syzkaller login: [ 31.014019] BUG: Bad rss-counter state mm:0000000025b191f2 type:MM_FILEPAGES val:33 [ 31.015756] BUG: Bad rss-counter state mm:0000000025b191f2 type:MM_ANONPAGES val:22 [ 31.195362] ================================================================== [ 31.196390] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.197426] Read of size 8 at addr ffff888014602ed8 by task sshd/221 [ 31.198419] [ 31.198654] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.199630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.200684] Call Trace: [ 31.201029] [ 31.201337] dump_stack_lvl+0x91/0xf0 [ 31.201866] print_report+0xcc/0x620 [ 31.202386] ? __virt_addr_valid+0x102/0x340 [ 31.202975] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.203645] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204308] kasan_report+0xbe/0xf0 [ 31.204813] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205472] vma_interval_tree_remove+0xc75/0xec0 [ 31.206116] vma_prepare+0xc54/0x11a0 [ 31.206634] __split_vma+0x5af/0x950 [ 31.207134] ? __pfx___split_vma+0x10/0x10 [ 31.207777] ? find_held_lock+0x2c/0x110 [ 31.208348] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.208960] ? lock_is_held_type+0x9f/0x120 [ 31.209540] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.210187] ? mtree_range_walk+0x632/0x900 [ 31.210769] ? mas_walk+0x5c7/0x7c0 [ 31.211271] do_vmi_munmap+0x1f1/0x2b0 [ 31.211830] mmap_region+0x1f9/0x2660 [ 31.212347] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.212884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.213663] ? __pfx_lock_acquire+0x10/0x10 [ 31.214253] ? __pfx_mmap_region+0x10/0x10 [ 31.214832] ? security_mmap_addr+0x7d/0xa0 [ 31.215414] ? get_unmapped_area+0x1f5/0x3f0 [ 31.216029] do_mmap+0x854/0xf00 [ 31.216514] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.217060] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.217673] ksys_mmap_pgoff+0x3af/0x500 [ 31.218213] do_syscall_64+0x3f/0x90 [ 31.218727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219408] RIP: 0033:0x7f50a5881d82 [ 31.219900] 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 [ 31.222135] RSP: 002b:00007ffda03a6058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.223116] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f50a5881d82 [ 31.224062] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f50a4cbb000 [ 31.224967] RBP: 00007f50a4cbb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.225864] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a3cc04ec0 [ 31.226761] R13: 00007ffda03a6070 R14: 00007ffda03a60a0 R15: 00007ffda03a6400 [ 31.227683] [ 31.228005] [ 31.228246] Allocated by task 214: [ 31.228718] kasan_save_stack+0x22/0x50 [ 31.229284] kasan_set_track+0x25/0x30 [ 31.229836] __kasan_slab_alloc+0x59/0x70 [ 31.230409] kmem_cache_alloc+0x16b/0x370 [ 31.230984] vm_area_dup+0x20/0x160 [ 31.231489] __split_vma+0x170/0x950 [ 31.232001] split_vma+0xc6/0x110 [ 31.232479] mprotect_fixup+0x8d2/0xb30 [ 31.233023] do_mprotect_pkey+0x87e/0xd40 [ 31.233591] __x64_sys_mprotect+0x78/0xc0 [ 31.234159] do_syscall_64+0x3f/0x90 [ 31.234680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.235393] [ 31.235645] Freed by task 214: [ 31.236081] kasan_save_stack+0x22/0x50 [ 31.236623] kasan_set_track+0x25/0x30 [ 31.237153] kasan_save_free_info+0x2b/0x50 [ 31.237725] __kasan_slab_free+0x10a/0x190 [ 31.238297] kmem_cache_free+0x10d/0x4d0 [ 31.238839] rcu_core+0x8c8/0x2860 [ 31.239309] __do_softirq+0x1b7/0x7d4 [ 31.239906] [ 31.240141] Last potentially related work creation: [ 31.240765] kasan_save_stack+0x22/0x50 [ 31.241318] __kasan_record_aux_stack+0x8e/0xa0 [ 31.241949] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.242652] remove_vma+0x139/0x170 [ 31.243149] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.243783] do_vmi_munmap+0x1f1/0x2b0 [ 31.244315] __vm_munmap+0x138/0x3a0 [ 31.244827] __x64_sys_munmap+0x59/0x80 [ 31.245372] do_syscall_64+0x3f/0x90 [ 31.245906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.246625] [ 31.246853] Second to last potentially related