syzkaller login: [ 31.076419] sshd (213) used greatest stack depth: 24424 bytes left [ 31.077432] BUG: Bad rss-counter state mm:00000000c585b136 type:MM_FILEPAGES val:33 [ 31.078574] BUG: Bad rss-counter state mm:00000000c585b136 type:MM_ANONPAGES val:22 [ 31.248856] ================================================================== [ 31.249966] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.251327] Read of size 8 at addr ffff88800fe82880 by task sshd/220 [ 31.252109] [ 31.252339] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.253213] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.254188] Call Trace: [ 31.254518] [ 31.254802] dump_stack_lvl+0x91/0xf0 [ 31.255328] print_report+0xcc/0x620 [ 31.255812] ? __virt_addr_valid+0x102/0x340 [ 31.256378] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256992] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257629] kasan_report+0xbe/0xf0 [ 31.258103] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258741] vma_interval_tree_remove+0xc75/0xec0 [ 31.259391] vma_prepare+0xc54/0x11a0 [ 31.259870] __split_vma+0x5af/0x950 [ 31.260360] ? __pfx___split_vma+0x10/0x10 [ 31.260893] ? find_held_lock+0x2c/0x110 [ 31.261436] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.262002] ? lock_is_held_type+0x9f/0x120 [ 31.262558] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.263191] ? mtree_range_walk+0x632/0x900 [ 31.263777] ? mas_walk+0x5c7/0x7c0 [ 31.264274] do_vmi_munmap+0x1f1/0x2b0 [ 31.264770] mmap_region+0x1f9/0x2660 [ 31.265273] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.265798] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.266531] ? __pfx_lock_acquire+0x10/0x10 [ 31.267076] ? __pfx_mmap_region+0x10/0x10 [ 31.267657] ? security_mmap_addr+0x7d/0xa0 [ 31.268199] ? get_unmapped_area+0x1f5/0x3f0 [ 31.268776] do_mmap+0x854/0xf00 [ 31.269234] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.269734] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.270315] ksys_mmap_pgoff+0x3af/0x500 [ 31.270829] do_syscall_64+0x3f/0x90 [ 31.271364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272018] RIP: 0033:0x7fa8ae322d82 [ 31.272489] 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 [ 31.274644] RSP: 002b:00007ffd54aa1b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.275600] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8ae322d82 [ 31.276463] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8ad75c000 [ 31.277312] RBP: 00007fa8ad75c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.278159] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621caf03f70 [ 31.279013] R13: 00007ffd54aa1b30 R14: 00007ffd54aa1b60 R15: 00007ffd54aa1ec0 [ 31.279927] [ 31.280231] [ 31.280447] Allocated by task 213: [ 31.280874] kasan_save_stack+0x22/0x50 [ 31.281396] kasan_set_track+0x25/0x30 [ 31.281890] __kasan_slab_alloc+0x59/0x70 [ 31.282439] kmem_cache_alloc+0x16b/0x370 [ 31.282964] vm_area_dup+0x20/0x160 [ 31.283466] __split_vma+0x170/0x950 [ 31.283935] split_vma+0xc6/0x110 [ 31.284393] mprotect_fixup+0x8d2/0xb30 [ 31.284896] do_mprotect_pkey+0x87e/0xd40 [ 31.285434] __x64_sys_mprotect+0x78/0xc0 [ 31.285975] do_syscall_64+0x3f/0x90 [ 31.286472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287131] [ 31.287380] Freed by task 213: [ 31.287770] kasan_save_stack+0x22/0x50 [ 31.288284] kasan_set_track+0x25/0x30 [ 31.288788] kasan_save_free_info+0x2b/0x50 [ 31.289345] __kasan_slab_free+0x10a/0x190 [ 31.289880] kmem_cache_free+0x10d/0x4d0 [ 31.290401] rcu_core+0x8c8/0x2860 [ 31.290847] __do_softirq+0x1b7/0x7d4 [ 31.291394] [ 31.291618] Last potentially related work creation: [ 31.292213] kasan_save_stack+0x22/0x50 [ 31.292728] __kasan_record_aux_stack+0x8e/0xa0 [ 31.293444] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.294078] remove_vma+0x139/0x170 [ 31.294551] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.295117] do_vmi_munmap+0x1f1/0x2b0 [ 31.295635] __vm_munmap+0x138/0x3a0 [ 31.296098] __x64_sys_munmap+0x59/0x80 [ 31.296610] do_syscall_64+0x3f/0x90 [ 31.297080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.297743] [ 31.297957] The buggy address belongs to the object at ffff88800fe82828 [ 31.297957] which belongs to the cache vm_area_struct of size 168 [ 31.299459] The buggy address is located 88 bytes inside of [ 31.299459] freed 168-byte region [ffff88800fe82828, ffff88800fe828d0) [ 31.300881] [ 31.301099] The buggy address belongs to the physical page: [ 31.301766] page:00000000ea1990b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe82 [ 31.302859] memcg:ffff888015ae7201 [ 31.303330] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.303986] page_type: 0xffffffff() [ 31.304453] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.305406] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ae7201 [ 31.306349] page dumped because: kasan: bad access detected [ 31.307016] [ 31.307262] Memory state around the buggy address: [ 31.307856] ffff88800fe82780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.308735] ffff88800fe82800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.309611] >ffff88800fe82880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.310481] ^ [ 31.310898] ffff88800fe82900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.312030] ffff88800fe82980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.313201] ================================================================== [ 31.314527] Disabling lock debugging due to kernel taint [ 34.193009] BUG: Bad rss-counter state mm:0000000060b3492e type:MM_FILEPAGES val:33 [ 34.194253] BUG: Bad rss-counter state mm:0000000060b3492e type:MM_ANONPAGES val:22 [ 34.688501] BUG: Bad rss-counter state mm:00000000d68530c7 type:MM_FILEPAGES val:33 [ 34.689707] BUG: Bad rss-counter state mm:00000000d68530c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5082' (ECDSA) to the list of known hosts. 2023/06/20 22:01:21 fuzzer started 2023/06/20 22:01:21 dialing manager at localhost:36067 2023/06/20 22:01:21 checking machine... 2023/06/20 22:01:21 checking revisions... [ 35.358519] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:01:21 testing simple program... [ 35.417070] cgroup: Unknown subsys name 'net' [ 35.473525] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:01:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801b08d9f8 RCX=0000000000000000 RDX=ffff88801b08d9f8 RSI=00000000000013cd RDI=ffffffff8493bda0 RBP=ffff8880167df428 RSP=ffff88800d8778a8 R8 =ffff8880166930e8 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff888016693110 R14=ffff8880167defa8 R15=ffff88800d8779d8 RIP=ffffffff81acd254 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 00007f0d9be18700 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=00007ffcf67ccde8 CR3=000000000e1b8000 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=2030323a31303a3232203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a31303a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800d5aa3c0 RCX=ffffffff812e0135 RDX=1ffff11002b7f0ec RSI=0000000000000000 RDI=ffff888015bf8760 RBP=ffff888015bf8720 RSP=ffff88800d80f918 R8 =0000000000000001 R9 =ffffed1001b01f11 R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000287 R13=ffffea0000356a80 R14=ffffffff8366b8df R15=ffff88800d3a0900 RIP=ffffffff845195a1 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 00007f89de1a9900 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=00007f89dd63d0d0 CR3=000000000c90a000 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=3d956590767f35a81644e1a32cfe588f XMM02=000000000011a9c0d59e07bde36eea69 XMM03=000000000011aae8ec2efd57dc4c00df XMM04=10b46e8e1ade346600000000000ae988 XMM05=8c22762f3cfcd4e100000000001330d0 XMM06=4fda316b135da52b0000000000131ec0 XMM07=fb795ef6d65770560000000000122060 XMM08=2c67c8bc2e329bc3000000000011aae8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000