syzkaller login: [ 32.768503] BUG: Bad rss-counter state mm:00000000107d02a4 type:MM_FILEPAGES val:33 [ 32.769742] BUG: Bad rss-counter state mm:00000000107d02a4 type:MM_ANONPAGES val:22 [ 32.811627] ================================================================== [ 32.812733] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.813853] Read of size 8 at addr ffff8880159aec20 by task sshd/221 [ 32.814676] [ 32.814909] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.815847] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.816885] Call Trace: [ 32.817230] [ 32.817534] dump_stack_lvl+0x91/0xf0 [ 32.818054] print_report+0xcc/0x620 [ 32.818565] ? __virt_addr_valid+0x102/0x340 [ 32.819154] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.819814] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.820473] kasan_report+0xbe/0xf0 [ 32.820995] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.821658] vma_interval_tree_remove+0xc75/0xec0 [ 32.822304] vma_prepare+0xc54/0x11a0 [ 32.822811] __split_vma+0x5af/0x950 [ 32.823315] ? __pfx___split_vma+0x10/0x10 [ 32.823880] ? find_held_lock+0x2c/0x110 [ 32.824432] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.825052] ? lock_is_held_type+0x9f/0x120 [ 32.825624] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.826280] ? mtree_range_walk+0x632/0x900 [ 32.826871] ? mas_walk+0x5c7/0x7c0 [ 32.827373] do_vmi_munmap+0x1f1/0x2b0 [ 32.827898] mmap_region+0x1f9/0x2660 [ 32.828412] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.828967] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.829729] ? __pfx_lock_acquire+0x10/0x10 [ 32.830297] ? __pfx_mmap_region+0x10/0x10 [ 32.830868] ? security_mmap_addr+0x7d/0xa0 [ 32.831440] ? get_unmapped_area+0x1f5/0x3f0 [ 32.832027] do_mmap+0x854/0xf00 [ 32.832491] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.833028] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.833630] ksys_mmap_pgoff+0x3af/0x500 [ 32.834177] do_syscall_64+0x3f/0x90 [ 32.834687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.835379] RIP: 0033:0x7f015e5d4d82 [ 32.835868] 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 [ 32.838158] RSP: 002b:00007ffecc15dc78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.839126] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f015e5d4d82 [ 32.840068] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f015da0e000 [ 32.841005] RBP: 00007f015da0e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.841913] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560714ee6ec0 [ 32.842829] R13: 00007ffecc15dc90 R14: 00007ffecc15dcc0 R15: 00007ffecc15e020 [ 32.843765] [ 32.844086] [ 32.844314] Allocated by task 214: [ 32.844780] kasan_save_stack+0x22/0x50 [ 32.845356] kasan_set_track+0x25/0x30 [ 32.845883] __kasan_slab_alloc+0x59/0x70 [ 32.846441] kmem_cache_alloc+0x16b/0x370 [ 32.846993] vm_area_dup+0x20/0x160 [ 32.847476] __split_vma+0x170/0x950 [ 32.847968] split_vma+0xc6/0x110 [ 32.848441] mprotect_fixup+0x8d2/0xb30 [ 32.848990] do_mprotect_pkey+0x87e/0xd40 [ 32.849545] __x64_sys_mprotect+0x78/0xc0 [ 32.850104] do_syscall_64+0x3f/0x90 [ 32.850611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.851303] [ 32.851529] Freed by task 214: [ 32.851953] kasan_save_stack+0x22/0x50 [ 32.852553] kasan_set_track+0x25/0x30 [ 32.853087] kasan_save_free_info+0x2b/0x50 [ 32.853653] __kasan_slab_free+0x10a/0x190 [ 32.854229] kmem_cache_free+0x10d/0x4d0 [ 32.854768] rcu_core+0x8c8/0x2860 [ 32.855246] __do_softirq+0x1b7/0x7d4 [ 32.855760] [ 32.855993] Last potentially related work creation: [ 32.856620] kasan_save_stack+0x22/0x50 [ 32.857162] __kasan_record_aux_stack+0x8e/0xa0 [ 32.857776] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.858468] remove_vma+0x139/0x170 [ 32.858946] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.859545] do_vmi_munmap+0x1f1/0x2b0 [ 32.860068] __vm_munmap+0x138/0x3a0 [ 32.860568] __x64_sys_munmap+0x59/0x80 [ 32.861116] do_syscall_64+0x3f/0x90 [ 32.861625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.862310] [ 32.862538] The buggy address belongs to the object at ffff8880159aebc8 [ 32.862538] which belongs to the cache vm_area_struct of size 168 [ 32.864111] The buggy address is located 88 bytes inside of [ 32.864111] freed 168-byte region [ffff8880159aebc8, ffff8880159aec70) [ 32.865621] [ 32.865852] The buggy address belongs to the physical page: [ 32.866556] page:0000000048f4ca05 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159ae [ 32.867727] memcg:ffff88800c543d01 [ 32.868188] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.868875] page_type: 0xffffffff() [ 32.869382] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.870368] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c543d01 [ 32.871343] page dumped because: kasan: bad access detected [ 32.872067] [ 32.872303] Memory state around the buggy address: [ 32.872937] ffff8880159aeb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.873913] ffff8880159aeb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.874871] >ffff8880159aec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.875819] ^ [ 32.876405] ffff8880159aec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.877397] ffff8880159aed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.878346] ================================================================== [ 32.879373] Disabling lock debugging due to kernel taint [ 34.971115] BUG: Bad rss-counter state mm:00000000c72c3fed type:MM_FILEPAGES val:33 [ 34.972283] BUG: Bad rss-counter state mm:00000000c72c3fed type:MM_ANONPAGES val:22 [ 35.468638] BUG: Bad rss-counter state mm:00000000650ba848 type:MM_FILEPAGES val:33 [ 35.469747] BUG: Bad rss-counter state mm:00000000650ba848 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19615' (ECDSA) to the list of known hosts. 2023/06/20 02:36:47 fuzzer started 2023/06/20 02:36:47 dialing manager at localhost:44161 2023/06/20 02:36:47 checking machine... 2023/06/20 02:36:47 checking revisions... [ 36.111698] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:36:48 testing simple program... [ 36.166631] cgroup: Unknown subsys name 'net' [ 36.230373] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:36:44 Registers: info registers vcpu 0 RAX=00000016260fd5a4 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=00000000000529dd RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ec7dc R11=00000000000b6996 R12=00000000000529dd R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000012 [----A--] 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 00007fcd9e1a6700 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=00007fbdce8e6030 CR3=00000000169b6000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343033 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff844c0cea RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11003074db6 RSI=ffffffff844c0cea RDI=ffff8880183a6e20 RBP=ffff8880183a6df0 RSP=ffff8880183a6d50 R8 =0000000000000001 R9 =ffff8880183a6d98 R10=0000000000038001 R11=00000000000b3e90 R12=ffff8880183a6e20 R13=0000000000000000 R14=ffff888016dd3680 R15=ffff8880183a7278 RIP=ffffffff84532440 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 00007f5280a5a900 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=00007f5280a39020 CR3=000000000e2d6000 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