syzkaller login: [ 30.712126] BUG: Bad rss-counter state mm:0000000063b20c85 type:MM_FILEPAGES val:33 [ 30.713304] BUG: Bad rss-counter state mm:0000000063b20c85 type:MM_ANONPAGES val:22 [ 30.754211] ================================================================== [ 30.755145] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.756155] Read of size 8 at addr ffff88801806c140 by task sshd/221 [ 30.756933] [ 30.757151] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.758058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.759049] Call Trace: [ 30.759368] [ 30.759664] dump_stack_lvl+0x91/0xf0 [ 30.760187] print_report+0xcc/0x620 [ 30.760685] ? __virt_addr_valid+0x102/0x340 [ 30.761247] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761899] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762522] kasan_report+0xbe/0xf0 [ 30.763032] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.763667] vma_interval_tree_remove+0xc75/0xec0 [ 30.764298] vma_prepare+0xc54/0x11a0 [ 30.764804] __split_vma+0x5af/0x950 [ 30.765281] ? __pfx___split_vma+0x10/0x10 [ 30.765839] ? find_held_lock+0x2c/0x110 [ 30.766363] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.766959] ? lock_is_held_type+0x9f/0x120 [ 30.767495] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.768147] ? mtree_range_walk+0x632/0x900 [ 30.768715] ? mas_walk+0x5c7/0x7c0 [ 30.769203] do_vmi_munmap+0x1f1/0x2b0 [ 30.769726] mmap_region+0x1f9/0x2660 [ 30.770209] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.770734] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.771451] ? __pfx_lock_acquire+0x10/0x10 [ 30.772021] ? __pfx_mmap_region+0x10/0x10 [ 30.772552] ? security_mmap_addr+0x7d/0xa0 [ 30.773254] ? get_unmapped_area+0x1f5/0x3f0 [ 30.773927] do_mmap+0x854/0xf00 [ 30.774494] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.775113] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.775851] ksys_mmap_pgoff+0x3af/0x500 [ 30.776366] do_syscall_64+0x3f/0x90 [ 30.776862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.777513] RIP: 0033:0x7f74085e2d82 [ 30.777996] 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 [ 30.780210] RSP: 002b:00007fff365701b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.781143] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74085e2d82 [ 30.782042] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7407a1c000 [ 30.782923] RBP: 00007f7407a1c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.783819] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602e31f0ec0 [ 30.784701] R13: 00007fff365701d0 R14: 00007fff36570200 R15: 00007fff36570560 [ 30.785570] [ 30.785889] [ 30.786112] Allocated by task 214: [ 30.786549] kasan_save_stack+0x22/0x50 [ 30.787081] kasan_set_track+0x25/0x30 [ 30.787580] __kasan_slab_alloc+0x59/0x70 [ 30.788132] kmem_cache_alloc+0x16b/0x370 [ 30.788685] vm_area_dup+0x20/0x160 [ 30.789141] __split_vma+0x170/0x950 [ 30.789631] split_vma+0xc6/0x110 [ 30.790095] mprotect_fixup+0x8d2/0xb30 [ 30.790621] do_mprotect_pkey+0x87e/0xd40 [ 30.791152] __x64_sys_mprotect+0x78/0xc0 [ 30.791688] do_syscall_64+0x3f/0x90 [ 30.792183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.792847] [ 30.793062] Freed by task 214: [ 30.793560] kasan_save_stack+0x22/0x50 [ 30.794209] kasan_set_track+0x25/0x30 [ 30.794860] kasan_save_free_info+0x2b/0x50 [ 30.795547] __kasan_slab_free+0x10a/0x190 [ 30.796228] kmem_cache_free+0x10d/0x4d0 [ 30.796897] rcu_core+0x8c8/0x2860 [ 30.797489] __do_softirq+0x1b7/0x7d4 [ 30.798121] [ 30.798409] Last potentially related work creation: [ 30.799202] kasan_save_stack+0x22/0x50 [ 30.799916] __kasan_record_aux_stack+0x8e/0xa0 [ 30.800691] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.801550] remove_vma+0x139/0x170 [ 30.802147] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.802823] do_vmi_munmap+0x1f1/0x2b0 [ 30.803413] __vm_munmap+0x138/0x3a0 [ 