syzkaller login: [ 30.522314] BUG: Bad rss-counter state mm:000000002f921904 type:MM_FILEPAGES val:33 [ 30.523385] BUG: Bad rss-counter state mm:000000002f921904 type:MM_ANONPAGES val:22 [ 30.685294] ================================================================== [ 30.686234] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.687170] Read of size 8 at addr ffff88800fd4ad08 by task sshd/220 [ 30.687930] [ 30.688143] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.689195] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.690182] Call Trace: [ 30.690510] [ 30.690803] dump_stack_lvl+0x91/0xf0 [ 30.691294] print_report+0xcc/0x620 [ 30.691782] ? __virt_addr_valid+0x102/0x340 [ 30.692341] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.692972] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.693614] kasan_report+0xbe/0xf0 [ 30.694092] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.694713] vma_interval_tree_remove+0xc75/0xec0 [ 30.695320] vma_prepare+0xc54/0x11a0 [ 30.695803] __split_vma+0x5af/0x950 [ 30.696281] ? __pfx___split_vma+0x10/0x10 [ 30.696808] ? find_held_lock+0x2c/0x110 [ 30.697325] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.697922] ? lock_is_held_type+0x9f/0x120 [ 30.698464] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.699068] ? mtree_range_walk+0x632/0x900 [ 30.699621] ? mas_walk+0x5c7/0x7c0 [ 30.700106] do_vmi_munmap+0x1f1/0x2b0 [ 30.700595] mmap_region+0x1f9/0x2660 [ 30.701076] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.701601] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.702322] ? __pfx_lock_acquire+0x10/0x10 [ 30.702859] ? __pfx_mmap_region+0x10/0x10 [ 30.703390] ? security_mmap_addr+0x7d/0xa0 [ 30.703934] ? get_unmapped_area+0x1f5/0x3f0 [ 30.704498] do_mmap+0x854/0xf00 [ 30.704948] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.705461] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.706033] ksys_mmap_pgoff+0x3af/0x500 [ 30.706557] do_syscall_64+0x3f/0x90 [ 30.707039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.707703] RIP: 0033:0x7f05126dbd82 [ 30.708169] 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 [ 30.710385] RSP: 002b:00007ffcc386f5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.711306] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05126dbd82 [ 30.712192] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0511b15000 [ 30.713076] RBP: 00007f0511b15000 R08: 0000000000000009 R09: 0000000000001000 [ 30.713945] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565031f92ec0 [ 30.714801] R13: 00007ffcc386f5d0 R14: 00007ffcc386f600 R15: 00007ffcc386f960 [ 30.715665] [ 30.715962] [ 30.716178] Allocated by task 212: [ 30.716622] kasan_save_stack+0x22/0x50 [ 30.717147] kasan_set_track+0x25/0x30 [ 30.717671] __kasan_slab_alloc+0x59/0x70 [ 30.718216] kmem_cache_alloc+0x16b/0x370 [ 30.718733] vm_area_dup+0x20/0x160 [ 30.719185] __split_vma+0x170/0x950 [ 30.719653] split_vma+0xc6/0x110 [ 30.720093] mprotect_fixup+0x8d2/0xb30 [ 30.720589] do_mprotect_pkey+0x87e/0xd40 [ 30.721116] __x64_sys_mprotect+0x78/0xc0 [ 30.721655] do_syscall_64+0x3f/0x90 [ 30.722132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.722781] [ 30.722997] Freed by task 202: [ 30.723395] kasan_save_stack+0x22/0x50 [ 30.723901] kasan_set_track+0x25/0x30 [ 30.724393] kasan_save_free_info+0x2b/0x50 [ 30.724929] __kasan_slab_free+0x10a/0x190 [ 30.725511] kmem_cache_free+0x10d/0x4d0 [ 30.726038] rcu_core+0x8c8/0x2860 [ 30.726486] __do_softirq+0x1b7/0x7d4 [ 30.726970] [ 30.727190] Last potentially related work creation: [ 30.727777] kasan_save_stack+0x22/0x50 [ 30.728285] __kasan_record_aux_stack+0x8e/0xa0 [ 30.728895] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.729648] remove_vma+0x139/0x170 [ 30.730122] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.730682] do_vmi_munmap+0x1f1/0x2b0 [ 30.731172] __vm_munmap+0x138/0x3a0 [ 30.731644] __x64_sys_munmap+0x59/0x80 [ 30.732154] do_syscall_64+0x3f/0x90 [ 30.732631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.733282] [ 30.733517] The buggy address belongs to the object at ffff88800fd4acb0 [ 30.733517] which belongs to the cache vm_area_struct of size 168 [ 30.735013] The buggy address is located 88 bytes inside of [ 30.735013] freed 168-byte region [ffff88800fd4acb0, ffff88800fd4ad58) [ 30.736490] [ 30.736713] The buggy address belongs to the physical page: [ 30.737452] page:000000004e96c45b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd4a [ 30.738574] memcg:ffff888015f0b901 [ 30.739022] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.739753] page_type: 0xffffffff() [ 30.740226] raw: 0100000000000200 ffff8880087a0c80 ffffea000031f640 0000000000000005 [ 30.741165] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015f0b901 [ 30.742109] page dumped because: kasan: bad access detected [ 30.742767] [ 30.742984] Memory state around the buggy address: [ 30.743560] ffff88800fd4ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.744417] ffff88800fd4ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.745271] >ffff88800fd4ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.746164] ^ [ 30.746610] ffff88800fd4ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.747467] ffff88800fd4ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.748318] ================================================================== [ 30.749236] Disabling lock debugging due to kernel taint [ 32.726412] BUG: Bad rss-counter state mm:00000000b117ca3c type:MM_FILEPAGES val:33 [ 32.727390] BUG: Bad rss-counter state mm:00000000b117ca3c type:MM_ANONPAGES val:22 [ 33.259152] BUG: Bad rss-counter state mm:00000000a7530a5a type:MM_FILEPAGES val:33 [ 33.260311] BUG: Bad rss-counter state mm:00000000a7530a5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42572' (ECDSA) to the list of known hosts. 2023/06/21 05:40:28 fuzzer started 2023/06/21 05:40:28 dialing manager at localhost:36067 2023/06/21 05:40:28 checking machine... 2023/06/21 05:40:28 checking revisions... [ 33.939504] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:40:28 testing simple program... [ 33.989639] cgroup: Unknown subsys name 'net' [ 34.038636] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:40:28 Registers: info registers vcpu 0 RAX=ffffffff860d2fe1 RBX=0000000000000002 RCX=ffffffff860d2fdc RDX=0000000000000000 RSI=0000000000000001 RDI=ffffffff85dba0f4 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff860d2fd0 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09ab9 R15=ffff88806ce09a78 RIP=ffffffff81130a6e 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 00007f458094c700 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=00007ff6f30b90b0 CR3=000000001846a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732038323a3034 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323733 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f01e87e2040 CR3=000000000c6f2000 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=0e646fa39a2b8c8d8c498cd53d19c17d XMM02=ec2efd57dc4c00df000000000011a9f0 XMM03=de90f7068c176685000000000011aac0 XMM04=538e223040c5c9a500000000000ae988 XMM05=d4e834ab5a2dd1e40000000000132be8 XMM06=806171799158d9670000000000131c88 XMM07=e042d86d42eb936e0000000000121f88 XMM08=de90f7068c176685000000000011aac0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000