syzkaller login: [ 40.935209] BUG: Bad rss-counter state mm:000000006277f156 type:MM_FILEPAGES val:33 [ 40.936474] BUG: Bad rss-counter state mm:000000006277f156 type:MM_ANONPAGES val:22 [ 41.093467] ================================================================== [ 41.094436] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.095473] Read of size 8 at addr ffff88800fdaa880 by task sshd/220 [ 41.096302] [ 41.096538] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.097590] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.098667] Call Trace: [ 41.099006] [ 41.099318] dump_stack_lvl+0x91/0xf0 [ 41.099841] print_report+0xcc/0x620 [ 41.100362] ? __virt_addr_valid+0x102/0x340 [ 41.100958] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.101623] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.102284] kasan_report+0xbe/0xf0 [ 41.102808] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.103488] vma_interval_tree_remove+0xc75/0xec0 [ 41.104138] vma_prepare+0xc54/0x11a0 [ 41.104646] __split_vma+0x5af/0x950 [ 41.105150] ? __pfx___split_vma+0x10/0x10 [ 41.105715] ? find_held_lock+0x2c/0x110 [ 41.106280] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.106907] ? lock_is_held_type+0x9f/0x120 [ 41.107480] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.108140] ? mtree_range_walk+0x632/0x900 [ 41.108731] ? mas_walk+0x5c7/0x7c0 [ 41.109238] do_vmi_munmap+0x1f1/0x2b0 [ 41.109770] mmap_region+0x1f9/0x2660 [ 41.110283] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.110856] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.111619] ? __pfx_lock_acquire+0x10/0x10 [ 41.112188] ? __pfx_mmap_region+0x10/0x10 [ 41.112750] ? security_mmap_addr+0x7d/0xa0 [ 41.113322] ? get_unmapped_area+0x1f5/0x3f0 [ 41.113905] do_mmap+0x854/0xf00 [ 41.114370] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.114913] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.115513] ksys_mmap_pgoff+0x3af/0x500 [ 41.116062] do_syscall_64+0x3f/0x90 [ 41.116571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.117262] RIP: 0033:0x7f95c812ed82 [ 41.117754] 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 [ 41.120061] RSP: 002b:00007fff915590d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.121032] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95c812ed82 [ 41.121941] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95c7568000 [ 41.122868] RBP: 00007f95c7568000 R08: 0000000000000009 R09: 0000000000001000 [ 41.123780] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8991c9f70 [ 41.124688] R13: 00007fff915590f0 R14: 00007fff91559120 R15: 00007fff91559480 [ 41.125604] [ 41.125914] [ 41.126140] Allocated by task 213: [ 41.126603] kasan_save_stack+0x22/0x50 [ 41.127147] kasan_set_track+0x25/0x30 [ 41.127670] __kasan_slab_alloc+0x59/0x70 [ 41.128235] kmem_cache_alloc+0x16b/0x370 [ 41.128783] vm_area_dup+0x20/0x160 [ 41.129272] __split_vma+0x170/0x950 [ 41.129770] split_vma+0xc6/0x110 [ 41.130233] mprotect_fixup+0x8d2/0xb30 [ 41.130797] do_mprotect_pkey+0x87e/0xd40 [ 41.131349] __x64_sys_mprotect+0x78/0xc0 [ 41.131912] do_syscall_64+0x3f/0x90 [ 41.132418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.133106] [ 41.133334] Freed by task 213: [ 41.133751] kasan_save_stack+0x22/0x50 [ 41.134295] kasan_set_track+0x25/0x30 [ 41.134838] kasan_save_free_info+0x2b/0x50 [ 41.135407] __kasan_slab_free+0x10a/0x190 [ 41.135987] kmem_cache_free+0x10d/0x4d0 [ 41.136529] rcu_core+0x8c8/0x2860 [ 41.137004] __do_softirq+0x1b7/0x7d4 [ 41.137517] [ 41.137745] Last potentially related work creation: [ 41.138376] kasan_save_stack+0x22/0x50 [ 41.139079] __kasan_record_aux_stack+0x8e/0xa0 [ 41.139811] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.140625] remove_vma+0x139/0x170 [ 41.141202] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.141915] do_vmi_munmap+0x1f1/0x2b0 [ 41.142566] __vm_munmap+0x138/0x3a0 [ 41.143171] __x64_sys_munmap+0x59/0x80 [ 41.143799] do_syscall_64+0x3f/0x90 [ 