syzkaller login: [ 38.759131] BUG: Bad rss-counter state mm:00000000af8479b8 type:MM_FILEPAGES val:33 [ 38.760835] BUG: Bad rss-counter state mm:00000000af8479b8 type:MM_ANONPAGES val:22 [ 38.927008] ================================================================== [ 38.927917] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.928854] Read of size 8 at addr ffff88800cceb058 by task sshd/219 [ 38.929624] [ 38.929841] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.930796] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.931776] Call Trace: [ 38.932120] [ 38.932411] dump_stack_lvl+0x91/0xf0 [ 38.932903] print_report+0xcc/0x620 [ 38.933389] ? __virt_addr_valid+0x102/0x340 [ 38.933933] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.934557] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.935170] kasan_report+0xbe/0xf0 [ 38.935658] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.936271] vma_interval_tree_remove+0xc75/0xec0 [ 38.936869] vma_prepare+0xc54/0x11a0 [ 38.937348] __split_vma+0x5af/0x950 [ 38.937816] ? __pfx___split_vma+0x10/0x10 [ 38.938340] ? find_held_lock+0x2c/0x110 [ 38.938868] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.939445] ? lock_is_held_type+0x9f/0x120 [ 38.940088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.940682] ? mtree_range_walk+0x632/0x900 [ 38.941227] ? mas_walk+0x5c7/0x7c0 [ 38.941695] do_vmi_munmap+0x1f1/0x2b0 [ 38.942174] mmap_region+0x1f9/0x2660 [ 38.942659] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.943152] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.943844] ? __pfx_lock_acquire+0x10/0x10 [ 38.944362] ? __pfx_mmap_region+0x10/0x10 [ 38.944875] ? security_mmap_addr+0x7d/0xa0 [ 38.945389] ? get_unmapped_area+0x1f5/0x3f0 [ 38.945923] do_mmap+0x854/0xf00 [ 38.946349] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.946848] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.947392] ksys_mmap_pgoff+0x3af/0x500 [ 38.947885] do_syscall_64+0x3f/0x90 [ 38.948348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.948983] RIP: 0033:0x7fd23cae5d82 [ 38.949430] 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 [ 38.951479] RSP: 002b:00007fff2bb95488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.952361] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd23cae5d82 [ 38.953208] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd23bf1f000 [ 38.954054] RBP: 00007fd23bf1f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.954917] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c511e59ec0 [ 38.955765] R13: 00007fff2bb954a0 R14: 00007fff2bb954d0 R15: 00007fff2bb95830 [ 38.956623] [ 38.956916] [ 38.957130] Allocated by task 212: [ 38.957560] kasan_save_stack+0x22/0x50 [ 38.958068] kasan_set_track+0x25/0x30 [ 38.958575] __kasan_slab_alloc+0x59/0x70 [ 38.959098] kmem_cache_alloc+0x16b/0x370 [ 38.959614] vm_area_dup+0x20/0x160 [ 38.960068] __split_vma+0x170/0x950 [ 38.960536] split_vma+0xc6/0x110 [ 38.960977] mprotect_fixup+0x8d2/0xb30 [ 38.961482] do_mprotect_pkey+0x87e/0xd40 [ 38.962003] __x64_sys_mprotect+0x78/0xc0 [ 38.962537] do_syscall_64+0x3f/0x90 [ 38.963013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.963661] [ 38.963876] Freed by task 212: [ 38.964268] kasan_save_stack+0x22/0x50 [ 38.964771] kasan_set_track+0x25/0x30 [ 38.965265] kasan_save_free_info+0x2b/0x50 [ 38.965799] __kasan_slab_free+0x10a/0x190 [ 38.966334] kmem_cache_free+0x10d/0x4d0 [ 38.966872] rcu_core+0x8c8/0x2860 [ 38.967317] __do_softirq+0x1b7/0x7d4 [ 38.967803] [ 38.968020] Last potentially related work creation: [ 38.968606] kasan_save_stack+0x22/0x50 [ 38.969109] __kasan_record_aux_stack+0x8e/0xa0 [ 38.969684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.970333] remove_vma+0x139/0x170 [ 38.970799] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.971358] do_vmi_munmap+0x1f1/0x2b0 [ 