[ 24.100726] BUG: Bad rss-counter state mm:000000006b4faa88 type:MM_FILEPAGES val:33 [ 24.101961] BUG: Bad rss-counter state mm:000000006b4faa88 type:MM_ANONPAGES val:22 [ 24.143816] ================================================================== [ 24.144775] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.145720] Read of size 8 at addr ffff88801bc49c20 by task sshd/219 [ 24.146496] [ 24.146715] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.147602] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.148609] Call Trace: [ 24.148937] [ 24.149221] dump_stack_lvl+0x91/0xf0 [ 24.149736] print_report+0xcc/0x620 [ 24.150234] ? __virt_addr_valid+0x102/0x340 [ 24.150805] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.151434] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.152063] kasan_report+0xbe/0xf0 [ 24.152575] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.153209] vma_interval_tree_remove+0xc75/0xec0 [ 24.153812] vma_prepare+0xc54/0x11a0 [ 24.154303] __split_vma+0x5af/0x950 [ 24.154781] ? __pfx___split_vma+0x10/0x10 [ 24.155319] ? find_held_lock+0x2c/0x110 [ 24.155855] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.156439] ? lock_is_held_type+0x9f/0x120 [ 24.156980] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.157606] ? mtree_range_walk+0x632/0x900 [ 24.158166] ? mas_walk+0x5c7/0x7c0 [ 24.158643] do_vmi_munmap+0x1f1/0x2b0 [ 24.159135] mmap_region+0x1f9/0x2660 [ 24.159618] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.160129] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.160868] ? __pfx_lock_acquire+0x10/0x10 [ 24.161417] ? __pfx_mmap_region+0x10/0x10 [ 24.161951] ? security_mmap_addr+0x7d/0xa0 [ 24.162489] ? get_unmapped_area+0x1f5/0x3f0 [ 24.163050] do_mmap+0x854/0xf00 [ 24.163491] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.163987] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.164561] ksys_mmap_pgoff+0x3af/0x500 [ 24.165075] do_syscall_64+0x3f/0x90 [ 24.165564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.166234] RIP: 0033:0x7f30ce827d82 [ 24.166700] 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 [ 24.168898] RSP: 002b:00007ffd5484ac88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.169825] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f30ce827d82 [ 24.170682] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f30cdc61000 [ 24.171691] RBP: 00007f30cdc61000 R08: 0000000000000009 R09: 0000000000001000 [ 24.172561] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec1685c980 [ 24.173406] R13: 00007ffd5484aca0 R14: 00007ffd5484acd0 R15: 00007ffd5484b030 [ 24.174261] [ 24.174554] [ 24.174768] Allocated by task 211: [ 24.175196] kasan_save_stack+0x22/0x50 [ 24.175701] kasan_set_track+0x25/0x30 [ 24.176206] __kasan_slab_alloc+0x59/0x70 [ 24.176741] kmem_cache_alloc+0x16b/0x370 [ 24.177266] vm_area_dup+0x20/0x160 [ 24.177725] __split_vma+0x170/0x950 [ 24.178196] split_vma+0xc6/0x110 [ 24.178644] mprotect_fixup+0x8d2/0xb30 [ 24.179145] do_mprotect_pkey+0x87e/0xd40 [ 24.179680] __x64_sys_mprotect+0x78/0xc0 [ 24.180223] do_syscall_64+0x3f/0x90 [ 24.180697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.181344] [ 24.181562] Freed by task 211: [ 24.181959] kasan_save_stack+0x22/0x50 [ 24.182467] kasan_set_track+0x25/0x30 [ 24.182967] kasan_save_free_info+0x2b/0x50 [ 24.183505] __kasan_slab_free+0x10a/0x190 [ 24.184045] kmem_cache_free+0x10d/0x4d0 [ 24.184574] rcu_core+0x8c8/0x2860 [ 24.185018] __do_softirq+0x1b7/0x7d4 [ 24.185504] [ 24.185717] Last potentially related work creation: [ 24.186299] kasan_save_stack+0x22/0x50 [ 24.186806] __kasan_record_aux_stack+0x8e/0xa0 [ 24.187384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.188035] remove_vma+0x139/0x170 [ 24.188508] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.189063] do_vmi_munmap+0x1f1/0x2b0 [ 24.189547] __vm_munmap+0x138/0x3a0 [ 24.190013] __x64_sys_munmap+0x59/0x80 [ 24.190508] do_syscall_64+0x3f/0x90 [ 24.190982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.191630] [ 24.191848] The buggy address belongs to the object at ffff88801bc49bc8 [ 24.191848] which belongs to the cache vm_area_struct of size 168 [ 24.193330] The buggy address is located 88 bytes inside of [ 24.193330] freed 168-byte region [ffff88801bc49bc8, ffff88801bc49c70) [ 24.194753] [ 24.194971] The buggy address belongs to the physical page: [ 24.195626] page:000000001dc81ce4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc49 [ 24.196746] memcg:ffff88801bc3c301 [ 24.197171] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.197830] page_type: 0xffffffff() [ 24.198281] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.199197] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc3c301 [ 24.200107] page dumped because: kasan: bad access detected [ 24.200784] [ 24.201001] Memory state around the buggy address: [ 24.201581] ffff88801bc49b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.202440] ffff88801bc49b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.203292] >ffff88801bc49c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.204145] ^ [ 24.204690] ffff88801bc49c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.205549] ffff88801bc49d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.206403] ================================================================== [ 24.207828] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.748883] BUG: Bad rss-counter state mm:00000000053ff1b2 type:MM_FILEPAGES val:33 [ 26.750069] BUG: Bad rss-counter state mm:00000000053ff1b2 type:MM_ANONPAGES val:22 [ 27.164572] BUG: Bad rss-counter state mm:0000000016ba3e96 type:MM_FILEPAGES val:33 [ 27.165312] BUG: Bad rss-counter state mm:0000000016ba3e96 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18323' (ECDSA) to the list of known hosts. 2023/06/20 17:05:57 fuzzer started 2023/06/20 17:05:57 dialing manager at localhost:36067 2023/06/20 17:05:57 checking machine... 2023/06/20 17:05:57 checking revisions... [ 27.818500] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:05:57 testing simple program... [ 27.864842] cgroup: Unknown subsys name 'net' [ 27.911705] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:05:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f04ecfd9dd0 CR3=000000000d4aa000 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=00000000000000000000000000000000 XMM01=456747e7bccd94bfac4544d4ec31df22 XMM02=2c67c8bc2e329bc3000000000011a3b0 XMM03=fb795ef6d65770560000000000120dc8 XMM04=9d2ae0e58f9d8b2500000000000ae988 XMM05=dfcdbad4f1609c370000000000130c60 XMM06=806171799158d9670000000000130ae8 XMM07=e042d86d42eb936e0000000000121048 XMM08=46c97421bbefe5aa000000000011a410 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800c677400 RBX=0000000000000001 RCX=ffffffff844a5103 RDX=ffff888019d59b40 RSI=0000000000000001 RDI=0000000000000003 RBP=ffff88800c677408 RSP=ffff88800ffc7c98 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=0000000000000000 R12=0000000000000004 R13=ffff8880161de600 R14=00007f8aa14d6000 R15=00007f8aa14effff RIP=ffffffff814c0408 RFL=00000293 [--S-A-C] 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 00007f8aa1512900 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=00007f8aa14f1020 CR3=000000000ea6a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000