syzkaller login: [ 38.686096] BUG: Bad rss-counter state mm:000000003a0b5762 type:MM_FILEPAGES val:33 [ 38.688061] BUG: Bad rss-counter state mm:000000003a0b5762 type:MM_ANONPAGES val:22 [ 38.843839] ================================================================== [ 38.844755] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.845688] Read of size 8 at addr ffff88801a848880 by task sshd/219 [ 38.846480] [ 38.846770] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.847708] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.848680] Call Trace: [ 38.849003] [ 38.849314] dump_stack_lvl+0x91/0xf0 [ 38.849830] print_report+0xcc/0x620 [ 38.850317] ? __virt_addr_valid+0x102/0x340 [ 38.850865] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.851487] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.852101] kasan_report+0xbe/0xf0 [ 38.852577] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.853206] vma_interval_tree_remove+0xc75/0xec0 [ 38.853820] vma_prepare+0xc54/0x11a0 [ 38.854293] __split_vma+0x5af/0x950 [ 38.854776] ? __pfx___split_vma+0x10/0x10 [ 38.855302] ? find_held_lock+0x2c/0x110 [ 38.855821] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.856383] ? lock_is_held_type+0x9f/0x120 [ 38.856938] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.857549] ? mtree_range_walk+0x632/0x900 [ 38.858115] ? mas_walk+0x5c7/0x7c0 [ 38.858597] do_vmi_munmap+0x1f1/0x2b0 [ 38.859094] mmap_region+0x1f9/0x2660 [ 38.859575] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.860086] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.860799] ? __pfx_lock_acquire+0x10/0x10 [ 38.861331] ? __pfx_mmap_region+0x10/0x10 [ 38.861880] ? security_mmap_addr+0x7d/0xa0 [ 38.862416] ? get_unmapped_area+0x1f5/0x3f0 [ 38.862971] do_mmap+0x854/0xf00 [ 38.863412] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.863905] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.864465] ksys_mmap_pgoff+0x3af/0x500 [ 38.864975] do_syscall_64+0x3f/0x90 [ 38.865452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.866117] RIP: 0033:0x7fdc14e77d82 [ 38.866571] 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 [ 38.868680] RSP: 002b:00007ffe834bb798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.869586] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc14e77d82 [ 38.870446] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc142b1000 [ 38.871293] RBP: 00007fdc142b1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.872137] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fa21d3fec0 [ 38.872980] R13: 00007ffe834bb7b0 R14: 00007ffe834bb7e0 R15: 00007ffe834bbb40 [ 38.873856] [ 38.874149] [ 38.874365] Allocated by task 212: [ 38.874793] kasan_save_stack+0x22/0x50 [ 38.875298] kasan_set_track+0x25/0x30 [ 38.875791] __kasan_slab_alloc+0x59/0x70 [ 38.876317] kmem_cache_alloc+0x16b/0x370 [ 38.876837] vm_area_dup+0x20/0x160 [ 38.877298] __split_vma+0x170/0x950 [ 38.877771] split_vma+0xc6/0x110 [ 38.878209] mprotect_fixup+0x8d2/0xb30 [ 38.878714] do_mprotect_pkey+0x87e/0xd40 [ 38.879236] __x64_sys_mprotect+0x78/0xc0 [ 38.879763] do_syscall_64+0x3f/0x90 [ 38.880238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.880879] [ 38.881092] Freed by task 212: [ 38.881484] kasan_save_stack+0x22/0x50 [ 38.881997] kasan_set_track+0x25/0x30 [ 38.882489] kasan_save_free_info+0x2b/0x50 [ 38.883018] __kasan_slab_free+0x10a/0x190 [ 38.883560] kmem_cache_free+0x10d/0x4d0 [ 38.884069] rcu_core+0x8c8/0x2860 [ 38.884509] __do_softirq+0x1b7/0x7d4 [ 38.884994] [ 38.885210] Last potentially related work creation: [ 38.885812] kasan_save_stack+0x22/0x50 [ 38.886318] __kasan_record_aux_stack+0x8e/0xa0 [ 38.886894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.887531] remove_vma+0x139/0x170 [ 38.887982] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.888532] do_vmi_munmap+0x1f1/0x2b0 [ 38.889022] __vm_munmap+0x138/0x3a0 [ 38.889486] __x64_sys_munmap+0x59/0x80 [ 38.889993] do_syscall_64+0x3f/0x90 [ 38.890475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.891114] [ 38.891331] Second to last potentially related work creation: [ 38.892008] kasan_save_stack+0x22/0x50 [ 