syzkaller login: [ 68.738597] BUG: Bad rss-counter state mm:000000002717b656 type:MM_FILEPAGES val:33 [ 68.740589] BUG: Bad rss-counter state mm:000000002717b656 type:MM_ANONPAGES val:22 [ 68.908817] ================================================================== [ 68.909713] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.910689] Read of size 8 at addr ffff88801015d310 by task sshd/229 [ 68.911442] [ 68.911653] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.912483] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.913448] Call Trace: [ 68.913753] [ 68.914026] dump_stack_lvl+0x91/0xf0 [ 68.914512] print_report+0xcc/0x620 [ 68.914972] ? __virt_addr_valid+0x102/0x340 [ 68.915526] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.916107] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.916715] kasan_report+0xbe/0xf0 [ 68.917185] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.917785] vma_interval_tree_remove+0xc75/0xec0 [ 68.918383] vma_prepare+0xc54/0x11a0 [ 68.918853] __split_vma+0x5af/0x950 [ 68.919355] ? __pfx___split_vma+0x10/0x10 [ 68.919879] ? find_held_lock+0x2c/0x110 [ 68.920401] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.920970] ? lock_is_held_type+0x9f/0x120 [ 68.921498] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.922135] ? mtree_range_walk+0x632/0x900 [ 68.922679] ? mas_walk+0x5c7/0x7c0 [ 68.923141] do_vmi_munmap+0x1f1/0x2b0 [ 68.923637] mmap_region+0x1f9/0x2660 [ 68.924097] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.924613] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.925315] ? __pfx_lock_acquire+0x10/0x10 [ 68.925826] ? __pfx_mmap_region+0x10/0x10 [ 68.926355] ? security_mmap_addr+0x7d/0xa0 [ 68.926863] ? get_unmapped_area+0x1f5/0x3f0 [ 68.927418] do_mmap+0x854/0xf00 [ 68.927839] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.928331] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.928882] ksys_mmap_pgoff+0x3af/0x500 [ 68.929380] do_syscall_64+0x3f/0x90 [ 68.929853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.930509] RIP: 0033:0x7f7a8680fd82 [ 68.930963] 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 [ 68.933120] RSP: 002b:00007ffce227d118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.934026] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a8680fd82 [ 68.934872] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a85c49000 [ 68.935753] RBP: 00007f7a85c49000 R08: 0000000000000009 R09: 0000000000001000 [ 68.936619] R10: 0000000000000812 R11: 0000000000000206 R12: 000055af21d19d90 [ 68.937471] R13: 00007ffce227d130 R14: 00007ffce227d160 R15: 00007ffce227d4c0 [ 68.938341] [ 68.938634] [ 68.938844] Allocated by task 222: [ 68.939305] kasan_save_stack+0x22/0x50 [ 68.939811] kasan_set_track+0x25/0x30 [ 68.940318] __kasan_slab_alloc+0x59/0x70 [ 68.940846] kmem_cache_alloc+0x16b/0x370 [ 68.941367] vm_area_dup+0x20/0x160 [ 68.941819] __split_vma+0x170/0x950 [ 68.942287] split_vma+0xc6/0x110 [ 68.942728] mprotect_fixup+0x8d2/0xb30 [ 68.943257] do_mprotect_pkey+0x87e/0xd40 [ 68.943789] __x64_sys_mprotect+0x78/0xc0 [ 68.944323] do_syscall_64+0x3f/0x90 [ 68.944827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.945498] [ 68.945716] Freed by task 222: [ 68.946110] kasan_save_stack+0x22/0x50 [ 68.946639] kasan_set_track+0x25/0x30 [ 68.947146] kasan_save_free_info+0x2b/0x50 [ 68.947725] __kasan_slab_free+0x10a/0x190 [ 68.948274] kmem_cache_free+0x10d/0x4d0 [ 68.948802] rcu_core+0x8c8/0x2860 [ 68.949267] __do_softirq+0x1b7/0x7d4 [ 68.949747] [ 68.949966] Last potentially related work creation: [ 68.950573] kasan_save_stack+0x22/0x50 [ 68.951091] __kasan_record_aux_stack+0x8e/0xa0 [ 68.951702] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.952362] remove_vma+0x139/0x170 [ 68.952853] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.953457] do_vmi_munmap+0x1f1/0x2b0 [ 68.953967] __vm_munmap+0x138/0x3a0 [ 68.954451] __x64_sys_munmap+0x59/0x80 [ 68.954952] do_syscall_64+0x3f/0x90 [ 68.955464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.956118] [ 68.956357] The buggy address belongs to the object at ffff88801015d2b8 [ 68.956357] which belongs to the cache vm_area_struct of size 168 [ 68.957886] The buggy address is located 88 bytes inside of [ 68.957886] freed 168-byte region [ffff88801015d2b8, ffff88801015d360) [ 68.959362] [ 68.959583] The buggy address belongs to the physical page: [ 68.960275] page:00000000d26faa05 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1015d [ 68.961423] memcg:ffff888015871c01 [ 68.961866] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.962538] page_type: 0xffffffff() [ 68.962997] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.963952] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015871c01 [ 68.964911] page dumped because: kasan: bad access detected [ 68.965587] [ 68.965806] Memory state around the buggy address: [ 68.966403] ffff88801015d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 68.967311] ffff88801015d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 68.968184] >ffff88801015d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 68.969052] ^ [ 68.969539] ffff88801015d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 68.970425] ffff88801015d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 68.971305] ================================================================== [ 68.972325] Disabling lock debugging due to kernel taint [ 71.408491] BUG: Bad rss-counter state mm:00000000972753a1 type:MM_FILEPAGES val:33 [ 71.409495] BUG: Bad rss-counter state mm:00000000972753a1 type:MM_ANONPAGES val:22 [ 71.773268] BUG: Bad rss-counter state mm:00000000d218260a type:MM_FILEPAGES val:33 [ 71.774087] BUG: Bad rss-counter state mm:00000000d218260a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55692' (ECDSA) to the list of known hosts. 2023/06/21 03:26:47 fuzzer started 2023/06/21 03:26:47 dialing manager at localhost:36067 2023/06/21 03:26:47 checking machine... 2023/06/21 03:26:47 checking revisions... [ 72.409542] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:26:47 testing simple program... [ 72.447123] cgroup: Unknown subsys name 'net' [ 72.502022] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:26:47 Registers: info registers vcpu 0 RAX=1ffffffff0bc0479 RBX=ffffffff85e023c8 RCX=ffffffff81846193 RDX=0000000000000000 RSI=ffffffff8613f3f6 RDI=ffffffff85e023b8 RBP=ffffffff85e023b8 RSP=ffff888016ed7020 R8 =ffffffff8613f3f6 R9 =ffff888016ed7118 R10=0000000000038001 R11=0000000000021e7d R12=ffffffff85e023dc R13=ffffffff85e023b8 R14=ffffffff85e023b8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007fedc71bd900 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=00007fedc7176008 CR3=000000001b6e8000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f40ed9295e0 CR3=000000000f074000 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=2037343a36323a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3933 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3933325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a36323a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000