syzkaller login: [ 32.937841] BUG: Bad rss-counter state mm:00000000ea375a2d type:MM_FILEPAGES val:33 [ 32.938828] BUG: Bad rss-counter state mm:00000000ea375a2d type:MM_ANONPAGES val:22 [ 33.096283] ================================================================== [ 33.097196] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.098140] Read of size 8 at addr ffff88800d6bb4e0 by task sshd/222 [ 33.098905] [ 33.099128] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.100158] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.101139] Call Trace: [ 33.101455] [ 33.101747] dump_stack_lvl+0x91/0xf0 [ 33.102251] print_report+0xcc/0x620 [ 33.102747] ? __virt_addr_valid+0x102/0x340 [ 33.103328] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.103952] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.104564] kasan_report+0xbe/0xf0 [ 33.105037] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.105659] vma_interval_tree_remove+0xc75/0xec0 [ 33.106259] vma_prepare+0xc54/0x11a0 [ 33.106739] __split_vma+0x5af/0x950 [ 33.107212] ? __pfx___split_vma+0x10/0x10 [ 33.107749] ? find_held_lock+0x2c/0x110 [ 33.108266] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.108825] ? lock_is_held_type+0x9f/0x120 [ 33.109355] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.109959] ? mtree_range_walk+0x632/0x900 [ 33.110508] ? mas_walk+0x5c7/0x7c0 [ 33.110981] do_vmi_munmap+0x1f1/0x2b0 [ 33.111485] mmap_region+0x1f9/0x2660 [ 33.111967] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.112475] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.113180] ? __pfx_lock_acquire+0x10/0x10 [ 33.113706] ? __pfx_mmap_region+0x10/0x10 [ 33.114233] ? security_mmap_addr+0x7d/0xa0 [ 33.114761] ? get_unmapped_area+0x1f5/0x3f0 [ 33.115334] do_mmap+0x854/0xf00 [ 33.115773] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.116267] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.116829] ksys_mmap_pgoff+0x3af/0x500 [ 33.117336] do_syscall_64+0x3f/0x90 [ 33.117805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.118442] RIP: 0033:0x7fe0ebfd2d82 [ 33.118896] 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 [ 33.121000] RSP: 002b:00007ffe8ff0b048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.121893] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe0ebfd2d82 [ 33.122730] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe0eb40c000 [ 33.123595] RBP: 00007fe0eb40c000 R08: 0000000000000009 R09: 0000000000001000 [ 33.124427] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a4d041d90 [ 33.125274] R13: 00007ffe8ff0b060 R14: 00007ffe8ff0b090 R15: 00007ffe8ff0b3f0 [ 33.126117] [ 33.126414] [ 33.126626] Allocated by task 215: [ 33.127051] kasan_save_stack+0x22/0x50 [ 33.127559] kasan_set_track+0x25/0x30 [ 33.128052] __kasan_slab_alloc+0x59/0x70 [ 33.128569] kmem_cache_alloc+0x16b/0x370 [ 33.129080] vm_area_dup+0x20/0x160 [ 33.129530] __split_vma+0x170/0x950 [ 33.129994] split_vma+0xc6/0x110 [ 33.130431] mprotect_fixup+0x8d2/0xb30 [ 33.130925] do_mprotect_pkey+0x87e/0xd40 [ 33.131464] __x64_sys_mprotect+0x78/0xc0 [ 33.131995] do_syscall_64+0x3f/0x90 [ 33.132464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.133108] [ 33.133324] Freed by task 204: [ 33.133721] kasan_save_stack+0x22/0x50 [ 33.134221] kasan_set_track+0x25/0x30 [ 33.134718] kasan_save_free_info+0x2b/0x50 [ 33.135247] __kasan_slab_free+0x10a/0x190 [ 33.135780] kmem_cache_free+0x10d/0x4d0 [ 33.136282] rcu_core+0x8c8/0x2860 [ 33.136724] __do_softirq+0x1b7/0x7d4 [ 33.137193] [ 33.137405] Last potentially related work creation: [ 33.137986] kasan_save_stack+0x22/0x50 [ 33.138484] __kasan_record_aux_stack+0x8e/0xa0 [ 33.139057] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.139704] remove_vma+0x139/0x170 [ 