syzkaller login: [ 30.763043] BUG: Bad rss-counter state mm:00000000c905861c type:MM_FILEPAGES val:33 [ 30.763965] BUG: Bad rss-counter state mm:00000000c905861c type:MM_ANONPAGES val:22 [ 30.865437] ================================================================== [ 30.866125] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.866753] Read of size 8 at addr ffff888014772b38 by task sshd/220 [ 30.867309] [ 30.867456] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.868042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.868699] Call Trace: [ 30.868924] [ 30.869130] dump_stack_lvl+0x91/0xf0 [ 30.869467] print_report+0xcc/0x620 [ 30.870094] ? __virt_addr_valid+0x102/0x340 [ 30.870486] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.870892] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.871321] kasan_report+0xbe/0xf0 [ 30.871643] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.872067] vma_interval_tree_remove+0xc75/0xec0 [ 30.872483] vma_prepare+0xc54/0x11a0 [ 30.872798] __split_vma+0x5af/0x950 [ 30.873109] ? __pfx___split_vma+0x10/0x10 [ 30.873450] ? find_held_lock+0x2c/0x110 [ 30.873796] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.874183] ? lock_is_held_type+0x9f/0x120 [ 30.874543] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.874956] ? mtree_range_walk+0x632/0x900 [ 30.875371] ? mas_walk+0x5c7/0x7c0 [ 30.875694] do_vmi_munmap+0x1f1/0x2b0 [ 30.876023] mmap_region+0x1f9/0x2660 [ 30.876330] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.876667] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.877152] ? __pfx_lock_acquire+0x10/0x10 [ 30.877516] ? __pfx_mmap_region+0x10/0x10 [ 30.877872] ? security_mmap_addr+0x7d/0xa0 [ 30.878250] ? get_unmapped_area+0x1f5/0x3f0 [ 30.878618] do_mmap+0x854/0xf00 [ 30.878915] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.879359] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.879725] ksys_mmap_pgoff+0x3af/0x500 [ 30.880063] do_syscall_64+0x3f/0x90 [ 30.880384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.880822] RIP: 0033:0x7fedc11a7d82 [ 30.881183] 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 [ 30.882640] RSP: 002b:00007ffc5c815148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.883266] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fedc11a7d82 [ 30.883830] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fedc05e1000 [ 30.884390] RBP: 00007fedc05e1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.884957] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570a3189980 [ 30.885517] R13: 00007ffc5c815160 R14: 00007ffc5c815190 R15: 00007ffc5c8154f0 [ 30.886084] [ 30.886274] [ 30.886416] Allocated by task 213: [ 30.886705] kasan_save_stack+0x22/0x50 [ 30.887101] kasan_set_track+0x25/0x30 [ 30.887467] __kasan_slab_alloc+0x59/0x70 [ 30.887822] kmem_cache_alloc+0x16b/0x370 [ 30.888214] vm_area_dup+0x20/0x160 [ 30.888541] __split_vma+0x170/0x950 [ 30.888863] split_vma+0xc6/0x110 [ 30.889192] mprotect_fixup+0x8d2/0xb30 [ 30.889526] do_mprotect_pkey+0x87e/0xd40 [ 30.889882] __x64_sys_mprotect+0x78/0xc0 [ 30.890248] do_syscall_64+0x3f/0x90 [ 30.890572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.891022] [ 30.891240] Freed by task 213: [ 30.891519] kasan_save_stack+0x22/0x50 [ 30.891860] kasan_set_track+0x25/0x30 [ 30.892197] kasan_save_free_info+0x2b/0x50 [ 30.892550] __kasan_slab_free+0x10a/0x190 [ 30.892906] kmem_cache_free+0x10d/0x4d0 [ 30.893269] rcu_core+0x8c8/0x2860 [ 30.893584] __do_softirq+0x1b7/0x7d4 [ 30.893915] [ 30.894070] Last potentially related work creation: [ 30.894469] kasan_save_stack+0x22/0x50 [ 30.894812] __kasan_record_aux_stack+0x8e/0xa0 [ 30.895187] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.895594] remove_vma+0x139/0x170 [ 30.895879] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.896252] do_vmi_munmap+0x1f1/0x2b0 [ 30.896569] __vm_munmap+0x138/0x3a0 [ 30.896885] __x64_sys_munmap+0x59/0x80 [ 30.897234] do_syscall_64+0x3f/0x90 [ 30.897559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.897996] [ 30.898152] The buggy address belongs to the object at ffff888014772ae0 [ 30.898152] which belongs to the cache vm_area_struct of size 168 [ 30.899213] The buggy address is located 88 bytes inside of [ 30.899213] freed 168-byte region [ffff888014772ae0, ffff888014772b88) [ 30.900123] [ 30.900263] The buggy address belongs to the physical page: [ 30.900688] page:00000000c7e02de0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14772 [ 30.901478] memcg:ffff8880090a4701 [ 30.901766] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.902231] page_type: 0xffffffff() [ 30.902535] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.903233] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880090a4701 [ 30.903828] page dumped because: kasan: bad access detected [ 30.904292] [ 30.904431] Memory state around the buggy address: [ 30.904818] ffff888014772a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.905417] ffff888014772a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.906010] >ffff888014772b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.906568] ^ [ 30.906985] ffff888014772b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.907599] ffff888014772c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.908183] ================================================================== [ 30.908828] Disabling lock debugging due to kernel taint [ 32.459827] BUG: Bad rss-counter state mm:0000000076966bd8 type:MM_FILEPAGES val:33 [ 32.460521] BUG: Bad rss-counter state mm:0000000076966bd8 type:MM_ANONPAGES val:22 [ 32.822611] BUG: Bad rss-counter state mm:000000004ad2b0bf type:MM_FILEPAGES val:33 [ 32.823325] BUG: Bad rss-counter state mm:000000004ad2b0bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4649' (ECDSA) to the list of known hosts. 2023/06/21 09:04:59 fuzzer started 2023/06/21 09:05:00 dialing manager at localhost:36067 2023/06/21 09:05:00 checking machine... 2023/06/21 09:05:00 checking revisions... [ 33.415855] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:05:00 testing simple program... [ 33.456867] cgroup: Unknown subsys name 'net' [ 33.490515] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:04:59 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800ea27f58 RCX=0000000000000000 RDX=ffff888015f38000 RSI=ffffffff818c20f6 RDI=00000000fffffdfe RBP=1ffff11001d44fd6 RSP=ffff88800ea27eb0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000ffffffff R13=0000000000000001 R14=00007fdf28000b80 R15=0000000000000000 RIP=ffffffff818c448b RFL=00000286 [--S--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 00007fdf2d467700 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=00007ffcbbbff3a8 CR3=0000000017db0000 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=2039353a34303a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a34303a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110011fd1d4 RSI=ffffffff8386a6ba RDI=ffff888008fe8ea0 RBP=00000000000000e5 RSP=ffff888017f2fa88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888008fe8ea0 R13=ffff888008fe8ea0 R14=ffff888017f2fb70 R15=0000000000000000 RIP=ffffffff8386a6cf 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 00007fe2d9747900 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=00007ffc9c91b000 CR3=000000001bfc2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000