syzkaller login: [ 30.791860] BUG: Bad rss-counter state mm:000000005965395b type:MM_FILEPAGES val:33 [ 30.792976] BUG: Bad rss-counter state mm:000000005965395b type:MM_ANONPAGES val:22 [ 30.839670] ================================================================== [ 30.840692] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.841812] Read of size 8 at addr ffff88800ca9f4e0 by task sshd/220 [ 30.842594] [ 30.842813] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.843672] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.844645] Call Trace: [ 30.844962] [ 30.845250] dump_stack_lvl+0x91/0xf0 [ 30.845738] print_report+0xcc/0x620 [ 30.846224] ? __virt_addr_valid+0x102/0x340 [ 30.846788] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847412] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.848031] kasan_report+0xbe/0xf0 [ 30.848506] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.849130] vma_interval_tree_remove+0xc75/0xec0 [ 30.849730] vma_prepare+0xc54/0x11a0 [ 30.850210] __split_vma+0x5af/0x950 [ 30.850693] ? __pfx___split_vma+0x10/0x10 [ 30.851218] ? find_held_lock+0x2c/0x110 [ 30.851733] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.852298] ? lock_is_held_type+0x9f/0x120 [ 30.852837] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.853449] ? mtree_range_walk+0x632/0x900 [ 30.854005] ? mas_walk+0x5c7/0x7c0 [ 30.854499] do_vmi_munmap+0x1f1/0x2b0 [ 30.855009] mmap_region+0x1f9/0x2660 [ 30.855510] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.856019] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.856721] ? __pfx_lock_acquire+0x10/0x10 [ 30.857257] ? __pfx_mmap_region+0x10/0x10 [ 30.857786] ? security_mmap_addr+0x7d/0xa0 [ 30.858311] ? get_unmapped_area+0x1f5/0x3f0 [ 30.858865] do_mmap+0x854/0xf00 [ 30.859311] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.859801] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.860368] ksys_mmap_pgoff+0x3af/0x500 [ 30.860869] do_syscall_64+0x3f/0x90 [ 30.861353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862003] RIP: 0033:0x7febde214d82 [ 30.862464] 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 [ 30.864609] RSP: 002b:00007fff7b116ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.865511] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007febde214d82 [ 30.866356] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007febdd64e000 [ 30.867201] RBP: 00007febdd64e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.868042] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604cb680f70 [ 30.868887] R13: 00007fff7b116ef0 R14: 00007fff7b116f20 R15: 00007fff7b117280 [ 30.869740] [ 30.870034] [ 30.870251] Allocated by task 213: [ 30.870696] kasan_save_stack+0x22/0x50 [ 30.871205] kasan_set_track+0x25/0x30 [ 30.871695] __kasan_slab_alloc+0x59/0x70 [ 30.872218] kmem_cache_alloc+0x16b/0x370 [ 30.872731] vm_area_dup+0x20/0x160 [ 30.873279] __split_vma+0x170/0x950 [ 30.873860] split_vma+0xc6/0x110 [ 30.874380] mprotect_fixup+0x8d2/0xb30 [ 30.874933] do_mprotect_pkey+0x87e/0xd40 [ 30.875456] __x64_sys_mprotect+0x78/0xc0 [ 30.875989] do_syscall_64+0x3f/0x90 [ 30.876465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877126] [ 30.877343] Freed by task 213: [ 30.877732] kasan_save_stack+0x22/0x50 [ 30.878253] kasan_set_track+0x25/0x30 [ 30.878768] kasan_save_free_info+0x2b/0x50 [ 30.879329] __kasan_slab_free+0x10a/0x190 [ 30.879859] kmem_cache_free+0x10d/0x4d0 [ 30.880386] rcu_core+0x8c8/0x2860 [ 30.880836] __do_softirq+0x1b7/0x7d4 [ 30.881323] [ 30.881536] Last potentially related work creation: [ 30.882141] kasan_save_stack+0x22/0x50 [ 30.882664] __kasan_record_aux_stack+0x8e/0xa0 [ 30.883251] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.883914] remove_vma+0x139/0x170 [ 30.884560] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.885140] do_vmi_munmap+0x1f1/0x2b0 [ 30.885635] __vm_munmap+0x138/0x3a0 [ 30.886114] __x64_sys_munmap+0x59/0x80 [ 