syzkaller login: [ 40.557384] BUG: Bad rss-counter state mm:00000000697f127f type:MM_FILEPAGES val:33 [ 40.558088] BUG: Bad rss-counter state mm:00000000697f127f type:MM_ANONPAGES val:22 [ 40.701636] ================================================================== [ 40.702236] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.702832] Read of size 8 at addr ffff888018d3f6b0 by task sshd/219 [ 40.703317] [ 40.703456] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.704006] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.704619] Call Trace: [ 40.704822] [ 40.705004] dump_stack_lvl+0x91/0xf0 [ 40.705356] print_report+0xcc/0x620 [ 40.705693] ? __virt_addr_valid+0x102/0x340 [ 40.706055] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.706443] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.706874] kasan_report+0xbe/0xf0 [ 40.707176] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.707570] vma_interval_tree_remove+0xc75/0xec0 [ 40.707976] vma_prepare+0xc54/0x11a0 [ 40.708280] __split_vma+0x5af/0x950 [ 40.708578] ? __pfx___split_vma+0x10/0x10 [ 40.708960] ? find_held_lock+0x2c/0x110 [ 40.709317] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.709864] ? lock_is_held_type+0x9f/0x120 [ 40.710339] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.711494] ? mtree_range_walk+0x632/0x900 [ 40.712460] ? mas_walk+0x5c7/0x7c0 [ 40.713327] do_vmi_munmap+0x1f1/0x2b0 [ 40.714193] mmap_region+0x1f9/0x2660 [ 40.715063] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.715995] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.717352] ? __pfx_lock_acquire+0x10/0x10 [ 40.718333] ? __pfx_mmap_region+0x10/0x10 [ 40.719457] ? security_mmap_addr+0x7d/0xa0 [ 40.720545] ? get_unmapped_area+0x1f5/0x3f0 [ 40.721682] do_mmap+0x854/0xf00 [ 40.722541] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.723528] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.724651] ksys_mmap_pgoff+0x3af/0x500 [ 40.725209] do_syscall_64+0x3f/0x90 [ 40.725541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.725989] RIP: 0033:0x7f684fdded82 [ 40.726304] 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 [ 40.727771] RSP: 002b:00007fffab582a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.728393] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f684fdded82 [ 40.728987] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f684f218000 [ 40.729593] RBP: 00007f684f218000 R08: 0000000000000009 R09: 0000000000001000 [ 40.730189] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563078452ec0 [ 40.730776] R13: 00007fffab582aa0 R14: 00007fffab582ad0 R15: 00007fffab582e30 [ 40.731371] [ 40.731576] [ 40.731743] Allocated by task 212: [ 40.732072] kasan_save_stack+0x22/0x50 [ 40.732424] kasan_set_track+0x25/0x30 [ 40.732779] __kasan_slab_alloc+0x59/0x70 [ 40.733157] kmem_cache_alloc+0x16b/0x370 [ 40.734373] vm_area_dup+0x20/0x160 [ 40.734717] __split_vma+0x170/0x950 [ 40.735015] split_vma+0xc6/0x110 [ 40.735294] mprotect_fixup+0x8d2/0xb30 [ 40.735662] do_mprotect_pkey+0x87e/0xd40 [ 40.735995] __x64_sys_mprotect+0x78/0xc0 [ 40.736326] do_syscall_64+0x3f/0x90 [ 40.736675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.737084] [ 40.737315] Freed by task 19: [ 40.737639] kasan_save_stack+0x22/0x50 [ 40.737960] kasan_set_track+0x25/0x30 [ 40.738272] kasan_save_free_info+0x2b/0x50 [ 40.738658] __kasan_slab_free+0x10a/0x190 [ 40.739002] kmem_cache_free+0x10d/0x4d0 [ 40.739326] rcu_core+0x8c8/0x2860 [ 40.739659] __do_softirq+0x1b7/0x7d4 [ 40.739974] [ 40.740113] Last potentially related work creation: [ 40.740534] kasan_save_stack+0x22/0x50 [ 40.740859] __kasan_record_aux_stack+0x8e/0xa0 [ 40.741244] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.741763] remove_vma+0x139/0x170 [ 40.742090] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.742556] do_vmi_munmap+0x1f1/0x2b0 [ 40.742900] __vm_munmap+0x138/0x3a0 [ 40.743225] __x64_sys_munmap+0x59/0x80 [ 40.743624] do_syscall_64+0x3f/0x90 [ 40.743950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.744435] [ 