syzkaller login: [ 39.642175] BUG: Bad rss-counter state mm:00000000f0c27329 type:MM_FILEPAGES val:33 [ 39.643210] BUG: Bad rss-counter state mm:00000000f0c27329 type:MM_ANONPAGES val:22 [ 39.821953] ================================================================== [ 39.822992] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.824134] Read of size 8 at addr ffff88800da945c8 by task sshd/220 [ 39.825056] [ 39.825309] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.826320] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.827420] Call Trace: [ 39.827783] [ 39.828107] dump_stack_lvl+0x91/0xf0 [ 39.828663] print_report+0xcc/0x620 [ 39.829230] ? __virt_addr_valid+0x102/0x340 [ 39.829862] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.830572] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.831300] kasan_report+0xbe/0xf0 [ 39.831861] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.832597] vma_interval_tree_remove+0xc75/0xec0 [ 39.833329] vma_prepare+0xc54/0x11a0 [ 39.833897] __split_vma+0x5af/0x950 [ 39.834463] ? __pfx___split_vma+0x10/0x10 [ 39.835091] ? find_held_lock+0x2c/0x110 [ 39.835706] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.836383] ? lock_is_held_type+0x9f/0x120 [ 39.837046] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.837769] ? mtree_range_walk+0x632/0x900 [ 39.838429] ? mas_walk+0x5c7/0x7c0 [ 39.838992] do_vmi_munmap+0x1f1/0x2b0 [ 39.839581] mmap_region+0x1f9/0x2660 [ 39.840157] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.840763] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.841622] ? __pfx_lock_acquire+0x10/0x10 [ 39.842259] ? __pfx_mmap_region+0x10/0x10 [ 39.842886] ? security_mmap_addr+0x7d/0xa0 [ 39.843512] ? get_unmapped_area+0x1f5/0x3f0 [ 39.844166] do_mmap+0x854/0xf00 [ 39.844688] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.845297] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.845968] ksys_mmap_pgoff+0x3af/0x500 [ 39.846573] do_syscall_64+0x3f/0x90 [ 39.847140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.847920] RIP: 0033:0x7f0bcbf35d82 [ 39.848460] 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 [ 39.851040] RSP: 002b:00007ffe2a3236d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.852114] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0bcbf35d82 [ 39.853130] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0bcb36f000 [ 39.854111] RBP: 00007f0bcb36f000 R08: 0000000000000009 R09: 0000000000001000 [ 39.855100] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557082c44f70 [ 39.856114] R13: 00007ffe2a3236f0 R14: 00007ffe2a323720 R15: 00007ffe2a323a80 [ 39.857115] [ 39.857449] [ 39.857701] Allocated by task 213: [ 39.858202] kasan_save_stack+0x22/0x50 [ 39.858782] kasan_set_track+0x25/0x30 [ 39.859356] __kasan_slab_alloc+0x59/0x70 [ 39.859963] kmem_cache_alloc+0x16b/0x370 [ 39.860557] vm_area_dup+0x20/0x160 [ 39.861099] __split_vma+0x170/0x950 [ 39.861632] split_vma+0xc6/0x110 [ 39.862137] mprotect_fixup+0x8d2/0xb30 [ 39.862716] do_mprotect_pkey+0x87e/0xd40 [ 39.863314] __x64_sys_mprotect+0x78/0xc0 [ 39.863912] do_syscall_64+0x3f/0x90 [ 39.864478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.865264] [ 39.865525] Freed by task 19: [ 39.865985] kasan_save_stack+0x22/0x50 [ 39.866576] kasan_set_track+0x25/0x30 [ 39.867144] kasan_save_free_info+0x2b/0x50 [ 39.867760] __kasan_slab_free+0x10a/0x190 [ 39.868375] kmem_cache_free+0x10d/0x4d0 [ 39.868966] rcu_core+0x8c8/0x2860 [ 39.869489] __do_softirq+0x1b7/0x7d4 [ 39.870046] [ 39.870302] Last potentially related work creation: [ 39.870995] kasan_save_stack+0x22/0x50 [ 39.871586] __kasan_record_aux_stack+0x8e/0xa0 [ 39.872264] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.873094] remove_vma+0x139/0x170 [ 39.873641] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.874321] do_vmi_munmap+0x1f1/0x2b0 [ 39.874920] __vm_munmap+0x138/0x3a0 [ 39.875421] __x64_sys_munmap+0x59/0x80 [ 39.875921] do_syscall_64+0x3f/0x90 [ 39.876401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.877058] [ 39.877278] Second