syzkaller login: [ 158.115906] BUG: Bad rss-counter state mm:000000004bc776ca type:MM_FILEPAGES val:33 [ 158.117397] BUG: Bad rss-counter state mm:000000004bc776ca type:MM_ANONPAGES val:22 [ 158.287769] ================================================================== [ 158.288875] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 158.290016] Read of size 8 at addr ffff88800de2fdf0 by task sshd/219 [ 158.291014] [ 158.291234] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 158.292286] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 158.293304] Call Trace: [ 158.293641] [ 158.293924] dump_stack_lvl+0x91/0xf0 [ 158.294429] print_report+0xcc/0x620 [ 158.294910] ? __virt_addr_valid+0x102/0x340 [ 158.295469] ? vma_interval_tree_remove+0xc75/0xec0 [ 158.296116] ? vma_interval_tree_remove+0xc75/0xec0 [ 158.296730] kasan_report+0xbe/0xf0 [ 158.297215] ? vma_interval_tree_remove+0xc75/0xec0 [ 158.297846] vma_interval_tree_remove+0xc75/0xec0 [ 158.298463] vma_prepare+0xc54/0x11a0 [ 158.298940] __split_vma+0x5af/0x950 [ 158.299428] ? __pfx___split_vma+0x10/0x10 [ 158.299956] ? find_held_lock+0x2c/0x110 [ 158.300488] do_vmi_align_munmap+0x2ba/0x11f0 [ 158.301082] ? lock_is_held_type+0x9f/0x120 [ 158.301659] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 158.302283] ? mtree_range_walk+0x632/0x900 [ 158.302831] ? mas_walk+0x5c7/0x7c0 [ 158.303318] do_vmi_munmap+0x1f1/0x2b0 [ 158.303811] mmap_region+0x1f9/0x2660 [ 158.304309] ? vm_mmap_pgoff+0x15c/0x3a0 [ 158.304827] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 158.305549] ? __pfx_lock_acquire+0x10/0x10 [ 158.306132] ? __pfx_mmap_region+0x10/0x10 [ 158.306665] ? security_mmap_addr+0x7d/0xa0 [ 158.307209] ? get_unmapped_area+0x1f5/0x3f0 [ 158.307763] do_mmap+0x854/0xf00 [ 158.308219] vm_mmap_pgoff+0x1a6/0x3a0 [ 158.308716] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 158.309286] ksys_mmap_pgoff+0x3af/0x500 [ 158.309824] do_syscall_64+0x3f/0x90 [ 158.310314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 158.310976] RIP: 0033:0x7f86e7bb5d82 [ 158.311456] 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 [ 158.313633] RSP: 002b:00007fffa347ad18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 158.314551] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f86e7bb5d82 [ 158.315428] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f86e6fef000 [ 158.316297] RBP: 00007f86e6fef000 R08: 0000000000000009 R09: 0000000000001000 [ 158.317156] R10: 0000000000000812 R11: 0000000000000206 R12: 000055614d149ec0 [ 158.318024] R13: 00007fffa347ad30 R14: 00007fffa347ad60 R15: 00007fffa347b0c0 [ 158.318893] [ 158.319229] [ 158.319444] Allocated by task 212: [ 158.319872] kasan_save_stack+0x22/0x50 [ 158.320394] kasan_set_track+0x25/0x30 [ 158.320893] __kasan_slab_alloc+0x59/0x70 [ 158.321432] kmem_cache_alloc+0x16b/0x370 [ 158.321969] vm_area_dup+0x20/0x160 [ 158.322436] __split_vma+0x170/0x950 [ 158.322908] split_vma+0xc6/0x110 [ 158.323380] mprotect_fixup+0x8d2/0xb30 [ 158.323884] do_mprotect_pkey+0x87e/0xd40 [ 158.324418] __x64_sys_mprotect+0x78/0xc0 [ 158.324943] do_syscall_64+0x3f/0x90 [ 158.325431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 158.326109] [ 158.326337] Freed by task 212: [ 158.326730] kasan_save_stack+0x22/0x50 [ 158.327248] kasan_set_track+0x25/0x30 [ 158.327750] kasan_save_free_info+0x2b/0x50 [ 158.328309] __kasan_slab_free+0x10a/0x190 [ 158.328853] kmem_cache_free+0x10d/0x4d0 [ 158.329373] rcu_core+0x8c8/0x2860 [ 158.329839] __do_softirq+0x1b7/0x7d4 [ 158.330329] [ 158.330543] Last potentially related work creation: [ 158.331145] kasan_save_stack+0x22/0x50 [ 158.331652] __kasan_record_aux_stack+0x8e/0xa0 [ 