK> [ 31.139373] dump_stack_lvl+0x91/0xf0 [ 31.139896] print_report+0xcc/0x620 [ 31.140422] ? __virt_addr_valid+0x102/0x340 [ 31.141017] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.141690] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.142359] kasan_report+0xbe/0xf0 [ 31.142879] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.143566] vma_interval_tree_remove+0xc75/0xec0 [ 31.144229] vma_prepare+0xc54/0x11a0 [ 31.144753] __split_vma+0x5af/0x950 [ 31.145260] ? __pfx___split_vma+0x10/0x10 [ 31.145830] ? find_held_lock+0x2c/0x110 [ 31.146418] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.147044] ? lock_is_held_type+0x9f/0x120 [ 31.147627] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.148292] ? mtree_range_walk+0x632/0x900 [ 31.148899] ? mas_walk+0x5c7/0x7c0 [ 31.149416] do_vmi_munmap+0x1f1/0x2b0 [ 31.149946] mmap_region+0x1f9/0x2660 [ 31.150478] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.151036] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.151804] ? __pfx_lock_acquire+0x10/0x10 [ 31.152383] ? __pfx_mmap_region+0x10/0x10 [ 31.152982] ? security_mmap_addr+0x7d/0xa0 [ 31.153588] ? get_unmapped_area+0x1f5/0x3f0 [ 31.154192] do_mmap+0x854/0xf00 [ 31.154680] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.155208] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.155809] ksys_mmap_pgoff+0x3af/0x500 [ 31.156348] do_syscall_64+0x3f/0x90 [ 31.156855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.157538] RIP: 0033:0x7efe99151d82 [ 31.158021] 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 [ 31.160324] RSP: 002b:00007ffc58dd9688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.161302] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe99151d82 [ 31.162200] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe9858b000 [ 31.163149] RBP: 00007efe9858b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.164073] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d82f22bec0 [ 31.164978] R13: 00007ffc58dd96a0 R14: 00007ffc58dd96d0 R15: 00007ffc58dd9a30 [ 31.165909] </TASK> [ 31.166228] [ 31.166475] Allocated by task 214: [ 31.166934] kasan_save_stack+0x22/0x50 [ 31.167479] kasan_set_track+0x25/0x30 [ 31.168017] __kasan_slab_alloc+0x59/0x70 [ 31.168585] kmem_cache_alloc+0x16b/0x370 [ 31.169135] vm_area_dup+0x20/0x160 [ 31.169626] __split_vma+0x170/0x950 [ 31.170128] split_vma+0xc6/0x110 [ 31.170607] mprotect_fixup+0x8d2/0xb30 [ 31.171147] do_mprotect_pkey+0x87e/0xd40 [ 31.171706] __x64_sys_mprotect+0x78/0xc0 [ 31.172281] do_syscall_64+0x3f/0x90 [ 31.172795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.173485] [ 31.173713] Freed by task 214: [ 31.174129] kasan_save_stack+0x22/0x50 [ 31.174666] kasan_set_track+0x25/0x30 [ 31.175187] kasan_save_free_info+0x2b/0x50 [ 31.175754] __kasan_slab_free+0x10a/0x190 [ 31.176321] kmem_cache_free+0x10d/0x4d0 [ 31.176880] rcu_core+0x8c8/0x2860 [ 31.177349] __do_softirq+0x1b7/0x7d4 [ 31.177969] [ 31.178201] Last potentially related work creation: [ 31.178842] kasan_save_stack+0x22/0x50 [ 31.179375] __kasan_record_aux_stack+0x8e/0xa0 [ 31.179983] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.180673] remove_vma+0x139/0x170 [ 31.181165] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.181773] do_vmi_munmap+0x1f1/0x2b0 [ 31.182304] __vm_munmap+0x138/0x3a0 [ 31.182834] __x64_sys_munmap+0x59/0x80 [ 31.183371] do_syscall_64+0x3f/0x90 [ 31.183885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.184583] [ 31.184820] Second to last potentially related work creation: [ 31.185567] kasan_save_stack+0x22/0x50 [ 31.186123] __kasan_record_aux_stack+0x8e/0xa0 [ 31.186769] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.187463] remove_vma+0x139/0x170 [ 31.187959] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.188569] do_vmi_munmap+0x1f1/0x2b0 [ 31.189104] __vm_munmap+0x138/0x3a0 [ 31.189614] __x64_sys_munmap+0x59/0x80 [ 31.190157] do_syscall_64+0x3f/0x90 [ 31.190681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.191388] [ 31.191623] The buggy address belongs to the object at ffff88801932f2b8 [ 31.191623] which belongs to the cache vm_area_struct of size 168 [ 31.193233] The buggy address is located 88 bytes inside of [ 31.193233] freed 168-byte region [ffff88801932f2b8, ffff88801932f360) [ 31.194782] [ 31.195019] The buggy address belongs to the physical page: [ 31.195737] page:0000000075968cc4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1932f [ 31.196929] memcg:ffff888019314601 [ 31.197395] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.198100] page_type: 0xffffffff() [ 31.198605] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a49c0 dead000000000004 [ 31.199611] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019314601 [ 31.200606] page dumped because: kasan: bad access detected [ 31.201337] [ 31.201569] Memory state around the buggy address: [ 31.202207] ffff88801932f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.203155] ffff88801932f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.204095] >ffff88801932f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.205035] ^ [ 31.205556] ffff88801932f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.206519] ffff88801932f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.207453] ================================================================== [ 31.208543] Disabling lock debugging due to kernel taint [ 33.186098] BUG: Bad rss-counter state mm:000000000a65816f type:MM_FILEPAGES val:33 [ 33.187708] BUG: Bad rss-counter state mm:000000000a65816f type:MM_ANONPAGES val:22 [ 33.645081] BUG: Bad rss-counter state mm:00000000da25fa73 type:MM_FILEPAGES val:33 [ 33.646019] BUG: Bad rss-counter state mm:00000000da25fa73 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41049' (ECDSA) to the list of known hosts. 2023/06/20 23:46:28 fuzzer started 2023/06/20 23:46:28 dialing manager at localhost:36067 2023/06/20 23:46:28 checking machine... 2023/06/20 23:46:28 checking revisions... [ 34.358251] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:46:28 testing simple program... [ 34.411283] cgroup: Unknown subsys name 'net' [ 34.469279] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:46:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f7b1400 RCX=0000000000000000 RDX=1ffff11001ef6282 RSI=ffffffff83aacb03 RDI=ffff88800f7b1410 RBP=0000000000000000 RSP=ffff8880099cf4a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000a1200000a12 R12=ffff88800fcf7580 R13=0000000000000000 R14=dffffc0000000000 R15=ffff88800f7b1400 RIP=ffffffff83aacb1c 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 00007faf199cc900 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=00007faf19f83618 CR3=0000000008c68000 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=2038323a36343a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a36343a3332203032 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=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=00007f7b7de1c430 CR3=0000000013b42000 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=87106a91d0efbb92a64bc202cdc3bcc3 XMM02=000000000011c3d8eff9b2d0a8fce9cb XMM03=000000000011c4a82c67c8bc2e329bc3 XMM04=51836dbdcbc5f5b900000000000ae988 XMM05=3c7aec628e7207220000000000134550 XMM06=c291bd5c70af25b90000000000133f48 XMM07=e042d86d42eb936e0000000000123c10 XMM08=e7158f23d0d44513000000000011c4a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000