30.886625] do_syscall_64+0x3f/0x90 [ 30.887119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887779] [ 30.888010] Second to last potentially related work creation: [ 30.888700] kasan_save_stack+0x22/0x50 [ 30.889248] __kasan_record_aux_stack+0x8e/0xa0 [ 30.889836] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.890517] remove_vma+0x139/0x170 [ 30.890992] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.891557] do_vmi_munmap+0x1f1/0x2b0 [ 30.892054] mmap_region+0x1f9/0x2660 [ 30.892529] do_mmap+0x854/0xf00 [ 30.892976] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.893458] ksys_mmap_pgoff+0x3af/0x500 [ 30.893995] do_syscall_64+0x3f/0x90 [ 30.894501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895161] [ 30.895376] The buggy address belongs to the object at ffff88800ca9f488 [ 30.895376] which belongs to the cache vm_area_struct of size 168 [ 30.896832] The buggy address is located 88 bytes inside of [ 30.896832] freed 168-byte region [ffff88800ca9f488, ffff88800ca9f530) [ 30.898242] [ 30.898462] The buggy address belongs to the physical page: [ 30.899147] page:0000000029959d02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca9f [ 30.900236] memcg:ffff8880093b5301 [ 30.900666] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.901320] page_type: 0xffffffff() [ 30.901765] raw: 0100000000000200 ffff8880087a0c80 ffffea000031e180 dead000000000006 [ 30.902702] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880093b5301 [ 30.903615] page dumped because: kasan: bad access detected [ 30.904304] [ 30.904518] Memory state around the buggy address: [ 30.905108] ffff88800ca9f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.905972] ffff88800ca9f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.906835] >ffff88800ca9f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.907704] ^ [ 30.908483] ffff88800ca9f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.909395] ffff88800ca9f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.910282] ================================================================== [ 30.911258] Disabling lock debugging due to kernel taint [ 32.905734] BUG: Bad rss-counter state mm:00000000b9f3030b type:MM_FILEPAGES val:33 [ 32.906748] BUG: Bad rss-counter state mm:00000000b9f3030b type:MM_ANONPAGES val:22 [ 33.425140] BUG: Bad rss-counter state mm:00000000a5573074 type:MM_FILEPAGES val:33 [ 33.426348] BUG: Bad rss-counter state mm:00000000a5573074 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51620' (ECDSA) to the list of known hosts. 2023/06/20 12:56:14 fuzzer started 2023/06/20 12:56:14 dialing manager at localhost:36067 2023/06/20 12:56:14 checking machine... 2023/06/20 12:56:14 checking revisions... [ 34.129337] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:56:15 testing simple program... [ 34.181479] cgroup: Unknown subsys name 'net' [ 34.252156] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:56:14 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=00007fb610f26b20 CR3=000000000f1fa000 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=00000000000000000000000000000000 XMM01=f17bbfc0ab314b8cae42e04b616e62d1 XMM02=ec2efd57dc4c00df000000000011d6d0 XMM03=6db7edbae17a0d8d000000000011d7a0 XMM04=f0bf5d57efe22ca700000000000ae988 XMM05=593fb266bcde7b3c0000000000133200 XMM06=4fda316b135da52b0000000000132e88 XMM07=e042d86d42eb936e0000000000122088 XMM08=6db7edbae17a0d8d000000000011d7a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f781b30 RCX=ffffffff81370ce8 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000200 RSP=ffff888008e37cc0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff88806cf35000 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff8137110c RFL=00000016 [----AP-] 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 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=00007ffc531ba000 CR3=000000000edc2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000