38.971844] __vm_munmap+0x138/0x3a0 [ 38.972313] __x64_sys_munmap+0x59/0x80 [ 38.972810] do_syscall_64+0x3f/0x90 [ 38.973294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.973945] [ 38.974160] The buggy address belongs to the object at ffff88800cceb000 [ 38.974160] which belongs to the cache vm_area_struct of size 168 [ 38.975644] The buggy address is located 88 bytes inside of [ 38.975644] freed 168-byte region [ffff88800cceb000, ffff88800cceb0a8) [ 38.977052] [ 38.977267] The buggy address belongs to the physical page: [ 38.977925] page:0000000076682fbd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcceb [ 38.979017] memcg:ffff88800d04d801 [ 38.979442] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.980086] page_type: 0xffffffff() [ 38.980539] raw: 0100000000000200 ffff8880087a0c80 ffffea000040a800 dead000000000004 [ 38.981471] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d04d801 [ 38.982385] page dumped because: kasan: bad access detected [ 38.983049] [ 38.983266] Memory state around the buggy address: [ 38.983847] ffff88800cceaf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 38.984701] ffff88800cceaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.985555] >ffff88800cceb000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.986419] ^ [ 38.987145] ffff88800cceb080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.987999] ffff88800cceb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.988851] ================================================================== [ 38.989828] Disabling lock debugging due to kernel taint [ 41.020222] BUG: Bad rss-counter state mm:000000009ec019b9 type:MM_FILEPAGES val:33 [ 41.021220] BUG: Bad rss-counter state mm:000000009ec019b9 type:MM_ANONPAGES val:22 [ 41.481739] BUG: Bad rss-counter state mm:000000001141ac4e type:MM_FILEPAGES val:33 [ 41.483356] BUG: Bad rss-counter state mm:000000001141ac4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26104' (ECDSA) to the list of known hosts. 2023/06/21 06:01:51 fuzzer started 2023/06/21 06:01:51 dialing manager at localhost:36067 2023/06/21 06:01:51 checking machine... 2023/06/21 06:01:51 checking revisions... [ 42.232221] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:01:52 testing simple program... [ 42.288691] cgroup: Unknown subsys name 'net' [ 42.383938] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:01:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880102e7490 RCX=0000000000000001 RDX=1ffff1100205ce94 RSI=ffff8880102e7a30 RDI=ffff8880102e74a0 RBP=ffff8880102e7a30 RSP=ffff8880102e73e8 R8 =ffffffff86129566 R9 =ffff8880102e74d0 R10=0000000000038001 R11=000000000001e40f R12=0000000000000008 R13=ffff8880102e0000 R14=ffff8880102e7a38 R15=ffff8880102e7490 RIP=ffffffff8113046e 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=00007f73ba875080 CR3=000000000e6fe000 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=756e696c2d34365f3638782f62696c2f XMM01=382d326572637062696c2f756e672d78 XMM02=00302e6f732e382d326572637062696c XMM03=2f756e672d78756e696c2d34365f3638 XMM04=00000000000000000000000000000000 XMM05=00007f0e03e95f6000007f0e03c78f30 XMM06=00007f0e03c78a2000007f0e03c78510 XMM07=00007f0e03c7800000007f0e03e96a20 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860a1201 RDX=1ffff110011c6f37 RSI=ffffffff8121b48b RDI=ffff888008e37958 RBP=ffff888008e379b0 RSP=ffff888008e378e8 R8 =ffffffff860a12fa R9 =ffff888008e37998 R10=0000000000038001 R11=00000000000078fb R12=ffff888008e379b8 R13=ffff888008e379a0 R14=ffff888008e0d1c0 R15=ffff888008e37958 RIP=ffffffff81130682 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 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=00007ffde4999000 CR3=000000000d6d0000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=682073253d65786520227325223d7463 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000