syzkaller login: [ 43.107094] BUG: Bad rss-counter state mm:00000000f0aed436 type:MM_FILEPAGES val:33 [ 43.108723] BUG: Bad rss-counter state mm:00000000f0aed436 type:MM_ANONPAGES val:22 [ 43.268966] ================================================================== [ 43.270045] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.271150] Read of size 8 at addr ffff888016c48c20 by task sshd/219 [ 43.272201] [ 43.272476] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.273591] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.274666] Call Trace: [ 43.275003] [ 43.275299] dump_stack_lvl+0x91/0xf0 [ 43.275816] print_report+0xcc/0x620 [ 43.276347] ? __virt_addr_valid+0x102/0x340 [ 43.276962] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.277616] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.278264] kasan_report+0xbe/0xf0 [ 43.278755] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.279397] vma_interval_tree_remove+0xc75/0xec0 [ 43.280026] vma_prepare+0xc54/0x11a0 [ 43.280525] __split_vma+0x5af/0x950 [ 43.281018] ? __pfx___split_vma+0x10/0x10 [ 43.281551] ? find_held_lock+0x2c/0x110 [ 43.282070] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.282642] ? lock_is_held_type+0x9f/0x120 [ 43.283187] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.283791] ? mtree_range_walk+0x632/0x900 [ 43.284340] ? mas_walk+0x5c7/0x7c0 [ 43.284811] do_vmi_munmap+0x1f1/0x2b0 [ 43.285338] mmap_region+0x1f9/0x2660 [ 43.285820] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.286365] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.287075] ? __pfx_lock_acquire+0x10/0x10 [ 43.287613] ? __pfx_mmap_region+0x10/0x10 [ 43.288143] ? security_mmap_addr+0x7d/0xa0 [ 43.288677] ? get_unmapped_area+0x1f5/0x3f0 [ 43.289243] do_mmap+0x854/0xf00 [ 43.289691] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.290192] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.290754] ksys_mmap_pgoff+0x3af/0x500 [ 43.291262] do_syscall_64+0x3f/0x90 [ 43.291740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.292385] RIP: 0033:0x7f75cad73d82 [ 43.292856] 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 [ 43.294969] RSP: 002b:00007ffe3095e298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.295872] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75cad73d82 [ 43.296718] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75ca1ad000 [ 43.297591] RBP: 00007f75ca1ad000 R08: 0000000000000009 R09: 0000000000001000 [ 43.298432] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560116bd1f70 [ 43.299277] R13: 00007ffe3095e2b0 R14: 00007ffe3095e2e0 R15: 00007ffe3095e640 [ 43.300131] [ 43.300425] [ 43.300641] Allocated by task 212: [ 43.301081] kasan_save_stack+0x22/0x50 [ 43.301591] kasan_set_track+0x25/0x30 [ 43.302083] __kasan_slab_alloc+0x59/0x70 [ 43.302612] kmem_cache_alloc+0x16b/0x370 [ 43.303141] vm_area_dup+0x20/0x160 [ 43.303601] __split_vma+0x170/0x950 [ 43.304071] split_vma+0xc6/0x110 [ 43.304513] mprotect_fixup+0x8d2/0xb30 [ 43.305030] do_mprotect_pkey+0x87e/0xd40 [ 43.305562] __x64_sys_mprotect+0x78/0xc0 [ 43.306092] do_syscall_64+0x3f/0x90 [ 43.306567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.307211] [ 43.307425] Freed by task 202: [ 43.307824] kasan_save_stack+0x22/0x50 [ 43.308330] kasan_set_track+0x25/0x30 [ 43.308837] kasan_save_free_info+0x2b/0x50 [ 43.309367] __kasan_slab_free+0x10a/0x190 [ 43.309908] kmem_cache_free+0x10d/0x4d0 [ 43.310419] rcu_core+0x8c8/0x2860 [ 43.310862] __do_softirq+0x1b7/0x7d4 [ 43.311350] [ 43.311564] Last potentially related work creation: [ 43.312159] kasan_save_stack+0x22/0x50 [ 43.312683] __kasan_record_aux_stack+0x8e/0xa0 [ 43.313285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.314047] remove_vma+0x139/0x170 [ 43.314538] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.315146] do_vmi_munmap+0x1f1/0x2b0 [ 43.315681] __vm_munmap+0x138/0x3a0 [ 43.316189] __x64_sys_munmap+0x59/0x80 [ 43.316735] do_syscall_64+0x3f/0x90 [ 43.317271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.317967] [ 43.318209] The buggy address belongs to the object at ffff888016c48bc8 [ 43.318209] which belongs to the cache vm_area_struct of size 168 [ 43.319814] The buggy address is located 88 bytes inside of [ 43.319814] freed 168-byte region [ffff888016c48bc8, ffff888016c48c70) [ 43.321393] [ 43.321632] The buggy address belongs to the physical page: [ 43.322357] page:00000000745985d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c48 [ 43.323554] memcg:ffff888019fe1901 [ 43.324023] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.324737] page_type: 0xffffffff() [ 43.325255] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.326280] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fe1901 [ 43.327270] page dumped because: kasan: bad access detected [ 43.328002] [ 43.328241] Memory state around the buggy address: [ 43.328899] ffff888016c48b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.329843] ffff888016c48b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 43.330780] >ffff888016c48c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 43.331711] ^ [ 43.332290] ffff888016c48c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 43.333247] ffff888016c48d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 43.334181] ================================================================== [ 43.335170] Disabling lock debugging due to kernel taint [ 45.311078] BUG: Bad rss-counter state mm:000000006527f44c type:MM_FILEPAGES val:33 [ 45.312122] BUG: Bad rss-counter state mm:000000006527f44c type:MM_ANONPAGES val:22 [ 45.776180] BUG: Bad rss-counter state mm:0000000056167b33 type:MM_FILEPAGES val:33 [ 45.776927] BUG: Bad rss-counter state mm:0000000056167b33 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44596' (ECDSA) to the list of known hosts. 2023/06/19 12:41:33 fuzzer started 2023/06/19 12:41:33 dialing manager at localhost:44161 2023/06/19 12:41:33 checking machine... 2023/06/19 12:41:33 checking revisions... [ 46.495054] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:41:33 testing simple program... [ 46.546365] cgroup: Unknown subsys name 'net' [ 46.602788] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:41:20 Registers: info registers vcpu 0 RAX=000000167c2e8fe8 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=0000000000054a43 RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f249a R11=0000000000000001 R12=0000000000054a43 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000012 [----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 00007f1cf5276900 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=00007f1cf582e0b0 CR3=000000001caac000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110019e4bdb RBX=ffff88800cf25ea8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cf25ed8 RBP=ffff88800b69a2f0 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800b69a178 R14=ffffffff813782a8 R15=ffff88800eed3000 RIP=ffffffff8184636c RFL=00000046 [---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=00007fe8a61d3750 CR3=0000000016ed0000 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=2033333a31343a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a31343a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000