syzkaller login: [ 55.535792] BUG: Bad rss-counter state mm:0000000074e1c149 type:MM_FILEPAGES val:33 [ 55.537090] BUG: Bad rss-counter state mm:0000000074e1c149 type:MM_ANONPAGES val:22 [ 55.712369] ================================================================== [ 55.713276] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.714209] Read of size 8 at addr ffff888019f25b38 by task sshd/219 [ 55.714974] [ 55.715195] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.716186] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.717144] Call Trace: [ 55.717460] [ 55.717745] dump_stack_lvl+0x91/0xf0 [ 55.718240] print_report+0xcc/0x620 [ 55.718770] ? __virt_addr_valid+0x102/0x340 [ 55.719334] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.719987] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.720617] kasan_report+0xbe/0xf0 [ 55.721099] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.721729] vma_interval_tree_remove+0xc75/0xec0 [ 55.722342] vma_prepare+0xc54/0x11a0 [ 55.722823] __split_vma+0x5af/0x950 [ 55.723303] ? __pfx___split_vma+0x10/0x10 [ 55.723845] ? find_held_lock+0x2c/0x110 [ 55.724382] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.724963] ? lock_is_held_type+0x9f/0x120 [ 55.725510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.726126] ? mtree_range_walk+0x632/0x900 [ 55.726690] ? mas_walk+0x5c7/0x7c0 [ 55.727172] do_vmi_munmap+0x1f1/0x2b0 [ 55.727669] mmap_region+0x1f9/0x2660 [ 55.728180] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.728697] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.729416] ? __pfx_lock_acquire+0x10/0x10 [ 55.729961] ? __pfx_mmap_region+0x10/0x10 [ 55.730525] ? security_mmap_addr+0x7d/0xa0 [ 55.731149] ? get_unmapped_area+0x1f5/0x3f0 [ 55.731793] do_mmap+0x854/0xf00 [ 55.732316] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.732892] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.733553] ksys_mmap_pgoff+0x3af/0x500 [ 55.734148] do_syscall_64+0x3f/0x90 [ 55.734715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.735467] RIP: 0033:0x7f75c67fdd82 [ 55.736009] 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 [ 55.738461] RSP: 002b:00007fffefeb0438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.739462] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75c67fdd82 [ 55.740333] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75c5c37000 [ 55.741185] RBP: 00007f75c5c37000 R08: 0000000000000009 R09: 0000000000001000 [ 55.742026] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b1589bec0 [ 55.742870] R13: 00007fffefeb0450 R14: 00007fffefeb0480 R15: 00007fffefeb07e0 [ 55.743720] [ 55.744021] [ 55.744239] Allocated by task 212: [ 55.744673] kasan_save_stack+0x22/0x50 [ 55.745183] kasan_set_track+0x25/0x30 [ 55.745680] __kasan_slab_alloc+0x59/0x70 [ 55.746216] kmem_cache_alloc+0x16b/0x370 [ 55.746731] vm_area_dup+0x20/0x160 [ 55.747194] __split_vma+0x170/0x950 [ 55.747667] split_vma+0xc6/0x110 [ 55.748132] mprotect_fixup+0x8d2/0xb30 [ 55.748638] do_mprotect_pkey+0x87e/0xd40 [ 55.749164] __x64_sys_mprotect+0x78/0xc0 [ 55.749688] do_syscall_64+0x3f/0x90 [ 55.750170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.750817] [ 55.751035] Freed by task 212: [ 55.751431] kasan_save_stack+0x22/0x50 [ 55.751945] kasan_set_track+0x25/0x30 [ 55.752442] kasan_save_free_info+0x2b/0x50 [ 55.752981] __kasan_slab_free+0x10a/0x190 [ 55.753518] kmem_cache_free+0x10d/0x4d0 [ 55.754030] rcu_core+0x8c8/0x2860 [ 55.754480] __do_softirq+0x1b7/0x7d4 [ 55.754955] [ 55.755169] Last potentially related work creation: [ 55.755751] kasan_save_stack+0x22/0x50 [ 55.756274] __kasan_record_aux_stack+0x8e/0xa0 [ 55.756848] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.757488] remove_vma+0x139/0x170 [ 55.757939] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.758498] do_vmi_munmap+0x1f1/0x2b0 [ 55.758983] __vm_munmap+0x138/0x3a0 [ 55.759460] __x64_sys_munmap+0x59/0x80 [ 55.760034] do_syscall_64+0x3f/0x90 [ 55.760563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.761279] [ 55.761529] The buggy address belongs to the object at ffff888019f25ae0 [ 55.761529] which belongs to the cache vm_area_struct of size 168 [ 55.763177] The buggy address is located 88 bytes inside of [ 55.763177] freed 168-byte region [ffff888019f25ae0, ffff888019f25b88) [ 55.764766] [ 55.765005] The buggy address belongs to the physical page: [ 55.765744] page:000000000a113be4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f25 [ 55.766967] memcg:ffff88800c670201 [ 55.767447] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.768172] page_type: 0xffffffff() [ 55.768684] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 55.769683] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c670201 [ 55.770641] page dumped because: kasan: bad access detected [ 55.771339] [ 55.771566] Memory state around the buggy address: [ 55.772195] ffff888019f25a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.773102] ffff888019f25a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 55.774009] >ffff888019f25b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.774914] ^ [ 55.775562] ffff888019f25b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 55.776490] ffff888019f25c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 55.777394] ================================================================== [ 55.778479] Disabling lock debugging due to kernel taint [ 57.505675] BUG: Bad rss-counter state mm:00000000ea03ab29 type:MM_FILEPAGES val:33 [ 57.507195] BUG: Bad rss-counter state mm:00000000ea03ab29 type:MM_ANONPAGES val:22 [ 57.977778] BUG: Bad rss-counter state mm:00000000b0842383 type:MM_FILEPAGES val:33 [ 57.979043] BUG: Bad rss-counter state mm:00000000b0842383 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21933' (ECDSA) to the list of known hosts. 2023/06/19 15:13:53 fuzzer started 2023/06/19 15:13:54 dialing manager at localhost:44161 2023/06/19 15:13:54 checking machine... 2023/06/19 15:13:54 checking revisions... [ 58.743340] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:13:54 testing simple program... [ 58.794589] cgroup: Unknown subsys name 'net' [ 58.839401] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:13:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000001000 RCX=0000000000000000 RDX=1ffff11001fee418 RSI=0000000000000008 RDI=ffff88800ff720c0 RBP=ffff88800ff720b8 RSP=ffff8880165477a8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000008 R13=0000000000000c40 R14=ffff88800ff720b8 R15=ffff88800ff72000 RIP=ffffffff812e0635 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 00007f48bbd9e700 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=00007f8893c42000 CR3=000000000f72a000 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=2033353a33313a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a33313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffba0b864 RBX=ffffffff85dfc4f4 RCX=ffffffff81807eba RDX=0000000000000000 RSI=ffffffff86136d7c RDI=ffffffff85dfc4f4 RBP=ffffffff85dfc4f4 RSP=ffff88800e80f5e0 R8 =ffffffff86136d7c R9 =ffff88800e80f6d8 R10=0000000000038001 R11=0000000000020c48 R12=ffffffff85dfc4f4 R13=ffffffff85dfc4f4 R14=ffffffff85dfc4f4 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007fb0b2b27900 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=00007ffdf838f000 CR3=0000000019efa000 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=6720646572637465733a4d41503d706f 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