syzkaller login: [ 36.178037] BUG: Bad rss-counter state mm:0000000071511181 type:MM_FILEPAGES val:33 [ 36.179118] BUG: Bad rss-counter state mm:0000000071511181 type:MM_ANONPAGES val:22 [ 36.341709] ================================================================== [ 36.342609] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.343545] Read of size 8 at addr ffff88800d12e968 by task sshd/219 [ 36.344417] [ 36.344641] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.345506] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.346495] Call Trace: [ 36.346814] [ 36.347099] dump_stack_lvl+0x91/0xf0 [ 36.347617] print_report+0xcc/0x620 [ 36.348104] ? __virt_addr_valid+0x102/0x340 [ 36.348656] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.349279] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.349892] kasan_report+0xbe/0xf0 [ 36.350372] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.350991] vma_interval_tree_remove+0xc75/0xec0 [ 36.351608] vma_prepare+0xc54/0x11a0 [ 36.352091] __split_vma+0x5af/0x950 [ 36.352567] ? __pfx___split_vma+0x10/0x10 [ 36.353094] ? find_held_lock+0x2c/0x110 [ 36.353615] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.354183] ? lock_is_held_type+0x9f/0x120 [ 36.354723] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.355335] ? mtree_range_walk+0x632/0x900 [ 36.355895] ? mas_walk+0x5c7/0x7c0 [ 36.356382] do_vmi_munmap+0x1f1/0x2b0 [ 36.356881] mmap_region+0x1f9/0x2660 [ 36.357370] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.357886] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.358609] ? __pfx_lock_acquire+0x10/0x10 [ 36.359144] ? __pfx_mmap_region+0x10/0x10 [ 36.359703] ? security_mmap_addr+0x7d/0xa0 [ 36.360234] ? get_unmapped_area+0x1f5/0x3f0 [ 36.360787] do_mmap+0x854/0xf00 [ 36.361229] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.361721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.362287] ksys_mmap_pgoff+0x3af/0x500 [ 36.362793] do_syscall_64+0x3f/0x90 [ 36.363278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.363940] RIP: 0033:0x7f0980d22d82 [ 36.364403] 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 [ 36.366545] RSP: 002b:00007ffea097d5e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.367469] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0980d22d82 [ 36.368351] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f098015c000 [ 36.369209] RBP: 00007f098015c000 R08: 0000000000000009 R09: 0000000000001000 [ 36.370068] R10: 0000000000000812 R11: 0000000000000206 R12: 00005615bc794980 [ 36.370928] R13: 00007ffea097d600 R14: 00007ffea097d630 R15: 00007ffea097d990 [ 36.371812] [ 36.372124] [ 36.372348] Allocated by task 212: [ 36.372779] kasan_save_stack+0x22/0x50 [ 36.373287] kasan_set_track+0x25/0x30 [ 36.373782] __kasan_slab_alloc+0x59/0x70 [ 36.374306] kmem_cache_alloc+0x16b/0x370 [ 36.374830] vm_area_dup+0x20/0x160 [ 36.375293] __split_vma+0x170/0x950 [ 36.375771] split_vma+0xc6/0x110 [ 36.376216] mprotect_fixup+0x8d2/0xb30 [ 36.376719] do_mprotect_pkey+0x87e/0xd40 [ 36.377241] __x64_sys_mprotect+0x78/0xc0 [ 36.377761] do_syscall_64+0x3f/0x90 [ 36.378248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.378913] [ 36.379127] Freed by task 203: [ 36.379551] kasan_save_stack+0x22/0x50 [ 36.380056] kasan_set_track+0x25/0x30 [ 36.380554] kasan_save_free_info+0x2b/0x50 [ 36.381090] __kasan_slab_free+0x10a/0x190 [ 36.381627] kmem_cache_free+0x10d/0x4d0 [ 36.382131] rcu_core+0x8c8/0x2860 [ 36.382575] __do_softirq+0x1b7/0x7d4 [ 36.383050] [ 36.383266] Last potentially related work creation: [ 36.383855] kasan_save_stack+0x22/0x50 [ 36.384370] __kasan_record_aux_stack+0x8e/0xa0 [ 36.384947] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.385588] remove_vma+0x139/0x170 [ 36.386037] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.386595] do_vmi_munmap+0x1f1/0x2b0 [ 36.387078] __vm_munmap+0x138/0x3a0 [ 36.387570] __x64_sys_munmap+0x59/0x80 [ 36.388069] do_syscall_64+0x3f/0x90 [ 