syzkaller login: [ 38.729599] BUG: Bad rss-counter state mm:00000000955fa260 type:MM_FILEPAGES val:33 [ 38.730848] BUG: Bad rss-counter state mm:00000000955fa260 type:MM_ANONPAGES val:22 [ 38.874506] ================================================================== [ 38.875715] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.876919] Read of size 8 at addr ffff888014742ed8 by task sshd/219 [ 38.877813] [ 38.878067] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.879101] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.880245] Call Trace: [ 38.880620] [ 38.880952] dump_stack_lvl+0x91/0xf0 [ 38.881531] print_report+0xcc/0x620 [ 38.882093] ? __virt_addr_valid+0x102/0x340 [ 38.882747] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.883470] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884188] kasan_report+0xbe/0xf0 [ 38.884742] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885475] vma_interval_tree_remove+0xc75/0xec0 [ 38.886211] vma_prepare+0xc54/0x11a0 [ 38.886815] __split_vma+0x5af/0x950 [ 38.887385] ? __pfx___split_vma+0x10/0x10 [ 38.888020] ? find_held_lock+0x2c/0x110 [ 38.888643] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.889351] ? lock_is_held_type+0x9f/0x120 [ 38.890003] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.890755] ? mtree_range_walk+0x632/0x900 [ 38.891421] ? mas_walk+0x5c7/0x7c0 [ 38.892003] do_vmi_munmap+0x1f1/0x2b0 [ 38.892614] mmap_region+0x1f9/0x2660 [ 38.893207] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.893835] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.894714] ? __pfx_lock_acquire+0x10/0x10 [ 38.895353] ? __pfx_mmap_region+0x10/0x10 [ 38.895997] ? security_mmap_addr+0x7d/0xa0 [ 38.896634] ? get_unmapped_area+0x1f5/0x3f0 [ 38.897296] do_mmap+0x854/0xf00 [ 38.897829] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.898452] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.899138] ksys_mmap_pgoff+0x3af/0x500 [ 38.899745] do_syscall_64+0x3f/0x90 [ 38.900326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.901099] RIP: 0033:0x7f0fd7ee9d82 [ 38.901645] 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 [ 38.904238] RSP: 002b:00007fff5ac3e2a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.905324] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0fd7ee9d82 [ 38.906344] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0fd7323000 [ 38.907369] RBP: 00007f0fd7323000 R08: 0000000000000009 R09: 0000000000001000 [ 38.908385] R10: 0000000000000812 R11: 0000000000000206 R12: 000056233fc32b20 [ 38.909390] R13: 00007fff5ac3e2c0 R14: 00007fff5ac3e2f0 R15: 00007fff5ac3e650 [ 38.910444] [ 38.910795] [ 38.911056] Allocated by task 212: [ 38.911567] kasan_save_stack+0x22/0x50 [ 38.912172] kasan_set_track+0x25/0x30 [ 38.912766] __kasan_slab_alloc+0x59/0x70 [ 38.913414] kmem_cache_alloc+0x16b/0x370 [ 38.914036] vm_area_dup+0x20/0x160 [ 38.914601] __split_vma+0x170/0x950 [ 38.915158] split_vma+0xc6/0x110 [ 38.915674] mprotect_fixup+0x8d2/0xb30 [ 38.916265] do_mprotect_pkey+0x87e/0xd40 [ 38.916887] __x64_sys_mprotect+0x78/0xc0 [ 38.917502] do_syscall_64+0x3f/0x90 [ 38.918075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918856] [ 38.919114] Freed by task 212: [ 38.919573] kasan_save_stack+0x22/0x50 [ 38.920171] kasan_set_track+0x25/0x30 [ 38.920761] kasan_save_free_info+0x2b/0x50 [ 38.921392] __kasan_slab_free+0x10a/0x190 [ 38.922034] kmem_cache_free+0x10d/0x4d0 [ 38.922661] rcu_core+0x8c8/0x2860 [ 38.923187] __do_softirq+0x1b7/0x7d4 [ 38.923744] [ 38.924009] Last potentially related work creation: [ 38.924704] kasan_save_stack+0x22/0x50 [ 38.925299] __kasan_record_aux_stack+0x8e/0xa0 [ 38.925979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.926752] remove_vma+0x139/0x170 [ 38.927289] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.927955] do_vmi_munmap+0x1f1/0x2b0 [ 38.928547] __vm_munmap+0x138/0x3a0 [ 38.929100] __x64_sys_munmap+0x59/0x80 [ 38.929682] do_syscall_64+0x3f/0x90 [ 38.930243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.931039] [ 38.931292] The buggy address belongs to the object at ffff888014742e80 [ 38.931292] which belongs to the cache vm_area_struct of size 168 [ 38.933064] The buggy address is located 88 bytes inside of [ 38.933064] freed 168-byte region [ffff888014742e80, ffff888014742f28) [ 38.934734] [ 38.934989] The buggy address belongs to the physical page: [ 38.935777] page:000000000f23f2ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14742 [ 38.937079] memcg:ffff88800e57af01 [ 38.937580] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.938383] page_type: 0xffffffff() [ 38.938923] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.940018] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e57af01 [ 38.941106] page dumped because: kasan: bad access detected [ 38.941883] [ 38.942132] Memory state around the buggy address: [ 38.942840] ffff888014742d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.943838] ffff888014742e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.944844] >ffff888014742e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.945852] ^ [ 38.946719] ffff888014742f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.947742] ffff888014742f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.948739] ================================================================== [ 38.949845] Disabling lock debugging due to kernel taint [ 40.950787] BUG: Bad rss-counter state mm:000000007b7e6cff type:MM_FILEPAGES val:33 [ 40.951713] BUG: Bad rss-counter state mm:000000007b7e6cff type:MM_ANONPAGES val:22 [ 41.412244] BUG: Bad rss-counter state mm:00000000f6966107 type:MM_FILEPAGES val:33 [ 41.413201] BUG: Bad rss-counter state mm:00000000f6966107 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37347' (ECDSA) to the list of known hosts. 2023/06/21 07:53:05 fuzzer started 2023/06/21 07:53:06 dialing manager at localhost:36067 2023/06/21 07:53:06 checking machine... 2023/06/21 07:53:06 checking revisions... [ 42.139132] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:53:06 testing simple program... [ 42.183116] cgroup: Unknown subsys name 'net' [ 42.225465] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:53:05 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800e99cea0 RCX=ffffffff812e0126 RDX=ffffed1001d339d5 RSI=0000000000000004 RDI=ffff88800e99cea0 RBP=1ffff11001fa3f96 RSP=ffff88800fd1fc98 R8 =0000000000000001 R9 =ffffed1001d339d4 R10=ffff88800e99cea3 R11=0000000000000000 R12=ffff88800e99cea8 R13=ffff88800e99ceb0 R14=000000000c489007 R15=0000000019f05067 RIP=ffffffff8180f135 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 00007f33d730c900 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=0000562069775c9c CR3=000000000ee46000 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=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 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=00007f534870b150 CR3=000000000fcc8000 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=2035303a33353a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a33353a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000