41.144368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.145145] [ 41.145400] Second to last potentially related work creation: [ 41.146207] kasan_save_stack+0x22/0x50 [ 41.146838] __kasan_record_aux_stack+0x8e/0xa0 [ 41.147515] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.148282] remove_vma+0x139/0x170 [ 41.148812] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.149475] do_vmi_munmap+0x1f1/0x2b0 [ 41.150045] mmap_region+0x1f9/0x2660 [ 41.150638] do_mmap+0x854/0xf00 [ 41.151149] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.151727] ksys_mmap_pgoff+0x3af/0x500 [ 41.152317] do_syscall_64+0x3f/0x90 [ 41.152885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.153647] [ 41.153901] The buggy address belongs to the object at ffff88800fdaa828 [ 41.153901] which belongs to the cache vm_area_struct of size 168 [ 41.155560] The buggy address is located 88 bytes inside of [ 41.155560] freed 168-byte region [ffff88800fdaa828, ffff88800fdaa8d0) [ 41.156982] [ 41.157197] The buggy address belongs to the physical page: [ 41.157858] page:00000000a346e4e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdaa [ 41.158968] memcg:ffff88800dfc5a01 [ 41.159399] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.160103] page_type: 0xffffffff() [ 41.160562] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 41.161482] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfc5a01 [ 41.162408] page dumped because: kasan: bad access detected [ 41.163105] [ 41.163320] Memory state around the buggy address: [ 41.163896] ffff88800fdaa780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 41.164755] ffff88800fdaa800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.165611] >ffff88800fdaa880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.166475] ^ [ 41.166916] ffff88800fdaa900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.167769] ffff88800fdaa980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 41.168631] ================================================================== [ 41.169740] Disabling lock debugging due to kernel taint [ 43.222192] BUG: Bad rss-counter state mm:00000000a65d1b7f type:MM_FILEPAGES val:33 [ 43.223369] BUG: Bad rss-counter state mm:00000000a65d1b7f type:MM_ANONPAGES val:22 [ 43.756871] BUG: Bad rss-counter state mm:00000000951b89a3 type:MM_FILEPAGES val:33 [ 43.758012] BUG: Bad rss-counter state mm:00000000951b89a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45334' (ECDSA) to the list of known hosts. 2023/06/19 16:36:01 fuzzer started 2023/06/19 16:36:01 dialing manager at localhost:44161 2023/06/19 16:36:01 checking machine... 2023/06/19 16:36:01 checking revisions... [ 44.410728] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:36:01 testing simple program... [ 44.458371] cgroup: Unknown subsys name 'net' [ 44.501466] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:35:59 Registers: info registers vcpu 0 RAX=ffff88800fea7960 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800fea7801 RSI=ffff88800fea7898 RDI=ffff88800fea7898 RBP=ffff88800fea7920 RSP=ffff88800fea7808 R8 =0000000000000001 R9 =ffff88800fea7908 R10=0000000000038001 R11=0000000000006097 R12=ffff88800fea7928 R13=ffff88800fea7910 R14=ffff88800fea7898 R15=ffff88800fea78c8 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007fc5b2816900 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=00007fc5b2dcd618 CR3=000000000e6da000 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=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=00007f00dd681000 CR3=000000000d6fc000 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=5b83bce15e2c63995d43517ba5cfb093 XMM02=2c67c8bc2e329bc3000000000011d068 XMM03=fb795ef6d65770560000000000123a28 XMM04=c02bec0b7378b2da00000000000ae988 XMM05=6b0da9a47a731bd20000000000135758 XMM06=c291bd5c70af25b90000000000134488 XMM07=e042d86d42eb936e0000000000123ca8 XMM08=9a36b7540033d32a000000000011d0c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000