syzkaller login: [ 39.492442] BUG: Bad rss-counter state mm:000000009440f9cb type:MM_FILEPAGES val:33 [ 39.494692] BUG: Bad rss-counter state mm:000000009440f9cb type:MM_ANONPAGES val:22 [ 39.674219] ================================================================== [ 39.675200] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.676180] Read of size 8 at addr ffff88800de013f8 by task sshd/219 [ 39.677095] [ 39.677323] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.678261] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.679285] Call Trace: [ 39.679616] [ 39.679910] dump_stack_lvl+0x91/0xf0 [ 39.680420] print_report+0xcc/0x620 [ 39.680926] ? __virt_addr_valid+0x102/0x340 [ 39.681508] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.682168] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.682817] kasan_report+0xbe/0xf0 [ 39.683311] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.683962] vma_interval_tree_remove+0xc75/0xec0 [ 39.684593] vma_prepare+0xc54/0x11a0 [ 39.685112] __split_vma+0x5af/0x950 [ 39.685602] ? __pfx___split_vma+0x10/0x10 [ 39.686167] ? find_held_lock+0x2c/0x110 [ 39.686712] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.687308] ? lock_is_held_type+0x9f/0x120 [ 39.687870] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.688508] ? mtree_range_walk+0x632/0x900 [ 39.689090] ? mas_walk+0x5c7/0x7c0 [ 39.689589] do_vmi_munmap+0x1f1/0x2b0 [ 39.690127] mmap_region+0x1f9/0x2660 [ 39.690633] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.691172] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.691937] ? __pfx_lock_acquire+0x10/0x10 [ 39.692498] ? __pfx_mmap_region+0x10/0x10 [ 39.693052] ? security_mmap_addr+0x7d/0xa0 [ 39.693618] ? get_unmapped_area+0x1f5/0x3f0 [ 39.694211] do_mmap+0x854/0xf00 [ 39.694672] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.695200] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.695799] ksys_mmap_pgoff+0x3af/0x500 [ 39.696342] do_syscall_64+0x3f/0x90 [ 39.696848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.697531] RIP: 0033:0x7fab6e32cd82 [ 39.698026] 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 [ 39.700292] RSP: 002b:00007ffea3b16d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.701243] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab6e32cd82 [ 39.702140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab6d766000 [ 39.703016] RBP: 00007fab6d766000 R08: 0000000000000009 R09: 0000000000001000 [ 39.703896] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f28de9ec0 [ 39.704789] R13: 00007ffea3b16d20 R14: 00007ffea3b16d50 R15: 00007ffea3b170b0 [ 39.705726] [ 39.706037] [ 39.706267] Allocated by task 212: [ 39.706713] kasan_save_stack+0x22/0x50 [ 39.707248] kasan_set_track+0x25/0x30 [ 39.707780] __kasan_slab_alloc+0x59/0x70 [ 39.708352] kmem_cache_alloc+0x16b/0x370 [ 39.708910] vm_area_dup+0x20/0x160 [ 39.709396] __split_vma+0x170/0x950 [ 39.709909] split_vma+0xc6/0x110 [ 39.710386] mprotect_fixup+0x8d2/0xb30 [ 39.710928] do_mprotect_pkey+0x87e/0xd40 [ 39.711489] __x64_sys_mprotect+0x78/0xc0 [ 39.712047] do_syscall_64+0x3f/0x90 [ 39.712558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.713240] [ 39.713468] Freed by task 212: [ 39.713898] kasan_save_stack+0x22/0x50 [ 39.714444] kasan_set_track+0x25/0x30 [ 39.714972] kasan_save_free_info+0x2b/0x50 [ 39.715543] __kasan_slab_free+0x10a/0x190 [ 39.716117] kmem_cache_free+0x10d/0x4d0 [ 39.716660] rcu_core+0x8c8/0x2860 [ 39.717144] __do_softirq+0x1b7/0x7d4 [ 39.717657] [ 39.717897] Last potentially related work creation: [ 39.718533] kasan_save_stack+0x22/0x50 [ 39.719077] __kasan_record_aux_stack+0x8e/0xa0 [ 39.719702] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.720405] remove_vma+0x139/0x170 [ 39.720896] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.721503] do_vmi_munmap+0x1f1/0x2b0 [ 39.722038] __vm_munmap+0x138/0x3a0 [ 39.722546] __x64_sys_munmap+0x59/0x80 [ 39.723084] do_syscall_64+0x3f/0x90 [ 39.723599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.724292] [ 39.724525] The buggy address belongs to the object at ffff88800de013a0 [ 39.724525] which belongs to the cache vm_area_struct of size 168 [ 39.726113] The buggy address is located 88 bytes inside of [ 39.726113] freed 168-byte region [ffff88800de013a0, ffff88800de01448) [ 39.727640] [ 39.727872] The buggy address belongs to the physical page: [ 39.728588] page:000000006695a631 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde01 [ 39.729773] memcg:ffff88800dfe1b01 [ 39.730258] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.731025] page_type: 0xffffffff() [ 39.731519] raw: 0100000000000200 ffff88800879fc80 ffffea0000358f40 dead000000000005 [ 39.732534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfe1b01 [ 39.733537] page dumped because: kasan: bad access detected [ 39.734258] [ 39.734497] Memory state around the buggy address: [ 39.735128] ffff88800de01280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.736072] ffff88800de01300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.737007] >ffff88800de01380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.737951] ^ [ 39.738882] ffff88800de01400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.739814] ffff88800de01480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.740753] ================================================================== [ 39.741908] Disabling lock debugging due to kernel taint [ 42.331317] BUG: Bad rss-counter state mm:00000000d8dcf663 type:MM_FILEPAGES val:33 [ 42.332526] BUG: Bad rss-counter state mm:00000000d8dcf663 type:MM_ANONPAGES val:22 [ 42.774420] BUG: Bad rss-counter state mm:000000002a3fe435 type:MM_FILEPAGES val:33 [ 42.776149] BUG: Bad rss-counter state mm:000000002a3fe435 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38119' (ECDSA) to the list of known hosts. 2023/06/19 12:51:57 fuzzer started 2023/06/19 12:51:57 dialing manager at localhost:44161 2023/06/19 12:51:57 checking machine... 2023/06/19 12:51:57 checking revisions... [ 43.535636] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:51:58 testing simple program... [ 43.581474] cgroup: Unknown subsys name 'net' [ 43.622773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:51:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888015980000 RSI=ffffffff8140d864 RDI=ffff888016657d10 RBP=ffff888016657d10 RSP=ffff888016657c70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=00000000ffffffff R15=00000000ffffffff RIP=ffffffff814c07e4 RFL=00000296 [--S-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 00007f2ee0382700 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=00007fffb47a55d8 CR3=0000000014722000 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=31353a3231203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323237 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=dffffc0000000000 RBX=ffffffff8460144a RCX=0000000000000001 RDX=1ffff11003033f41 RSI=ffff88801819ff40 RDI=ffffffff8460144a RBP=ffffffff8460144a RSP=ffff88801819f968 R8 =0000000000000001 R9 =ffff88801819f9f0 R10=0000000000038001 R11=00000000000b523e R12=ffff88801819fa78 R13=0000000000000000 R14=ffff88800e3f1b40 R15=ffff88800f66acf0 RIP=ffffffff811fc6f0 RFL=00000282 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f523fe87900 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=00007ffe20c46000 CR3=000000001befe000 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=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