40.744589] Second to last potentially related work creation: [ 40.745063] kasan_save_stack+0x22/0x50 [ 40.745478] __kasan_record_aux_stack+0x8e/0xa0 [ 40.745879] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.746327] remove_vma+0x139/0x170 [ 40.746685] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.747121] do_vmi_munmap+0x1f1/0x2b0 [ 40.747539] mmap_region+0x1f9/0x2660 [ 40.747914] do_mmap+0x854/0xf00 [ 40.748208] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.748595] ksys_mmap_pgoff+0x3af/0x500 [ 40.748947] do_syscall_64+0x3f/0x90 [ 40.749282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.749782] [ 40.749934] The buggy address belongs to the object at ffff888018d3f658 [ 40.749934] which belongs to the cache vm_area_struct of size 168 [ 40.750957] The buggy address is located 88 bytes inside of [ 40.750957] freed 168-byte region [ffff888018d3f658, ffff888018d3f700) [ 40.751912] [ 40.752051] The buggy address belongs to the physical page: [ 40.752545] page:0000000027b502c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d3f [ 40.753251] memcg:ffff888015bbc901 [ 40.753599] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.754054] page_type: 0xffffffff() [ 40.754357] raw: 0100000000000200 ffff88800879fc80 ffffea00005a6500 dead000000000008 [ 40.755049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015bbc901 [ 40.755721] page dumped because: kasan: bad access detected [ 40.756146] [ 40.756282] Memory state around the buggy address: [ 40.756699] ffff888018d3f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.757595] ffff888018d3f600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 40.758140] >ffff888018d3f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.758815] ^ [ 40.759251] ffff888018d3f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.759929] ffff888018d3f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.760576] ================================================================== [ 40.765332] Disabling lock debugging due to kernel taint [ 42.943742] BUG: Bad rss-counter state mm:00000000cf2d1a31 type:MM_FILEPAGES val:33 [ 42.944353] BUG: Bad rss-counter state mm:00000000cf2d1a31 type:MM_ANONPAGES val:22 [ 44.945438] BUG: Bad rss-counter state mm:000000004a9370c2 type:MM_FILEPAGES val:33 [ 44.946171] BUG: Bad rss-counter state mm:000000004a9370c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46747' (ECDSA) to the list of known hosts. 2023/06/20 09:59:56 fuzzer started 2023/06/20 09:59:57 dialing manager at localhost:44161 2023/06/20 09:59:57 checking machine... 2023/06/20 09:59:57 checking revisions... [ 45.830816] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:59:57 testing simple program... [ 45.911997] cgroup: Unknown subsys name 'net' [ 45.999714] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:59:55 Registers: info registers vcpu 0 RAX=ffff888019c09bd0 RBX=0000000000000000 RCX=ffff88806c59bc10 RDX=0000000000000000 RSI=ffffffff846000aa RDI=0000000000000000 RBP=ffff88800879fdc0 RSP=ffff888017d8f8f8 R8 =000000004044cf01 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888019c09bd0 R13=0000000000000cc0 R14=0000000000000000 R15=0000000000000cc0 RIP=ffffffff8180cd0c 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa37bb76900 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=00007ffced898908 CR3=000000001581a000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c1a185 RBX=0000000000000001 RCX=ffffffff860d0c26 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff860d0c28 RBP=ffff888008e579a8 RSP=ffff888008e578e0 R8 =ffffffff860d0c2a R9 =ffff888008e57990 R10=0000000000038001 R11=000000000000fc0f R12=ffff888008e579b0 R13=ffff888008e57998 R14=ffff888008e57d10 R15=ffff888008e57950 RIP=ffffffff811311c7 RFL=00000212 [----A--] 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 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=00007f717b3ba328 CR3=00000000095e8000 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