to last potentially related work creation: [ 39.877961] kasan_save_stack+0x22/0x50 [ 39.878469] __kasan_record_aux_stack+0x8e/0xa0 [ 39.879039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.879685] remove_vma+0x139/0x170 [ 39.880141] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.880703] do_vmi_munmap+0x1f1/0x2b0 [ 39.881196] mmap_region+0x1f9/0x2660 [ 39.881672] do_mmap+0x854/0xf00 [ 39.882105] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.882595] ksys_mmap_pgoff+0x3af/0x500 [ 39.883102] do_syscall_64+0x3f/0x90 [ 39.883580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.884228] [ 39.884449] The buggy address belongs to the object at ffff88800da94570 [ 39.884449] which belongs to the cache vm_area_struct of size 168 [ 39.885936] The buggy address is located 88 bytes inside of [ 39.885936] freed 168-byte region [ffff88800da94570, ffff88800da94618) [ 39.887346] [ 39.887566] The buggy address belongs to the physical page: [ 39.888223] page:00000000776513e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda94 [ 39.889322] memcg:ffff88800ce77e01 [ 39.889753] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.890464] page_type: 0xffffffff() [ 39.890913] raw: 0100000000000200 ffff88800879fc80 ffffea000060cf00 dead000000000007 [ 39.891842] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce77e01 [ 39.892746] page dumped because: kasan: bad access detected [ 39.893424] [ 39.893640] Memory state around the buggy address: [ 39.894218] ffff88800da94480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.895086] ffff88800da94500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 39.895945] >ffff88800da94580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.896786] ^ [ 39.897457] ffff88800da94600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.898315] ffff88800da94680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.899165] ================================================================== [ 39.900172] Disabling lock debugging due to kernel taint [ 41.811122] BUG: Bad rss-counter state mm:000000008532c7d9 type:MM_FILEPAGES val:33 [ 41.812201] BUG: Bad rss-counter state mm:000000008532c7d9 type:MM_ANONPAGES val:22 [ 42.338654] BUG: Bad rss-counter state mm:000000001853c136 type:MM_FILEPAGES val:33 [ 42.339197] BUG: Bad rss-counter state mm:000000001853c136 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10206' (ECDSA) to the list of known hosts. 2023/06/19 18:09:07 fuzzer started 2023/06/19 18:09:07 dialing manager at localhost:44161 2023/06/19 18:09:07 checking machine... 2023/06/19 18:09:07 checking revisions... [ 43.033162] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:09:08 testing simple program... [ 43.076806] cgroup: Unknown subsys name 'net' [ 43.136924] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:09:06 Registers: info registers vcpu 0 RAX=ffffffff8180c585 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff1100d9c135e RSI=ffffffff8180c585 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff8613751e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888010259b40 R15=ffff88800ec6d540 RIP=ffffffff813ad424 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 0000000000000000 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=00007f0cbb84e940 CR3=000000000cba6000 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=756e696c2d34365f3638782f62696c2f XMM01=312e6f732e747262696c2f756e672d78 XMM02=00312e6f732e747262696c2f756e672d XMM03=78756e696c2d34365f3638782f62696c XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880192c8338 RCX=ffffffff812e00e5 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88800fd8f8d8 RBP=1ffff11001fb1f1b RSP=ffff88800fd8f890 R8 =0000000000000001 R9 =1ffff11001fb1f1b R10=ffff88800fd8f8db R11=0000000000000000 R12=ffff8880192c8340 R13=ffff8880192c8348 R14=ffff8880192c8448 R15=ffff88800fd8f9b0 RIP=ffffffff8180ef11 RFL=00000216 [----AP-] 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=00007f122525c328 CR3=00000000166fc000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000