syzkaller login: [ 43.766144] BUG: Bad rss-counter state mm:000000002ee7e580 type:MM_FILEPAGES val:33 [ 43.767734] BUG: Bad rss-counter state mm:000000002ee7e580 type:MM_ANONPAGES val:22 [ 43.930725] ================================================================== [ 43.931604] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.932536] Read of size 8 at addr ffff88801a2b46b0 by task sshd/221 [ 43.933388] [ 43.933606] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.934455] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.935431] Call Trace: [ 43.935747] [ 43.936031] dump_stack_lvl+0x91/0xf0 [ 43.936510] print_report+0xcc/0x620 [ 43.936987] ? __virt_addr_valid+0x102/0x340 [ 43.937558] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.938177] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.938786] kasan_report+0xbe/0xf0 [ 43.939265] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.939888] vma_interval_tree_remove+0xc75/0xec0 [ 43.940485] vma_prepare+0xc54/0x11a0 [ 43.940964] __split_vma+0x5af/0x950 [ 43.941446] ? __pfx___split_vma+0x10/0x10 [ 43.941973] ? find_held_lock+0x2c/0x110 [ 43.942492] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.943063] ? lock_is_held_type+0x9f/0x120 [ 43.943599] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.944205] ? mtree_range_walk+0x632/0x900 [ 43.944754] ? mas_walk+0x5c7/0x7c0 [ 43.945225] do_vmi_munmap+0x1f1/0x2b0 [ 43.945727] mmap_region+0x1f9/0x2660 [ 43.946211] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.946723] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.947441] ? __pfx_lock_acquire+0x10/0x10 [ 43.947975] ? __pfx_mmap_region+0x10/0x10 [ 43.948501] ? security_mmap_addr+0x7d/0xa0 [ 43.949036] ? get_unmapped_area+0x1f5/0x3f0 [ 43.949601] do_mmap+0x854/0xf00 [ 43.950037] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.950527] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.951083] ksys_mmap_pgoff+0x3af/0x500 [ 43.951585] do_syscall_64+0x3f/0x90 [ 43.952068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.952717] RIP: 0033:0x7fd389433d82 [ 43.953173] 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 [ 43.955275] RSP: 002b:00007ffed62d0e78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.956179] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd389433d82 [ 43.957007] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd38886d000 [ 43.957855] RBP: 00007fd38886d000 R08: 0000000000000009 R09: 0000000000001000 [ 43.958695] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ef9dcbf70 [ 43.959545] R13: 00007ffed62d0e90 R14: 00007ffed62d0ec0 R15: 00007ffed62d1220 [ 43.960395] [ 43.960688] [ 43.960901] Allocated by task 214: [ 43.961321] kasan_save_stack+0x22/0x50 [ 43.961850] kasan_set_track+0x25/0x30 [ 43.962347] __kasan_slab_alloc+0x59/0x70 [ 43.962874] kmem_cache_alloc+0x16b/0x370 [ 43.963389] vm_area_dup+0x20/0x160 [ 43.963846] __split_vma+0x170/0x950 [ 43.964309] split_vma+0xc6/0x110 [ 43.964749] mprotect_fixup+0x8d2/0xb30 [ 43.965250] do_mprotect_pkey+0x87e/0xd40 [ 43.965776] __x64_sys_mprotect+0x78/0xc0 [ 43.966288] do_syscall_64+0x3f/0x90 [ 43.966764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.967403] [ 43.967618] Freed by task 214: [ 43.968015] kasan_save_stack+0x22/0x50 [ 43.968508] kasan_set_track+0x25/0x30 [ 43.968997] kasan_save_free_info+0x2b/0x50 [ 43.969540] __kasan_slab_free+0x10a/0x190 [ 43.970069] kmem_cache_free+0x10d/0x4d0 [ 43.970573] rcu_core+0x8c8/0x2860 [ 43.971024] __do_softirq+0x1b7/0x7d4 [ 43.971496] [ 43.971711] Last potentially related work creation: [ 43.972300] kasan_save_stack+0x22/0x50 [ 43.972796] __kasan_record_aux_stack+0x8e/0xa0 [ 43.973373] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.974027] remove_vma+0x139/0x170 [ 43.974476] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.975033] do_vmi_munmap+0x1f1/0x2b0 [ 43.975514] __vm_munmap+0x138/0x3a0 [ 43.975985] __x64_sys_munmap+0x59/0x80 [ 43.976474] do_syscall_64+0x3f/0x90 [ 43.976949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.977591] [ 43.977809] The buggy address belongs to the object at ffff88801a2b4658 [ 43.977809] which belongs to the cache vm_area_struct of size 168 [ 43.979277] The buggy address is located 88 bytes inside of [ 43.979277] freed 168-byte region [ffff88801a2b4658, ffff88801a2b4700) [ 43.980665] [ 43.980882] The buggy address belongs to the physical page: [ 43.981561] page:00000000c538e6ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2b4 [ 43.982654] memcg:ffff88800abb8c01 [ 43.983086] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.983730] page_type: 0xffffffff() [ 43.984184] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.985109] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800abb8c01 [ 43.986015] page dumped because: kasan: bad access detected [ 43.986670] [ 43.986887] Memory state around the buggy address: [ 43.987465] ffff88801a2b4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.988320] ffff88801a2b4600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 43.989175] >ffff88801a2b4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.990029] ^ [ 43.990608] ffff88801a2b4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 43.991464] ffff88801a2b4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 43.992310] ================================================================== [ 43.993393] Disabling lock debugging due to kernel taint [ 46.277170] BUG: Bad rss-counter state mm:00000000b0ccca14 type:MM_FILEPAGES val:33 [ 46.278364] BUG: Bad rss-counter state mm:00000000b0ccca14 type:MM_ANONPAGES val:22 [ 46.709896] BUG: Bad rss-counter state mm:0000000060b8f950 type:MM_FILEPAGES val:33 [ 46.710862] BUG: Bad rss-counter state mm:0000000060b8f950 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21345' (ECDSA) to the list of known hosts. 2023/06/19 23:05:12 fuzzer started 2023/06/19 23:05:13 dialing manager at localhost:44161 2023/06/19 23:05:13 checking machine... 2023/06/19 23:05:13 checking revisions... [ 47.487242] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:05:13 testing simple program... [ 47.538905] cgroup: Unknown subsys name 'net' [ 47.585043] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:04:59 Registers: info registers vcpu 0 RAX=ffffffff818c84d4 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110039c5f19 RSI=ffffffff818c84d4 RDI=ffff88801ce2f938 RBP=ffff88801ce2f908 RSP=ffff88801ce2f868 R8 =0000000000000001 R9 =ffff88801ce2f8b0 R10=0000000000038001 R11=00000000000246ba R12=ffff88801ce2f938 R13=0000000000000000 R14=ffff88800daf0000 R15=ffff8880192057d8 RIP=ffffffff84532440 RFL=00000286 [--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 00007f79c3585900 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=00007ffe749cf000 CR3=0000000018466000 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=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=00000000000101f1 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff888009ed81a0 RSP=ffff88801a0bf7a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f1 R11=0000000000000128 R12=00000000000101f1 R13=ffff888009ed8050 R14=ffff888009ed8048 R15=ffff888009ed81a9 RIP=ffffffff821927de RFL=00000093 [--S-A-C] 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 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=00007ffc058de588 CR3=000000000f4e8000 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=2032313a35303a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a35303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000