syzkaller login: [ 30.660247] BUG: Bad rss-counter state mm:000000004fb804ff type:MM_FILEPAGES val:33 [ 30.661372] BUG: Bad rss-counter state mm:000000004fb804ff type:MM_ANONPAGES val:22 [ 30.817514] ================================================================== [ 30.818492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.819493] Read of size 8 at addr ffff88800d014798 by task sshd/219 [ 30.820444] [ 30.820715] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.821758] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.822958] Call Trace: [ 30.823343] [ 30.823683] dump_stack_lvl+0x91/0xf0 [ 30.824295] print_report+0xcc/0x620 [ 30.824870] ? __virt_addr_valid+0x102/0x340 [ 30.825534] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.826263] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.827004] kasan_report+0xbe/0xf0 [ 30.827562] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.828330] vma_interval_tree_remove+0xc75/0xec0 [ 30.829057] vma_prepare+0xc54/0x11a0 [ 30.829626] __split_vma+0x5af/0x950 [ 30.830188] ? __pfx___split_vma+0x10/0x10 [ 30.830819] ? find_held_lock+0x2c/0x110 [ 30.831439] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.832131] ? lock_is_held_type+0x9f/0x120 [ 30.832776] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.833495] ? mtree_range_walk+0x632/0x900 [ 30.834157] ? mas_walk+0x5c7/0x7c0 [ 30.834716] do_vmi_munmap+0x1f1/0x2b0 [ 30.835270] mmap_region+0x1f9/0x2660 [ 30.835782] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.836409] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.837243] ? __pfx_lock_acquire+0x10/0x10 [ 30.837798] ? __pfx_mmap_region+0x10/0x10 [ 30.838350] ? security_mmap_addr+0x7d/0xa0 [ 30.838893] ? get_unmapped_area+0x1f5/0x3f0 [ 30.839453] do_mmap+0x854/0xf00 [ 30.839921] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.840416] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.840990] ksys_mmap_pgoff+0x3af/0x500 [ 30.841497] do_syscall_64+0x3f/0x90 [ 30.841977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.842624] RIP: 0033:0x7fbe37796d82 [ 30.843108] 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 [ 30.845243] RSP: 002b:00007fff24900ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.846159] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe37796d82 [ 30.847028] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe36bd0000 [ 30.847890] RBP: 00007fbe36bd0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.848741] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557743f05d90 [ 30.849584] R13: 00007fff24900ad0 R14: 00007fff24900b00 R15: 00007fff24900e60 [ 30.850454] [ 30.850748] [ 30.850961] Allocated by task 212: [ 30.851396] kasan_save_stack+0x22/0x50 [ 30.851907] kasan_set_track+0x25/0x30 [ 30.852405] __kasan_slab_alloc+0x59/0x70 [ 30.852926] kmem_cache_alloc+0x16b/0x370 [ 30.853439] vm_area_dup+0x20/0x160 [ 30.853902] __split_vma+0x170/0x950 [ 30.854388] split_vma+0xc6/0x110 [ 30.854830] mprotect_fixup+0x8d2/0xb30 [ 30.855346] do_mprotect_pkey+0x87e/0xd40 [ 30.855892] __x64_sys_mprotect+0x78/0xc0 [ 30.856415] do_syscall_64+0x3f/0x90 [ 30.856896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857543] [ 30.857757] Freed by task 202: [ 30.858143] kasan_save_stack+0x22/0x50 [ 30.858660] kasan_set_track+0x25/0x30 [ 30.859170] kasan_save_free_info+0x2b/0x50 [ 30.859712] __kasan_slab_free+0x10a/0x190 [ 30.860267] kmem_cache_free+0x10d/0x4d0 [ 30.860769] rcu_core+0x8c8/0x2860 [ 30.861211] __do_softirq+0x1b7/0x7d4 [ 30.861684] [ 30.861899] Last potentially related work creation: [ 30.862493] kasan_save_stack+0x22/0x50 [ 30.862999] __kasan_record_aux_stack+0x8e/0xa0 [ 30.863578] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.864227] remove_vma+0x139/0x170 [ 30.864689] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.865248] do_vmi_munmap+0x1f1/0x2b0 [ 30.865741] __vm_munmap+0x138/0x3a0 [ 30.866214] __x64_sys_munmap+0x59/0x80 [ 30.866706] do_syscall_64+0x3f/0x90 [ 30.867182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867823] [ 30.868055] The buggy address belongs to the object at ffff88800d014740 [ 30.868055] which belongs to the cache vm_area_struct of size 168 [ 30.869509] The buggy address is located 88 bytes inside of [ 30.869509] freed 168-byte region [ffff88800d014740, ffff88800d0147e8) [ 30.870936] [ 30.871154] The buggy address belongs to the physical page: [ 30.871815] page:00000000c066513c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd014 [ 30.872897] memcg:ffff88800ef04901 [ 30.873326] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.873965] page_type: 0xffffffff() [ 30.874422] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.875336] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef04901 [ 30.876253] page dumped because: kasan: bad access detected [ 30.876904] [ 30.877121] Memory state around the buggy address: [ 30.877695] ffff88800d014680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.878539] ffff88800d014700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.879394] >ffff88800d014780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.880249] ^ [ 30.880741] ffff88800d014800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.881594] ffff88800d014880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.882430] ================================================================== [ 30.883394] Disabling lock debugging due to kernel taint [ 32.714218] BUG: Bad rss-counter state mm:000000002f4b5991 type:MM_FILEPAGES val:33 [ 32.715003] BUG: Bad rss-counter state mm:000000002f4b5991 type:MM_ANONPAGES val:22 [ 33.091798] BUG: Bad rss-counter state mm:00000000230a8432 type:MM_FILEPAGES val:33 [ 33.092553] BUG: Bad rss-counter state mm:00000000230a8432 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43612' (ECDSA) to the list of known hosts. 2023/06/20 12:58:17 fuzzer started 2023/06/20 12:58:17 dialing manager at localhost:36067 2023/06/20 12:58:17 checking machine... 2023/06/20 12:58:17 checking revisions... [ 33.714411] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:58:17 testing simple program... [ 33.751490] cgroup: Unknown subsys name 'net' [ 33.786298] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:58:17 Registers: info registers vcpu 0 RAX=1ffffffff0c09511 RBX=ffffffff8604a88c RCX=ffffffff844c7d8d RDX=0000000000000000 RSI=ffffffff864abb34 RDI=ffffffff8604a88c RBP=ffffffff8604a88c RSP=ffff888017deefb0 R8 =ffffffff864abb34 R9 =ffff888017def0a8 R10=0000000000038001 R11=00000000000b3fb2 R12=ffffffff8604a88c R13=ffffffff8604a88c R14=ffffffff8604a88c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f558926b900 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=0000557e4f1eab88 CR3=0000000018df2000 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=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 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=00007faa0c5bb7f0 CR3=000000000ec16000 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=2036313a38353a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a38353a3231203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000