syzkaller login: [ 33.778091] BUG: Bad rss-counter state mm:0000000017ebba84 type:MM_FILEPAGES val:33 [ 33.779102] BUG: Bad rss-counter state mm:0000000017ebba84 type:MM_ANONPAGES val:22 [ 33.814380] ================================================================== [ 33.815455] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.816580] Read of size 8 at addr ffff88800e641ed8 by task sshd/220 [ 33.817504] [ 33.817823] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.818805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.819922] Call Trace: [ 33.820266] [ 33.820609] dump_stack_lvl+0x91/0xf0 [ 33.821175] print_report+0xcc/0x620 [ 33.821718] ? __virt_addr_valid+0x102/0x340 [ 33.822298] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.822956] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.823601] kasan_report+0xbe/0xf0 [ 33.824136] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.824781] vma_interval_tree_remove+0xc75/0xec0 [ 33.825388] vma_prepare+0xc54/0x11a0 [ 33.825880] __split_vma+0x5af/0x950 [ 33.826356] ? __pfx___split_vma+0x10/0x10 [ 33.826889] ? find_held_lock+0x2c/0x110 [ 33.827411] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.827975] ? lock_is_held_type+0x9f/0x120 [ 33.828513] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.829138] ? mtree_range_walk+0x632/0x900 [ 33.829713] ? mas_walk+0x5c7/0x7c0 [ 33.830191] do_vmi_munmap+0x1f1/0x2b0 [ 33.830688] mmap_region+0x1f9/0x2660 [ 33.831169] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.831690] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.832408] ? __pfx_lock_acquire+0x10/0x10 [ 33.832941] ? __pfx_mmap_region+0x10/0x10 [ 33.833469] ? security_mmap_addr+0x7d/0xa0 [ 33.834009] ? get_unmapped_area+0x1f5/0x3f0 [ 33.834572] do_mmap+0x854/0xf00 [ 33.835016] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.835518] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.836077] ksys_mmap_pgoff+0x3af/0x500 [ 33.836585] do_syscall_64+0x3f/0x90 [ 33.837065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.837718] RIP: 0033:0x7f6130bbbd82 [ 33.838178] 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 [ 33.840309] RSP: 002b:00007ffdbc45f8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.841215] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6130bbbd82 [ 33.842083] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f612fff5000 [ 33.842931] RBP: 00007f612fff5000 R08: 0000000000000009 R09: 0000000000001000 [ 33.843783] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b13cd6fec0 [ 33.844628] R13: 00007ffdbc45f900 R14: 00007ffdbc45f930 R15: 00007ffdbc45fc90 [ 33.845493] [ 33.845804] [ 33.846018] Allocated by task 213: [ 33.846449] kasan_save_stack+0x22/0x50 [ 33.846958] kasan_set_track+0x25/0x30 [ 33.847451] __kasan_slab_alloc+0x59/0x70 [ 33.847978] kmem_cache_alloc+0x16b/0x370 [ 33.848501] vm_area_dup+0x20/0x160 [ 33.848961] __split_vma+0x170/0x950 [ 33.849431] split_vma+0xc6/0x110 [ 33.849878] mprotect_fixup+0x8d2/0xb30 [ 33.850389] do_mprotect_pkey+0x87e/0xd40 [ 33.850912] __x64_sys_mprotect+0x78/0xc0 [ 33.851436] do_syscall_64+0x3f/0x90 [ 33.851913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.852555] [ 33.852771] Freed by task 13: [ 33.853158] kasan_save_stack+0x22/0x50 [ 33.853680] kasan_set_track+0x25/0x30 [ 33.854178] kasan_save_free_info+0x2b/0x50 [ 33.854720] __kasan_slab_free+0x10a/0x190 [ 33.855256] kmem_cache_free+0x10d/0x4d0 [ 33.855767] rcu_core+0x8c8/0x2860 [ 33.856214] __do_softirq+0x1b7/0x7d4 [ 33.856689] [ 33.856907] Last potentially related work creation: [ 33.857497] kasan_save_stack+0x22/0x50 [ 33.858026] __kasan_record_aux_stack+0x8e/0xa0 [ 33.858609] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.859366] remove_vma+0x139/0x170 [ 33.859836] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.860403] do_vmi_munmap+0x1f1/0x2b0 [ 33.860894] __vm_munmap+0x138/0x3a0 [ 33.861365] __x64_sys_munmap+0x59/0x80 [ 33.861888] do_syscall_64+0x3f/0x90 [ 33.862375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.863036] [ 33.863255] The buggy address belongs to the object at ffff88800e641e80 [ 33.863255] which belongs to the cache vm_area_struct of size 168 [ 33.864769] The buggy address is located 88 bytes inside of [ 33.864769] freed 168-byte region [ffff88800e641e80, ffff88800e641f28) [ 33.866198] [ 33.866412] The buggy address belongs to the physical page: [ 33.867115] page:000000003227bef2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe641 [ 33.868277] memcg:ffff88800dc79001 [ 33.868725] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.869402] page_type: 0xffffffff() [ 33.869888] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.870876] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc79001 [ 33.871835] page dumped because: kasan: bad access detected [ 33.872534] [ 33.872758] Memory state around the buggy address: [ 33.873372] ffff88800e641d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.874311] ffff88800e641e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 33.875224] >ffff88800e641e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.876115] ^ [ 33.876893] ffff88800e641f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 33.877822] ffff88800e641f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.878707] ================================================================== [ 33.879732] Disabling lock debugging due to kernel taint [ 35.896080] BUG: Bad rss-counter state mm:0000000068b9e77b type:MM_FILEPAGES val:33 [ 35.897130] BUG: Bad rss-counter state mm:0000000068b9e77b type:MM_ANONPAGES val:22 [ 36.442157] BUG: Bad rss-counter state mm:00000000f8fcf7ae type:MM_FILEPAGES val:33 [ 36.443109] BUG: Bad rss-counter state mm:00000000f8fcf7ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42061' (ECDSA) to the list of known hosts. 2023/06/19 19:33:51 fuzzer started 2023/06/19 19:33:51 dialing manager at localhost:44161 2023/06/19 19:33:51 checking machine... 2023/06/19 19:33:51 checking revisions... [ 37.102912] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:33:51 testing simple program... [ 37.152246] cgroup: Unknown subsys name 'net' [ 37.195260] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:33:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800dcab140 RCX=0000000000000000 RDX=ffff88800ed18000 RSI=000000000000001d RDI=ffffffff854ee9e0 RBP=000000000000001d RSP=ffff888009b6f860 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000008 R11=656d616e74736f68 R12=0000000000000008 R13=ffff8880177dc000 R14=00000000000000f4 R15=0000000000000452 RIP=ffffffff8119ce94 RFL=00000293 [--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 00007f345e90f900 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=00007ffc3a6a0000 CR3=000000000e5f8000 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=00007fe4d41879e0 CR3=000000000cb2c000 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=4c316c4622de0e83374a9b5ba6c17a39 XMM02=00000000001212a8ec2efd57dc4c00df XMM03=0000000000126e5054426633ce8e8496 XMM04=2d137e2d6be377c200000000000ae988 XMM05=19e9129bd510f2350000000000136250 XMM06=f0fd6e4b493796d200000000001350b8 XMM07=e042d86d42eb936e00000000001270d0 XMM08=54426633ce8e84960000000000121308 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000