syzkaller login: [ 30.688828] BUG: Bad rss-counter state mm:00000000e1036086 type:MM_FILEPAGES val:33 [ 30.689775] BUG: Bad rss-counter state mm:00000000e1036086 type:MM_ANONPAGES val:22 [ 30.886412] ================================================================== [ 30.887596] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.888926] Read of size 8 at addr ffff88801a2a2880 by task sshd/221 [ 30.889772] [ 30.890006] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.890997] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.892091] Call Trace: [ 30.892436] [ 30.892741] dump_stack_lvl+0x91/0xf0 [ 30.893273] print_report+0xcc/0x620 [ 30.893794] ? __virt_addr_valid+0x102/0x340 [ 30.894413] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.895081] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.895760] kasan_report+0xbe/0xf0 [ 30.896299] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.896982] vma_interval_tree_remove+0xc75/0xec0 [ 30.897636] vma_prepare+0xc54/0x11a0 [ 30.898155] __split_vma+0x5af/0x950 [ 30.898664] ? __pfx___split_vma+0x10/0x10 [ 30.899235] ? find_held_lock+0x2c/0x110 [ 30.899818] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.900442] ? lock_is_held_type+0x9f/0x120 [ 30.901024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.901665] ? mtree_range_walk+0x632/0x900 [ 30.902257] ? mas_walk+0x5c7/0x7c0 [ 30.902768] do_vmi_munmap+0x1f1/0x2b0 [ 30.903292] mmap_region+0x1f9/0x2660 [ 30.903805] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.904367] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.905134] ? __pfx_lock_acquire+0x10/0x10 [ 30.905703] ? __pfx_mmap_region+0x10/0x10 [ 30.906263] ? security_mmap_addr+0x7d/0xa0 [ 30.906837] ? get_unmapped_area+0x1f5/0x3f0 [ 30.907422] do_mmap+0x854/0xf00 [ 30.907890] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.908421] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.909024] ksys_mmap_pgoff+0x3af/0x500 [ 30.909568] do_syscall_64+0x3f/0x90 [ 30.910075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.910768] RIP: 0033:0x7fa3647e9d82 [ 30.911263] 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 [ 30.913550] RSP: 002b:00007fffe0b5fc48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.914511] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa3647e9d82 [ 30.915411] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa363c23000 [ 30.916321] RBP: 00007fa363c23000 R08: 0000000000000009 R09: 0000000000001000 [ 30.917221] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a2a500ec0 [ 30.918121] R13: 00007fffe0b5fc60 R14: 00007fffe0b5fc90 R15: 00007fffe0b5fff0 [ 30.919034] [ 30.919347] [ 30.919575] Allocated by task 214: [ 30.920054] kasan_save_stack+0x22/0x50 [ 30.920609] kasan_set_track+0x25/0x30 [ 30.921137] __kasan_slab_alloc+0x59/0x70 [ 30.921690] kmem_cache_alloc+0x16b/0x370 [ 30.922237] vm_area_dup+0x20/0x160 [ 30.922712] __split_vma+0x170/0x950 [ 30.923198] split_vma+0xc6/0x110 [ 30.923659] mprotect_fixup+0x8d2/0xb30 [ 30.924208] do_mprotect_pkey+0x87e/0xd40 [ 30.924763] __x64_sys_mprotect+0x78/0xc0 [ 30.925308] do_syscall_64+0x3f/0x90 [ 30.925820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.926493] [ 30.926717] Freed by task 214: [ 30.927128] kasan_save_stack+0x22/0x50 [ 30.927658] kasan_set_track+0x25/0x30 [ 30.928196] kasan_save_free_info+0x2b/0x50 [ 30.928754] __kasan_slab_free+0x10a/0x190 [ 30.929314] kmem_cache_free+0x10d/0x4d0 [ 30.929844] rcu_core+0x8c8/0x2860 [ 30.930312] __do_softirq+0x1b7/0x7d4 [ 30.930812] [ 30.931039] Last potentially related work creation: [ 30.931651] kasan_save_stack+0x22/0x50 [ 30.932186] __kasan_record_aux_stack+0x8e/0xa0 [ 30.932792] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.933467] remove_vma+0x139/0x170 [ 30.933942] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.934531] do_vmi_munmap+0x1f1/0x2b0 [ 30.935041] __vm_munmap+0x138/0x3a0 [ 30.935534] __x64_sys_munmap+0x59/0x80 [ 30.936064] do_syscall_64+0x3f/0x90 [ 30.936565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.937242] [ 30.937470] The buggy address belongs to the object at ffff88801a2a2828 [ 30.937470] which belongs to the cache vm_area_struct of size 168 [ 30.939014] The buggy address is located 88 bytes inside of [ 30.939014] freed 168-byte region [ffff88801a2a2828, ffff88801a2a28d0) [ 30.940506] [ 30.940734] The buggy address belongs to the physical page: [ 30.941417] page:0000000028331ec6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2a2 [ 30.942579] memcg:ffff88800f243201 [ 30.943038] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.943743] page_type: 0xffffffff() [ 30.944238] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.945231] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f243201 [ 30.946210] page dumped because: kasan: bad access detected [ 30.946920] [ 30.947151] Memory state around the buggy address: [ 30.947775] ffff88801a2a2780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.948700] ffff88801a2a2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.949621] >ffff88801a2a2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.950535] ^ [ 30.950978] ffff88801a2a2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.951891] ffff88801a2a2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.952826] ================================================================== [ 30.953918] Disabling lock debugging due to kernel taint [ 33.164813] BUG: Bad rss-counter state mm:0000000045a6c0d4 type:MM_FILEPAGES val:33 [ 33.165914] BUG: Bad rss-counter state mm:0000000045a6c0d4 type:MM_ANONPAGES val:22 [ 33.603931] BUG: Bad rss-counter state mm:00000000a5ce5df7 type:MM_FILEPAGES val:33 [ 33.605862] BUG: Bad rss-counter state mm:00000000a5ce5df7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4128' (ECDSA) to the list of known hosts. 2023/06/21 04:50:47 fuzzer started 2023/06/21 04:50:47 dialing manager at localhost:36067 2023/06/21 04:50:47 checking machine... 2023/06/21 04:50:47 checking revisions... [ 34.332048] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:50:47 testing simple program... [ 34.380335] cgroup: Unknown subsys name 'net' [ 34.436784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:50:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f5a78e7a900 RCX=ffffffff8107f98e RDX=1ffff11002dfb625 RSI=0000000000000008 RDI=ffff888016fdb128 RBP=ffff88800fab0000 RSP=ffff8880103cf9d0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888016fd9b40 R13=0000000000000000 R14=ffff888016fdb100 R15=ffff888016fdb1c0 RIP=ffffffff8450ce56 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 00007f5a78e7a900 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=00007f5a7942f650 CR3=000000000d444000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffc0bc45e88 CR3=000000001694a000 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=2037343a30353a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a30353a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000