syzkaller login: [ 34.835869] BUG: Bad rss-counter state mm:00000000b9a857a1 type:MM_FILEPAGES val:33 [ 34.837087] BUG: Bad rss-counter state mm:00000000b9a857a1 type:MM_ANONPAGES val:22 [ 34.881740] ================================================================== [ 34.883083] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.884203] Read of size 8 at addr ffff888016b50228 by task sshd/220 [ 34.885168] [ 34.885458] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.886480] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.887589] Call Trace: [ 34.888039] [ 34.888439] dump_stack_lvl+0x91/0xf0 [ 34.889084] print_report+0xcc/0x620 [ 34.889637] ? __virt_addr_valid+0x102/0x340 [ 34.890233] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.890927] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.891614] kasan_report+0xbe/0xf0 [ 34.892131] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.892812] vma_interval_tree_remove+0xc75/0xec0 [ 34.893482] vma_prepare+0xc54/0x11a0 [ 34.893994] __split_vma+0x5af/0x950 [ 34.894528] ? __pfx___split_vma+0x10/0x10 [ 34.895105] ? find_held_lock+0x2c/0x110 [ 34.895688] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.896309] ? lock_is_held_type+0x9f/0x120 [ 34.896897] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.897585] ? mtree_range_walk+0x632/0x900 [ 34.898184] ? mas_walk+0x5c7/0x7c0 [ 34.898730] do_vmi_munmap+0x1f1/0x2b0 [ 34.899260] mmap_region+0x1f9/0x2660 [ 34.899810] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.900365] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.901149] ? __pfx_lock_acquire+0x10/0x10 [ 34.901741] ? __pfx_mmap_region+0x10/0x10 [ 34.902330] ? security_mmap_addr+0x7d/0xa0 [ 34.902916] ? get_unmapped_area+0x1f5/0x3f0 [ 34.903541] do_mmap+0x854/0xf00 [ 34.904011] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.904564] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.905194] ksys_mmap_pgoff+0x3af/0x500 [ 34.905759] do_syscall_64+0x3f/0x90 [ 34.906274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.906975] RIP: 0033:0x7f5a2a62ed82 [ 34.907487] 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 [ 34.909797] RSP: 002b:00007ffedfbce958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.910783] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a2a62ed82 [ 34.911726] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a29a68000 [ 34.912652] RBP: 00007f5a29a68000 R08: 0000000000000009 R09: 0000000000001000 [ 34.913589] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4a3264f70 [ 34.914512] R13: 00007ffedfbce970 R14: 00007ffedfbce9a0 R15: 00007ffedfbced00 [ 34.915444] [ 34.915757] [ 34.915989] Allocated by task 213: [ 34.916479] kasan_save_stack+0x22/0x50 [ 34.917022] kasan_set_track+0x25/0x30 [ 34.917584] __kasan_slab_alloc+0x59/0x70 [ 34.918148] kmem_cache_alloc+0x16b/0x370 [ 34.918713] vm_area_dup+0x20/0x160 [ 34.919199] __split_vma+0x170/0x950 [ 34.919718] split_vma+0xc6/0x110 [ 34.920190] mprotect_fixup+0x8d2/0xb30 [ 34.920734] do_mprotect_pkey+0x87e/0xd40 [ 34.921434] __x64_sys_mprotect+0x78/0xc0 [ 34.922062] do_syscall_64+0x3f/0x90 [ 34.922625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.923401] [ 34.923653] Freed by task 13: [ 34.924204] kasan_save_stack+0x22/0x50 [ 34.924802] kasan_set_track+0x25/0x30 [ 34.925423] kasan_save_free_info+0x2b/0x50 [ 34.926121] __kasan_slab_free+0x10a/0x190 [ 34.926804] kmem_cache_free+0x10d/0x4d0 [ 34.927465] rcu_core+0x8c8/0x2860 [ 34.928036] __do_softirq+0x1b7/0x7d4 [ 34.928651] [ 34.928926] Last potentially related work creation: [ 34.929697] kasan_save_stack+0x22/0x50 [ 34.930340] __kasan_record_aux_stack+0x8e/0xa0 [ 34.931086] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.931911] remove_vma+0x139/0x170 [ 34.932496] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.933259] do_vmi_munmap+0x1f1/0x2b0 [ 34.933894] __vm_munmap+0x138/0x3a0 [ 34.934402] __x64_sys_munmap+0x59/0x80 [ 34.934914] do_syscall_64+0x3f/0x90 [ 34.935400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.936059] [ 34.936277] The buggy address belongs to the object at ffff888016b501d0 [ 34.936277] which belongs to the cache vm_area_struct of size 168 [ 34.937808] The buggy address is located 88 bytes inside of [ 34.937808] freed 168-byte region [ffff888016b501d0, ffff888016b50278) [ 34.939254] [ 34.939478] The buggy address belongs to the physical page: [ 34.940159] page:00000000d06ac5ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b50 [ 34.941305] memcg:ffff88800f378801 [ 34.941742] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.942405] page_type: 0xffffffff() [ 34.942869] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.943818] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f378801 [ 34.944756] page dumped because: kasan: bad access detected [ 34.945451] [ 34.945669] Memory state around the buggy address: [ 34.946268] ffff888016b50100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.947150] ffff888016b50180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.948042] >ffff888016b50200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.948915] ^ [ 34.949504] ffff888016b50280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.950387] ffff888016b50300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.951266] ================================================================== [ 34.952321] Disabling lock debugging due to kernel taint [ 36.904331] BUG: Bad rss-counter state mm:000000009a922a99 type:MM_FILEPAGES val:33 [ 36.905367] BUG: Bad rss-counter state mm:000000009a922a99 type:MM_ANONPAGES val:22 [ 37.381415] BUG: Bad rss-counter state mm:00000000b4df242c type:MM_FILEPAGES val:33 [ 37.382488] BUG: Bad rss-counter state mm:00000000b4df242c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2856' (ECDSA) to the list of known hosts. 2023/06/20 02:40:30 fuzzer started 2023/06/20 02:40:31 dialing manager at localhost:44161 2023/06/20 02:40:31 checking machine... 2023/06/20 02:40:31 checking revisions... [ 38.159204] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:40:31 testing simple program... [ 38.216605] cgroup: Unknown subsys name 'net' [ 38.268901] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:40:26 Registers: info registers vcpu 0 RAX=ffffffff8614db51 RBX=0000000000000001 RCX=ffffffff8614db4c RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff85e0b8d4 RBP=ffff88800f09faf8 RSP=ffff88800f09fa30 R8 =ffffffff8614db4c R9 =ffff88800f09fae0 R10=0000000000038001 R11=0000000000024940 R12=ffff88800f09fb00 R13=ffff88800f09fae8 R14=ffff88800f09fae1 R15=ffff88800f09faa0 RIP=ffffffff81130a72 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 00007fea97d2e900 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=00007fea982e5618 CR3=000000000da68000 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=563412feff00545000000000000080fe 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f15bca61b10 CR3=000000000d61a000 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=e2cdfebbf461c7acc2446538a33d1c97 XMM02=0000000000122570ec2efd57dc4c00df XMM03=00000000001256008de3019f18ef2e3c XMM04=b99029ca5825181800000000000ae988 XMM05=19e9129bd510f2350000000000135190 XMM06=db882a4da66066240000000000133ff8 XMM07=e042d86d42eb936e0000000000125880 XMM08=8de3019f18ef2e3c00000000001225d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000