syzkaller login: [ 77.703006] BUG: Bad rss-counter state mm:00000000f0d0bb78 type:MM_FILEPAGES val:33 [ 77.704408] BUG: Bad rss-counter state mm:00000000f0d0bb78 type:MM_ANONPAGES val:22 [ 77.859188] ================================================================== [ 77.860277] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 77.861569] Read of size 8 at addr ffff88800fdc4310 by task sshd/221 [ 77.862503] [ 77.862747] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 77.863880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 77.864927] Call Trace: [ 77.865275] [ 77.865594] dump_stack_lvl+0x91/0xf0 [ 77.866118] print_report+0xcc/0x620 [ 77.866640] ? __virt_addr_valid+0x102/0x340 [ 77.867227] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.867886] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.868553] kasan_report+0xbe/0xf0 [ 77.869080] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.869792] vma_interval_tree_remove+0xc75/0xec0 [ 77.870460] vma_prepare+0xc54/0x11a0 [ 77.870990] __split_vma+0x5af/0x950 [ 77.871516] ? __pfx___split_vma+0x10/0x10 [ 77.872102] ? find_held_lock+0x2c/0x110 [ 77.872676] do_vmi_align_munmap+0x2ba/0x11f0 [ 77.873306] ? lock_is_held_type+0x9f/0x120 [ 77.873911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 77.874585] ? mtree_range_walk+0x632/0x900 [ 77.875196] ? mas_walk+0x5c7/0x7c0 [ 77.875728] do_vmi_munmap+0x1f1/0x2b0 [ 77.876277] mmap_region+0x1f9/0x2660 [ 77.876812] ? vm_mmap_pgoff+0x15c/0x3a0 [ 77.877380] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 77.878202] ? __pfx_lock_acquire+0x10/0x10 [ 77.878799] ? __pfx_mmap_region+0x10/0x10 [ 77.879391] ? security_mmap_addr+0x7d/0xa0 [ 77.879987] ? get_unmapped_area+0x1f5/0x3f0 [ 77.880600] do_mmap+0x854/0xf00 [ 77.881089] vm_mmap_pgoff+0x1a6/0x3a0 [ 77.881650] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 77.882274] ksys_mmap_pgoff+0x3af/0x500 [ 77.882837] do_syscall_64+0x3f/0x90 [ 77.883369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.884090] RIP: 0033:0x7f499cd15d82 [ 77.884599] 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 [ 77.886985] RSP: 002b:00007ffc7b012a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 77.888002] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f499cd15d82 [ 77.888943] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f499c14f000 [ 77.889904] RBP: 00007f499c14f000 R08: 0000000000000009 R09: 0000000000001000 [ 77.890852] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a72591eec0 [ 77.891797] R13: 00007ffc7b012aa0 R14: 00007ffc7b012ad0 R15: 00007ffc7b012e30 [ 77.892751] [ 77.893079] [ 77.893319] Allocated by task 214: [ 77.893810] kasan_save_stack+0x22/0x50 [ 77.894373] kasan_set_track+0x25/0x30 [ 77.894919] __kasan_slab_alloc+0x59/0x70 [ 77.895498] kmem_cache_alloc+0x16b/0x370 [ 77.896072] vm_area_dup+0x20/0x160 [ 77.896577] __split_vma+0x170/0x950 [ 77.897096] split_vma+0xc6/0x110 [ 77.897603] mprotect_fixup+0x8d2/0xb30 [ 77.898164] do_mprotect_pkey+0x87e/0xd40 [ 77.898750] __x64_sys_mprotect+0x78/0xc0 [ 77.899334] do_syscall_64+0x3f/0x90 [ 77.899859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.900578] [ 77.900820] Freed by task 214: [ 77.901259] kasan_save_stack+0x22/0x50 [ 77.901827] kasan_set_track+0x25/0x30 [ 77.902468] kasan_save_free_info+0x2b/0x50 [ 77.903071] __kasan_slab_free+0x10a/0x190 [ 77.903667] kmem_cache_free+0x10d/0x4d0 [ 77.904234] rcu_core+0x8c8/0x2860 [ 77.904727] __do_softirq+0x1b7/0x7d4 [ 77.905255] [ 77.905518] Last potentially related work creation: [ 77.906167] kasan_save_stack+0x22/0x50 [ 77.906730] __kasan_record_aux_stack+0x8e/0xa0 [ 77.907375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 77.908094] remove_vma+0x139/0x170 [ 77.908597] do_vmi_align_munmap+0xd4a/0x11f0 [ 77.909215] do_vmi_munmap+0x1f1/0x2b0 [ 77.909762] __vm_munmap+0x138/0x3a0 [ 