syzkaller login: [ 64.937459] BUG: Bad rss-counter state mm:00000000b6c11ae3 type:MM_FILEPAGES val:33 [ 64.938640] BUG: Bad rss-counter state mm:00000000b6c11ae3 type:MM_ANONPAGES val:22 [ 64.971012] ================================================================== [ 64.971492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.971992] Read of size 8 at addr ffff8880191b0310 by task sshd/224 [ 64.972398] [ 64.972516] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 64.972974] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.973492] Call Trace: [ 64.973663] [ 64.973816] dump_stack_lvl+0x91/0xf0 [ 64.974081] print_report+0xcc/0x620 [ 64.974338] ? __virt_addr_valid+0x102/0x340 [ 64.974645] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.974975] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.975305] kasan_report+0xbe/0xf0 [ 64.975559] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.975888] vma_interval_tree_remove+0xc75/0xec0 [ 64.976269] vma_prepare+0xc54/0x11a0 [ 64.976553] __split_vma+0x5af/0x950 [ 64.976804] ? __pfx___split_vma+0x10/0x10 [ 64.977087] ? find_held_lock+0x2c/0x110 [ 64.977366] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.977678] ? lock_is_held_type+0x9f/0x120 [ 64.977970] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.978296] ? mtree_range_walk+0x632/0x900 [ 64.978609] ? mas_walk+0x5c7/0x7c0 [ 64.978866] do_vmi_munmap+0x1f1/0x2b0 [ 64.979127] mmap_region+0x1f9/0x2660 [ 64.979388] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.979675] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.980090] ? __pfx_lock_acquire+0x10/0x10 [ 64.980397] ? __pfx_mmap_region+0x10/0x10 [ 64.980699] ? security_mmap_addr+0x7d/0xa0 [ 64.981002] ? get_unmapped_area+0x1f5/0x3f0 [ 64.981314] do_mmap+0x854/0xf00 [ 64.981561] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.981845] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.982164] ksys_mmap_pgoff+0x3af/0x500 [ 64.982449] do_syscall_64+0x3f/0x90 [ 64.982732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.983101] RIP: 0033:0x7ff1eeecad82 [ 64.983358] 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 [ 64.984591] RSP: 002b:00007fffd738f028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.985104] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff1eeecad82 [ 64.985590] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1ee304000 [ 64.986076] RBP: 00007ff1ee304000 R08: 0000000000000009 R09: 0000000000001000 [ 64.986567] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f30dd6b20 [ 64.987048] R13: 00007fffd738f040 R14: 00007fffd738f070 R15: 00007fffd738f3d0 [ 64.987535] [ 64.987695] [ 64.987813] Allocated by task 217: [ 64.988061] kasan_save_stack+0x22/0x50 [ 64.988347] kasan_set_track+0x25/0x30 [ 64.988627] __kasan_slab_alloc+0x59/0x70 [ 64.988923] kmem_cache_alloc+0x16b/0x370 [ 64.989222] vm_area_dup+0x20/0x160 [ 64.989483] __split_vma+0x170/0x950 [ 64.989745] split_vma+0xc6/0x110 [ 64.989991] mprotect_fixup+0x8d2/0xb30 [ 64.990273] do_mprotect_pkey+0x87e/0xd40 [ 64.990572] __x64_sys_mprotect+0x78/0xc0 [ 64.990867] do_syscall_64+0x3f/0x90 [ 64.991135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.991498] [ 64.991622] Freed by task 217: [ 64.991840] kasan_save_stack+0x22/0x50 [ 64.992125] kasan_set_track+0x25/0x30 [ 64.992409] kasan_save_free_info+0x2b/0x50 [ 64.992715] __kasan_slab_free+0x10a/0x190 [ 64.993015] kmem_cache_free+0x10d/0x4d0 [ 64.993310] rcu_core+0x8c8/0x2860 [ 64.993566] __do_softirq+0x1b7/0x7d4 [ 64.993843] [ 64.993967] Last potentially related work creation: [ 64.994300] kasan_save_stack+0x22/0x50 [ 64.994605] __kasan_record_aux_stack+0x8e/0xa0 [ 64.994937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.995303] remove_vma+0x139/0x170 [ 64.995554] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.995874] do_vmi_munmap+0x1f1/0x2b0 [ 64.996152] __vm_munmap+0x138/0x3a0 [ 64.996411] __x64_sys_munmap+0x59/0x80 [ 64.996698] do_syscall_64+0x3f/0x90 [ 64.996972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.997333] [ 64.997457] The buggy address belongs to the object at ffff8880191b02b8 [ 64.997457] which belongs to the cache vm_area_struct of size 168 [ 64.998288] The buggy address is located 88 bytes inside of [ 64.998288] freed 168-byte region [ffff8880191b02b8, ffff8880191b0360) [ 64.999084] [ 64.999207] The buggy address belongs to the physical page: [ 64.999589] page:0000000047ba486f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x191b0 [ 65.000213] memcg:ffff88800f2b1c01 [ 65.000449] flags: 0x100000000000200(slab|node=0|zone=1) [ 65.000819] page_type: 0xffffffff() [ 65.001076] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 65.001605] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2b1c01 [ 65.002128] page dumped because: kasan: bad access detected [ 65.002506] [ 65.002638] Memory state around the buggy address: [ 65.002971] ffff8880191b0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 65.003466] ffff8880191b0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 65.003955] >ffff8880191b0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 65.004435] ^ [ 65.004695] ffff8880191b0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 65.005189] ffff8880191b0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 65.005673] ================================================================== [ 65.006250] Disabling lock debugging due to kernel taint [ 66.989396] BUG: Bad rss-counter state mm:000000006f259af5 type:MM_FILEPAGES val:33 [ 66.990897] BUG: Bad rss-counter state mm:000000006f259af5 type:MM_ANONPAGES val:22 [ 67.531003] BUG: Bad rss-counter state mm:000000002010763d type:MM_FILEPAGES val:33 [ 67.532137] BUG: Bad rss-counter state mm:000000002010763d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62764' (ECDSA) to the list of known hosts. 2023/06/19 14:10:19 fuzzer started 2023/06/19 14:10:19 dialing manager at localhost:44161 2023/06/19 14:10:19 checking machine... 2023/06/19 14:10:19 checking revisions... [ 68.142803] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:10:19 testing simple program... [ 68.199263] cgroup: Unknown subsys name 'net' [ 68.259330] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:10:15 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9c13b6 RSP=ffff88806ce09da0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b520 R13=ffffffff81378294 R14=ffff88806ce35000 R15=ffff88800d7a0d90 RIP=ffffffff812d86a2 RFL=00000247 [---Z-PC] 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 00007fac91ea8900 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=00007ffdf7cea000 CR3=000000000f0ca000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007ffc27f448c8 CR3=0000000019032000 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=2038313a30313a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a30313a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000