syzkaller login: [ 50.224096] BUG: Bad rss-counter state mm:00000000b097f4ad type:MM_FILEPAGES val:33 [ 50.225312] BUG: Bad rss-counter state mm:00000000b097f4ad type:MM_ANONPAGES val:22 [ 50.364376] ================================================================== [ 50.365018] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.365640] Read of size 8 at addr ffff888009825a50 by task sshd/219 [ 50.366165] [ 50.366311] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.366876] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.367582] Call Trace: [ 50.367817] [ 50.368021] dump_stack_lvl+0x91/0xf0 [ 50.368356] print_report+0xcc/0x620 [ 50.369167] ? __virt_addr_valid+0x102/0x340 [ 50.369535] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.369972] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.370392] kasan_report+0xbe/0xf0 [ 50.370704] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.371110] vma_interval_tree_remove+0xc75/0xec0 [ 50.375580] vma_prepare+0xc54/0x11a0 [ 50.375896] __split_vma+0x5af/0x950 [ 50.376226] ? __pfx___split_vma+0x10/0x10 [ 50.377070] ? find_held_lock+0x2c/0x110 [ 50.377963] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.378934] ? lock_is_held_type+0x9f/0x120 [ 50.379984] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.381104] ? mtree_range_walk+0x632/0x900 [ 50.382086] ? mas_walk+0x5c7/0x7c0 [ 50.382876] do_vmi_munmap+0x1f1/0x2b0 [ 50.383715] mmap_region+0x1f9/0x2660 [ 50.384051] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.384401] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.384876] ? __pfx_lock_acquire+0x10/0x10 [ 50.385238] ? __pfx_mmap_region+0x10/0x10 [ 50.385599] ? security_mmap_addr+0x7d/0xa0 [ 50.385964] ? get_unmapped_area+0x1f5/0x3f0 [ 50.386335] do_mmap+0x854/0xf00 [ 50.386648] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.387014] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.387424] ksys_mmap_pgoff+0x3af/0x500 [ 50.387770] do_syscall_64+0x3f/0x90 [ 50.388104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.388556] RIP: 0033:0x7f8dff50dd82 [ 50.388879] 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 [ 50.390300] RSP: 002b:00007ffd9cfe2a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.390906] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8dff50dd82 [ 50.391519] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8dfe947000 [ 50.392078] RBP: 00007f8dfe947000 R08: 0000000000000009 R09: 0000000000001000 [ 50.392655] R10: 0000000000000812 R11: 0000000000000206 R12: 000055af0ea4fd90 [ 50.393234] R13: 00007ffd9cfe2a90 R14: 00007ffd9cfe2ac0 R15: 00007ffd9cfe2e20 [ 50.393811] [ 50.394020] [ 50.394173] Allocated by task 212: [ 50.394474] kasan_save_stack+0x22/0x50 [ 50.394829] kasan_set_track+0x25/0x30 [ 50.395175] __kasan_slab_alloc+0x59/0x70 [ 50.395565] kmem_cache_alloc+0x16b/0x370 [ 50.395919] vm_area_dup+0x20/0x160 [ 50.396236] __split_vma+0x170/0x950 [ 50.396564] split_vma+0xc6/0x110 [ 50.396876] mprotect_fixup+0x8d2/0xb30 [ 50.397232] do_mprotect_pkey+0x87e/0xd40 [ 50.397587] __x64_sys_mprotect+0x78/0xc0 [ 50.397929] do_syscall_64+0x3f/0x90 [ 50.398227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.398652] [ 50.398808] Freed by task 202: [ 50.399080] kasan_save_stack+0x22/0x50 [ 50.399485] kasan_set_track+0x25/0x30 [ 50.399833] kasan_save_free_info+0x2b/0x50 [ 50.400206] __kasan_slab_free+0x10a/0x190 [ 50.400579] kmem_cache_free+0x10d/0x4d0 [ 50.400932] rcu_core+0x8c8/0x2860 [ 50.401244] __do_softirq+0x1b7/0x7d4 [ 50.401630] [ 50.401789] Last potentially related work creation: [ 50.403090] kasan_save_stack+0x22/0x50 [ 50.403538] __kasan_record_aux_stack+0x8e/0xa0 [ 50.403917] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.404344] remove_vma+0x139/0x170 [ 50.404647] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.405020] do_vmi_munmap+0x1f1/0x2b0 [ 50.405347] __vm_munmap+0x138/0x3a0 [ 50.405660] __x64_sys_munmap+0x59/0x80 [ 50.405988] do_syscall_64+0x3f/0x90 [ 50.406306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.406733] [ 50.406877] The buggy address belongs to the object at ffff8880098259f8 [ 50.406877] which belongs to the cache vm_area_struct of size 168 [ 50.407859] The buggy address is located 88 bytes inside of [ 50.407859] freed 168-byte region [ffff8880098259f8, ffff888009825aa0) [ 50.408790] [ 50.408938] The buggy address belongs to the physical page: [ 50.409375] page:000000003d5839cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9825 [ 50.410085] memcg:ffff88801a26eb01 [ 50.410367] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.410796] page_type: 0xffffffff() [ 50.411093] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.415814] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a26eb01 [ 50.416391] page dumped because: kasan: bad access detected [ 50.416806] [ 50.416950] Memory state around the buggy address: [ 50.417342] ffff888009825900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.417883] ffff888009825980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 50.418478] >ffff888009825a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.419087] ^ [ 50.419570] ffff888009825a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 50.420134] ffff888009825b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.420735] ================================================================== [ 50.421619] Disabling lock debugging due to kernel taint [ 52.715362] BUG: Bad rss-counter state mm:000000006b55d767 type:MM_FILEPAGES val:33 [ 52.716049] BUG: Bad rss-counter state mm:000000006b55d767 type:MM_ANONPAGES val:22 [ 53.149803] BUG: Bad rss-counter state mm:0000000048eb0693 type:MM_FILEPAGES val:33 [ 53.150599] BUG: Bad rss-counter state mm:0000000048eb0693 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47029' (ECDSA) to the list of known hosts. 2023/06/20 10:35:31 fuzzer started 2023/06/20 10:35:32 dialing manager at localhost:44161 2023/06/20 10:35:32 checking machine... 2023/06/20 10:35:32 checking revisions... [ 53.842624] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:35:32 testing simple program... [ 53.879835] cgroup: Unknown subsys name 'net' [ 53.954748] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:35:20 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=00007f26ecc32fd0 CR3=000000000c9de000 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=f191179fe713a29360480364d9ebbc6a XMM02=000000000011d438ec2efd57dc4c00df XMM03=0000000000123dd8c85b9098d8e96b2b XMM04=7cfef71b98cc9f7b00000000000ae988 XMM05=19e9129bd510f2350000000000134158 XMM06=d9f62c9496d4255900000000001329e8 XMM07=e042d86d42eb936e0000000000124058 XMM08=c85b9098d8e96b2b000000000011d498 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000072 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8 RSI=ffffffff82505fe5 RDI=ffffffff87f6c0a0 RBP=ffffffff87f6c060 RSP=ffff88800cc37018 R8 =0000000000000001 R9 =000000000000000a R10=0000000000000072 R11=000000003a475542 R12=0000000000000072 R13=ffffffff87f6c060 R14=0000000000000010 R15=ffffffff82505fd0 RIP=ffffffff8250603d RFL=00000002 [-------] 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 00007f65d8f71900 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=00007fc945ddf328 CR3=0000000018d4e000 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