syzkaller login: [ 53.696764] BUG: Bad rss-counter state mm:000000000c8193e2 type:MM_FILEPAGES val:33 [ 53.697766] BUG: Bad rss-counter state mm:000000000c8193e2 type:MM_ANONPAGES val:22 [ 53.855037] ================================================================== [ 53.855934] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 53.856868] Read of size 8 at addr ffff888019fb9310 by task sshd/220 [ 53.857642] [ 53.857990] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 53.859021] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 53.860011] Call Trace: [ 53.860330] [ 53.860613] dump_stack_lvl+0x91/0xf0 [ 53.861107] print_report+0xcc/0x620 [ 53.861589] ? __virt_addr_valid+0x102/0x340 [ 53.862152] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.862775] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.863392] kasan_report+0xbe/0xf0 [ 53.863870] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.864501] vma_interval_tree_remove+0xc75/0xec0 [ 53.865117] vma_prepare+0xc54/0x11a0 [ 53.865618] __split_vma+0x5af/0x950 [ 53.866100] ? __pfx___split_vma+0x10/0x10 [ 53.866636] ? find_held_lock+0x2c/0x110 [ 53.867165] do_vmi_align_munmap+0x2ba/0x11f0 [ 53.867739] ? lock_is_held_type+0x9f/0x120 [ 53.868287] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 53.868904] ? mtree_range_walk+0x632/0x900 [ 53.869468] ? mas_walk+0x5c7/0x7c0 [ 53.869972] do_vmi_munmap+0x1f1/0x2b0 [ 53.870461] mmap_region+0x1f9/0x2660 [ 53.870956] ? vm_mmap_pgoff+0x15c/0x3a0 [ 53.871477] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 53.872193] ? __pfx_lock_acquire+0x10/0x10 [ 53.872730] ? __pfx_mmap_region+0x10/0x10 [ 53.873281] ? security_mmap_addr+0x7d/0xa0 [ 53.873829] ? get_unmapped_area+0x1f5/0x3f0 [ 53.874398] do_mmap+0x854/0xf00 [ 53.874856] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.875364] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 53.875945] ksys_mmap_pgoff+0x3af/0x500 [ 53.876465] do_syscall_64+0x3f/0x90 [ 53.876948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.877609] RIP: 0033:0x7fb88c465d82 [ 53.878083] 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 [ 53.880252] RSP: 002b:00007ffc72b50758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 53.881172] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb88c465d82 [ 53.882035] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb88b89f000 [ 53.882889] RBP: 00007fb88b89f000 R08: 0000000000000009 R09: 0000000000001000 [ 53.883753] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559070167b20 [ 53.884611] R13: 00007ffc72b50770 R14: 00007ffc72b507a0 R15: 00007ffc72b50b00 [ 53.885469] [ 53.885759] [ 53.885983] Allocated by task 213: [ 53.886415] kasan_save_stack+0x22/0x50 [ 53.886935] kasan_set_track+0x25/0x30 [ 53.887431] __kasan_slab_alloc+0x59/0x70 [ 53.887971] kmem_cache_alloc+0x16b/0x370 [ 53.888499] vm_area_dup+0x20/0x160 [ 53.888965] __split_vma+0x170/0x950 [ 53.889433] split_vma+0xc6/0x110 [ 53.889876] mprotect_fixup+0x8d2/0xb30 [ 53.890407] do_mprotect_pkey+0x87e/0xd40 [ 53.890930] __x64_sys_mprotect+0x78/0xc0 [ 53.891452] do_syscall_64+0x3f/0x90 [ 53.891949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.892596] [ 53.892813] Freed by task 19: [ 53.893200] kasan_save_stack+0x22/0x50 [ 53.893705] kasan_set_track+0x25/0x30 [ 53.894208] kasan_save_free_info+0x2b/0x50 [ 53.894741] __kasan_slab_free+0x10a/0x190 [ 53.895280] kmem_cache_free+0x10d/0x4d0 [ 53.895791] rcu_core+0x8c8/0x2860 [ 53.896234] __do_softirq+0x1b7/0x7d4 [ 53.896711] [ 53.896929] Last potentially related work creation: [ 53.897514] kasan_save_stack+0x22/0x50 [ 53.898038] __kasan_record_aux_stack+0x8e/0xa0 [ 53.898615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.899260] remove_vma+0x139/0x170 [ 53.899713] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.900273] do_vmi_munmap+0x1f1/0x2b0 [ 53.900760] __vm_munmap+0x138/0x3a0 [ 53.901229] __x64_sys_munmap+0x59/0x80 [ 53.901726] do_syscall_64+0x3f/0x90 [ 53.902247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.902889] [ 53.903106] The buggy address belongs to the object at ffff888019fb92b8 [ 53.903106] which belongs to the cache vm_area_struct of size 168 [ 53.904560] The buggy address is located 88 bytes inside of [ 53.904560] freed 168-byte region [ffff888019fb92b8, ffff888019fb9360) [ 53.906020] [ 53.906300] The buggy address belongs to the physical page: [ 53.907126] page:00000000c52e8e87 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fb9 [ 53.908490] memcg:ffff88800f101a01 [ 53.909017] flags: 0x100000000000200(slab|node=0|zone=1) [ 53.909807] page_type: 0xffffffff() [ 53.910384] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 53.911293] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f101a01 [ 53.912203] page dumped because: kasan: bad access detected [ 53.912864] [ 53.913080] Memory state around the buggy address: [ 53.913668] ffff888019fb9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 53.914528] ffff888019fb9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 53.915370] >ffff888019fb9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 53.916208] ^ [ 53.916668] ffff888019fb9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 53.917515] ffff888019fb9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 53.918371] ================================================================== [ 53.919504] Disabling lock debugging due to kernel taint [ 55.911106] BUG: Bad rss-counter state mm:000000000e20d9f5 type:MM_FILEPAGES val:33 [ 55.912274] BUG: Bad rss-counter state mm:000000000e20d9f5 type:MM_ANONPAGES val:22 [ 56.397247] BUG: Bad rss-counter state mm:00000000adc22b52 type:MM_FILEPAGES val:33 [ 56.398290] BUG: Bad rss-counter state mm:00000000adc22b52 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30409' (ECDSA) to the list of known hosts. 2023/06/19 22:17:00 fuzzer started 2023/06/19 22:17:00 dialing manager at localhost:44161 2023/06/19 22:17:00 checking machine... 2023/06/19 22:17:00 checking revisions... [ 57.128367] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:17:00 testing simple program... [ 57.175708] cgroup: Unknown subsys name 'net' [ 57.235643] cgroup: Unknown subsys name 'rlimit' [ 58.306483] BUG: Bad rss-counter state mm:00000000cedb85e7 type:MM_FILEPAGES val:173 [ 58.307923] BUG: Bad rss-counter state mm:00000000cedb85e7 type:MM_ANONPAGES val:50 executing program executing program executing program VM DIAGNOSIS: 22:16:35 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11002ce2f93 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff888016717c88 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888019152800 R15=0000000000000000 RIP=ffffffff812d8ed0 RFL=00000247 [---Z-PC] 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 00007f5905164900 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=00007f5905719650 CR3=000000001c990000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffd06f75b38 CR3=000000000e48a000 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=2039353a36313a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a36313a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000