syzkaller login: [ 68.778003] BUG: Bad rss-counter state mm:00000000c9d519f8 type:MM_FILEPAGES val:33 [ 68.779211] BUG: Bad rss-counter state mm:00000000c9d519f8 type:MM_ANONPAGES val:22 [ 68.939803] ================================================================== [ 68.940537] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.941303] Read of size 8 at addr ffff88800fd1f058 by task sshd/227 [ 68.941911] [ 68.942087] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.942790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.943682] Call Trace: [ 68.943953] [ 68.944181] dump_stack_lvl+0x91/0xf0 [ 68.944574] print_report+0xcc/0x620 [ 68.944959] ? __virt_addr_valid+0x102/0x340 [ 68.945432] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.945932] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.946419] kasan_report+0xbe/0xf0 [ 68.946811] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.947333] vma_interval_tree_remove+0xc75/0xec0 [ 68.947834] vma_prepare+0xc54/0x11a0 [ 68.948244] __split_vma+0x5af/0x950 [ 68.948712] ? __pfx___split_vma+0x10/0x10 [ 68.949243] ? find_held_lock+0x2c/0x110 [ 68.949775] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.950340] ? lock_is_held_type+0x9f/0x120 [ 68.950868] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.951486] ? mtree_range_walk+0x632/0x900 [ 68.952043] ? mas_walk+0x5c7/0x7c0 [ 68.952517] do_vmi_munmap+0x1f1/0x2b0 [ 68.952990] mmap_region+0x1f9/0x2660 [ 68.953378] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.953795] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.954362] ? __pfx_lock_acquire+0x10/0x10 [ 68.954787] ? __pfx_mmap_region+0x10/0x10 [ 68.955222] ? security_mmap_addr+0x7d/0xa0 [ 68.955650] ? get_unmapped_area+0x1f5/0x3f0 [ 68.956107] do_mmap+0x854/0xf00 [ 68.956453] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.956857] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.957298] ksys_mmap_pgoff+0x3af/0x500 [ 68.957710] do_syscall_64+0x3f/0x90 [ 68.958092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.958604] RIP: 0033:0x7fd0b4d74d82 [ 68.958975] 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 [ 68.960689] RSP: 002b:00007ffe236c8918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.961421] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0b4d74d82 [ 68.962106] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0b41ae000 [ 68.962782] RBP: 00007fd0b41ae000 R08: 0000000000000009 R09: 0000000000001000 [ 68.963462] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a76dd2fb20 [ 68.964151] R13: 00007ffe236c8930 R14: 00007ffe236c8960 R15: 00007ffe236c8cc0 [ 68.964841] [ 68.965076] [ 68.965245] Allocated by task 220: [ 68.965591] kasan_save_stack+0x22/0x50 [ 68.966019] kasan_set_track+0x25/0x30 [ 68.966424] __kasan_slab_alloc+0x59/0x70 [ 68.966854] kmem_cache_alloc+0x16b/0x370 [ 68.967282] vm_area_dup+0x20/0x160 [ 68.967638] __split_vma+0x170/0x950 [ 68.968021] split_vma+0xc6/0x110 [ 68.968368] mprotect_fixup+0x8d2/0xb30 [ 68.968773] do_mprotect_pkey+0x87e/0xd40 [ 68.969194] __x64_sys_mprotect+0x78/0xc0 [ 68.969603] do_syscall_64+0x3f/0x90 [ 68.969990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.970511] [ 68.970688] Freed by task 13: [ 68.971008] kasan_save_stack+0x22/0x50 [ 68.971429] kasan_set_track+0x25/0x30 [ 68.971835] kasan_save_free_info+0x2b/0x50 [ 68.972257] __kasan_slab_free+0x10a/0x190 [ 68.972689] kmem_cache_free+0x10d/0x4d0 [ 68.973097] rcu_core+0x8c8/0x2860 [ 68.973455] __do_softirq+0x1b7/0x7d4 [ 68.973847] [ 68.974015] Last potentially related work creation: [ 68.974481] kasan_save_stack+0x22/0x50 [ 68.974902] __kasan_record_aux_stack+0x8e/0xa0 [ 68.975373] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.975895] remove_vma+0x139/0x170 [ 68.976254] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.976713] do_vmi_munmap+0x1f1/0x2b0 [ 68.977106] __vm_munmap+0x138/0x3a0 [ 68.977475] __x64_sys_munmap+0x59/0x80 [ 68.977879] do_syscall_64+0x3f/0x90 [ 68.978267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.978803] [ 68.978975] The buggy address belongs to the object at ffff88800fd1f000 [ 68.978975] which belongs to the cache vm_area_struct of size 168 [ 68.980176] The buggy address is located 88 bytes inside of [ 68.980176] freed 168-byte region [ffff88800fd1f000, ffff88800fd1f0a8) [ 68.981313] [ 68.981493] The buggy address belongs to the physical page: [ 68.982031] page:000000005b9091cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd1f [ 68.982917] memcg:ffff88800e035401 [ 68.983276] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.983813] page_type: 0xffffffff() [ 68.984179] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.984927] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e035401 [ 68.985658] page dumped because: kasan: bad access detected [ 68.986193] [ 68.986365] Memory state around the buggy address: [ 68.986841] ffff88800fd1ef00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 68.987554] ffff88800fd1ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 68.988256] >ffff88800fd1f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.988956] ^ [ 68.989540] ffff88800fd1f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 68.990236] ffff88800fd1f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.990932] ================================================================== [ 68.991755] Disabling lock debugging due to kernel taint [ 70.753767] BUG: Bad rss-counter state mm:000000005356de27 type:MM_FILEPAGES val:33 [ 70.754686] BUG: Bad rss-counter state mm:000000005356de27 type:MM_ANONPAGES val:22 [ 71.212003] BUG: Bad rss-counter state mm:000000008fb84533 type:MM_FILEPAGES val:33 [ 71.212980] BUG: Bad rss-counter state mm:000000008fb84533 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39283' (ECDSA) to the list of known hosts. 2023/06/20 23:38:03 fuzzer started 2023/06/20 23:38:03 dialing manager at localhost:36067 2023/06/20 23:38:03 checking machine... 2023/06/20 23:38:03 checking revisions... [ 71.966394] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:38:03 testing simple program... [ 72.004271] cgroup: Unknown subsys name 'net' [ 72.042522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:38:03 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff81131c60 RDX=000000000000131c RSI=000000000000131c RDI=ffffffff864ee660 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000000 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff8113078b 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 00007fcd25ebe900 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=00007fce7e33a650 CR3=000000000f3ae000 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=83698880fca62a827648c90d60eae360 XMM02=000000000011b1d0eff9b2d0a8fce9cb XMM03=000000000011b2a02c67c8bc2e329bc3 XMM04=b99a1f8cec6ec26d00000000000ae988 XMM05=2d02111e08961cd30000000000133940 XMM06=1a58cb52dc18f6d700000000001327d8 XMM07=fb795ef6d65770560000000000122358 XMM08=2c67c8bc2e329bc3000000000011b240 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800c97bc00 RBX=ffff88800d3c59e8 RCX=1ffff1100197eef8 RDX=dffffc0000000000 RSI=ffff88800c97ee50 RDI=ffff88800d3c5a18 RBP=ffff88800dd09668 RSP=ffff88801424fc68 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800c97ec80 R13=0000000000000000 R14=ffff88800e751508 R15=ffff88800e7514c0 RIP=ffffffff81847688 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 00007fce7dd85900 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=00007fce7e33d0b0 CR3=000000001ba1c000 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=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