syzkaller login: [ 30.739097] BUG: Bad rss-counter state mm:00000000a517ef63 type:MM_FILEPAGES val:33 [ 30.740325] BUG: Bad rss-counter state mm:00000000a517ef63 type:MM_ANONPAGES val:22 [ 30.781529] ================================================================== [ 30.782480] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.783470] Read of size 8 at addr ffff88800c9d5968 by task sshd/219 [ 30.784246] [ 30.784469] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.785329] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.786363] Call Trace: [ 30.786687] [ 30.786975] dump_stack_lvl+0x91/0xf0 [ 30.787478] print_report+0xcc/0x620 [ 30.787966] ? __virt_addr_valid+0x102/0x340 [ 30.788523] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.789145] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.789763] kasan_report+0xbe/0xf0 [ 30.790241] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.790869] vma_interval_tree_remove+0xc75/0xec0 [ 30.791496] vma_prepare+0xc54/0x11a0 [ 30.791978] __split_vma+0x5af/0x950 [ 30.792457] ? __pfx___split_vma+0x10/0x10 [ 30.792984] ? find_held_lock+0x2c/0x110 [ 30.793506] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.794069] ? lock_is_held_type+0x9f/0x120 [ 30.794619] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.795222] ? mtree_range_walk+0x632/0x900 [ 30.795797] ? mas_walk+0x5c7/0x7c0 [ 30.796276] do_vmi_munmap+0x1f1/0x2b0 [ 30.796766] mmap_region+0x1f9/0x2660 [ 30.797253] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.797777] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.798493] ? __pfx_lock_acquire+0x10/0x10 [ 30.799024] ? __pfx_mmap_region+0x10/0x10 [ 30.799570] ? security_mmap_addr+0x7d/0xa0 [ 30.800098] ? get_unmapped_area+0x1f5/0x3f0 [ 30.800667] do_mmap+0x854/0xf00 [ 30.801105] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.801595] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.802149] ksys_mmap_pgoff+0x3af/0x500 [ 30.802654] do_syscall_64+0x3f/0x90 [ 30.803126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.803798] RIP: 0033:0x7f5b3559ed82 [ 30.804256] 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 [ 30.806375] RSP: 002b:00007ffee13202f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.807296] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b3559ed82 [ 30.808144] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b349d8000 [ 30.808996] RBP: 00007f5b349d8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.809834] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562620179f70 [ 30.810680] R13: 00007ffee1320310 R14: 00007ffee1320340 R15: 00007ffee13206a0 [ 30.811542] [ 30.811829] [ 30.812047] Allocated by task 212: [ 30.812472] kasan_save_stack+0x22/0x50 [ 30.812976] kasan_set_track+0x25/0x30 [ 30.813472] __kasan_slab_alloc+0x59/0x70 [ 30.813989] kmem_cache_alloc+0x16b/0x370 [ 30.814500] vm_area_dup+0x20/0x160 [ 30.814952] __split_vma+0x170/0x950 [ 30.815429] split_vma+0xc6/0x110 [ 30.815865] mprotect_fixup+0x8d2/0xb30 [ 30.816370] do_mprotect_pkey+0x87e/0xd40 [ 30.816895] __x64_sys_mprotect+0x78/0xc0 [ 30.817416] do_syscall_64+0x3f/0x90 [ 30.817886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.818530] [ 30.818748] Freed by task 212: [ 30.819145] kasan_save_stack+0x22/0x50 [ 30.819653] kasan_set_track+0x25/0x30 [ 30.820139] kasan_save_free_info+0x2b/0x50 [ 30.820676] __kasan_slab_free+0x10a/0x190 [ 30.821209] kmem_cache_free+0x10d/0x4d0 [ 30.821713] rcu_core+0x8c8/0x2860 [ 30.822154] __do_softirq+0x1b7/0x7d4 [ 30.822627] [ 30.822841] Last potentially related work creation: [ 30.823438] kasan_save_stack+0x22/0x50 [ 30.823934] __kasan_record_aux_stack+0x8e/0xa0 [ 30.824510] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.825145] remove_vma+0x139/0x170 [ 30.825596] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.826159] do_vmi_munmap+0x1f1/0x2b0 [ 30.826643] __vm_munmap+0x138/0x3a0 [ 30.827105] __x64_sys_munmap+0x59/0x80 [ 30.827613] do_syscall_64+0x3f/0x90 [ 30.828080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.828712] [ 30.828926] The buggy address belongs to the object at ffff88800c9d5910 [ 30.828926] which belongs to the cache vm_area_struct of size 168 [ 30.830396] The buggy address is located 88 bytes inside of [ 30.830396] freed 168-byte region [ffff88800c9d5910, ffff88800c9d59b8) [ 30.831824] [ 30.832039] The buggy address belongs to the physical page: [ 30.832707] page:00000000f7de7df0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9d5 [ 30.833801] memcg:ffff88801a3fce01 [ 30.834230] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.834880] page_type: 0xffffffff() [ 30.835356] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.836291] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3fce01 [ 30.837193] page dumped because: kasan: bad access detected [ 30.837863] [ 30.838085] Memory state around the buggy address: [ 30.838671] ffff88800c9d5800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.839530] ffff88800c9d5880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.840380] >ffff88800c9d5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.841218] ^ [ 30.841992] ffff88800c9d5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.842842] ffff88800c9d5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.843705] ================================================================== [ 30.844766] Disabling lock debugging due to kernel taint [ 33.660511] BUG: Bad rss-counter state mm:000000001b0f614a type:MM_FILEPAGES val:33 [ 33.661676] BUG: Bad rss-counter state mm:000000001b0f614a type:MM_ANONPAGES val:22 [ 34.141488] BUG: Bad rss-counter state mm:00000000704a167d type:MM_FILEPAGES val:33 [ 34.142493] BUG: Bad rss-counter state mm:00000000704a167d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21946' (ECDSA) to the list of known hosts. 2023/06/20 00:58:08 fuzzer started 2023/06/20 00:58:08 dialing manager at localhost:44161 2023/06/20 00:58:08 checking machine... 2023/06/20 00:58:08 checking revisions... [ 34.863080] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:58:08 testing simple program... [ 34.907130] cgroup: Unknown subsys name 'net' [ 34.962592] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:58:07 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806ce09928 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b932 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 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=00007f0e52ec4750 CR3=000000000d5f8000 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=cb85ce0c0750f986a54c66e3d7255df0 XMM02=000000000011d340eff9b2d0a8fce9cb XMM03=000000000011d4102c67c8bc2e329bc3 XMM04=3abe0b5175858f3b00000000000ae988 XMM05=dfcdbad4f1609c370000000000133bc0 XMM06=0960bd6ca7f8992b0000000000132a28 XMM07=e042d86d42eb936e0000000000124338 XMM08=0dbcc888c97d0d97000000000011d410 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000200000000 RBX=00005578ee0f7028 RCX=0000000200000000 RDX=0000000000000000 RSI=0000000000000000 RDI=00005578ee111ec0 RBP=00007ffcae860ff0 RSP=00007ffcae860f20 R8 =00005578ee111ec0 R9 =00007ffcae860ef0 R10=000000000000002c R11=0000000000000202 R12=0000000000000000 R13=0000000000000000 R14=00007ffcae861570 R15=00007ffcae861320 RIP=00007f5379f7d922 RFL=00000206 [-----P-] 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 00007f53793f2900 00000000 00000000 GS =0000 0000000000000000 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=00005578ee0f4f40 CR3=000000000ed8a000 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