syzkaller login: [ 40.892814] BUG: Bad rss-counter state mm:000000003b0a492a type:MM_FILEPAGES val:33 [ 40.894091] BUG: Bad rss-counter state mm:000000003b0a492a type:MM_ANONPAGES val:22 [ 40.934076] ================================================================== [ 40.935055] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.936162] Read of size 8 at addr ffff88801a1b6a50 by task sshd/221 [ 40.937015] [ 40.937336] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.938257] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.939242] Call Trace: [ 40.939564] [ 40.939913] dump_stack_lvl+0x91/0xf0 [ 40.940485] print_report+0xcc/0x620 [ 40.940965] ? __virt_addr_valid+0x102/0x340 [ 40.941517] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.942147] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.942773] kasan_report+0xbe/0xf0 [ 40.943252] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.943887] vma_interval_tree_remove+0xc75/0xec0 [ 40.944490] vma_prepare+0xc54/0x11a0 [ 40.944973] __split_vma+0x5af/0x950 [ 40.945448] ? __pfx___split_vma+0x10/0x10 [ 40.945972] ? find_held_lock+0x2c/0x110 [ 40.946500] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.947068] ? lock_is_held_type+0x9f/0x120 [ 40.947608] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.948225] ? mtree_range_walk+0x632/0x900 [ 40.948773] ? mas_walk+0x5c7/0x7c0 [ 40.949253] do_vmi_munmap+0x1f1/0x2b0 [ 40.949745] mmap_region+0x1f9/0x2660 [ 40.950225] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.950729] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.951445] ? __pfx_lock_acquire+0x10/0x10 [ 40.951986] ? __pfx_mmap_region+0x10/0x10 [ 40.952520] ? security_mmap_addr+0x7d/0xa0 [ 40.953053] ? get_unmapped_area+0x1f5/0x3f0 [ 40.953625] do_mmap+0x854/0xf00 [ 40.954063] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.954566] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.955136] ksys_mmap_pgoff+0x3af/0x500 [ 40.955649] do_syscall_64+0x3f/0x90 [ 40.956153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.956802] RIP: 0033:0x7f6be8a16d82 [ 40.957260] 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 [ 40.959396] RSP: 002b:00007fff36ae4868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.960328] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6be8a16d82 [ 40.961242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6be7e50000 [ 40.962155] RBP: 00007f6be7e50000 R08: 0000000000000009 R09: 0000000000001000 [ 40.963060] R10: 0000000000000812 R11: 0000000000000206 R12: 000055abeac1eb20 [ 40.963977] R13: 00007fff36ae4880 R14: 00007fff36ae48b0 R15: 00007fff36ae4c10 [ 40.964896] [ 40.965205] [ 40.965436] Allocated by task 214: [ 40.965896] kasan_save_stack+0x22/0x50 [ 40.966430] kasan_set_track+0x25/0x30 [ 40.966954] __kasan_slab_alloc+0x59/0x70 [ 40.967509] kmem_cache_alloc+0x16b/0x370 [ 40.968067] vm_area_dup+0x20/0x160 [ 40.968525] __split_vma+0x170/0x950 [ 40.968991] split_vma+0xc6/0x110 [ 40.969428] mprotect_fixup+0x8d2/0xb30 [ 40.969930] do_mprotect_pkey+0x87e/0xd40 [ 40.970452] __x64_sys_mprotect+0x78/0xc0 [ 40.970979] do_syscall_64+0x3f/0x90 [ 40.971459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.972145] [ 40.972377] Freed by task 214: [ 40.972794] kasan_save_stack+0x22/0x50 [ 40.973327] kasan_set_track+0x25/0x30 [ 40.973850] kasan_save_free_info+0x2b/0x50 [ 40.974408] __kasan_slab_free+0x10a/0x190 [ 40.974970] kmem_cache_free+0x10d/0x4d0 [ 40.975509] rcu_core+0x8c8/0x2860 [ 40.975996] __do_softirq+0x1b7/0x7d4 [ 40.976498] [ 40.976728] Last potentially related work creation: [ 40.977352] kasan_save_stack+0x22/0x50 [ 40.977881] __kasan_record_aux_stack+0x8e/0xa0 [ 40.978527] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.979204] remove_vma+0x139/0x170 [ 40.979685] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.980278] do_vmi_munmap+0x1f1/0x2b0 [ 40.980794] __vm_munmap+0x138/0x3a0 [ 40.981290] __x64_sys_munmap+0x59/0x80 [ 40.981816] do_syscall_64+0x3f/0x90 [ 40.982319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.983002] [ 40.983226] The buggy address belongs to the object at ffff88801a1b69f8 [ 40.983226] which belongs to the cache vm_area_struct of size 168 [ 40.984763] The buggy address is located 88 bytes inside of [ 40.984763] freed 168-byte region [ffff88801a1b69f8, ffff88801a1b6aa0) [ 40.986196] [ 40.986429] The buggy address belongs to the physical page: [ 40.987119] page:000000002856b517 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1b6 [ 40.988268] memcg:ffff88800e624a01 [ 40.988695] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.989360] page_type: 0xffffffff() [ 40.989811] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.990726] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e624a01 [ 40.991670] page dumped because: kasan: bad access detected [ 40.992367] [ 40.992584] Memory state around the buggy address: [ 40.993204] ffff88801a1b6900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.994093] ffff88801a1b6980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 40.994981] >ffff88801a1b6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.995850] ^ [ 40.996568] ffff88801a1b6a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 40.997444] ffff88801a1b6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.998289] ================================================================== [ 40.999207] Disabling lock debugging due to kernel taint [ 42.876027] BUG: Bad rss-counter state mm:00000000d857e630 type:MM_FILEPAGES val:33 [ 42.877168] BUG: Bad rss-counter state mm:00000000d857e630 type:MM_ANONPAGES val:22 [ 43.353981] BUG: Bad rss-counter state mm:00000000bdbab824 type:MM_FILEPAGES val:33 [ 43.354961] BUG: Bad rss-counter state mm:00000000bdbab824 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50042' (ECDSA) to the list of known hosts. 2023/06/19 19:33:59 fuzzer started 2023/06/19 19:33:59 dialing manager at localhost:44161 2023/06/19 19:33:59 checking machine... 2023/06/19 19:33:59 checking revisions... [ 44.116705] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:34:00 testing simple program... [ 44.158143] cgroup: Unknown subsys name 'net' [ 44.194546] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:33:49 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800f598b80 RCX=1ffff11001eb322c RDX=1ffff11001eb31b6 RSI=0000000000000004 RDI=ffff888008d57aa8 RBP=1ffff110011aaf76 RSP=ffff888008d57b38 R8 =0000000000000001 R9 =ffffed10011aaf55 R10=0000000000000003 R11=0000000000000000 R12=ffff88800f598d98 R13=0000000000005094 R14=ffff88800f598000 R15=ffff88800f598b80 RIP=ffffffff8302dbd1 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 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=00007ffc74c37000 CR3=000000001cdea000 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=0000000080000000 RBX=ffff888015895c00 RCX=ffffffff8449b510 RDX=ffff888006a3d1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800f19d026 RSP=ffff8880166c7a90 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=ffff88800f19d000 R13=ffff8880166c7e88 R14=0000000000000002 R15=ffff8880166c7e70 RIP=ffffffff814c07eb RFL=00000202 [-------] 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 00007f0453b50900 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=00007f0453b2f020 CR3=000000001cdea000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000