syzkaller login: [ 30.582618] BUG: Bad rss-counter state mm:0000000066c7db22 type:MM_FILEPAGES val:33 [ 30.583791] BUG: Bad rss-counter state mm:0000000066c7db22 type:MM_ANONPAGES val:22 [ 30.755226] ================================================================== [ 30.756198] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.757150] Read of size 8 at addr ffff88800e0fd880 by task sshd/222 [ 30.757945] [ 30.758289] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.759201] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.760209] Call Trace: [ 30.760546] <TASK> [ 30.760839] dump_stack_lvl+0x91/0xf0 [ 30.761344] print_report+0xcc/0x620 [ 30.761841] ? __virt_addr_valid+0x102/0x340 [ 30.762406] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.763039] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.763683] kasan_report+0xbe/0xf0 [ 30.764164] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.764804] vma_interval_tree_remove+0xc75/0xec0 [ 30.765413] vma_prepare+0xc54/0x11a0 [ 30.765905] __split_vma+0x5af/0x950 [ 30.766382] ? __pfx___split_vma+0x10/0x10 [ 30.766922] ? find_held_lock+0x2c/0x110 [ 30.767467] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.768043] ? lock_is_held_type+0x9f/0x120 [ 30.768599] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.769231] ? mtree_range_walk+0x632/0x900 [ 30.769801] ? mas_walk+0x5c7/0x7c0 [ 30.770286] do_vmi_munmap+0x1f1/0x2b0 [ 30.770800] mmap_region+0x1f9/0x2660 [ 30.771313] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.771843] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.772572] ? __pfx_lock_acquire+0x10/0x10 [ 30.773126] ? __pfx_mmap_region+0x10/0x10 [ 30.773675] ? security_mmap_addr+0x7d/0xa0 [ 30.774222] ? get_unmapped_area+0x1f5/0x3f0 [ 30.774789] do_mmap+0x854/0xf00 [ 30.775247] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.775760] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.776332] ksys_mmap_pgoff+0x3af/0x500 [ 30.776863] do_syscall_64+0x3f/0x90 [ 30.777356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.778020] RIP: 0033:0x7f137584ed82 [ 30.778485] 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 [ 30.780652] RSP: 002b:00007fffef5c8f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.781567] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f137584ed82 [ 30.782437] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1374c88000 [ 30.783319] RBP: 00007f1374c88000 R08: 0000000000000009 R09: 0000000000001000 [ 30.784174] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a5813dcec0 [ 30.785034] R13: 00007fffef5c8f50 R14: 00007fffef5c8f80 R15: 00007fffef5c92e0 [ 30.785920] </TASK> [ 30.786216] [ 30.786443] Allocated by task 215: [ 30.786887] kasan_save_stack+0x22/0x50 [ 30.787431] kasan_set_track+0x25/0x30 [ 30.787944] __kasan_slab_alloc+0x59/0x70 [ 30.788482] kmem_cache_alloc+0x16b/0x370 [ 30.789021] vm_area_dup+0x20/0x160 [ 30.789494] __split_vma+0x170/0x950 [ 30.789975] split_vma+0xc6/0x110 [ 30.790415] mprotect_fixup+0x8d2/0xb30 [ 30.790936] do_mprotect_pkey+0x87e/0xd40 [ 30.791488] __x64_sys_mprotect+0x78/0xc0 [ 30.792025] do_syscall_64+0x3f/0x90 [ 30.792505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.793168] [ 30.793386] Freed by task 215: [ 30.793786] kasan_save_stack+0x22/0x50 [ 30.794305] kasan_set_track+0x25/0x30 [ 30.794808] kasan_save_free_info+0x2b/0x50 [ 30.795370] __kasan_slab_free+0x10a/0x190 [ 30.795919] kmem_cache_free+0x10d/0x4d0 [ 30.796443] rcu_core+0x8c8/0x2860 [ 30.796894] __do_softirq+0x1b7/0x7d4 [ 30.797377] [ 30.797601] Last potentially related work creation: [ 30.798198] kasan_save_stack+0x22/0x50 [ 30.798719] __kasan_record_aux_stack+0x8e/0xa0 [ 30.799317] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.799982] remove_vma+0x139/0x170 [ 30.800442] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.801022] do_vmi_munmap+0x1f1/0x2b0 [ 30.801519] __vm_munmap+0x138/0x3a0 [ 30.801998] __x64_sys_munmap+0x59/0x80 [ 30.802512] do_syscall_64+0x3f/0x90 [ 30.802993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.803665] [ 30.803889] The buggy address belongs to the object at ffff88800e0fd828 [ 30.803889] which belongs to the cache vm_area_struct of size 168 [ 30.805403] The buggy address is located 88 bytes inside of [ 30.805403] freed 168-byte region [ffff88800e0fd828, ffff88800e0fd8d0) [ 30.806859] [ 30.807084] The buggy address belongs to the physical page: [ 30.807774] page:00000000c2167a1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0fd [ 30.808891] memcg:ffff88800cc0ed01 [ 30.809327] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.809988] page_type: 0xffffffff() [ 30.810447] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.811384] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc0ed01 [ 30.812315] page dumped because: kasan: bad access detected [ 30.812986] [ 30.813207] Memory state around the buggy address: [ 30.813794] ffff88800e0fd780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.814659] ffff88800e0fd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.815545] >ffff88800e0fd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.816417] ^ [ 30.816833] ffff88800e0fd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.817718] ffff88800e0fd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.818588] ================================================================== [ 30.819981] Disabling lock debugging due to kernel taint [ 32.685153] BUG: Bad rss-counter state mm:00000000948f2355 type:MM_FILEPAGES val:33 [ 32.686291] BUG: Bad rss-counter state mm:00000000948f2355 type:MM_ANONPAGES val:22 [ 33.133267] BUG: Bad rss-counter state mm:00000000e1f25531 type:MM_FILEPAGES val:33 [ 33.134142] BUG: Bad rss-counter state mm:00000000e1f25531 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28225' (ECDSA) to the list of known hosts. 2023/06/20 10:59:05 fuzzer started 2023/06/20 10:59:06 dialing manager at localhost:36067 2023/06/20 10:59:06 checking machine... 2023/06/20 10:59:06 checking revisions... [ 33.857394] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:59:06 testing simple program... [ 33.907386] cgroup: Unknown subsys name 'net' [ 33.961305] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:59:05 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6b RBX=1ffff11002d74e4b RCX=ffffffff812d8f13 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888016ba7230 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180f12f 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 00007f3d5fb1d900 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=00007ffe88dbf000 CR3=000000000ef80000 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=00007f3f6195eee0 CR3=000000000f11e000 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=052595ad69dec6b7d64d274dcda3ea90 XMM02=000000000011aa60ec2efd57dc4c00df XMM03=0000000000121fd85eb0b2608dab5913 XMM04=71003d88f6b0d15c00000000000ae988 XMM05=83594ee05b8d38950000000000131e30 XMM06=4cefe521d3f912540000000000130c98 XMM07=e042d86d42eb936e0000000000122258 XMM08=5eb0b2608dab5913000000000011aac0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000