30.803987] __x64_sys_munmap+0x59/0x80 [ 30.804597] do_syscall_64+0x3f/0x90 [ 30.805181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.805966] [ 30.806234] The buggy address belongs to the object at ffff88801806c0e8 [ 30.806234] which belongs to the cache vm_area_struct of size 168 [ 30.808070] The buggy address is located 88 bytes inside of [ 30.808070] freed 168-byte region [ffff88801806c0e8, ffff88801806c190) [ 30.809830] [ 30.810091] The buggy address belongs to the physical page: [ 30.810904] page:000000001b3cf6b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1806c [ 30.812264] memcg:ffff88801806d001 [ 30.812795] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.813586] page_type: 0xffffffff() [ 30.814143] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 30.815296] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801806d001 [ 30.816499] page dumped because: kasan: bad access detected [ 30.817323] [ 30.817549] Memory state around the buggy address: [ 30.818145] ffff88801806c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.819029] ffff88801806c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.819913] >ffff88801806c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.820813] ^ [ 30.821445] ffff88801806c180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.822325] ffff88801806c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.823194] ================================================================== [ 30.824700] Disabling lock debugging due to kernel taint [ 33.069496] BUG: Bad rss-counter state mm:00000000c858f2b3 type:MM_FILEPAGES val:33 [ 33.070667] BUG: Bad rss-counter state mm:00000000c858f2b3 type:MM_ANONPAGES val:22 [ 33.491812] BUG: Bad rss-counter state mm:00000000febab73d type:MM_FILEPAGES val:33 [ 33.492834] BUG: Bad rss-counter state mm:00000000febab73d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62142' (ECDSA) to the list of known hosts. 2023/06/20 06:02:18 fuzzer started 2023/06/20 06:02:18 dialing manager at localhost:44161 2023/06/20 06:02:18 checking machine... 2023/06/20 06:02:18 checking revisions... [ 34.229043] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:02:18 testing simple program... [ 34.281841] cgroup: Unknown subsys name 'net' [ 34.330911] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:02:17 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=000000000011d528 RCX=00007f1c8e035344 RDX=00007fff8f8740d8 RSI=00007fff8f8740d8 RDI=000055fe6bd19330 RBP=00007fff8f874158 RSP=00007fff8f8740d0 R8 =0000000000000038 R9 =000000000011d528 R10=0000000000000002 R11=00007f1c8c9d27f8 R12=00007f1c8c9ba528 R13=000055fe6bd18400 R14=0000000000000006 R15=00007fff8f8740e0 RIP=00007f1c8e035475 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1c8d4b2900 00000000 00000000 GS =0000 0000000000000000 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=00007f1c8c8e5620 CR3=000000000d7b8000 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=000000000010d7302fccd54c36d8a3f3 XMM01=4fa8e05b7f27e89a7349456adf7db56f XMM02=000000000011cdb0eff9b2d0a8fce9cb XMM03=000000000011ce802c67c8bc2e329bc3 XMM04=f2399cefd34704e400000000000ae988 XMM05=5e3c9448492d6c6c00000000001350b0 XMM06=c291bd5c70af25b90000000000134150 XMM07=e042d86d42eb936e00000000001246b0 XMM08=30a2214a22822f21000000000011ce80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88807ffd6df0 RCX=1ffffd40000b5504 RDX=dffffc0000000000 RSI=00000000000000ff RDI=ffffea00005aa820 RBP=ffff88807ffd7020 RSP=ffff88800ca37998 R8 =0000000000000000 R9 =0000000000000000 R10=ffffed1002d54000 R11=0000000000070000 R12=0000000000000020 R13=0000000000000000 R14=ffffffff852c41e8 R15=ffffea00005aa800 RIP=ffffffff81788ad8 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 00007f1a51bd7900 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=00007ffc58828000 CR3=0000000016674000 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