syzkaller login: [ 46.944105] BUG: Bad rss-counter state mm:00000000387ea9dd type:MM_FILEPAGES val:33 [ 46.945351] BUG: Bad rss-counter state mm:00000000387ea9dd type:MM_ANONPAGES val:22 [ 47.095398] ================================================================== [ 47.096304] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.097235] Read of size 8 at addr ffff88800d973058 by task sshd/221 [ 47.098095] [ 47.098333] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.099190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.100166] Call Trace: [ 47.100481] [ 47.100764] dump_stack_lvl+0x91/0xf0 [ 47.101246] print_report+0xcc/0x620 [ 47.101724] ? __virt_addr_valid+0x102/0x340 [ 47.102296] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.102908] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.103518] kasan_report+0xbe/0xf0 [ 47.103993] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.104614] vma_interval_tree_remove+0xc75/0xec0 [ 47.105210] vma_prepare+0xc54/0x11a0 [ 47.105708] __split_vma+0x5af/0x950 [ 47.106199] ? __pfx___split_vma+0x10/0x10 [ 47.106788] ? find_held_lock+0x2c/0x110 [ 47.107406] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.107946] ? lock_is_held_type+0x9f/0x120 [ 47.108458] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.109033] ? mtree_range_walk+0x632/0x900 [ 47.109559] ? mas_walk+0x5c7/0x7c0 [ 47.110014] do_vmi_munmap+0x1f1/0x2b0 [ 47.110508] mmap_region+0x1f9/0x2660 [ 47.110970] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.111465] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.112178] ? __pfx_lock_acquire+0x10/0x10 [ 47.112708] ? __pfx_mmap_region+0x10/0x10 [ 47.113232] ? security_mmap_addr+0x7d/0xa0 [ 47.113757] ? get_unmapped_area+0x1f5/0x3f0 [ 47.114322] do_mmap+0x854/0xf00 [ 47.114761] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.115257] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.115801] ksys_mmap_pgoff+0x3af/0x500 [ 47.116301] do_syscall_64+0x3f/0x90 [ 47.116769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.117410] RIP: 0033:0x7f74824fcd82 [ 47.117860] 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 [ 47.119963] RSP: 002b:00007ffde8487f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.120875] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74824fcd82 [ 47.121702] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7481936000 [ 47.122549] RBP: 00007f7481936000 R08: 0000000000000009 R09: 0000000000001000 [ 47.123379] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581e9e4bf70 [ 47.124214] R13: 00007ffde8487f30 R14: 00007ffde8487f60 R15: 00007ffde84882c0 [ 47.125058] [ 47.125356] [ 47.125573] Allocated by task 214: [ 47.125997] kasan_save_stack+0x22/0x50 [ 47.126504] kasan_set_track+0x25/0x30 [ 47.126998] __kasan_slab_alloc+0x59/0x70 [ 47.127523] kmem_cache_alloc+0x16b/0x370 [ 47.128030] vm_area_dup+0x20/0x160 [ 47.128475] __split_vma+0x170/0x950 [ 47.128939] split_vma+0xc6/0x110 [ 47.129377] mprotect_fixup+0x8d2/0xb30 [ 47.129869] do_mprotect_pkey+0x87e/0xd40 [ 47.130384] __x64_sys_mprotect+0x78/0xc0 [ 47.130900] do_syscall_64+0x3f/0x90 [ 47.131378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.132017] [ 47.132229] Freed by task 204: [ 47.132625] kasan_save_stack+0x22/0x50 [ 47.133128] kasan_set_track+0x25/0x30 [ 47.133613] kasan_save_free_info+0x2b/0x50 [ 47.134155] __kasan_slab_free+0x10a/0x190 [ 47.134684] kmem_cache_free+0x10d/0x4d0 [ 47.135190] rcu_core+0x8c8/0x2860 [ 47.135635] __do_softirq+0x1b7/0x7d4 [ 47.136105] [ 47.136317] Last potentially related work creation: [ 47.136905] kasan_save_stack+0x22/0x50 [ 47.137399] __kasan_record_aux_stack+0x8e/0xa0 [ 47.137972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.138612] remove_vma+0x139/0x170 [ 47.139058] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.139609] do_vmi_munmap+0x1f1/0x2b0 [ 47.140094] __vm_munmap+0x138/0x3a0 [ 47.140551] __x64_sys_munmap+0x59/0x80 [ 47.141040] do_syscall_64+0x3f/0x90 [ 47.141505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.142149] [ 47.142371] The buggy address belongs to the object at ffff88800d973000 [ 47.142371] which belongs to the cache vm_area_struct of size 168 [ 47.143841] The buggy address is located 88 bytes inside of [ 47.143841] freed 168-byte region [ffff88800d973000, ffff88800d9730a8) [ 47.145242] [ 47.145455] The buggy address belongs to the physical page: [ 47.146111] page:00000000b3da9fc5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd973 [ 47.147219] memcg:ffff888019ef1a01 [ 47.147645] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.148287] page_type: 0xffffffff() [ 47.148733] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.149640] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ef1a01 [ 47.150545] page dumped because: kasan: bad access detected [ 47.151210] [ 47.151422] Memory state around the buggy address: [ 47.151994] ffff88800d972f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 47.152837] ffff88800d972f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.153685] >ffff88800d973000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.154554] ^ [ 47.155277] ffff88800d973080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 47.156128] ffff88800d973100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.156972] ================================================================== [ 47.157939] Disabling lock debugging due to kernel taint [ 49.081006] BUG: Bad rss-counter state mm:00000000a7bb0bc2 type:MM_FILEPAGES val:33 [ 49.082185] BUG: Bad rss-counter state mm:00000000a7bb0bc2 type:MM_ANONPAGES val:22 [ 49.607185] BUG: Bad rss-counter state mm:00000000cf782f59 type:MM_FILEPAGES val:33 [ 49.608447] BUG: Bad rss-counter state mm:00000000cf782f59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24741' (ECDSA) to the list of known hosts. 2023/06/19 18:34:21 fuzzer started 2023/06/19 18:34:21 dialing manager at localhost:44161 2023/06/19 18:34:21 checking machine... 2023/06/19 18:34:21 checking revisions... [ 50.271504] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:34:21 testing simple program... [ 50.315170] cgroup: Unknown subsys name 'net' [ 50.352373] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:34:04 Registers: info registers vcpu 0 RAX=1ffff110018f6c13 RBX=ffff88800c7b6068 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800c7b6098 RBP=ffff88800c64e900 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800c6087e8 R14=ffffffff813782a8 R15=ffff88800c6087e8 RIP=ffffffff81846362 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 00007f1ffc3de900 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=00007fff7b391000 CR3=000000000de00000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f882d659000 CR3=000000000f8a4000 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=2030323a34333a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a34333a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000