syzkaller login: [ 30.685832] BUG: Bad rss-counter state mm:00000000302f4af6 type:MM_FILEPAGES val:33 [ 30.687210] BUG: Bad rss-counter state mm:00000000302f4af6 type:MM_ANONPAGES val:22 [ 30.832664] ================================================================== [ 30.833770] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.834785] Read of size 8 at addr ffff888017e41df0 by task sshd/220 [ 30.835747] [ 30.835964] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.836836] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.837867] Call Trace: [ 30.838195] <TASK> [ 30.838477] dump_stack_lvl+0x91/0xf0 [ 30.838971] print_report+0xcc/0x620 [ 30.839461] ? __virt_addr_valid+0x102/0x340 [ 30.840026] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.840662] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.841283] kasan_report+0xbe/0xf0 [ 30.841792] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.842421] vma_interval_tree_remove+0xc75/0xec0 [ 30.843022] vma_prepare+0xc54/0x11a0 [ 30.843500] __split_vma+0x5af/0x950 [ 30.843976] ? __pfx___split_vma+0x10/0x10 [ 30.844508] ? find_held_lock+0x2c/0x110 [ 30.845032] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.845611] ? lock_is_held_type+0x9f/0x120 [ 30.846157] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.846769] ? mtree_range_walk+0x632/0x900 [ 30.847321] ? mas_walk+0x5c7/0x7c0 [ 30.847796] do_vmi_munmap+0x1f1/0x2b0 [ 30.848288] mmap_region+0x1f9/0x2660 [ 30.848775] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.849283] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.850014] ? __pfx_lock_acquire+0x10/0x10 [ 30.850543] ? __pfx_mmap_region+0x10/0x10 [ 30.851071] ? security_mmap_addr+0x7d/0xa0 [ 30.851602] ? get_unmapped_area+0x1f5/0x3f0 [ 30.852163] do_mmap+0x854/0xf00 [ 30.852602] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.853102] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.853680] ksys_mmap_pgoff+0x3af/0x500 [ 30.854194] do_syscall_64+0x3f/0x90 [ 30.854679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.855337] RIP: 0033:0x7f6a1b518d82 [ 30.855802] 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 [ 30.857954] RSP: 002b:00007ffcb3641c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.858863] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a1b518d82 [ 30.859706] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a1a952000 [ 30.860552] RBP: 00007f6a1a952000 R08: 0000000000000009 R09: 0000000000001000 [ 30.861420] R10: 0000000000000812 R11: 0000000000000206 R12: 000055901ee62f70 [ 30.862265] R13: 00007ffcb3641c60 R14: 00007ffcb3641c90 R15: 00007ffcb3641ff0 [ 30.863112] </TASK> [ 30.863403] [ 30.863623] Allocated by task 213: [ 30.864052] kasan_save_stack+0x22/0x50 [ 30.864553] kasan_set_track+0x25/0x30 [ 30.865049] __kasan_slab_alloc+0x59/0x70 [ 30.865583] kmem_cache_alloc+0x16b/0x370 [ 30.866105] vm_area_dup+0x20/0x160 [ 30.866559] __split_vma+0x170/0x950 [ 30.867034] split_vma+0xc6/0x110 [ 30.867479] mprotect_fixup+0x8d2/0xb30 [ 30.867981] do_mprotect_pkey+0x87e/0xd40 [ 30.868497] __x64_sys_mprotect+0x78/0xc0 [ 30.869014] do_syscall_64+0x3f/0x90 [ 30.869500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.870146] [ 30.870362] Freed by task 213: [ 30.870756] kasan_save_stack+0x22/0x50 [ 30.871258] kasan_set_track+0x25/0x30 [ 30.871760] kasan_save_free_info+0x2b/0x50 [ 30.872295] __kasan_slab_free+0x10a/0x190 [ 30.872832] kmem_cache_free+0x10d/0x4d0 [ 30.873364] rcu_core+0x8c8/0x2860 [ 30.873809] __do_softirq+0x1b7/0x7d4 [ 30.874285] [ 30.874500] Last potentially related work creation: [ 30.875085] kasan_save_stack+0x22/0x50 [ 30.875586] __kasan_record_aux_stack+0x8e/0xa0 [ 30.876227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.876873] remove_vma+0x139/0x170 [ 30.877340] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.877898] do_vmi_munmap+0x1f1/0x2b0 [ 30.878381] __vm_munmap+0x138/0x3a0 [ 30.878847] __x64_sys_munmap+0x59/0x80 [ 30.879340] do_syscall_64+0x3f/0x90 [ 30.879814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.880462] [ 30.880678] The buggy address belongs to the object at ffff888017e41d98 [ 30.880678] which belongs to the cache vm_area_struct of size 168 [ 30.882158] The buggy address is located 88 bytes inside of [ 30.882158] freed 168-byte region [ffff888017e41d98, ffff888017e41e40) [ 30.883560] [ 30.883776] The buggy address belongs to the physical page: [ 30.884436] page:00000000f49b814d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e41 [ 30.885541] memcg:ffff888015d28a01 [ 30.885969] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.886573] page_type: 0xffffffff() [ 30.887004] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.887873] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d28a01 [ 30.888723] page dumped because: kasan: bad access detected [ 30.889359] [ 30.889563] Memory state around the buggy address: [ 30.890113] ffff888017e41c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.890924] ffff888017e41d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.891728] >ffff888017e41d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.892525] ^ [ 30.893283] ffff888017e41e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.894100] ffff888017e41e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.894935] ================================================================== [ 30.895859] Disabling lock debugging due to kernel taint [ 32.882599] BUG: Bad rss-counter state mm:00000000210b40a0 type:MM_FILEPAGES val:33 [ 32.883790] BUG: Bad rss-counter state mm:00000000210b40a0 type:MM_ANONPAGES val:22 [ 33.348744] BUG: Bad rss-counter state mm:00000000480cf9b4 type:MM_FILEPAGES val:33 [ 33.349988] BUG: Bad rss-counter state mm:00000000480cf9b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42745' (ECDSA) to the list of known hosts. 2023/06/21 04:47:26 fuzzer started 2023/06/21 04:47:26 dialing manager at localhost:36067 2023/06/21 04:47:26 checking machine... 2023/06/21 04:47:26 checking revisions... [ 34.048885] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:47:26 testing simple program... [ 34.100473] cgroup: Unknown subsys name 'net' [ 34.165998] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:47:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f96ff18ddd0 CR3=0000000016ae8000 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=2036323a37343a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a37343a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019ea78d8 RCX=0000000000000001 RDX=1ffff110033d4f1c RSI=ffff888019ea7f48 RDI=ffff888019ea78e0 RBP=ffff888019ea7f48 RSP=ffff888019ea7830 R8 =0000000000000001 R9 =ffff888019ea7918 R10=0000000000038001 R11=00000000000b5080 R12=0000000000000008 R13=ffff888019ea7920 R14=ffff888019ea7f48 R15=ffff888019ea78d8 RIP=ffffffff81130445 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 00007f3b38256900 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=00007ffd2edb5000 CR3=000000000e49e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000