syzkaller login: [ 30.637748] BUG: Bad rss-counter state mm:000000005352b91c type:MM_FILEPAGES val:33 [ 30.638798] BUG: Bad rss-counter state mm:000000005352b91c type:MM_ANONPAGES val:22 [ 30.811946] ================================================================== [ 30.812906] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.813875] Read of size 8 at addr ffff888016abab38 by task sshd/219 [ 30.814654] [ 30.814881] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.815902] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.816906] Call Trace: [ 30.817250] [ 30.817541] dump_stack_lvl+0x91/0xf0 [ 30.818059] print_report+0xcc/0x620 [ 30.818559] ? __virt_addr_valid+0x102/0x340 [ 30.819139] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819792] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.820435] kasan_report+0xbe/0xf0 [ 30.820917] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.821557] vma_interval_tree_remove+0xc75/0xec0 [ 30.822178] vma_prepare+0xc54/0x11a0 [ 30.822664] __split_vma+0x5af/0x950 [ 30.823150] ? __pfx___split_vma+0x10/0x10 [ 30.823695] ? find_held_lock+0x2c/0x110 [ 30.824244] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.824841] ? lock_is_held_type+0x9f/0x120 [ 30.825406] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.826039] ? mtree_range_walk+0x632/0x900 [ 30.826623] ? mas_walk+0x5c7/0x7c0 [ 30.827126] do_vmi_munmap+0x1f1/0x2b0 [ 30.827634] mmap_region+0x1f9/0x2660 [ 30.828144] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.828663] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.829416] ? __pfx_lock_acquire+0x10/0x10 [ 30.829965] ? __pfx_mmap_region+0x10/0x10 [ 30.830508] ? security_mmap_addr+0x7d/0xa0 [ 30.831057] ? get_unmapped_area+0x1f5/0x3f0 [ 30.831621] do_mmap+0x854/0xf00 [ 30.832075] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.832583] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.833168] ksys_mmap_pgoff+0x3af/0x500 [ 30.833683] do_syscall_64+0x3f/0x90 [ 30.834173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.834835] RIP: 0033:0x7f8816437d82 [ 30.835301] 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 [ 30.837490] RSP: 002b:00007ffe1922d888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.838418] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8816437d82 [ 30.839299] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8815871000 [ 30.840199] RBP: 00007f8815871000 R08: 0000000000000009 R09: 0000000000001000 [ 30.841066] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640cdb6db20 [ 30.841934] R13: 00007ffe1922d8a0 R14: 00007ffe1922d8d0 R15: 00007ffe1922dc30 [ 30.842815] [ 30.843113] [ 30.843330] Allocated by task 212: [ 30.843781] kasan_save_stack+0x22/0x50 [ 30.844299] kasan_set_track+0x25/0x30 [ 30.844809] __kasan_slab_alloc+0x59/0x70 [ 30.845341] kmem_cache_alloc+0x16b/0x370 [ 30.845879] vm_area_dup+0x20/0x160 [ 30.846349] __split_vma+0x170/0x950 [ 30.846832] split_vma+0xc6/0x110 [ 30.847281] mprotect_fixup+0x8d2/0xb30 [ 30.847801] do_mprotect_pkey+0x87e/0xd40 [ 30.848331] __x64_sys_mprotect+0x78/0xc0 [ 30.848864] do_syscall_64+0x3f/0x90 [ 30.849352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.850004] [ 30.850227] Freed by task 212: [ 30.850626] kasan_save_stack+0x22/0x50 [ 30.851138] kasan_set_track+0x25/0x30 [ 30.851644] kasan_save_free_info+0x2b/0x50 [ 30.852201] __kasan_slab_free+0x10a/0x190 [ 30.852744] kmem_cache_free+0x10d/0x4d0 [ 30.853272] rcu_core+0x8c8/0x2860 [ 30.853734] __do_softirq+0x1b7/0x7d4 [ 30.854228] [ 30.854448] Last potentially related work creation: [ 30.855047] kasan_save_stack+0x22/0x50 [ 30.855569] __kasan_record_aux_stack+0x8e/0xa0 [ 30.856168] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.856820] remove_vma+0x139/0x170 [ 30.857278] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.857862] do_vmi_munmap+0x1f1/0x2b0 [ 30.858364] __vm_munmap+0x138/0x3a0 [ 30.858838] __x64_sys_munmap+0x59/0x80 [ 30.859341] do_syscall_64+0x3f/0x90 [ 30.859847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.860502] [ 30.860722] The buggy address belongs to the object at ffff888016abaae0 [ 30.860722] which belongs to the cache vm_area_struct of size 168 [ 30.862231] The buggy address is located 88 bytes inside of [ 30.862231] freed 168-byte region [ffff888016abaae0, ffff888016abab88) [ 30.863678] [ 30.863911] The buggy address belongs to the physical page: [ 30.864587] page:00000000a9625afc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16aba [ 30.865695] memcg:ffff888009745501 [ 30.866126] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.866798] page_type: 0xffffffff() [ 30.867266] raw: 0100000000000200 ffff8880087a0c80 ffffea0000681300 dead000000000002 [ 30.868234] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009745501 [ 30.869165] page dumped because: kasan: bad access detected [ 30.869862] [ 30.870087] Memory state around the buggy address: [ 30.870685] ffff888016abaa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.871568] ffff888016abaa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.872448] >ffff888016abab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.873315] ^ [ 30.873943] ffff888016abab80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 30.874814] ffff888016abac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.875684] ================================================================== [ 30.876711] Disabling lock debugging due to kernel taint [ 32.838739] BUG: Bad rss-counter state mm:000000000399a88e type:MM_FILEPAGES val:33 [ 32.839732] BUG: Bad rss-counter state mm:000000000399a88e type:MM_ANONPAGES val:22 [ 33.416580] BUG: Bad rss-counter state mm:00000000562180fd type:MM_FILEPAGES val:33 [ 33.417754] BUG: Bad rss-counter state mm:00000000562180fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44541' (ECDSA) to the list of known hosts. 2023/06/21 02:47:24 fuzzer started 2023/06/21 02:47:24 dialing manager at localhost:36067 2023/06/21 02:47:24 checking machine... 2023/06/21 02:47:24 checking revisions... [ 34.028447] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:47:24 testing simple program... [ 34.081238] cgroup: Unknown subsys name 'net' [ 34.148160] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:47:24 Registers: info registers vcpu 0 RAX=0000000000020cbd RBX=0000000000000002 RCX=ffffffff81809adc RDX=0000000000020cbf RSI=000000000000809a RDI=ffffffff86509c5c RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130837 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 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=00007fb53c44b028 CR3=000000000da4e000 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=9034f571b66946a97f4b0989a907fd20 XMM02=ec2efd57dc4c00df000000000011a118 XMM03=27dfed80583c96b5000000000011a1e8 XMM04=c4c848bc444f30fb00000000000ae988 XMM05=dfcdbad4f1609c370000000000131498 XMM06=1bbd8a90a266f1e50000000000130300 XMM07=e042d86d42eb936e00000000001218a8 XMM08=27dfed80583c96b5000000000011a1e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb1340 RBX=ffffffff85d89a04 RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff88801923f720 R8 =ffffffff8608a556 R9 =ffff88801923f868 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a10 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007ff2950f6900 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=00007ffed61f9000 CR3=000000000e222000 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=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