syzkaller login: [ 190.930014] BUG: Bad rss-counter state mm:00000000b0e8d896 type:MM_FILEPAGES val:33 [ 190.931291] BUG: Bad rss-counter state mm:00000000b0e8d896 type:MM_ANONPAGES val:22 [ 190.970627] ================================================================== [ 190.971588] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 190.972514] Read of size 8 at addr ffff88801596cdf0 by task sshd/228 [ 190.973314] [ 190.973555] CPU: 0 PID: 228 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 190.974611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 190.975601] Call Trace: [ 190.975938] [ 190.976231] dump_stack_lvl+0x91/0xf0 [ 190.976727] print_report+0xcc/0x620 [ 190.977212] ? __virt_addr_valid+0x102/0x340 [ 190.977765] ? vma_interval_tree_remove+0xc75/0xec0 [ 190.978422] ? vma_interval_tree_remove+0xc75/0xec0 [ 190.979060] kasan_report+0xbe/0xf0 [ 190.979541] ? vma_interval_tree_remove+0xc75/0xec0 [ 190.980181] vma_interval_tree_remove+0xc75/0xec0 [ 190.980829] vma_prepare+0xc54/0x11a0 [ 190.981312] __split_vma+0x5af/0x950 [ 190.981787] ? __pfx___split_vma+0x10/0x10 [ 190.982330] ? find_held_lock+0x2c/0x110 [ 190.982859] do_vmi_align_munmap+0x2ba/0x11f0 [ 190.983430] ? lock_is_held_type+0x9f/0x120 [ 190.983988] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 190.984597] ? mtree_range_walk+0x632/0x900 [ 190.985181] ? mas_walk+0x5c7/0x7c0 [ 190.985665] do_vmi_munmap+0x1f1/0x2b0 [ 190.986161] mmap_region+0x1f9/0x2660 [ 190.986666] ? vm_mmap_pgoff+0x15c/0x3a0 [ 190.987201] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 190.987918] ? __pfx_lock_acquire+0x10/0x10 [ 190.988473] ? __pfx_mmap_region+0x10/0x10 [ 190.989004] ? security_mmap_addr+0x7d/0xa0 [ 190.989537] ? get_unmapped_area+0x1f5/0x3f0 [ 190.990093] do_mmap+0x854/0xf00 [ 190.990565] vm_mmap_pgoff+0x1a6/0x3a0 [ 190.991062] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 190.991632] ksys_mmap_pgoff+0x3af/0x500 [ 190.992140] do_syscall_64+0x3f/0x90 [ 190.992619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 190.993268] RIP: 0033:0x7f7f512abd82 [ 190.993729] 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 [ 190.995899] RSP: 002b:00007ffdb3c73828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 190.996818] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f512abd82 [ 190.997753] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f506e5000 [ 190.998655] RBP: 00007f7f506e5000 R08: 0000000000000009 R09: 0000000000001000 [ 190.999503] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b91b74ec0 [ 191.000380] R13: 00007ffdb3c73840 R14: 00007ffdb3c73870 R15: 00007ffdb3c73bd0 [ 191.001270] [ 191.001570] [ 191.001785] Allocated by task 221: [ 191.002234] kasan_save_stack+0x22/0x50 [ 191.002763] kasan_set_track+0x25/0x30 [ 191.003264] __kasan_slab_alloc+0x59/0x70 [ 191.003794] kmem_cache_alloc+0x16b/0x370 [ 191.004333] vm_area_dup+0x20/0x160 [ 191.004788] __split_vma+0x170/0x950 [ 191.005273] split_vma+0xc6/0x110 [ 191.005727] mprotect_fixup+0x8d2/0xb30 [ 191.006264] do_mprotect_pkey+0x87e/0xd40 [ 191.006820] __x64_sys_mprotect+0x78/0xc0 [ 191.007381] do_syscall_64+0x3f/0x90 [ 191.007877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 191.008539] [ 191.008760] Freed by task 221: [ 191.009172] kasan_save_stack+0x22/0x50 [ 191.009704] kasan_set_track+0x25/0x30 [ 191.010215] kasan_save_free_info+0x2b/0x50 [ 191.010783] __kasan_slab_free+0x10a/0x190 [ 191.011343] kmem_cache_free+0x10d/0x4d0 [ 191.011873] rcu_core+0x8c8/0x2860 [ 191.012340] __do_softirq+0x1b7/0x7d4 [ 191.012835] [ 191.013056] Last potentially related work creation: [ 191.013675] kasan_save_stack+0x22/0x50 [ 191.014199] __kasan_record_aux_stack+0x8e/0xa0 [ 