33.140152] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.140778] do_vmi_munmap+0x1f1/0x2b0 [ 33.141267] __vm_munmap+0x138/0x3a0 [ 33.141733] __x64_sys_munmap+0x59/0x80 [ 33.142229] do_syscall_64+0x3f/0x90 [ 33.142693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.143347] [ 33.143559] The buggy address belongs to the object at ffff88800d6bb488 [ 33.143559] which belongs to the cache vm_area_struct of size 168 [ 33.145007] The buggy address is located 88 bytes inside of [ 33.145007] freed 168-byte region [ffff88800d6bb488, ffff88800d6bb530) [ 33.146409] [ 33.146624] The buggy address belongs to the physical page: [ 33.147282] page:000000000d712694 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6bb [ 33.148377] memcg:ffff8880195c1101 [ 33.148814] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.149465] page_type: 0xffffffff() [ 33.149923] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.150844] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880195c1101 [ 33.151756] page dumped because: kasan: bad access detected [ 33.152405] [ 33.152621] Memory state around the buggy address: [ 33.153196] ffff88800d6bb380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.154042] ffff88800d6bb400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.154899] >ffff88800d6bb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.155748] ^ [ 33.156507] ffff88800d6bb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.157368] ffff88800d6bb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.158220] ================================================================== [ 33.159171] Disabling lock debugging due to kernel taint [ 35.100436] BUG: Bad rss-counter state mm:0000000048057e0a type:MM_FILEPAGES val:33 [ 35.101415] BUG: Bad rss-counter state mm:0000000048057e0a type:MM_ANONPAGES val:22 [ 35.565468] BUG: Bad rss-counter state mm:000000002e64e4f4 type:MM_FILEPAGES val:33 [ 35.566479] BUG: Bad rss-counter state mm:000000002e64e4f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7577' (ECDSA) to the list of known hosts. 2023/06/19 23:10:36 fuzzer started 2023/06/19 23:10:36 dialing manager at localhost:44161 2023/06/19 23:10:36 checking machine... 2023/06/19 23:10:36 checking revisions... [ 36.262845] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:10:36 testing simple program... [ 36.321461] cgroup: Unknown subsys name 'net' [ 36.368075] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:10:34 Registers: info registers vcpu 0 RAX=ffffffff8451355d RBX=ffff88800c25e758 RCX=ffffffff812e00e5 RDX=1ffffffff0adb046 RSI=0000000000000004 RDI=ffff88806ce09d78 RBP=ffffffff856d8220 RSP=ffff88806ce09df0 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=0000000000000283 R13=ffffea0000309780 R14=ffffffff813782a8 R15=ffff88800d9e7b80 RIP=ffffffff8452fd43 RFL=00000086 [--S--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 00007f751e2cb900 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=00007f751e880650 CR3=000000000e31e000 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=1ffffffff0c82399 RBX=0000000000000001 RCX=ffffffff86411ccc RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888014797470 RSP=ffff8880147973a8 R8 =ffffffff86411cd0 R9 =ffff888014797458 R10=0000000000038001 R11=000000000009a980 R12=ffff888014797478 R13=ffff888014797460 R14=ffff8880147978f8 R15=ffff888014797418 RIP=ffffffff81130b73 RFL=00000217 [----APC] 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 00007f45031d0900 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=00007f45025d1fa0 CR3=000000000d538000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=7425ece1113f1cef00000000000ae988 XMM05=db3ae9b8ac3f9f460000000000134ba8 XMM06=00c3ffa147b8d8570000000000133998 XMM07=fb795ef6d65770560000000000123fa8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000