77.910290] __x64_sys_munmap+0x59/0x80 [ 77.910847] do_syscall_64+0x3f/0x90 [ 77.911374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.912097] [ 77.912338] The buggy address belongs to the object at ffff88800fdc42b8 [ 77.912338] which belongs to the cache vm_area_struct of size 168 [ 77.914005] The buggy address is located 88 bytes inside of [ 77.914005] freed 168-byte region [ffff88800fdc42b8, ffff88800fdc4360) [ 77.915567] [ 77.915805] The buggy address belongs to the physical page: [ 77.916539] page:000000000bdad1cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdc4 [ 77.917766] memcg:ffff888018d4f701 [ 77.918241] flags: 0x100000000000200(slab|node=0|zone=1) [ 77.918962] page_type: 0xffffffff() [ 77.919464] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 77.920487] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d4f701 [ 77.921511] page dumped because: kasan: bad access detected [ 77.922254] [ 77.922492] Memory state around the buggy address: [ 77.923138] ffff88800fdc4200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 77.924099] ffff88800fdc4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 77.925058] >ffff88800fdc4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 77.926014] ^ [ 77.926516] ffff88800fdc4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 77.927441] ffff88800fdc4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 77.928354] ================================================================== [ 77.929453] Disabling lock debugging due to kernel taint [ 80.537358] BUG: Bad rss-counter state mm:000000005bd47975 type:MM_FILEPAGES val:33 [ 80.538383] BUG: Bad rss-counter state mm:000000005bd47975 type:MM_ANONPAGES val:22 [ 80.980471] BUG: Bad rss-counter state mm:000000008da422be type:MM_FILEPAGES val:33 [ 80.981535] BUG: Bad rss-counter state mm:000000008da422be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16028' (ECDSA) to the list of known hosts. 2023/06/20 03:58:04 fuzzer started 2023/06/20 03:58:04 dialing manager at localhost:44161 2023/06/20 03:58:04 checking machine... 2023/06/20 03:58:04 checking revisions... [ 81.649691] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:58:05 testing simple program... [ 81.683472] cgroup: Unknown subsys name 'net' [ 81.731710] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:57:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000010 RCX=ffffffff8386c1ad RDX=ffff8880169e0000 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff888016affc48 RSP=ffff888016affb20 R8 =0000000000000004 R9 =000000000000000a R10=000000000000000c R11=0000000000000000 R12=000000000000000c R13=00000000000000e6 R14=ffff888008c78000 R15=ffff888013a2f000 RIP=ffffffff814c0245 RFL=00000293 [--S-A-C] 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 00007f45d6e26900 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=00007f45d73dd618 CR3=000000000f2b6000 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=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=ffff888008d751c0 RBX=ffffffff813ad420 RCX=ffff88806cf09b30 RDX=0000000000000000 RSI=ffff888008d751c0 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000006 R9 =0000000000000002 R10=ffffed1001ed3b0a R11=0000000000000000 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800f69d8d0 RIP=ffffffff81132a70 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 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=00007f6d0244aa10 CR3=000000000c618000 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=42daf1a187a9fa907e4744ea0f97279e XMM02=0000000000121408eff9b2d0a8fce9cb XMM03=00000000001214d82c67c8bc2e329bc3 XMM04=4b51c8494d51035500000000000ae988 XMM05=e4cb8bb95a7664b60000000000138c28 XMM06=c291bd5c70af25b90000000000138ab0 XMM07=e042d86d42eb936e0000000000128c78 XMM08=e0a54f2a9861ca9100000000001214d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000