syzkaller login: [ 68.593358] BUG: Bad rss-counter state mm:00000000d8430de0 type:MM_FILEPAGES val:33 [ 68.594358] BUG: Bad rss-counter state mm:00000000d8430de0 type:MM_ANONPAGES val:22 [ 68.757085] ================================================================== [ 68.758025] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.758978] Read of size 8 at addr ffff88800dc17140 by task sshd/219 [ 68.759754] [ 68.759977] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 68.761151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.762167] Call Trace: [ 68.762487] [ 68.762805] dump_stack_lvl+0x91/0xf0 [ 68.763305] print_report+0xcc/0x620 [ 68.763809] ? __virt_addr_valid+0x102/0x340 [ 68.764365] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.764995] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.765651] kasan_report+0xbe/0xf0 [ 68.766132] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.766762] vma_interval_tree_remove+0xc75/0xec0 [ 68.767371] vma_prepare+0xc54/0x11a0 [ 68.767861] __split_vma+0x5af/0x950 [ 68.768334] ? __pfx___split_vma+0x10/0x10 [ 68.768877] ? find_held_lock+0x2c/0x110 [ 68.769401] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.769998] ? lock_is_held_type+0x9f/0x120 [ 68.770560] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.771182] ? mtree_range_walk+0x632/0x900 [ 68.771768] ? mas_walk+0x5c7/0x7c0 [ 68.772245] do_vmi_munmap+0x1f1/0x2b0 [ 68.772751] mmap_region+0x1f9/0x2660 [ 68.773239] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.773779] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.774493] ? __pfx_lock_acquire+0x10/0x10 [ 68.775041] ? __pfx_mmap_region+0x10/0x10 [ 68.775590] ? security_mmap_addr+0x7d/0xa0 [ 68.776129] ? get_unmapped_area+0x1f5/0x3f0 [ 68.776687] do_mmap+0x854/0xf00 [ 68.777125] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.777636] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.778201] ksys_mmap_pgoff+0x3af/0x500 [ 68.778723] do_syscall_64+0x3f/0x90 [ 68.779202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.779858] RIP: 0033:0x7fea2fb05d82 [ 68.780322] 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 [ 68.782515] RSP: 002b:00007ffddf69a888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.783433] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea2fb05d82 [ 68.784294] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea2ef3f000 [ 68.785152] RBP: 00007fea2ef3f000 R08: 0000000000000009 R09: 0000000000001000 [ 68.786037] R10: 0000000000000812 R11: 0000000000000206 R12: 00005556f1a46f70 [ 68.786909] R13: 00007ffddf69a8a0 R14: 00007ffddf69a8d0 R15: 00007ffddf69ac30 [ 68.787782] [ 68.788080] [ 68.788299] Allocated by task 212: [ 68.788737] kasan_save_stack+0x22/0x50 [ 68.789246] kasan_set_track+0x25/0x30 [ 68.789783] __kasan_slab_alloc+0x59/0x70 [ 68.790312] kmem_cache_alloc+0x16b/0x370 [ 68.790849] vm_area_dup+0x20/0x160 [ 68.791304] __split_vma+0x170/0x950 [ 68.791780] split_vma+0xc6/0x110 [ 68.792239] mprotect_fixup+0x8d2/0xb30 [ 68.792771] do_mprotect_pkey+0x87e/0xd40 [ 68.793319] __x64_sys_mprotect+0x78/0xc0 [ 68.793921] do_syscall_64+0x3f/0x90 [ 68.794419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.795103] [ 68.795332] Freed by task 19: [ 68.795749] kasan_save_stack+0x22/0x50 [ 68.796276] kasan_set_track+0x25/0x30 [ 68.796793] kasan_save_free_info+0x2b/0x50 [ 68.797349] __kasan_slab_free+0x10a/0x190 [ 68.797947] kmem_cache_free+0x10d/0x4d0 [ 68.798475] rcu_core+0x8c8/0x2860 [ 68.798947] __do_softirq+0x1b7/0x7d4 [ 68.799449] [ 68.799688] Last potentially related work creation: [ 68.800311] kasan_save_stack+0x22/0x50 [ 68.800845] __kasan_record_aux_stack+0x8e/0xa0 [ 68.801445] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.802261] remove_vma+0x139/0x170 [ 68.802759] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.803342] do_vmi_munmap+0x1f1/0x2b0 [ 68.803862] __vm_munmap+0x138/0x3a0 [ 68.804355] __x64_sys_munmap+0x59/0x80 [ 68.804887] do_syscall_64+0x3f/0x90 [ 68.805386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.806088] [ 68.806313] The buggy address belongs to the object at ffff88800dc170e8 [ 68.806313] which belongs to the cache vm_area_struct of size 168 [ 68.807900] The buggy address is located 88 bytes inside of [ 68.807900] freed 168-byte region [ffff88800dc170e8, ffff88800dc17190) [ 68.809368] [ 68.809620] The buggy address belongs to the physical page: [ 68.810308] page:000000008396e84d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc17 [ 68.811482] memcg:ffff88800f820a01 [ 68.811942] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.812627] page_type: 0xffffffff() [ 68.813102] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 68.814122] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f820a01 [ 68.815086] page dumped because: kasan: bad access detected [ 68.815808] [ 68.816033] Memory state around the buggy address: [ 68.816659] ffff88800dc17000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.817577] ffff88800dc17080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 68.818476] >ffff88800dc17100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.819380] ^ [ 68.820082] ffff88800dc17180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 68.820992] ffff88800dc17200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 68.821908] ================================================================== [ 68.822892] Disabling lock debugging due to kernel taint [ 71.097290] BUG: Bad rss-counter state mm:0000000017930de3 type:MM_FILEPAGES val:33 [ 71.098432] BUG: Bad rss-counter state mm:0000000017930de3 type:MM_ANONPAGES val:22 [ 71.444913] BUG: Bad rss-counter state mm:000000001d1c2970 type:MM_FILEPAGES val:33 [ 71.445744] BUG: Bad rss-counter state mm:000000001d1c2970 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18040' (ECDSA) to the list of known hosts. 2023/06/20 09:25:35 fuzzer started 2023/06/20 09:25:35 dialing manager at localhost:44161 2023/06/20 09:25:35 checking machine... 2023/06/20 09:25:35 checking revisions... [ 72.040031] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:25:35 testing simple program... [ 72.085683] cgroup: Unknown subsys name 'net' [ 72.116736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:24:57 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007f8ebcf3dd00 RCX=ffffffff813a0ac9 RDX=ffff888015a8d1c0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88800947f860 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888015a8d1c0 R15=ffff888018f4b030 RIP=ffffffff814c07eb 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 00007f8ebca56900 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=00007ffc6497b000 CR3=000000000d8da000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007fa70acc7fd0 CR3=000000000f802000 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=6efece1470bc10b46a45073cf5997b33 XMM02=0000000000125948ec2efd57dc4c00df XMM03=000000000012d2984faabf1cbd802365 XMM04=34a71b4c758043a600000000000ae988 XMM05=dfcdbad4f1609c37000000000013ccd0 XMM06=bf555490d3a526e7000000000013bb38 XMM07=e042d86d42eb936e000000000012d518 XMM08=4faabf1cbd80236500000000001259a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000