syzkaller login: [ 30.773781] BUG: Bad rss-counter state mm:00000000ff80a2dd type:MM_FILEPAGES val:33 [ 30.775232] BUG: Bad rss-counter state mm:00000000ff80a2dd type:MM_ANONPAGES val:22 [ 30.939386] ================================================================== [ 30.940313] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.941262] Read of size 8 at addr ffff88800ee5f798 by task sshd/220 [ 30.942025] [ 30.942259] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.943305] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.944288] Call Trace: [ 30.944636] [ 30.944934] dump_stack_lvl+0x91/0xf0 [ 30.945440] print_report+0xcc/0x620 [ 30.945922] ? __virt_addr_valid+0x102/0x340 [ 30.946484] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.947098] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.947741] kasan_report+0xbe/0xf0 [ 30.948230] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.948864] vma_interval_tree_remove+0xc75/0xec0 [ 30.949476] vma_prepare+0xc54/0x11a0 [ 30.949961] __split_vma+0x5af/0x950 [ 30.950445] ? __pfx___split_vma+0x10/0x10 [ 30.950972] ? find_held_lock+0x2c/0x110 [ 30.951517] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.952081] ? lock_is_held_type+0x9f/0x120 [ 30.952638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.953266] ? mtree_range_walk+0x632/0x900 [ 30.953816] ? mas_walk+0x5c7/0x7c0 [ 30.954303] do_vmi_munmap+0x1f1/0x2b0 [ 30.954796] mmap_region+0x1f9/0x2660 [ 30.955303] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.955813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.956557] ? __pfx_lock_acquire+0x10/0x10 [ 30.957085] ? __pfx_mmap_region+0x10/0x10 [ 30.957632] ? security_mmap_addr+0x7d/0xa0 [ 30.958177] ? get_unmapped_area+0x1f5/0x3f0 [ 30.958731] do_mmap+0x854/0xf00 [ 30.959186] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.959693] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.960269] ksys_mmap_pgoff+0x3af/0x500 [ 30.960793] do_syscall_64+0x3f/0x90 [ 30.961294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.961938] RIP: 0033:0x7f098f64ed82 [ 30.962408] 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 [ 30.964581] RSP: 002b:00007fffc23dc5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.965508] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f098f64ed82 [ 30.966381] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f098ea88000 [ 30.967252] RBP: 00007f098ea88000 R08: 0000000000000009 R09: 0000000000001000 [ 30.968089] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c3a52dec0 [ 30.968968] R13: 00007fffc23dc610 R14: 00007fffc23dc640 R15: 00007fffc23dc9a0 [ 30.969841] [ 30.970146] [ 30.970378] Allocated by task 213: [ 30.970809] kasan_save_stack+0x22/0x50 [ 30.971348] kasan_set_track+0x25/0x30 [ 30.971851] __kasan_slab_alloc+0x59/0x70 [ 30.972415] kmem_cache_alloc+0x16b/0x370 [ 30.972947] vm_area_dup+0x20/0x160 [ 30.973423] __split_vma+0x170/0x950 [ 30.973885] split_vma+0xc6/0x110 [ 30.974348] mprotect_fixup+0x8d2/0xb30 [ 30.974851] do_mprotect_pkey+0x87e/0xd40 [ 30.975403] __x64_sys_mprotect+0x78/0xc0 [ 30.975929] do_syscall_64+0x3f/0x90 [ 30.976443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.977102] [ 30.977334] Freed by task 213: [ 30.977728] kasan_save_stack+0x22/0x50 [ 30.978254] kasan_set_track+0x25/0x30 [ 30.978750] kasan_save_free_info+0x2b/0x50 [ 30.979311] __kasan_slab_free+0x10a/0x190 [ 30.979845] kmem_cache_free+0x10d/0x4d0 [ 30.980388] rcu_core+0x8c8/0x2860 [ 30.980837] __do_softirq+0x1b7/0x7d4 [ 30.981328] [ 30.981542] Last potentially related work creation: [ 30.982133] kasan_save_stack+0x22/0x50 [ 30.982650] __kasan_record_aux_stack+0x8e/0xa0 [ 30.983253] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.983901] remove_vma+0x139/0x170 [ 30.984396] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.984946] do_vmi_munmap+0x1f1/0x2b0 [ 30.985454] __vm_munmap+0x138/0x3a0 [ 30.985920] __x64_sys_munmap+0x59/0x80 [ 30.986432] do_syscall_64+0x3f/0x90 [ 30.986906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.987588] [ 30.987802] The buggy address belongs to the object at ffff88800ee5f740 [ 30.987802] which belongs to the cache vm_area_struct of size 168 [ 30.989305] The buggy address is located 88 bytes inside of [ 30.989305] freed 168-byte region [ffff88800ee5f740, ffff88800ee5f7e8) [ 30.990722] [ 30.990941] The buggy address belongs to the physical page: [ 30.991621] page:00000000808b4c15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee5f [ 30.992737] memcg:ffff88800eec8701 [ 30.993182] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.993830] page_type: 0xffffffff() [ 30.994301] raw: 0100000000000200 ffff8880087a0c80 ffffea000038d480 dead000000000006 [ 30.995255] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eec8701 [ 30.996197] page dumped because: kasan: bad access detected [ 30.996870] [ 30.997081] Memory state around the buggy address: [ 30.997685] ffff88800ee5f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.998567] ffff88800ee5f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.999462] >ffff88800ee5f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.000333] ^ [ 31.000850] ffff88800ee5f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.001719] ffff88800ee5f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.002593] ================================================================== [ 31.003672] Disabling lock debugging due to kernel taint [ 32.665265] BUG: Bad rss-counter state mm:00000000d6dcef6c type:MM_FILEPAGES val:33 [ 32.666407] BUG: Bad rss-counter state mm:00000000d6dcef6c type:MM_ANONPAGES val:22 [ 33.223267] BUG: Bad rss-counter state mm:00000000cb74baa0 type:MM_FILEPAGES val:33 [ 33.224451] BUG: Bad rss-counter state mm:00000000cb74baa0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8487' (ECDSA) to the list of known hosts. 2023/06/20 22:52:41 fuzzer started 2023/06/20 22:52:42 dialing manager at localhost:36067 2023/06/20 22:52:42 checking machine... 2023/06/20 22:52:42 checking revisions... [ 33.883055] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:52:42 testing simple program... [ 33.937080] cgroup: Unknown subsys name 'net' [ 33.970935] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:52:41 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=00007f5be658f000 CR3=000000000ede4000 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=2031343a32353a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a32353a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000005b0 RBX=00000000000361a0 RCX=ffffffff8183095b RDX=ffffed1001b62134 RSI=0000000000000004 RDI=ffff88800db10998 RBP=ffff88800db10980 RSP=ffff88806cf09db0 R8 =0000000000000000 R9 =ffffed1001b62133 R10=ffff88800db1099b R11=00000000000b6d53 R12=0000000000000548 R13=ffffffff87b6a200 R14=ffff88800ef92580 R15=ffff88800db10998 RIP=ffffffff8180fed8 RFL=00000002 [-------] 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 00007fe79679a900 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=00007fe79730b3ec CR3=000000000e67c000 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=6720646572637465733a4d41503d706f 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