syzkaller login: [ 31.371907] BUG: Bad rss-counter state mm:00000000ec37dfd2 type:MM_FILEPAGES val:33 [ 31.373494] BUG: Bad rss-counter state mm:00000000ec37dfd2 type:MM_ANONPAGES val:22 [ 31.419753] ================================================================== [ 31.420966] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.421962] Read of size 8 at addr ffff88800e793b38 by task sshd/219 [ 31.422834] [ 31.423086] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.424045] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.425157] Call Trace: [ 31.425506] [ 31.425840] dump_stack_lvl+0x91/0xf0 [ 31.426409] print_report+0xcc/0x620 [ 31.426977] ? __virt_addr_valid+0x102/0x340 [ 31.427559] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.428236] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.428952] kasan_report+0xbe/0xf0 [ 31.429439] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.430159] vma_interval_tree_remove+0xc75/0xec0 [ 31.430898] vma_prepare+0xc54/0x11a0 [ 31.431483] __split_vma+0x5af/0x950 [ 31.432097] ? __pfx___split_vma+0x10/0x10 [ 31.432599] ? find_held_lock+0x2c/0x110 [ 31.433094] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.433630] ? lock_is_held_type+0x9f/0x120 [ 31.434137] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.434737] ? mtree_range_walk+0x632/0x900 [ 31.435267] ? mas_walk+0x5c7/0x7c0 [ 31.435729] do_vmi_munmap+0x1f1/0x2b0 [ 31.436209] mmap_region+0x1f9/0x2660 [ 31.436664] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.437156] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.437829] ? __pfx_lock_acquire+0x10/0x10 [ 31.438329] ? __pfx_mmap_region+0x10/0x10 [ 31.438826] ? security_mmap_addr+0x7d/0xa0 [ 31.439333] ? get_unmapped_area+0x1f5/0x3f0 [ 31.439847] do_mmap+0x854/0xf00 [ 31.440321] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.440850] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.441533] ksys_mmap_pgoff+0x3af/0x500 [ 31.442033] do_syscall_64+0x3f/0x90 [ 31.442505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.443138] RIP: 0033:0x7ff401c94d82 [ 31.443594] 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 [ 31.445683] RSP: 002b:00007ffde42b9388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.446575] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff401c94d82 [ 31.447407] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4010ce000 [ 31.448247] RBP: 00007ff4010ce000 R08: 0000000000000009 R09: 0000000000001000 [ 31.449076] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564887411f60 [ 31.449899] R13: 00007ffde42b93a0 R14: 00007ffde42b93d0 R15: 00007ffde42b9730 [ 31.450729] [ 31.451013] [ 31.451221] Allocated by task 212: [ 31.451631] kasan_save_stack+0x22/0x50 [ 31.452140] kasan_set_track+0x25/0x30 [ 31.452617] __kasan_slab_alloc+0x59/0x70 [ 31.453130] kmem_cache_alloc+0x16b/0x370 [ 31.453638] vm_area_dup+0x20/0x160 [ 31.454077] __split_vma+0x170/0x950 [ 31.454522] split_vma+0xc6/0x110 [ 31.454945] mprotect_fixup+0x8d2/0xb30 [ 31.455420] do_mprotect_pkey+0x87e/0xd40 [ 31.455928] __x64_sys_mprotect+0x78/0xc0 [ 31.456432] do_syscall_64+0x3f/0x90 [ 31.456885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.457507] [ 31.457714] Freed by task 212: [ 31.458096] kasan_save_stack+0x22/0x50 [ 31.458583] kasan_set_track+0x25/0x30 [ 31.459066] kasan_save_free_info+0x2b/0x50 [ 31.459577] __kasan_slab_free+0x10a/0x190 [ 31.460108] kmem_cache_free+0x10d/0x4d0 [ 31.460603] rcu_core+0x8c8/0x2860 [ 31.461030] __do_softirq+0x1b7/0x7d4 [ 31.461485] [ 31.461688] Last potentially related work creation: [ 31.462248] kasan_save_stack+0x22/0x50 [ 31.462747] __kasan_record_aux_stack+0x8e/0xa0 [ 31.463294] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.463920] remove_vma+0x139/0x170 [ 31.464366] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.464891] do_vmi_munmap+0x1f1/0x2b0 [ 31.465348] __vm_munmap+0x138/0x3a0 [ 31.465789] __x64_sys_munmap+0x59/0x80 [ 31.466258] do_syscall_64+0x3f/0x90 [ 31.466703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.467298] [ 31.467503] The buggy address belongs to the object at ffff88800e793ae0 [ 31.467503] which belongs to the cache vm_area_struct of size 168 [ 31.468888] The buggy address is located 88 bytes inside of [ 31.468888] freed 168-byte region [ffff88800e793ae0, ffff88800e793b88) [ 31.470203] [ 31.470410] The buggy address belongs to the physical page: [ 31.471020] page:00000000b2b75c15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe793 [ 31.472037] memcg:ffff88800e824401 [ 31.472435] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.473038] page_type: 0xffffffff() [ 31.473458] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.474309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e824401 [ 31.475144] page dumped because: kasan: bad access detected [ 31.475760] [ 31.475962] Memory state around the buggy address: [ 31.476526] ffff88800e793a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.477324] ffff88800e793a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.478123] >ffff88800e793b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.478916] ^ [ 31.479487] ffff88800e793b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.480305] ffff88800e793c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.481097] ================================================================== [ 31.482262] Disabling lock debugging due to kernel taint [ 33.750420] BUG: Bad rss-counter state mm:000000003eda3ce1 type:MM_FILEPAGES val:33 [ 33.751377] BUG: Bad rss-counter state mm:000000003eda3ce1 type:MM_ANONPAGES val:22 [ 34.320351] BUG: Bad rss-counter state mm:0000000088af6219 type:MM_FILEPAGES val:33 [ 34.321470] BUG: Bad rss-counter state mm:0000000088af6219 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34852' (ECDSA) to the list of known hosts. 2023/06/20 06:20:00 fuzzer started 2023/06/20 06:20:00 dialing manager at localhost:44161 2023/06/20 06:20:00 checking machine... 2023/06/20 06:20:00 checking revisions... [ 35.006761] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:20:01 testing simple program... [ 35.058282] cgroup: Unknown subsys name 'net' [ 35.097159] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:20:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fd7b637d7f0 CR3=000000000c63c000 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=222bed47f079bc88a544cd528cda37cd XMM02=000000000011c830ec2efd57dc4c00df XMM03=00000000001240d8c03d3525e310ed6a XMM04=dda6e1f055ea2eb900000000000ae988 XMM05=19e9129bd510f2350000000000133c38 XMM06=4fda316b135da52b0000000000133ac0 XMM07=e042d86d42eb936e0000000000124358 XMM08=c03d3525e310ed6a000000000011c890 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000100 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=ffff888019d6d1c0 RSI=0000000000000100 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806cf09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88801a361170 RIP=ffffffff814c07eb RFL=00000246 [---Z-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 00007fe3e8c96900 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=00007ffd32e8b000 CR3=0000000015bae000 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=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