syzkaller login: [ 31.150029] BUG: Bad rss-counter state mm:00000000cbf75569 type:MM_FILEPAGES val:33 [ 31.151484] BUG: Bad rss-counter state mm:00000000cbf75569 type:MM_ANONPAGES val:22 [ 31.327181] ================================================================== [ 31.328166] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.329168] Read of size 8 at addr ffff888014665ed8 by task sshd/219 [ 31.330172] [ 31.330411] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.331334] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.332404] Call Trace: [ 31.332747] [ 31.333056] dump_stack_lvl+0x91/0xf0 [ 31.333587] print_report+0xcc/0x620 [ 31.334121] ? __virt_addr_valid+0x102/0x340 [ 31.334724] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.335409] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336088] kasan_report+0xbe/0xf0 [ 31.336609] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.337292] vma_interval_tree_remove+0xc75/0xec0 [ 31.337990] vma_prepare+0xc54/0x11a0 [ 31.338521] __split_vma+0x5af/0x950 [ 31.339047] ? __pfx___split_vma+0x10/0x10 [ 31.339625] ? find_held_lock+0x2c/0x110 [ 31.340207] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.340833] ? lock_is_held_type+0x9f/0x120 [ 31.341434] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.342112] ? mtree_range_walk+0x632/0x900 [ 31.342724] ? mas_walk+0x5c7/0x7c0 [ 31.343252] do_vmi_munmap+0x1f1/0x2b0 [ 31.343799] mmap_region+0x1f9/0x2660 [ 31.344354] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.344923] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.345726] ? __pfx_lock_acquire+0x10/0x10 [ 31.346321] ? __pfx_mmap_region+0x10/0x10 [ 31.346909] ? security_mmap_addr+0x7d/0xa0 [ 31.347498] ? get_unmapped_area+0x1f5/0x3f0 [ 31.348111] do_mmap+0x854/0xf00 [ 31.348601] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.349150] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.349794] ksys_mmap_pgoff+0x3af/0x500 [ 31.350362] do_syscall_64+0x3f/0x90 [ 31.350898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.351619] RIP: 0033:0x7f67c9a57d82 [ 31.352128] 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 [ 31.354497] RSP: 002b:00007fff94df10e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.355507] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f67c9a57d82 [ 31.356453] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f67c8e91000 [ 31.357404] RBP: 00007f67c8e91000 R08: 0000000000000009 R09: 0000000000001000 [ 31.358351] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1ebeb9ec0 [ 31.359298] R13: 00007fff94df1100 R14: 00007fff94df1130 R15: 00007fff94df1490 [ 31.360250] [ 31.360574] [ 31.360811] Allocated by task 212: [ 31.361290] kasan_save_stack+0x22/0x50 [ 31.361873] kasan_set_track+0x25/0x30 [ 31.362424] __kasan_slab_alloc+0x59/0x70 [ 31.363010] kmem_cache_alloc+0x16b/0x370 [ 31.363585] vm_area_dup+0x20/0x160 [ 31.364090] __split_vma+0x170/0x950 [ 31.364610] split_vma+0xc6/0x110 [ 31.365100] mprotect_fixup+0x8d2/0xb30 [ 31.365668] do_mprotect_pkey+0x87e/0xd40 [ 31.366254] __x64_sys_mprotect+0x78/0xc0 [ 31.366835] do_syscall_64+0x3f/0x90 [ 31.367363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.368077] [ 31.368318] Freed by task 212: [ 31.368754] kasan_save_stack+0x22/0x50 [ 31.369315] kasan_set_track+0x25/0x30 [ 31.369880] kasan_save_free_info+0x2b/0x50 [ 31.370474] __kasan_slab_free+0x10a/0x190 [ 31.371068] kmem_cache_free+0x10d/0x4d0 [ 31.371707] rcu_core+0x8c8/0x2860 [ 31.372204] __do_softirq+0x1b7/0x7d4 [ 31.372735] [ 31.372975] Last potentially related work creation: [ 31.373635] kasan_save_stack+0x22/0x50 [ 31.374201] __kasan_record_aux_stack+0x8e/0xa0 [ 31.374839] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.375552] remove_vma+0x139/0x170 [ 31.376056] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.376676] do_vmi_munmap+0x1f1/0x2b0 [ 31.377217] __vm_munmap+0x138/0x3a0 [ 31.377760] __x64_sys_munmap+0x59/0x80 [ 31.378302] do_syscall_64+0x3f/0x90 [ 31.378830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.379548] [ 31.379788] The buggy address belongs to the object at ffff888014665e80 [ 31.379788] which belongs to the cache vm_area_struct of size 168 [ 31.381403] The buggy address is located 88 bytes inside of [ 31.381403] freed 168-byte region [ffff888014665e80, ffff888014665f28) [ 31.382972] [ 31.383212] The buggy address belongs to the physical page: [ 31.383951] page:000000009cc9711d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14665 [ 31.385172] memcg:ffff88800df13d01 [ 31.385653] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.386372] page_type: 0xffffffff() [ 31.386875] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.387902] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df13d01 [ 31.388907] page dumped because: kasan: bad access detected [ 31.389657] [ 31.389896] Memory state around the buggy address: [ 31.390540] ffff888014665d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.391494] ffff888014665e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.392452] >ffff888014665e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.393405] ^ [ 31.394228] ffff888014665f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.395184] ffff888014665f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.396138] ================================================================== [ 31.397217] Disabling lock debugging due to kernel taint [ 33.893071] BUG: Bad rss-counter state mm:000000000e8fa7ef type:MM_FILEPAGES val:33 [ 33.894085] BUG: Bad rss-counter state mm:000000000e8fa7ef type:MM_ANONPAGES val:22 [ 34.297739] BUG: Bad rss-counter state mm:000000004658d929 type:MM_FILEPAGES val:33 [ 34.298933] BUG: Bad rss-counter state mm:000000004658d929 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27120' (ECDSA) to the list of known hosts. 2023/06/20 04:07:27 fuzzer started 2023/06/20 04:07:28 dialing manager at localhost:44161 2023/06/20 04:07:28 checking machine... 2023/06/20 04:07:28 checking revisions... [ 35.002383] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:07:28 testing simple program... [ 35.051385] cgroup: Unknown subsys name 'net' [ 35.102694] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:07:27 Registers: info registers vcpu 0 RAX=1ffffffff0bbf943 RBX=ffffffff85dfca1c RCX=ffffffff8180c584 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfc9fc RSP=ffff88800e627870 R8 =ffffffff86137508 R9 =ffff88800e627968 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca3c R13=ffffffff85dfc9fc R14=ffffffff85dfc9fc R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007fd580daa900 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=00007fd5813620b0 CR3=000000000ff6c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f05c4fe8160 CR3=000000000f324000 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=0d8309ead412d286f34b6b98f2a90f90 XMM02=000000000011d400ec2efd57dc4c00df XMM03=00000000001240d07d429636ee6ede13 XMM04=77d7939731da729900000000000ae988 XMM05=dfcdbad4f1609c370000000000133bd0 XMM06=2feb5220732d72e10000000000132a38 XMM07=e042d86d42eb936e0000000000124350 XMM08=7d429636ee6ede13000000000011d460 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000