syzkaller login: [ 40.652232] BUG: Bad rss-counter state mm:000000002ac9d0b7 type:MM_FILEPAGES val:33 [ 40.653494] BUG: Bad rss-counter state mm:000000002ac9d0b7 type:MM_ANONPAGES val:22 [ 40.815724] ================================================================== [ 40.816643] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.817585] Read of size 8 at addr ffff88800ea96228 by task sshd/219 [ 40.818360] [ 40.818582] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.819552] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.820520] Call Trace: [ 40.820866] [ 40.821152] dump_stack_lvl+0x91/0xf0 [ 40.821639] print_report+0xcc/0x620 [ 40.822128] ? __virt_addr_valid+0x102/0x340 [ 40.822686] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.823312] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.823934] kasan_report+0xbe/0xf0 [ 40.824412] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.825044] vma_interval_tree_remove+0xc75/0xec0 [ 40.825657] vma_prepare+0xc54/0x11a0 [ 40.826193] __split_vma+0x5af/0x950 [ 40.826712] ? __pfx___split_vma+0x10/0x10 [ 40.827284] ? find_held_lock+0x2c/0x110 [ 40.827844] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.828464] ? lock_is_held_type+0x9f/0x120 [ 40.829034] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.829713] ? mtree_range_walk+0x632/0x900 [ 40.830319] ? mas_walk+0x5c7/0x7c0 [ 40.830846] do_vmi_munmap+0x1f1/0x2b0 [ 40.831391] mmap_region+0x1f9/0x2660 [ 40.831891] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.832418] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.833159] ? __pfx_lock_acquire+0x10/0x10 [ 40.833688] ? __pfx_mmap_region+0x10/0x10 [ 40.834207] ? security_mmap_addr+0x7d/0xa0 [ 40.834739] ? get_unmapped_area+0x1f5/0x3f0 [ 40.835282] do_mmap+0x854/0xf00 [ 40.835719] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.836214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.836779] ksys_mmap_pgoff+0x3af/0x500 [ 40.837286] do_syscall_64+0x3f/0x90 [ 40.837778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.838423] RIP: 0033:0x7fa8c51c9d82 [ 40.838889] 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 [ 40.841066] RSP: 002b:00007ffedf62a6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.841975] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8c51c9d82 [ 40.842824] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8c4603000 [ 40.843681] RBP: 00007fa8c4603000 R08: 0000000000000009 R09: 0000000000001000 [ 40.844522] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a84e97bec0 [ 40.845379] R13: 00007ffedf62a6e0 R14: 00007ffedf62a710 R15: 00007ffedf62aa70 [ 40.846247] [ 40.846537] [ 40.846755] Allocated by task 212: [ 40.847187] kasan_save_stack+0x22/0x50 [ 40.847701] kasan_set_track+0x25/0x30 [ 40.848198] __kasan_slab_alloc+0x59/0x70 [ 40.848740] kmem_cache_alloc+0x16b/0x370 [ 40.849253] vm_area_dup+0x20/0x160 [ 40.849705] __split_vma+0x170/0x950 [ 40.850172] split_vma+0xc6/0x110 [ 40.850614] mprotect_fixup+0x8d2/0xb30 [ 40.851119] do_mprotect_pkey+0x87e/0xd40 [ 40.851643] __x64_sys_mprotect+0x78/0xc0 [ 40.852161] do_syscall_64+0x3f/0x90 [ 40.852651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.853288] [ 40.853506] Freed by task 19: [ 40.853894] kasan_save_stack+0x22/0x50 [ 40.854396] kasan_set_track+0x25/0x30 [ 40.854894] kasan_save_free_info+0x2b/0x50 [ 40.855444] __kasan_slab_free+0x10a/0x190 [ 40.855969] kmem_cache_free+0x10d/0x4d0 [ 40.856476] rcu_core+0x8c8/0x2860 [ 40.856931] __do_softirq+0x1b7/0x7d4 [ 40.857409] [ 40.857621] Last potentially related work creation: [ 40.858199] kasan_save_stack+0x22/0x50 [ 40.858703] __kasan_record_aux_stack+0x8e/0xa0 [ 40.859277] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.859914] remove_vma+0x139/0x170 [ 40.860369] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.860945] do_vmi_munmap+0x1f1/0x2b0 [ 40.861428] __vm_munmap+0x138/0x3a0 [ 40.861895] __x64_sys_munmap+0x59/0x80 [ 40.862387] do_syscall_64+0x3f/0x90 [ 40.862866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.863497] [ 40.863713] The buggy address belongs to the object at ffff88800ea961d0 [ 40.863713] which belongs to the cache vm_area_struct of size 168 [ 40.865167] The buggy address is located 88 bytes inside of [ 40.865167] freed 168-byte region [ffff88800ea961d0, ffff88800ea96278) [ 40.866553] [ 40.866766] The buggy address belongs to the physical page: [ 40.867418] page:000000006fecba69 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea96 [ 40.868489] memcg:ffff88800d254301 [ 40.868917] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.869563] page_type: 0xffffffff() [ 40.870017] raw: 0100000000000200 ffff88800879fc80 ffffea000036eb00 dead000000000006 [ 40.870940] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d254301 [ 40.871846] page dumped because: kasan: bad access detected [ 40.872512] [ 40.872744] Memory state around the buggy address: [ 40.873324] ffff88800ea96100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.874176] ffff88800ea96180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.875023] >ffff88800ea96200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.875874] ^ [ 40.876435] ffff88800ea96280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.877305] ffff88800ea96300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.878152] ================================================================== [ 40.879221] Disabling lock debugging due to kernel taint [ 42.824019] BUG: Bad rss-counter state mm:000000002f093614 type:MM_FILEPAGES val:33 [ 42.825051] BUG: Bad rss-counter state mm:000000002f093614 type:MM_ANONPAGES val:22 [ 43.372663] BUG: Bad rss-counter state mm:00000000e1a0de86 type:MM_FILEPAGES val:33 [ 43.373817] BUG: Bad rss-counter state mm:00000000e1a0de86 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42027' (ECDSA) to the list of known hosts. 2023/06/19 21:05:36 fuzzer started 2023/06/19 21:05:36 dialing manager at localhost:44161 2023/06/19 21:05:36 checking machine... 2023/06/19 21:05:36 checking revisions... [ 44.051124] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:05:37 testing simple program... [ 44.096517] cgroup: Unknown subsys name 'net' [ 44.205844] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:05:34 Registers: info registers vcpu 0 RAX=ffffffff83640961 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11000d24ed2 RSI=ffffffff83640961 RDI=ffff888006927700 RBP=ffff8880069276d0 RSP=ffff888006927630 R8 =0000000000000001 R9 =ffff888006927678 R10=0000000000038001 R11=000000000008aa86 R12=ffff888006927700 R13=0000000000000000 R14=ffff88800e578000 R15=ffff8880165fe000 RIP=ffffffff84532440 RFL=00000282 [--S----] 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 00007fe144e8c900 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=00007ffe32483000 CR3=000000001a524000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007fec810606e0 CR3=000000000c72c000 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=c84f71f72dca2d977c4d6f3ad0e54ec2 XMM02=00000000001204b8ec2efd57dc4c00df XMM03=00000000001257f07356b6e8187bdbc2 XMM04=bc2eda05591f0db400000000000ae988 XMM05=4b68b45a484602b80000000000135880 XMM06=806171799158d9670000000000134f08 XMM07=e042d86d42eb936e0000000000126230 XMM08=7356b6e8187bdbc20000000000120518 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000