syzkaller login: [ 30.751392] BUG: Bad rss-counter state mm:0000000076c6d51e type:MM_FILEPAGES val:33 [ 30.752827] BUG: Bad rss-counter state mm:0000000076c6d51e type:MM_ANONPAGES val:22 [ 30.893820] ================================================================== [ 30.894728] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.895672] Read of size 8 at addr ffff888018224228 by task sshd/220 [ 30.896439] [ 30.896664] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.897628] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.898663] Call Trace: [ 30.898983] [ 30.899298] dump_stack_lvl+0x91/0xf0 [ 30.899808] print_report+0xcc/0x620 [ 30.900299] ? __virt_addr_valid+0x102/0x340 [ 30.900849] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.901466] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.902091] kasan_report+0xbe/0xf0 [ 30.902568] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.903193] vma_interval_tree_remove+0xc75/0xec0 [ 30.903805] vma_prepare+0xc54/0x11a0 [ 30.904305] __split_vma+0x5af/0x950 [ 30.904787] ? __pfx___split_vma+0x10/0x10 [ 30.905318] ? find_held_lock+0x2c/0x110 [ 30.905850] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.906413] ? lock_is_held_type+0x9f/0x120 [ 30.906966] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.907579] ? mtree_range_walk+0x632/0x900 [ 30.908132] ? mas_walk+0x5c7/0x7c0 [ 30.908613] do_vmi_munmap+0x1f1/0x2b0 [ 30.909117] mmap_region+0x1f9/0x2660 [ 30.909603] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.910133] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.910848] ? __pfx_lock_acquire+0x10/0x10 [ 30.911391] ? __pfx_mmap_region+0x10/0x10 [ 30.911926] ? security_mmap_addr+0x7d/0xa0 [ 30.912454] ? get_unmapped_area+0x1f5/0x3f0 [ 30.913006] do_mmap+0x854/0xf00 [ 30.913454] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.913961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.914532] ksys_mmap_pgoff+0x3af/0x500 [ 30.915035] do_syscall_64+0x3f/0x90 [ 30.915512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.916152] RIP: 0033:0x7fe118cbdd82 [ 30.916607] 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 [ 30.918766] RSP: 002b:00007ffef27b0f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.919676] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe118cbdd82 [ 30.920536] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1180f7000 [ 30.921383] RBP: 00007fe1180f7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.922246] R10: 0000000000000812 R11: 0000000000000206 R12: 00005652f3390ec0 [ 30.923094] R13: 00007ffef27b0f80 R14: 00007ffef27b0fb0 R15: 00007ffef27b1310 [ 30.923958] [ 30.924246] [ 30.924462] Allocated by task 213: [ 30.924889] kasan_save_stack+0x22/0x50 [ 30.925393] kasan_set_track+0x25/0x30 [ 30.925904] __kasan_slab_alloc+0x59/0x70 [ 30.926429] kmem_cache_alloc+0x16b/0x370 [ 30.926945] vm_area_dup+0x20/0x160 [ 30.927403] __split_vma+0x170/0x950 [ 30.927868] split_vma+0xc6/0x110 [ 30.928309] mprotect_fixup+0x8d2/0xb30 [ 30.928822] do_mprotect_pkey+0x87e/0xd40 [ 30.929338] __x64_sys_mprotect+0x78/0xc0 [ 30.929870] do_syscall_64+0x3f/0x90 [ 30.930345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.931004] [ 30.931217] Freed by task 213: [ 30.931609] kasan_save_stack+0x22/0x50 [ 30.932117] kasan_set_track+0x25/0x30 [ 30.932602] kasan_save_free_info+0x2b/0x50 [ 30.933131] __kasan_slab_free+0x10a/0x190 [ 30.933660] kmem_cache_free+0x10d/0x4d0 [ 30.934189] rcu_core+0x8c8/0x2860 [ 30.934641] __do_softirq+0x1b7/0x7d4 [ 30.935110] [ 30.935328] Last potentially related work creation: [ 30.935907] kasan_save_stack+0x22/0x50 [ 30.936401] __kasan_record_aux_stack+0x8e/0xa0 [ 30.936965] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.937605] remove_vma+0x139/0x170 [ 30.938061] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.938618] do_vmi_munmap+0x1f1/0x2b0 [ 30.939104] __vm_munmap+0x138/0x3a0 [ 30.939565] __x64_sys_munmap+0x59/0x80 [ 30.940058] do_syscall_64+0x3f/0x90 [ 30.940533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.941184] [ 30.941400] Second to last potentially related work creation: [ 30.942089] kasan_save_stack+0x22/0x50 [ 30.942595] __kasan_record_aux_stack+0x8e/0xa0 [ 30.943172] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.943815] remove_vma+0x139/0x170 [ 30.944264] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.944824] do_vmi_munmap+0x1f1/0x2b0 [ 30.945314] mmap_region+0x1f9/0x2660 [ 30.945796] do_mmap+0x854/0xf00 [ 30.946236] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.946725] ksys_mmap_pgoff+0x3af/0x500 [ 30.947222] do_syscall_64+0x3f/0x90 [ 30.947700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.948336] [ 30.948578] The buggy address belongs to the object at ffff8880182241d0 [ 30.948578] which belongs to the cache vm_area_struct of size 168 [ 30.950085] The buggy address is located 88 bytes inside of [ 30.950085] freed 168-byte region [ffff8880182241d0, ffff888018224278) [ 30.951508] [ 30.951722] The buggy address belongs to the physical page: [ 30.952391] page:000000002b8fb184 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18224 [ 30.953481] memcg:ffff888019deee01 [ 30.953926] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.954571] page_type: 0xffffffff() [ 30.955029] raw: 0100000000000200 ffff8880087a0c80 ffffea00006789c0 0000000000000004 [ 30.955946] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019deee01 [ 30.956861] page dumped because: kasan: bad access detected [ 30.957526] [ 30.957743] Memory state around the buggy address: [ 30.958339] ffff888018224100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.959189] ffff888018224180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.960048] >ffff888018224200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.960892] ^ [ 30.961448] ffff888018224280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.962316] ffff888018224300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.963156] ================================================================== [ 30.964457] Disabling lock debugging due to kernel taint [ 33.077219] BUG: Bad rss-counter state mm:00000000464685fe type:MM_FILEPAGES val:33 [ 33.078261] BUG: Bad rss-counter state mm:00000000464685fe type:MM_ANONPAGES val:22 [ 33.563124] BUG: Bad rss-counter state mm:000000002cc47dbd type:MM_FILEPAGES val:33 [ 33.564813] BUG: Bad rss-counter state mm:000000002cc47dbd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2502' (ECDSA) to the list of known hosts. 2023/06/21 07:10:57 fuzzer started 2023/06/21 07:10:57 dialing manager at localhost:36067 2023/06/21 07:10:57 checking machine... 2023/06/21 07:10:57 checking revisions... [ 34.294750] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:10:57 testing simple program... [ 34.337170] cgroup: Unknown subsys name 'net' [ 34.393876] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:10:57 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=0000000000000000 RCX=0000000080000100 RDX=ffff888019cad1c0 RSI=ffffffff814c857a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff88800d9e0480 RIP=ffffffff814c0871 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 00007fa372f8c900 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=00007ffdffc5c000 CR3=000000001a018000 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=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 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=00007fb2859d6320 CR3=0000000015c06000 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=2036353a30313a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a30313a3730203132 XMM08=00007f84200028900000004900000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000