syzkaller login: [ 30.582900] BUG: Bad rss-counter state mm:000000009863efac type:MM_FILEPAGES val:33 [ 30.584201] BUG: Bad rss-counter state mm:000000009863efac type:MM_ANONPAGES val:22 [ 30.735708] ================================================================== [ 30.736609] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.737549] Read of size 8 at addr ffff888016cb74e0 by task sshd/220 [ 30.738406] [ 30.738637] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.739504] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.740508] Call Trace: [ 30.740828] [ 30.741115] dump_stack_lvl+0x91/0xf0 [ 30.741610] print_report+0xcc/0x620 [ 30.742097] ? __virt_addr_valid+0x102/0x340 [ 30.742654] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.743275] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.743904] kasan_report+0xbe/0xf0 [ 30.744383] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.745005] vma_interval_tree_remove+0xc75/0xec0 [ 30.745620] vma_prepare+0xc54/0x11a0 [ 30.746110] __split_vma+0x5af/0x950 [ 30.746621] ? __pfx___split_vma+0x10/0x10 [ 30.747152] ? find_held_lock+0x2c/0x110 [ 30.747678] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.748249] ? lock_is_held_type+0x9f/0x120 [ 30.748806] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.749418] ? mtree_range_walk+0x632/0x900 [ 30.749974] ? mas_walk+0x5c7/0x7c0 [ 30.750466] do_vmi_munmap+0x1f1/0x2b0 [ 30.750994] mmap_region+0x1f9/0x2660 [ 30.751486] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.752008] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.752752] ? __pfx_lock_acquire+0x10/0x10 [ 30.753281] ? __pfx_mmap_region+0x10/0x10 [ 30.753811] ? security_mmap_addr+0x7d/0xa0 [ 30.754340] ? get_unmapped_area+0x1f5/0x3f0 [ 30.754902] do_mmap+0x854/0xf00 [ 30.755341] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.755840] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.756406] ksys_mmap_pgoff+0x3af/0x500 [ 30.756920] do_syscall_64+0x3f/0x90 [ 30.757397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.758048] RIP: 0033:0x7f211391bd82 [ 30.758521] 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 [ 30.760681] RSP: 002b:00007ffd15a78358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.761592] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f211391bd82 [ 30.762450] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2112d55000 [ 30.763310] RBP: 00007f2112d55000 R08: 0000000000000009 R09: 0000000000001000 [ 30.764154] R10: 0000000000000812 R11: 0000000000000206 R12: 000056062be7ab20 [ 30.764994] R13: 00007ffd15a78370 R14: 00007ffd15a783a0 R15: 00007ffd15a78700 [ 30.765855] [ 30.766146] [ 30.766359] Allocated by task 213: [ 30.766804] kasan_save_stack+0x22/0x50 [ 30.767309] kasan_set_track+0x25/0x30 [ 30.767807] __kasan_slab_alloc+0x59/0x70 [ 30.768331] kmem_cache_alloc+0x16b/0x370 [ 30.768856] vm_area_dup+0x20/0x160 [ 30.769314] __split_vma+0x170/0x950 [ 30.769786] split_vma+0xc6/0x110 [ 30.770230] mprotect_fixup+0x8d2/0xb30 [ 30.770760] do_mprotect_pkey+0x87e/0xd40 [ 30.771282] __x64_sys_mprotect+0x78/0xc0 [ 30.771801] do_syscall_64+0x3f/0x90 [ 30.772281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.772925] [ 30.773140] Freed by task 213: [ 30.773539] kasan_save_stack+0x22/0x50 [ 30.774052] kasan_set_track+0x25/0x30 [ 30.774553] kasan_save_free_info+0x2b/0x50 [ 30.775092] __kasan_slab_free+0x10a/0x190 [ 30.775625] kmem_cache_free+0x10d/0x4d0 [ 30.776136] rcu_core+0x8c8/0x2860 [ 30.776586] __do_softirq+0x1b7/0x7d4 [ 30.777061] [ 30.777279] Last potentially related work creation: [ 30.777886] kasan_save_stack+0x22/0x50 [ 30.778386] __kasan_record_aux_stack+0x8e/0xa0 [ 30.778984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.779637] remove_vma+0x139/0x170 [ 30.780098] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.780661] do_vmi_munmap+0x1f1/0x2b0 [ 30.781155] __vm_munmap+0x138/0x3a0 [ 30.781623] __x64_sys_munmap+0x59/0x80 [ 30.782119] do_syscall_64+0x3f/0x90 [ 30.782605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783249] [ 30.783463] The buggy address belongs to the object at ffff888016cb7488 [ 30.783463] which belongs to the cache vm_area_struct of size 168 [ 30.784957] The buggy address is located 88 bytes inside of [ 30.784957] freed 168-byte region [ffff888016cb7488, ffff888016cb7530) [ 30.786379] [ 30.786603] The buggy address belongs to the physical page: [ 30.787262] page:000000004349c663 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cb7 [ 30.788374] memcg:ffff8880168c7d01 [ 30.788803] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.789450] page_type: 0xffffffff() [ 30.789910] raw: 0100000000000200 ffff8880087a0c80 ffffea00004089c0 dead000000000006 [ 30.790848] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168c7d01 [ 30.791766] page dumped because: kasan: bad access detected [ 30.792439] [ 30.792656] Memory state around the buggy address: [ 30.793234] ffff888016cb7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.794124] ffff888016cb7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.794991] >ffff888016cb7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.795844] ^ [ 30.796611] ffff888016cb7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.797469] ffff888016cb7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.798325] ================================================================== [ 30.799314] Disabling lock debugging due to kernel taint [ 33.173515] BUG: Bad rss-counter state mm:00000000af75b3b8 type:MM_FILEPAGES val:33 [ 33.174695] BUG: Bad rss-counter state mm:00000000af75b3b8 type:MM_ANONPAGES val:22 [ 33.646113] BUG: Bad rss-counter state mm:00000000dd1ab17c type:MM_FILEPAGES val:33 [ 33.647296] BUG: Bad rss-counter state mm:00000000dd1ab17c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18165' (ECDSA) to the list of known hosts. 2023/06/21 03:52:12 fuzzer started 2023/06/21 03:52:13 dialing manager at localhost:36067 2023/06/21 03:52:13 checking machine... 2023/06/21 03:52:13 checking revisions... [ 34.277474] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:52:13 testing simple program... [ 34.336461] cgroup: Unknown subsys name 'net' [ 34.388670] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:52:12 Registers: info registers vcpu 0 RAX=ffffffff86138eb5 RBX=0000000000000002 RCX=ffffffff86138eb0 RDX=0000000000000002 RSI=0000000000000005 RDI=ffffffff85dfe034 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86138eb0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a7e RFL=00000202 [-------] 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 00007fe3410f2900 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=00007fe3416a7650 CR3=0000000014758000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f9532b36a50 CR3=000000000ed86000 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=bab5525f788241965b4df1c2e8d0ead7 XMM02=000000000011d2d0ec2efd57dc4c00df XMM03=000000000012199894b4502ea14e92c3 XMM04=d15d5357122a465a00000000000ae988 XMM05=19e9129bd510f2350000000000131770 XMM06=dfe7e9d8143b039000000000001305d8 XMM07=e042d86d42eb936e0000000000121c18 XMM08=94b4502ea14e92c3000000000011d330 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000