syzkaller login: [ 33.199486] BUG: Bad rss-counter state mm:00000000bae4bbdf type:MM_FILEPAGES val:33 [ 33.200519] BUG: Bad rss-counter state mm:00000000bae4bbdf type:MM_ANONPAGES val:22 [ 33.369412] ================================================================== [ 33.370329] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.371276] Read of size 8 at addr ffff88800cd4edf0 by task sshd/219 [ 33.372050] [ 33.372389] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.373303] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.374273] Call Trace: [ 33.374621] [ 33.374908] dump_stack_lvl+0x91/0xf0 [ 33.375391] print_report+0xcc/0x620 [ 33.375871] ? __virt_addr_valid+0x102/0x340 [ 33.376419] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.377048] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.377660] kasan_report+0xbe/0xf0 [ 33.378138] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.378758] vma_interval_tree_remove+0xc75/0xec0 [ 33.379359] vma_prepare+0xc54/0x11a0 [ 33.379842] __split_vma+0x5af/0x950 [ 33.380311] ? __pfx___split_vma+0x10/0x10 [ 33.380836] ? find_held_lock+0x2c/0x110 [ 33.381370] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.381948] ? lock_is_held_type+0x9f/0x120 [ 33.382478] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.383089] ? mtree_range_walk+0x632/0x900 [ 33.383641] ? mas_walk+0x5c7/0x7c0 [ 33.384115] do_vmi_munmap+0x1f1/0x2b0 [ 33.384614] mmap_region+0x1f9/0x2660 [ 33.385118] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.385627] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.386345] ? __pfx_lock_acquire+0x10/0x10 [ 33.386882] ? __pfx_mmap_region+0x10/0x10 [ 33.387407] ? security_mmap_addr+0x7d/0xa0 [ 33.387929] ? get_unmapped_area+0x1f5/0x3f0 [ 33.388477] do_mmap+0x854/0xf00 [ 33.388923] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.389421] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.389975] ksys_mmap_pgoff+0x3af/0x500 [ 33.390495] do_syscall_64+0x3f/0x90 [ 33.390981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.391623] RIP: 0033:0x7f6a3062ad82 [ 33.392084] 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 [ 33.394198] RSP: 002b:00007ffd53431658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.395093] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a3062ad82 [ 33.395935] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a2fa64000 [ 33.396768] RBP: 00007f6a2fa64000 R08: 0000000000000009 R09: 0000000000001000 [ 33.397625] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd1b39ef70 [ 33.398453] R13: 00007ffd53431670 R14: 00007ffd534316a0 R15: 00007ffd53431a00 [ 33.399309] [ 33.399604] [ 33.399820] Allocated by task 212: [ 33.400258] kasan_save_stack+0x22/0x50 [ 33.400763] kasan_set_track+0x25/0x30 [ 33.401271] __kasan_slab_alloc+0x59/0x70 [ 33.401795] kmem_cache_alloc+0x16b/0x370 [ 33.402308] vm_area_dup+0x20/0x160 [ 33.402765] __split_vma+0x170/0x950 [ 33.403233] split_vma+0xc6/0x110 [ 33.403670] mprotect_fixup+0x8d2/0xb30 [ 33.404178] do_mprotect_pkey+0x87e/0xd40 [ 33.404707] __x64_sys_mprotect+0x78/0xc0 [ 33.405248] do_syscall_64+0x3f/0x90 [ 33.405718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.406356] [ 33.406573] Freed by task 212: [ 33.406969] kasan_save_stack+0x22/0x50 [ 33.407467] kasan_set_track+0x25/0x30 [ 33.407965] kasan_save_free_info+0x2b/0x50 [ 33.408504] __kasan_slab_free+0x10a/0x190 [ 33.409046] kmem_cache_free+0x10d/0x4d0 [ 33.409553] rcu_core+0x8c8/0x2860 [ 33.410001] __do_softirq+0x1b7/0x7d4 [ 33.410475] [ 33.410692] Last potentially related work creation: [ 33.411281] kasan_save_stack+0x22/0x50 [ 33.411785] __kasan_record_aux_stack+0x8e/0xa0 [ 33.412368] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.413023] remove_vma+0x139/0x170 [ 33.413561] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.414109] do_vmi_munmap+0x1f1/0x2b0 [ 33.414613] __vm_munmap+0x138/0x3a0 [ 33.415110] __x64_sys_munmap+0x59/0x80 [ 33.415601] do_syscall_64+0x3f/0x90 [ 33.416100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.416749] [ 33.416971] The buggy address belongs to the object at ffff88800cd4ed98 [ 33.416971] which belongs to the cache vm_area_struct of size 168 [ 33.418451] The buggy address is located 88 bytes inside of [ 33.418451] freed 168-byte region [ffff88800cd4ed98, ffff88800cd4ee40) [ 33.419883] [ 33.420100] The buggy address belongs to the physical page: [ 33.420768] page:000000008f9f5ad8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcd4e [ 33.421863] memcg:ffff8880102b7a01 [ 33.422299] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.422945] page_type: 0xffffffff() [ 33.423406] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.424366] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880102b7a01 [ 33.425340] page dumped because: kasan: bad access detected [ 33.426027] [ 33.426252] Memory state around the buggy address: [ 33.426865] ffff88800cd4ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.427775] ffff88800cd4ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.428682] >ffff88800cd4ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.429595] ^ [ 33.430438] ffff88800cd4ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.431333] ffff88800cd4ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.432237] ================================================================== [ 33.433239] Disabling lock debugging due to kernel taint [ 35.947213] BUG: Bad rss-counter state mm:0000000022d8d6d0 type:MM_FILEPAGES val:33 [ 35.948264] BUG: Bad rss-counter state mm:0000000022d8d6d0 type:MM_ANONPAGES val:22 [ 36.421852] BUG: Bad rss-counter state mm:00000000eb462337 type:MM_FILEPAGES val:33 [ 36.423004] BUG: Bad rss-counter state mm:00000000eb462337 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45947' (ECDSA) to the list of known hosts. 2023/06/20 03:53:26 fuzzer started 2023/06/20 03:53:26 dialing manager at localhost:44161 2023/06/20 03:53:26 checking machine... 2023/06/20 03:53:26 checking revisions... [ 37.119420] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:53:27 testing simple program... [ 37.169525] cgroup: Unknown subsys name 'net' [ 37.219482] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:53:24 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88800d2f7180 RCX=ffffffff8386be20 RDX=0000000000000003 RSI=0000000000000004 RDI=ffff888008c78eac RBP=ffff88800c6d7b18 RSP=ffff88800c6d79f8 R8 =0000000000000000 R9 =ffffed100118f1ff R10=ffff888008c78ffb R11=0000000000000000 R12=ffff888008c78ff8 R13=00000000000000e4 R14=ffff888008c78ea0 R15=ffff88800d2f7100 RIP=ffffffff8386be55 RFL=00000046 [---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 00007fd77f056900 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=00007ffd15e81000 CR3=000000000efc4000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffb38814008 CR3=0000000013a42000 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=0092cc58c2f657b3034ba85bc47d2d02 XMM02=ec2efd57dc4c00df000000000011e648 XMM03=bd5ac070a66d705e000000000011e718 XMM04=a24baac8216c75b800000000000ae988 XMM05=efacb630fd28612e0000000000134e20 XMM06=806171799158d9670000000000134aa8 XMM07=e042d86d42eb936e0000000000125290 XMM08=bd5ac070a66d705e000000000011e718 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000