syzkaller login: [ 38.735961] BUG: Bad rss-counter state mm:00000000a9da8faa type:MM_FILEPAGES val:33 [ 38.737091] BUG: Bad rss-counter state mm:00000000a9da8faa type:MM_ANONPAGES val:22 [ 38.910399] ================================================================== [ 38.911877] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.913251] Read of size 8 at addr ffff88800d825b38 by task sshd/219 [ 38.914218] [ 38.914439] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.915367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.916360] Call Trace: [ 38.916686] [ 38.916997] dump_stack_lvl+0x91/0xf0 [ 38.917509] print_report+0xcc/0x620 [ 38.918088] ? __virt_addr_valid+0x102/0x340 [ 38.918688] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.919344] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.919961] kasan_report+0xbe/0xf0 [ 38.920450] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.921070] vma_interval_tree_remove+0xc75/0xec0 [ 38.921672] vma_prepare+0xc54/0x11a0 [ 38.922160] __split_vma+0x5af/0x950 [ 38.922633] ? __pfx___split_vma+0x10/0x10 [ 38.923178] ? find_held_lock+0x2c/0x110 [ 38.923714] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.924286] ? lock_is_held_type+0x9f/0x120 [ 38.924852] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.925474] ? mtree_range_walk+0x632/0x900 [ 38.926034] ? mas_walk+0x5c7/0x7c0 [ 38.926521] do_vmi_munmap+0x1f1/0x2b0 [ 38.927040] mmap_region+0x1f9/0x2660 [ 38.927524] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.928053] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.928765] ? __pfx_lock_acquire+0x10/0x10 [ 38.929299] ? __pfx_mmap_region+0x10/0x10 [ 38.929837] ? security_mmap_addr+0x7d/0xa0 [ 38.930377] ? get_unmapped_area+0x1f5/0x3f0 [ 38.930950] do_mmap+0x854/0xf00 [ 38.931396] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.931890] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.932469] ksys_mmap_pgoff+0x3af/0x500 [ 38.932981] do_syscall_64+0x3f/0x90 [ 38.933461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.934158] RIP: 0033:0x7f47e9972d82 [ 38.934625] 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 [ 38.936808] RSP: 002b:00007ffee11044b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.937720] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47e9972d82 [ 38.938643] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47e8dac000 [ 38.939537] RBP: 00007f47e8dac000 R08: 0000000000000009 R09: 0000000000001000 [ 38.940406] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557501464ec0 [ 38.941275] R13: 00007ffee11044d0 R14: 00007ffee1104500 R15: 00007ffee1104860 [ 38.942178] [ 38.942478] [ 38.942697] Allocated by task 212: [ 38.943145] kasan_save_stack+0x22/0x50 [ 38.943660] kasan_set_track+0x25/0x30 [ 38.944165] __kasan_slab_alloc+0x59/0x70 [ 38.944705] kmem_cache_alloc+0x16b/0x370 [ 38.945221] vm_area_dup+0x20/0x160 [ 38.945683] __split_vma+0x170/0x950 [ 38.946168] split_vma+0xc6/0x110 [ 38.946612] mprotect_fixup+0x8d2/0xb30 [ 38.947142] do_mprotect_pkey+0x87e/0xd40 [ 38.947663] __x64_sys_mprotect+0x78/0xc0 [ 38.948190] do_syscall_64+0x3f/0x90 [ 38.948669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949317] [ 38.949538] Freed by task 212: [ 38.949932] kasan_save_stack+0x22/0x50 [ 38.950443] kasan_set_track+0x25/0x30 [ 38.950969] kasan_save_free_info+0x2b/0x50 [ 38.951508] __kasan_slab_free+0x10a/0x190 [ 38.952047] kmem_cache_free+0x10d/0x4d0 [ 38.952573] rcu_core+0x8c8/0x2860 [ 38.953017] __do_softirq+0x1b7/0x7d4 [ 38.953506] [ 38.953721] Last potentially related work creation: [ 38.954309] kasan_save_stack+0x22/0x50 [ 38.954830] __kasan_record_aux_stack+0x8e/0xa0 [ 38.955415] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.956068] remove_vma+0x139/0x170 [ 38.956534] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.957110] do_vmi_munmap+0x1f1/0x2b0 [ 38.957609] __vm_munmap+0x138/0x3a0 [ 38.958091] __x64_sys_munmap+0x59/0x80 [ 38.958605] do_syscall_64+0x3f/0x90 [ 38.959115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.959764] [ 38.959988] Second to last potentially related work creation: [ 38.960679] kasan_save_stack+0x22/0x50 [ 38.961196] __kasan_record_aux_stack+0x8e/0xa0 [ 38.961784] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.962449] remove_vma+0x139/0x170 [ 38.962925] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.963504] do_vmi_munmap+0x1f1/0x2b0 [ 38.964011] mmap_region+0x1f9/0x2660 [ 38.964496] do_mmap+0x854/0xf00 [ 38.964938] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.965440] ksys_mmap_pgoff+0x3af/0x500 [ 38.965954] do_syscall_64+0x3f/0x90 [ 38.966446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.967117] [ 38.967341] The buggy address belongs to the object at ffff88800d825ae0 [ 38.967341] which belongs to the cache vm_area_struct of size 168 [ 38.968838] The buggy address is located 88 bytes inside of [ 38.968838] freed 168-byte region [ffff88800d825ae0, ffff88800d825b88) [ 38.970275] [ 38.970493] The buggy address belongs to the physical page: [ 38.971183] page:00000000823ea286 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd825 [ 38.972278] memcg:ffff88800da08f01 [ 38.972704] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.973410] page_type: 0xffffffff() [ 38.973867] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.974797] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da08f01 [ 38.975719] page dumped because: kasan: bad access detected [ 38.976395] [ 38.976618] Memory state around the buggy address: [ 38.977203] ffff88800d825a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.978060] ffff88800d825a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.978942] >ffff88800d825b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.979801] ^ [ 38.980417] ffff88800d825b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.981320] ffff88800d825c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.982188] ================================================================== [ 38.983281] Disabling lock debugging due to kernel taint [ 40.968170] BUG: Bad rss-counter state mm:00000000b7c827f5 type:MM_FILEPAGES val:33 [ 40.969130] BUG: Bad rss-counter state mm:00000000b7c827f5 type:MM_ANONPAGES val:22 [ 41.507262] BUG: Bad rss-counter state mm:000000004fee4e56 type:MM_FILEPAGES val:33 [ 41.508434] BUG: Bad rss-counter state mm:000000004fee4e56 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46920' (ECDSA) to the list of known hosts. 2023/06/20 13:36:44 fuzzer started 2023/06/20 13:36:44 dialing manager at localhost:36067 2023/06/20 13:36:44 checking machine... 2023/06/20 13:36:44 checking revisions... [ 42.118659] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:36:44 testing simple program... [ 42.171548] cgroup: Unknown subsys name 'net' [ 42.258782] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:36:44 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 0000000000000000 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=00007ffd94461ae8 CR3=000000000ef64000 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=2034343a36333a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a36333a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861436da RDX=1ffff11003401f0e RSI=ffff88801a00fe28 RDI=ffff88801a00f870 RBP=ffff88801a00fe28 RSP=ffff88801a00f7d8 R8 =0000000000000001 R9 =ffff88801a00f8b0 R10=0000000000038001 R11=00000000000229a3 R12=0000000000000008 R13=ffff88801a00f8b8 R14=ffff88801a00fe28 R15=ffff88801a00f870 RIP=ffffffff8113040e 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 00007fee08c45900 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=00007fee091fc618 CR3=000000000dc7c000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000