syzkaller login: [ 32.685392] BUG: Bad rss-counter state mm:00000000c2038d4e type:MM_FILEPAGES val:33 [ 32.686887] BUG: Bad rss-counter state mm:00000000c2038d4e type:MM_ANONPAGES val:22 [ 32.859935] ================================================================== [ 32.861174] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.862578] Read of size 8 at addr ffff88801a2ee968 by task sshd/220 [ 32.863638] [ 32.863933] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.865142] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.866312] Call Trace: [ 32.866683] [ 32.867016] dump_stack_lvl+0x91/0xf0 [ 32.867590] print_report+0xcc/0x620 [ 32.868156] ? __virt_addr_valid+0x102/0x340 [ 32.868801] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.869516] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.870235] kasan_report+0xbe/0xf0 [ 32.870785] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.871507] vma_interval_tree_remove+0xc75/0xec0 [ 32.872210] vma_prepare+0xc54/0x11a0 [ 32.872768] __split_vma+0x5af/0x950 [ 32.873316] ? __pfx___split_vma+0x10/0x10 [ 32.873943] ? find_held_lock+0x2c/0x110 [ 32.874553] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.875211] ? lock_is_held_type+0x9f/0x120 [ 32.875835] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.876532] ? mtree_range_walk+0x632/0x900 [ 32.877166] ? mas_walk+0x5c7/0x7c0 [ 32.877712] do_vmi_munmap+0x1f1/0x2b0 [ 32.878281] mmap_region+0x1f9/0x2660 [ 32.878842] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.879435] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.880254] ? __pfx_lock_acquire+0x10/0x10 [ 32.880869] ? __pfx_mmap_region+0x10/0x10 [ 32.881490] ? security_mmap_addr+0x7d/0xa0 [ 32.882131] ? get_unmapped_area+0x1f5/0x3f0 [ 32.882770] do_mmap+0x854/0xf00 [ 32.883275] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.883850] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.884504] ksys_mmap_pgoff+0x3af/0x500 [ 32.885085] do_syscall_64+0x3f/0x90 [ 32.885637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.886401] RIP: 0033:0x7f528fc45d82 [ 32.886921] 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 [ 32.889412] RSP: 002b:00007ffd7c021d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.890472] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f528fc45d82 [ 32.891468] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f528f07f000 [ 32.892431] RBP: 00007f528f07f000 R08: 0000000000000009 R09: 0000000000001000 [ 32.893423] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559acf151ec0 [ 32.894540] R13: 00007ffd7c021d20 R14: 00007ffd7c021d50 R15: 00007ffd7c0220b0 [ 32.895605] [ 32.895964] [ 32.896228] Allocated by task 213: [ 32.896751] kasan_save_stack+0x22/0x50 [ 32.897367] kasan_set_track+0x25/0x30 [ 32.897999] __kasan_slab_alloc+0x59/0x70 [ 32.898587] kmem_cache_alloc+0x16b/0x370 [ 32.899106] vm_area_dup+0x20/0x160 [ 32.899565] __split_vma+0x170/0x950 [ 32.900034] split_vma+0xc6/0x110 [ 32.900478] mprotect_fixup+0x8d2/0xb30 [ 32.900986] do_mprotect_pkey+0x87e/0xd40 [ 32.901520] __x64_sys_mprotect+0x78/0xc0 [ 32.902097] do_syscall_64+0x3f/0x90 [ 32.902571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.903220] [ 32.903434] Freed by task 19: [ 32.903826] kasan_save_stack+0x22/0x50 [ 32.904334] kasan_set_track+0x25/0x30 [ 32.904832] kasan_save_free_info+0x2b/0x50 [ 32.905366] __kasan_slab_free+0x10a/0x190 [ 32.905911] kmem_cache_free+0x10d/0x4d0 [ 32.906421] rcu_core+0x8c8/0x2860 [ 32.906870] __do_softirq+0x1b7/0x7d4 [ 32.907353] [ 32.907568] Last potentially related work creation: [ 32.908154] kasan_save_stack+0x22/0x50 [ 32.908662] __kasan_record_aux_stack+0x8e/0xa0 [ 32.909236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.909903] remove_vma+0x139/0x170 [ 32.910355] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.910921] do_vmi_munmap+0x1f1/0x2b0 [ 32.911414] __vm_munmap+0x138/0x3a0 [ 32.911882] __x64_sys_munmap+0x59/0x80 [ 32.912375] do_syscall_64+0x3f/0x90 [ 32.912860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.913503] [ 32.913716] The buggy address belongs to the object at ffff88801a2ee910 [ 32.913716] which belongs to the cache vm_area_struct of size 168 [ 32.915186] The buggy address is located 88 bytes inside of [ 32.915186] freed 168-byte region [ffff88801a2ee910, ffff88801a2ee9b8) [ 32.916590] [ 32.916805] The buggy address belongs to the physical page: [ 32.917483] page:00000000696b9ca1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2ee [ 32.918578] memcg:ffff88800f648801 [ 32.919005] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.919662] page_type: 0xffffffff() [ 32.920125] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.921047] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f648801 [ 32.921976] page dumped because: kasan: bad access detected [ 32.922639] [ 32.922855] Memory state around the buggy address: [ 32.923435] ffff88801a2ee800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.924294] ffff88801a2ee880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.925153] >ffff88801a2ee900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.926010] ^ [ 32.926806] ffff88801a2ee980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.927657] ffff88801a2eea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.928510] ================================================================== [ 32.929610] Disabling lock debugging due to kernel taint [ 34.908579] BUG: Bad rss-counter state mm:0000000063aea330 type:MM_FILEPAGES val:33 [ 34.909756] BUG: Bad rss-counter state mm:0000000063aea330 type:MM_ANONPAGES val:22 [ 35.365562] BUG: Bad rss-counter state mm:000000009bf4d19a type:MM_FILEPAGES val:33 [ 35.366805] BUG: Bad rss-counter state mm:000000009bf4d19a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2496' (ECDSA) to the list of known hosts. 2023/06/20 00:50:50 fuzzer started 2023/06/20 00:50:50 dialing manager at localhost:44161 2023/06/20 00:50:50 checking machine... 2023/06/20 00:50:50 checking revisions... [ 36.013036] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:50:50 testing simple program... [ 36.062850] cgroup: Unknown subsys name 'net' [ 36.118540] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:50:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81412b56 RDX=ffff8880147a8000 RSI=0000000000000100 RDI=0000000000000001 RBP=0000000000000001 RSP=ffff88806ce09d20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=1ffff1100d9c7479 R12=0000000000000001 R13=ffffffff8124d5f1 R14=ffff888008d71b54 R15=0000000000000000 RIP=ffffffff814c07e0 RFL=00000002 [-------] 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 00007fc5ca931900 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=00007fc5c9d3c440 CR3=000000000d566000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=bf8b4a00ff2f666d00000000000ae988 XMM05=e7fc6fc9a33778400000000000134c58 XMM06=4fda316b135da52b0000000000133cf8 XMM07=fb795ef6d65770560000000000124300 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=7fffffffffffffff RBX=0000559f2e921f80 RCX=0000000000000007 RDX=00000000000009b9 RSI=000000000000000a RDI=0000559f2e930ba0 RBP=00007ffc3f6754c0 RSP=00007ffc3f675460 R8 =0000559f2e930ba7 R9 =00007fe4a48ccbe0 R10=0000000000000100 R11=0000000000000246 R12=00007fe4a431a900 R13=0000559f2e930bba R14=0000000000000014 R15=0000000000000000 RIP=00007fe4a4783833 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe4a431a900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc3f66f000 CR3=000000000ff46000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=000000000000000000ff000000000000 XMM02=00000000000000000000000000000000 XMM03=00303030303609090958414d5f444947 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=000000000000000000ffffffffffffff XMM08=746e756f636361206d65747379532023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000