36.388542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.389188] [ 36.389407] Second to last potentially related work creation: [ 36.390088] kasan_save_stack+0x22/0x50 [ 36.390599] __kasan_record_aux_stack+0x8e/0xa0 [ 36.391172] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.391826] remove_vma+0x139/0x170 [ 36.392280] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.392845] do_vmi_munmap+0x1f1/0x2b0 [ 36.393326] mmap_region+0x1f9/0x2660 [ 36.393811] do_mmap+0x854/0xf00 [ 36.394272] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.394756] ksys_mmap_pgoff+0x3af/0x500 [ 36.395259] do_syscall_64+0x3f/0x90 [ 36.395755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.396403] [ 36.396621] The buggy address belongs to the object at ffff88800d12e910 [ 36.396621] which belongs to the cache vm_area_struct of size 168 [ 36.398102] The buggy address is located 88 bytes inside of [ 36.398102] freed 168-byte region [ffff88800d12e910, ffff88800d12e9b8) [ 36.399534] [ 36.399756] The buggy address belongs to the physical page: [ 36.400413] page:00000000f1c4ad39 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd12e [ 36.401505] memcg:ffff88800d3d5401 [ 36.401934] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.402588] page_type: 0xffffffff() [ 36.403039] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 36.403979] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3d5401 [ 36.404875] page dumped because: kasan: bad access detected [ 36.405528] [ 36.405742] Memory state around the buggy address: [ 36.406324] ffff88800d12e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.407170] ffff88800d12e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.408045] >ffff88800d12e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.408898] ^ [ 36.409683] ffff88800d12e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 36.410541] ffff88800d12ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.411410] ================================================================== [ 36.412434] Disabling lock debugging due to kernel taint [ 38.527914] BUG: Bad rss-counter state mm:0000000086ad4451 type:MM_FILEPAGES val:33 [ 38.529094] BUG: Bad rss-counter state mm:0000000086ad4451 type:MM_ANONPAGES val:22 [ 39.012407] BUG: Bad rss-counter state mm:00000000c8f676ea type:MM_FILEPAGES val:33 [ 39.013569] BUG: Bad rss-counter state mm:00000000c8f676ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46741' (ECDSA) to the list of known hosts. 2023/06/21 01:58:39 fuzzer started 2023/06/21 01:58:39 dialing manager at localhost:36067 2023/06/21 01:58:40 checking machine... 2023/06/21 01:58:40 checking revisions... [ 39.658215] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:58:40 testing simple program... [ 39.713865] cgroup: Unknown subsys name 'net' [ 39.766278] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:58:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019e1fdf0 RCX=ffffffff81859c62 RDX=ffff888015bbd1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff888019e1fd80 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000008000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0860 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 00007f47bb6d2900 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=00007ffe8939b000 CR3=000000000dcee000 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=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 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=ffff888008c04400 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=00007f5bc0577c10 CR3=000000000ecb8000 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=9122992f97f569b30848e255bdc29e07 XMM02=000000000011ba60eff9b2d0a8fce9cb XMM03=000000000011bb302c67c8bc2e329bc3 XMM04=cdda5936c8baf73400000000000ae988 XMM05=19e9129bd510f2350000000000133018 XMM06=4fda316b135da52b0000000000132ea0 XMM07=e042d86d42eb936e0000000000122380 XMM08=e6ea6df9b1c06cb4000000000011bb30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000