work creation: [ 31.247594] kasan_save_stack+0x22/0x50 [ 31.248140] __kasan_record_aux_stack+0x8e/0xa0 [ 31.248750] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.249465] remove_vma+0x139/0x170 [ 31.249954] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.250555] do_vmi_munmap+0x1f1/0x2b0 [ 31.251074] mmap_region+0x1f9/0x2660 [ 31.251594] do_mmap+0x854/0xf00 [ 31.252066] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.252588] ksys_mmap_pgoff+0x3af/0x500 [ 31.253138] do_syscall_64+0x3f/0x90 [ 31.253655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.254347] [ 31.254579] The buggy address belongs to the object at ffff888014602e80 [ 31.254579] which belongs to the cache vm_area_struct of size 168 [ 31.256183] The buggy address is located 88 bytes inside of [ 31.256183] freed 168-byte region [ffff888014602e80, ffff888014602f28) [ 31.257694] [ 31.257928] The buggy address belongs to the physical page: [ 31.258664] page:000000000375d654 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14602 [ 31.259893] memcg:ffff888018c08801 [ 31.260361] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.261059] page_type: 0xffffffff() [ 31.261540] raw: 0100000000000200 ffff8880087a0c80 ffffea000063f8c0 dead000000000002 [ 31.262521] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c08801 [ 31.263486] page dumped because: kasan: bad access detected [ 31.264189] [ 31.264417] Memory state around the buggy address: [ 31.265039] ffff888014602d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.265948] ffff888014602e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.266867] >ffff888014602e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.267787] ^ [ 31.268558] ffff888014602f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.269477] ffff888014602f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.270389] ================================================================== [ 31.271448] Disabling lock debugging due to kernel taint [ 33.364672] BUG: Bad rss-counter state mm:0000000067a18544 type:MM_FILEPAGES val:33 [ 33.365616] BUG: Bad rss-counter state mm:0000000067a18544 type:MM_ANONPAGES val:22 [ 33.926515] BUG: Bad rss-counter state mm:00000000819f073e type:MM_FILEPAGES val:33 [ 33.927812] BUG: Bad rss-counter state mm:00000000819f073e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19287' (ECDSA) to the list of known hosts. 2023/06/20 19:16:38 fuzzer started 2023/06/20 19:16:38 dialing manager at localhost:36067 2023/06/20 19:16:38 checking machine... 2023/06/20 19:16:38 checking revisions... [ 34.584435] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:16:38 testing simple program... [ 34.627883] cgroup: Unknown subsys name 'net' [ 34.688469] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:16:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018e2e41c RCX=dffffc0000000000 RDX=dffffc0000000000 RSI=ffffffff844a4f30 RDI=0000000000000005 RBP=ffff888017deac50 RSP=ffff888019ef7ce8 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000003 R11=0000000000000000 R12=0000000000000002 R13=ffff8880161b6600 R14=00007fe5c22a3000 R15=ffffffffffffffff RIP=ffffffff844a4f7b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe5c1edd900 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=00007ffe3c230000 CR3=000000001c5c8000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=9f4653a583134b24b810c22449c86fc1 XMM05=00000000000000000000000000000000 XMM06=7346536363134b247310722049736f3d XMM07=672065736f6c635f6e6f69737365733a 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=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=00007f7d96f1d820 CR3=000000000d98a000 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=23204c5c51586d87ff4dc264e52a9314 XMM02=000000000011b8e0ec2efd57dc4c00df XMM03=0000000000122da0665031d24883312a XMM04=a4507d7124d9f0a900000000000ae988 XMM05=b04e32c7fa405dfc0000000000134d80 XMM06=c291bd5c70af25b90000000000133e20 XMM07=e042d86d42eb936e0000000000123020 XMM08=665031d24883312a000000000011b940 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000