syzkaller login: [ 32.745237] BUG: Bad rss-counter state mm:00000000ec6fb6db type:MM_FILEPAGES val:33 [ 32.746471] BUG: Bad rss-counter state mm:00000000ec6fb6db type:MM_ANONPAGES val:22 [ 32.790034] ================================================================== [ 32.790958] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.791886] Read of size 8 at addr ffff888016857ed8 by task sshd/221 [ 32.792663] [ 32.792879] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.793764] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.794736] Call Trace: [ 32.795056] [ 32.795338] dump_stack_lvl+0x91/0xf0 [ 32.795841] print_report+0xcc/0x620 [ 32.796327] ? __virt_addr_valid+0x102/0x340 [ 32.796873] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.797515] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.798133] kasan_report+0xbe/0xf0 [ 32.798606] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.799235] vma_interval_tree_remove+0xc75/0xec0 [ 32.799834] vma_prepare+0xc54/0x11a0 [ 32.800315] __split_vma+0x5af/0x950 [ 32.800782] ? __pfx___split_vma+0x10/0x10 [ 32.801330] ? find_held_lock+0x2c/0x110 [ 32.801848] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.802408] ? lock_is_held_type+0x9f/0x120 [ 32.802940] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.803549] ? mtree_range_walk+0x632/0x900 [ 32.804092] ? mas_walk+0x5c7/0x7c0 [ 32.804563] do_vmi_munmap+0x1f1/0x2b0 [ 32.805053] mmap_region+0x1f9/0x2660 [ 32.805551] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.806062] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.806775] ? __pfx_lock_acquire+0x10/0x10 [ 32.807311] ? __pfx_mmap_region+0x10/0x10 [ 32.807846] ? security_mmap_addr+0x7d/0xa0 [ 32.808375] ? get_unmapped_area+0x1f5/0x3f0 [ 32.808928] do_mmap+0x854/0xf00 [ 32.809384] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.809876] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.810434] ksys_mmap_pgoff+0x3af/0x500 [ 32.810942] do_syscall_64+0x3f/0x90 [ 32.811426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.812080] RIP: 0033:0x7fd3e8bbed82 [ 32.812533] 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 [ 32.814649] RSP: 002b:00007ffebb0aaed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.815546] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd3e8bbed82 [ 32.816402] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3e7ff8000 [ 32.817256] RBP: 00007fd3e7ff8000 R08: 0000000000000009 R09: 0000000000001000 [ 32.818105] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b15cf7ec0 [ 32.818954] R13: 00007ffebb0aaef0 R14: 00007ffebb0aaf20 R15: 00007ffebb0ab280 [ 32.819805] [ 32.820100] [ 32.820312] Allocated by task 214: [ 32.820737] kasan_save_stack+0x22/0x50 [ 32.821252] kasan_set_track+0x25/0x30 [ 32.821743] __kasan_slab_alloc+0x59/0x70 [ 32.822262] kmem_cache_alloc+0x16b/0x370 [ 32.822781] vm_area_dup+0x20/0x160 [ 32.823231] __split_vma+0x170/0x950 [ 32.823693] split_vma+0xc6/0x110 [ 32.824139] mprotect_fixup+0x8d2/0xb30 [ 32.824649] do_mprotect_pkey+0x87e/0xd40 [ 32.825173] __x64_sys_mprotect+0x78/0xc0 [ 32.825708] do_syscall_64+0x3f/0x90 [ 32.826198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.826867] [ 32.827093] Freed by task 214: [ 32.827505] kasan_save_stack+0x22/0x50 [ 32.828037] kasan_set_track+0x25/0x30 [ 32.828554] kasan_save_free_info+0x2b/0x50 [ 32.829113] __kasan_slab_free+0x10a/0x190 [ 32.829688] kmem_cache_free+0x10d/0x4d0 [ 32.830219] rcu_core+0x8c8/0x2860 [ 32.830678] __do_softirq+0x1b7/0x7d4 [ 32.831172] [ 32.831394] Last potentially related work creation: [ 32.832016] kasan_save_stack+0x22/0x50 [ 32.832542] __kasan_record_aux_stack+0x8e/0xa0 [ 32.833149] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.833848] remove_vma+0x139/0x170 [ 32.834333] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.834928] do_vmi_munmap+0x1f1/0x2b0 [ 32.835449] __vm_munmap+0x138/0x3a0 [ 32.835939] __x64_sys_munmap+0x59/0x80 [ 32.836465] do_syscall_64+0x3f/0x90 [ 32.836973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.837661] [ 32.837887] The buggy address belongs to the object at ffff888016857e80 [ 32.837887] which belongs to the cache vm_area_struct of size 168 [ 32.839466] The buggy address is located 88 bytes inside of [ 32.839466] freed 168-byte region [ffff888016857e80, ffff888016857f28) [ 32.840982] [ 32.841227] The buggy address belongs to the physical page: [ 32.841945] page:00000000f77e696a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16857 [ 32.843129] memcg:ffff8880164c5301 [ 32.843587] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.844285] page_type: 0xffffffff() [ 32.844773] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.845775] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164c5301 [ 32.846744] page dumped because: kasan: bad access detected [ 32.847456] [ 32.847685] Memory state around the buggy address: [ 32.848304] ffff888016857d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.849239] ffff888016857e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.850165] >ffff888016857e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.851075] ^ [ 32.851836] ffff888016857f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.852741] ffff888016857f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.853663] ================================================================== [ 32.855006] Disabling lock debugging due to kernel taint [ 34.817682] BUG: Bad rss-counter state mm:0000000028b0010a type:MM_FILEPAGES val:33 [ 34.818845] BUG: Bad rss-counter state mm:0000000028b0010a type:MM_ANONPAGES val:22 [ 35.301497] BUG: Bad rss-counter state mm:00000000abb793c5 type:MM_FILEPAGES val:33 [ 35.302673] BUG: Bad rss-counter state mm:00000000abb793c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50928' (ECDSA) to the list of known hosts. 2023/06/19 15:31:14 fuzzer started 2023/06/19 15:31:14 dialing manager at localhost:44161 2023/06/19 15:31:14 checking machine... 2023/06/19 15:31:14 checking revisions... [ 36.015059] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:31:14 testing simple program... [ 36.060694] cgroup: Unknown subsys name 'net' [ 36.111377] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:31:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000031 RCX=0000000000000000 RDX=ffff88800f1fd1c0 RSI=ffffffff81f593ff RDI=ffff8880094d7f40 RBP=ffff88800f4ed000 RSP=ffff8880165b7a78 R8 =0000000000000005 R9 =0000000000000040 R10=0000000000000010 R11=00000000000b6996 R12=ffff88800ffec0d8 R13=ffff8880094d7f00 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff81f5941e 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 00007fd5e8d0f900 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=00007fd5e92c70b0 CR3=00000000095d4000 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=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=00007f7a1ca10310 CR3=000000000c556000 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=0f46cda8d01fb1b4354881becc1e7637 XMM02=ec2efd57dc4c00df000000000011e818 XMM03=d26387841c20862a000000000011e8e8 XMM04=22622ac291fb23d400000000000ae988 XMM05=990d2deb17b1cfd20000000000135ea8 XMM06=c291bd5c70af25b90000000000134f48 XMM07=e042d86d42eb936e0000000000125508 XMM08=d26387841c20862a000000000011e8e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000