158.332254] __call_rcu_common.constprop.0+0x6a/0xb90 [ 158.332897] remove_vma+0x139/0x170 [ 158.333361] do_vmi_align_munmap+0xd4a/0x11f0 [ 158.333945] do_vmi_munmap+0x1f1/0x2b0 [ 158.334448] __vm_munmap+0x138/0x3a0 [ 158.335070] __x64_sys_munmap+0x59/0x80 [ 158.335755] do_syscall_64+0x3f/0x90 [ 158.336397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 158.337258] [ 158.337478] The buggy address belongs to the object at ffff88800de2fd98 [ 158.337478] which belongs to the cache vm_area_struct of size 168 [ 158.339024] The buggy address is located 88 bytes inside of [ 158.339024] freed 168-byte region [ffff88800de2fd98, ffff88800de2fe40) [ 158.340530] [ 158.340745] The buggy address belongs to the physical page: [ 158.341417] page:0000000001fd8983 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde2f [ 158.342552] memcg:ffff888013469f01 [ 158.342993] flags: 0x100000000000200(slab|node=0|zone=1) [ 158.343639] page_type: 0xffffffff() [ 158.344116] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 158.345042] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013469f01 [ 158.345966] page dumped because: kasan: bad access detected [ 158.346633] [ 158.346846] Memory state around the buggy address: [ 158.347438] ffff88800de2fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 158.348309] ffff88800de2fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 158.349191] >ffff88800de2fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 158.350077] ^ [ 158.350889] ffff88800de2fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 158.351767] ffff88800de2fe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 158.352625] ================================================================== [ 158.353838] Disabling lock debugging due to kernel taint [ 160.692081] BUG: Bad rss-counter state mm:00000000f0240d9f type:MM_FILEPAGES val:32 [ 160.693260] BUG: Bad rss-counter state mm:00000000f0240d9f type:MM_ANONPAGES val:22 [ 161.200854] BUG: Bad rss-counter state mm:000000009852d4ea type:MM_FILEPAGES val:33 [ 161.202373] BUG: Bad rss-counter state mm:000000009852d4ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63557' (ECDSA) to the list of known hosts. 2023/06/20 01:06:09 fuzzer started 2023/06/20 01:06:09 dialing manager at localhost:44161 2023/06/20 01:06:09 checking machine... 2023/06/20 01:06:09 checking revisions... [ 162.000231] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:06:09 testing simple program... [ 162.048512] cgroup: Unknown subsys name 'net' [ 162.090746] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:04:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c1380 RSI=ffffffff84531da7 RDI=ffff88806ce09b6c RBP=ffff88806ce09c00 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800d8c5080 RIP=ffffffff813ad4f7 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 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=00007fcd4f0be4b0 CR3=000000000c6a8000 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=2038303a36303a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a36303a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800fd8f4b0 RCX=0000000000000001 RDX=1ffff11001fb1e98 RSI=ffff88800fd8f7f8 RDI=ffff88800fd8f4c0 RBP=ffff88800fd8f7f8 RSP=ffff88800fd8f408 R8 =0000000000000001 R9 =ffff88800fd8f4f0 R10=0000000000038001 R11=00000000000b3b3c R12=0000000000000008 R13=ffff88800fd88000 R14=ffff88800fd8f7f8 R15=ffff88800fd8f4b0 RIP=ffffffff81130468 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 00007ff1cb383900 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=00007ff1cb343008 CR3=0000000016f12000 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=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