38.892509] __kasan_record_aux_stack+0x8e/0xa0 [ 38.893081] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.893755] remove_vma+0x139/0x170 [ 38.894215] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.894778] do_vmi_munmap+0x1f1/0x2b0 [ 38.895269] mmap_region+0x1f9/0x2660 [ 38.895757] do_mmap+0x854/0xf00 [ 38.896195] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.896681] ksys_mmap_pgoff+0x3af/0x500 [ 38.897186] do_syscall_64+0x3f/0x90 [ 38.897660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.898316] [ 38.898534] The buggy address belongs to the object at ffff88801a848828 [ 38.898534] which belongs to the cache vm_area_struct of size 168 [ 38.899997] The buggy address is located 88 bytes inside of [ 38.899997] freed 168-byte region [ffff88801a848828, ffff88801a8488d0) [ 38.901396] [ 38.901614] The buggy address belongs to the physical page: [ 38.902283] page:000000006223cb50 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a848 [ 38.903372] memcg:ffff888019f37a01 [ 38.903798] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.904444] page_type: 0xffffffff() [ 38.904896] raw: 0100000000000200 ffff8880087a0c80 ffffea00006a1000 0000000000000004 [ 38.905837] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f37a01 [ 38.906760] page dumped because: kasan: bad access detected [ 38.907416] [ 38.907635] Memory state around the buggy address: [ 38.908213] ffff88801a848780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.909066] ffff88801a848800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.909941] >ffff88801a848880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.910787] ^ [ 38.911210] ffff88801a848900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.912074] ffff88801a848980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 38.912916] ================================================================== [ 38.914089] Disabling lock debugging due to kernel taint [ 40.762821] BUG: Bad rss-counter state mm:00000000afcc5942 type:MM_FILEPAGES val:33 [ 40.763910] BUG: Bad rss-counter state mm:00000000afcc5942 type:MM_ANONPAGES val:22 [ 41.175422] BUG: Bad rss-counter state mm:000000001f7a501a type:MM_FILEPAGES val:33 [ 41.176195] BUG: Bad rss-counter state mm:000000001f7a501a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34488' (ECDSA) to the list of known hosts. 2023/06/21 06:44:22 fuzzer started 2023/06/21 06:44:23 dialing manager at localhost:36067 2023/06/21 06:44:23 checking machine... 2023/06/21 06:44:23 checking revisions... [ 41.810996] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:44:23 testing simple program... [ 41.852802] cgroup: Unknown subsys name 'net' [ 41.887454] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:44:22 Registers: info registers vcpu 0 RAX=ffffffff86138eb0 RBX=ffffffff85dfe038 RCX=ffffffff8180c704 RDX=0000000000000000 RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe038 RSP=ffff88806ce099f0 R8 =ffffffff86138eb0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe034 R13=ffffffff85dfe034 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb7 RFL=00000286 [--S--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 00007f86f4846900 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=00007ffc2f741000 CR3=000000001457a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800d5e0678 RBX=ffff888008e37dc8 RCX=1ffff11001abc0cf RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff888008e37dd8 RBP=0000000000000005 RSP=ffff888008e37d30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008e37dc8 R14=ffff88806cf35000 R15=ffff8880143f8ce8 RIP=ffffffff8137fcd4 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 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=00007f835afdb560 CR3=000000000c57e000 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=fc764330db0779963e432c84bad40577 XMM02=000000000011c2d0eff9b2d0a8fce9cb XMM03=000000000011c3a02c67c8bc2e329bc3 XMM04=7eaddaf5ac55a82f00000000000ae988 XMM05=19e9129bd510f2350000000000134340 XMM06=518439bbeb9e52f100000000001331a8 XMM07=e042d86d42eb936e0000000000122bf0 XMM08=8494787657731498000000000011c3a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000