syzkaller login: [ 38.676100] BUG: Bad rss-counter state mm:00000000f92481f6 type:MM_FILEPAGES val:33 [ 38.677173] BUG: Bad rss-counter state mm:00000000f92481f6 type:MM_ANONPAGES val:22 [ 38.844124] ================================================================== [ 38.845076] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.846034] Read of size 8 at addr ffff888019c85d08 by task sshd/219 [ 38.846832] [ 38.847052] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.848061] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.849076] Call Trace: [ 38.849395] [ 38.849689] dump_stack_lvl+0x91/0xf0 [ 38.850212] print_report+0xcc/0x620 [ 38.850709] ? __virt_addr_valid+0x102/0x340 [ 38.851276] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.851910] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.852531] kasan_report+0xbe/0xf0 [ 38.853026] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.853659] vma_interval_tree_remove+0xc75/0xec0 [ 38.854267] vma_prepare+0xc54/0x11a0 [ 38.854759] __split_vma+0x5af/0x950 [ 38.855236] ? __pfx___split_vma+0x10/0x10 [ 38.855774] ? find_held_lock+0x2c/0x110 [ 38.856305] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.856894] ? lock_is_held_type+0x9f/0x120 [ 38.857435] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.858051] ? mtree_range_walk+0x632/0x900 [ 38.858615] ? mas_walk+0x5c7/0x7c0 [ 38.859096] do_vmi_munmap+0x1f1/0x2b0 [ 38.859595] mmap_region+0x1f9/0x2660 [ 38.860079] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.860618] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.861337] ? __pfx_lock_acquire+0x10/0x10 [ 38.861874] ? __pfx_mmap_region+0x10/0x10 [ 38.862405] ? security_mmap_addr+0x7d/0xa0 [ 38.862953] ? get_unmapped_area+0x1f5/0x3f0 [ 38.863522] do_mmap+0x854/0xf00 [ 38.863976] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.864479] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.865064] ksys_mmap_pgoff+0x3af/0x500 [ 38.865575] do_syscall_64+0x3f/0x90 [ 38.866062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.866708] RIP: 0033:0x7f3f136ead82 [ 38.867168] 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 [ 38.869337] RSP: 002b:00007fff512c9478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.870260] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f136ead82 [ 38.871114] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f12b24000 [ 38.871962] RBP: 00007f3f12b24000 R08: 0000000000000009 R09: 0000000000001000 [ 38.872827] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559359825ec0 [ 38.873680] R13: 00007fff512c9490 R14: 00007fff512c94c0 R15: 00007fff512c9820 [ 38.874549] [ 38.874844] [ 38.875063] Allocated by task 212: [ 38.875490] kasan_save_stack+0x22/0x50 [ 38.876001] kasan_set_track+0x25/0x30 [ 38.876497] __kasan_slab_alloc+0x59/0x70 [ 38.877032] kmem_cache_alloc+0x16b/0x370 [ 38.877550] vm_area_dup+0x20/0x160 [ 38.878011] __split_vma+0x170/0x950 [ 38.878485] split_vma+0xc6/0x110 [ 38.878926] mprotect_fixup+0x8d2/0xb30 [ 38.879434] do_mprotect_pkey+0x87e/0xd40 [ 38.879959] __x64_sys_mprotect+0x78/0xc0 [ 38.880480] do_syscall_64+0x3f/0x90 [ 38.880980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.881632] [ 38.881850] Freed by task 203: [ 38.882246] kasan_save_stack+0x22/0x50 [ 38.882750] kasan_set_track+0x25/0x30 [ 38.883244] kasan_save_free_info+0x2b/0x50 [ 38.883775] __kasan_slab_free+0x10a/0x190 [ 38.884309] kmem_cache_free+0x10d/0x4d0 [ 38.884834] rcu_core+0x8c8/0x2860 [ 38.885282] __do_softirq+0x1b7/0x7d4 [ 38.885759] [ 38.885974] Last potentially related work creation: [ 38.886569] kasan_save_stack+0x22/0x50 [ 38.887077] __kasan_record_aux_stack+0x8e/0xa0 [ 38.887649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.888291] remove_vma+0x139/0x170 [ 38.888754] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.889372] do_vmi_munmap+0x1f1/0x2b0 [ 38.889859] __vm_munmap+0x138/0x3a0 [ 38.890326] __x64_sys_munmap+0x59/0x80 [ 38.890831] do_syscall_64+0x3f/0x90 [ 38.891310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.891956] [ 38.892174] The buggy address belongs to the object at ffff888019c85cb0 [ 38.892174] which belongs to the cache vm_area_struct of size 168 [ 38.893664] The buggy address is located 88 bytes inside of [ 38.893664] freed 168-byte region [ffff888019c85cb0, ffff888019c85d58) [ 38.895073] [ 38.895295] The buggy address belongs to the physical page: [ 38.895971] page:0000000074ce0a24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c85 [ 38.897079] memcg:ffff88800dfa2e01 [ 38.897518] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.898167] page_type: 0xffffffff() [ 38.898619] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.899534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfa2e01 [ 38.900438] page dumped because: kasan: bad access detected [ 38.901113] [ 38.901331] Memory state around the buggy address: [ 38.901918] ffff888019c85c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.902779] ffff888019c85c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.903678] >ffff888019c85d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.904554] ^ [ 38.905018] ffff888019c85d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.905896] ffff888019c85e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.906745] ================================================================== [ 38.907807] Disabling lock debugging due to kernel taint [ 41.183071] BUG: Bad rss-counter state mm:00000000176a92ca type:MM_FILEPAGES val:33 [ 41.184269] BUG: Bad rss-counter state mm:00000000176a92ca type:MM_ANONPAGES val:22 [ 41.630685] BUG: Bad rss-counter state mm:00000000b8e931da type:MM_FILEPAGES val:33 [ 41.631681] BUG: Bad rss-counter state mm:00000000b8e931da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59615' (ECDSA) to the list of known hosts. 2023/06/21 00:41:42 fuzzer started 2023/06/21 00:41:43 dialing manager at localhost:36067 2023/06/21 00:41:43 checking machine... 2023/06/21 00:41:43 checking revisions... [ 42.365021] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:41:43 testing simple program... [ 42.436327] cgroup: Unknown subsys name 'net' [ 42.528107] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:41:42 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff85e0516c RCX=ffffffff8186d48d RDX=0000000000000003 RSI=ffffffff8614386c RDI=ffffffff85e0515c RBP=ffffffff85e0515c RSP=ffff888019e77928 R8 =ffffffff8614386c R9 =ffff888019e77a20 R10=0000000000038001 R11=00000000000229e6 R12=ffffffff85e05168 R13=ffffffff85e0515c R14=ffffffff85e0515c R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000213 [----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 00007f4f4d207900 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=00007ffd085ea000 CR3=000000001c91a000 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=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=00007f2e37234590 CR3=000000000c718000 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=274d13ff07c45589a2421979fd09f7ec XMM02=000000000011b268ec2efd57dc4c00df XMM03=0000000000121c084ffe696c108ef790 XMM04=7296e7271495813f00000000000ae988 XMM05=19e9129bd510f23500000000001320d8 XMM06=4fda316b135da52b0000000000131f60 XMM07=e042d86d42eb936e0000000000121ee0 XMM08=4ffe696c108ef790000000000011b2c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000