syzkaller login: [ 90.618137] BUG: Bad rss-counter state mm:000000000e75a825 type:MM_FILEPAGES val:33 [ 90.619786] BUG: Bad rss-counter state mm:000000000e75a825 type:MM_ANONPAGES val:22 [ 90.775634] ================================================================== [ 90.776597] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 90.777529] Read of size 8 at addr ffff88800c7b1880 by task sshd/219 [ 90.778300] [ 90.778580] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 90.779772] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 90.780759] Call Trace: [ 90.781138] [ 90.781425] dump_stack_lvl+0x91/0xf0 [ 90.781911] print_report+0xcc/0x620 [ 90.782411] ? __virt_addr_valid+0x102/0x340 [ 90.782956] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.783630] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.784274] kasan_report+0xbe/0xf0 [ 90.784754] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.785382] vma_interval_tree_remove+0xc75/0xec0 [ 90.785985] vma_prepare+0xc54/0x11a0 [ 90.786481] __split_vma+0x5af/0x950 [ 90.786955] ? __pfx___split_vma+0x10/0x10 [ 90.787525] ? find_held_lock+0x2c/0x110 [ 90.788040] do_vmi_align_munmap+0x2ba/0x11f0 [ 90.788621] ? lock_is_held_type+0x9f/0x120 [ 90.789172] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 90.789775] ? mtree_range_walk+0x632/0x900 [ 90.790348] ? mas_walk+0x5c7/0x7c0 [ 90.790818] do_vmi_munmap+0x1f1/0x2b0 [ 90.791344] mmap_region+0x1f9/0x2660 [ 90.791844] ? vm_mmap_pgoff+0x15c/0x3a0 [ 90.792367] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 90.793081] ? __pfx_lock_acquire+0x10/0x10 [ 90.793616] ? __pfx_mmap_region+0x10/0x10 [ 90.794153] ? security_mmap_addr+0x7d/0xa0 [ 90.794684] ? get_unmapped_area+0x1f5/0x3f0 [ 90.795253] do_mmap+0x854/0xf00 [ 90.795718] vm_mmap_pgoff+0x1a6/0x3a0 [ 90.796222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 90.796787] ksys_mmap_pgoff+0x3af/0x500 [ 90.797311] do_syscall_64+0x3f/0x90 [ 90.797786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.798441] RIP: 0033:0x7f9cfbac6d82 [ 90.798894] 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 [ 90.801055] RSP: 002b:00007fffdc307d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 90.801979] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9cfbac6d82 [ 90.802841] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9cfaf00000 [ 90.803730] RBP: 00007f9cfaf00000 R08: 0000000000000009 R09: 0000000000001000 [ 90.804590] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e77872df70 [ 90.805448] R13: 00007fffdc307d80 R14: 00007fffdc307db0 R15: 00007fffdc308110 [ 90.806314] [ 90.806606] [ 90.806820] Allocated by task 212: [ 90.807277] kasan_save_stack+0x22/0x50 [ 90.807806] kasan_set_track+0x25/0x30 [ 90.808317] __kasan_slab_alloc+0x59/0x70 [ 90.808840] kmem_cache_alloc+0x16b/0x370 [ 90.809368] vm_area_dup+0x20/0x160 [ 90.809822] __split_vma+0x170/0x950 [ 90.810303] split_vma+0xc6/0x110 [ 90.810749] mprotect_fixup+0x8d2/0xb30 [ 90.811273] do_mprotect_pkey+0x87e/0xd40 [ 90.811816] __x64_sys_mprotect+0x78/0xc0 [ 90.812356] do_syscall_64+0x3f/0x90 [ 90.812829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.813482] [ 90.813701] Freed by task 212: [ 90.814102] kasan_save_stack+0x22/0x50 [ 90.814601] kasan_set_track+0x25/0x30 [ 90.815114] kasan_save_free_info+0x2b/0x50 [ 90.815680] __kasan_slab_free+0x10a/0x190 [ 90.816227] kmem_cache_free+0x10d/0x4d0 [ 90.816734] rcu_core+0x8c8/0x2860 [ 90.817188] __do_softirq+0x1b7/0x7d4 [ 90.817674] [ 90.817905] Last potentially related work creation: [ 90.818502] kasan_save_stack+0x22/0x50 [ 90.818999] __kasan_record_aux_stack+0x8e/0xa0 [ 90.819606] __call_rcu_common.constprop.0+0x6a/0xb90 [ 90.820259] remove_vma+0x139/0x170 [ 90.820708] do_vmi_align_munmap+0xd4a/0x11f0 [ 90.821277] do_vmi_munmap+0x1f1/0x2b0 [ 90.821762] __vm_munmap+0x138/0x3a0 [ 90.822243] __x64_sys_munmap+0x59/0x80 [ 90.822746] do_syscall_64+0x3f/0x90 [ 90.823239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.823889] [ 90.824115] The buggy address belongs to the object at ffff88800c7b1828 [ 90.824115] which belongs to the cache vm_area_struct of size 168 [ 90.825610] The buggy address is located 88 bytes inside of [ 90.825610] freed 168-byte region [ffff88800c7b1828, ffff88800c7b18d0) [ 90.827026] [ 90.827267] The buggy address belongs to the physical page: [ 90.827944] page:00000000a542f0b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7b1 [ 90.829038] memcg:ffff888019c24101 [ 90.829477] flags: 0x100000000000200(slab|node=0|zone=1) [ 90.830133] page_type: 0xffffffff() [ 90.830580] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 90.831542] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c24101 [ 90.832462] page dumped because: kasan: bad access detected [ 90.833139] [ 90.833353] Memory state around the buggy address: [ 90.833931] ffff88800c7b1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 90.834789] ffff88800c7b1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 90.835700] >ffff88800c7b1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 90.836561] ^ [ 90.836972] ffff88800c7b1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 90.837833] ffff88800c7b1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 90.838696] ================================================================== [ 90.839860] Disabling lock debugging due to kernel taint [ 92.789400] BUG: Bad rss-counter state mm:00000000354ab479 type:MM_FILEPAGES val:33 [ 92.790121] BUG: Bad rss-counter state mm:00000000354ab479 type:MM_ANONPAGES val:22 [ 93.148606] BUG: Bad rss-counter state mm:00000000581f5f74 type:MM_FILEPAGES val:33 [ 93.149728] BUG: Bad rss-counter state mm:00000000581f5f74 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6288' (ECDSA) to the list of known hosts. 2023/06/20 04:44:43 fuzzer started 2023/06/20 04:44:43 dialing manager at localhost:44161 2023/06/20 04:44:43 checking machine... 2023/06/20 04:44:43 checking revisions... [ 93.686495] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:44:43 testing simple program... [ 93.737301] cgroup: Unknown subsys name 'net' [ 93.801935] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:44:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f317d5860a0 CR3=000000000c5c0000 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=c156dc0006940bacb743c848fa00d683 XMM02=2c67c8bc2e329bc30000000000124520 XMM03=fb795ef6d657705600000000001281d0 XMM04=11d88107db8a6d8a00000000000ae988 XMM05=19e9129bd510f2350000000000138400 XMM06=4fda316b135da52b0000000000138288 XMM07=e042d86d42eb936e00000000001284a8 XMM08=27f1bf165ccbeddd0000000000124580 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015a3f7a0 RCX=0000000000000001 RDX=1ffff11002b47f08 RSI=ffffffff844c1db1 RDI=ffff888015a3f7ac RBP=ffff888015a3f840 RSP=ffff888015a3f6b8 R8 =0000000000000001 R9 =ffff888015a3f718 R10=0000000000038001 R11=00000000000b3ca0 R12=ffff888015a3f7a0 R13=0000000000000000 R14=ffff888019fd1b40 R15=0000000000000001 RIP=ffffffff813ad4f7 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 00007fbcc134c900 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=00007fbcc1316008 CR3=000000000c520000 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