191.014804] __call_rcu_common.constprop.0+0x6a/0xb90 [ 191.015495] remove_vma+0x139/0x170 [ 191.015970] do_vmi_align_munmap+0xd4a/0x11f0 [ 191.016559] do_vmi_munmap+0x1f1/0x2b0 [ 191.017065] __vm_munmap+0x138/0x3a0 [ 191.017559] __x64_sys_munmap+0x59/0x80 [ 191.018079] do_syscall_64+0x3f/0x90 [ 191.018585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 191.019288] [ 191.019548] The buggy address belongs to the object at ffff88801596cd98 [ 191.019548] which belongs to the cache vm_area_struct of size 168 [ 191.021100] The buggy address is located 88 bytes inside of [ 191.021100] freed 168-byte region [ffff88801596cd98, ffff88801596ce40) [ 191.022605] [ 191.022844] The buggy address belongs to the physical page: [ 191.023533] page:0000000024388c26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1596c [ 191.024707] memcg:ffff888015ae5e01 [ 191.025153] flags: 0x100000000000200(slab|node=0|zone=1) [ 191.025835] page_type: 0xffffffff() [ 191.026318] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 191.027290] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ae5e01 [ 191.028248] page dumped because: kasan: bad access detected [ 191.028957] [ 191.029179] Memory state around the buggy address: [ 191.029821] ffff88801596cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 191.030761] ffff88801596cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 191.031658] >ffff88801596cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 191.032562] ^ [ 191.033430] ffff88801596ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 191.034328] ffff88801596ce80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 191.035230] ================================================================== [ 191.036309] Disabling lock debugging due to kernel taint [ 192.777622] BUG: Bad rss-counter state mm:000000007ea33ad3 type:MM_FILEPAGES val:33 [ 192.778887] BUG: Bad rss-counter state mm:000000007ea33ad3 type:MM_ANONPAGES val:22 [ 193.215632] BUG: Bad rss-counter state mm:000000003df5084e type:MM_FILEPAGES val:33 [ 193.216899] BUG: Bad rss-counter state mm:000000003df5084e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14778' (ECDSA) to the list of known hosts. 2023/06/20 07:55:36 fuzzer started 2023/06/20 07:55:36 dialing manager at localhost:44161 2023/06/20 07:55:36 checking machine... 2023/06/20 07:55:36 checking revisions... [ 193.901431] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:55:36 testing simple program... [ 193.954687] cgroup: Unknown subsys name 'net' [ 194.023406] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:52:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100377bf5f RSI=ffffffff818e8f1a RDI=ffff88801bbdfb68 RBP=ffff88801bbdfb38 RSP=ffff88801bbdfa98 R8 =0000000000000001 R9 =ffff88801bbdfae0 R10=0000000000038001 R11=0000000000022144 R12=ffff88801bbdfb68 R13=0000000000000000 R14=ffff8880159c9b40 R15=dffffc0000000000 RIP=ffffffff813ad42e RFL=00000282 [--S----] 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 00007f39fd891900 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=00007f39fde48618 CR3=000000001bb0e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8609f9ba RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008e579d0 RSP=ffff888008e57908 R8 =ffffffff8609f9be R9 =ffff888008e579b8 R10=0000000000038001 R11=00000000000078fb R12=ffff888008e579d8 R13=ffff888008e579c0 R14=0000000000000005 R15=ffff888008e57978 RIP=ffffffff81130b1f RFL=00000297 [--S-APC] 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=00007f39fde46650 CR3=0000000015a56000 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=2036333a35353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a35353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000