syzkaller login: [ 41.587946] BUG: Bad rss-counter state mm:00000000418faae2 type:MM_FILEPAGES val:33 [ 41.588996] BUG: Bad rss-counter state mm:00000000418faae2 type:MM_ANONPAGES val:22 [ 41.764669] ================================================================== [ 41.765619] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.766744] Read of size 8 at addr ffff888013a7cdf0 by task sshd/220 [ 41.767600] [ 41.767821] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.768808] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.770131] Call Trace: [ 41.770569] [ 41.770957] dump_stack_lvl+0x91/0xf0 [ 41.771641] print_report+0xcc/0x620 [ 41.772291] ? __virt_addr_valid+0x102/0x340 [ 41.773061] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.773860] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.774655] kasan_report+0xbe/0xf0 [ 41.775256] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.776014] vma_interval_tree_remove+0xc75/0xec0 [ 41.776730] vma_prepare+0xc54/0x11a0 [ 41.777307] __split_vma+0x5af/0x950 [ 41.777878] ? __pfx___split_vma+0x10/0x10 [ 41.778509] ? find_held_lock+0x2c/0x110 [ 41.779134] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.779876] ? lock_is_held_type+0x9f/0x120 [ 41.780324] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.780819] ? mtree_range_walk+0x632/0x900 [ 41.781269] ? mas_walk+0x5c7/0x7c0 [ 41.781633] do_vmi_munmap+0x1f1/0x2b0 [ 41.782025] mmap_region+0x1f9/0x2660 [ 41.782417] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.782820] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.783386] ? __pfx_lock_acquire+0x10/0x10 [ 41.783804] ? __pfx_mmap_region+0x10/0x10 [ 41.784208] ? security_mmap_addr+0x7d/0xa0 [ 41.784620] ? get_unmapped_area+0x1f5/0x3f0 [ 41.785044] do_mmap+0x854/0xf00 [ 41.785383] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.785760] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.786189] ksys_mmap_pgoff+0x3af/0x500 [ 41.786577] do_syscall_64+0x3f/0x90 [ 41.786939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.787438] RIP: 0033:0x7f1d5af75d82 [ 41.787791] 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 [ 41.789414] RSP: 002b:00007ffd60fa26f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.790112] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d5af75d82 [ 41.790760] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d5a3af000 [ 41.791433] RBP: 00007f1d5a3af000 R08: 0000000000000009 R09: 0000000000001000 [ 41.792100] R10: 0000000000000812 R11: 0000000000000206 R12: 000056506e572ec0 [ 41.792755] R13: 00007ffd60fa2710 R14: 00007ffd60fa2740 R15: 00007ffd60fa2aa0 [ 41.793418] [ 41.793650] [ 41.793813] Allocated by task 213: [ 41.794142] kasan_save_stack+0x22/0x50 [ 41.794526] kasan_set_track+0x25/0x30 [ 41.794910] __kasan_slab_alloc+0x59/0x70 [ 41.795316] kmem_cache_alloc+0x16b/0x370 [ 41.795716] vm_area_dup+0x20/0x160 [ 41.796066] __split_vma+0x170/0x950 [ 41.796423] split_vma+0xc6/0x110 [ 41.796769] mprotect_fixup+0x8d2/0xb30 [ 41.797157] do_mprotect_pkey+0x87e/0xd40 [ 41.797556] __x64_sys_mprotect+0x78/0xc0 [ 41.797958] do_syscall_64+0x3f/0x90 [ 41.798320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.798817] [ 41.798981] Freed by task 213: [ 41.799291] kasan_save_stack+0x22/0x50 [ 41.799681] kasan_set_track+0x25/0x30 [ 41.800060] kasan_save_free_info+0x2b/0x50 [ 41.800464] __kasan_slab_free+0x10a/0x190 [ 41.800874] kmem_cache_free+0x10d/0x4d0 [ 41.801267] rcu_core+0x8c8/0x2860 [ 41.801613] __do_softirq+0x1b7/0x7d4 [ 41.801981] [ 41.802145] Last potentially related work creation: [ 41.802596] kasan_save_stack+0x22/0x50 [ 41.802986] __kasan_record_aux_stack+0x8e/0xa0 [ 41.803444] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.803942] remove_vma+0x139/0x170 [ 41.804287] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.804719] do_vmi_munmap+0x1f1/0x2b0 [ 41.805100] __vm_munmap+0x138/0x3a0 [ 41.805526] __x64_sys_munmap+0x59/0x80 [ 41.805980] do_syscall_64+0x3f/0x90 [ 41.806415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.806972] [ 41.807141] The buggy address belongs to the object at ffff888013a7cd98 [ 41.807141] which belongs to the cache vm_area_struct of size 168 [ 41.808348] The buggy address is located 88 bytes inside of [ 41.808348] freed 168-byte region [ffff888013a7cd98, ffff888013a7ce40) [ 41.809441] [ 41.809611] The buggy address belongs to the physical page: [ 41.810121] page:00000000d9a15537 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13a7c [ 41.810988] memcg:ffff88800eeab101 [ 41.811348] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.811894] page_type: 0xffffffff() [ 41.812247] raw: 0100000000000200 ffff88800879fc80 ffffea000025da80 dead000000000005 [ 41.812967] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeab101 [ 41.813671] page dumped because: kasan: bad access detected [ 41.814180] [ 41.814349] Memory state around the buggy address: [ 41.814795] ffff888013a7cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 41.815464] ffff888013a7cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 41.816127] >ffff888013a7cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 41.816793] ^ [ 41.817419] ffff888013a7ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 41.818076] ffff888013a7ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.818735] ================================================================== [ 41.819534] Disabling lock debugging due to kernel taint [ 43.811664] BUG: Bad rss-counter state mm:00000000d37d8e05 type:MM_FILEPAGES val:33 [ 43.812647] BUG: Bad rss-counter state mm:00000000d37d8e05 type:MM_ANONPAGES val:22 [ 44.274603] BUG: Bad rss-counter state mm:00000000c9b01e0b type:MM_FILEPAGES val:33 [ 44.275628] BUG: Bad rss-counter state mm:00000000c9b01e0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47540' (ECDSA) to the list of known hosts. 2023/06/20 10:14:56 fuzzer started 2023/06/20 10:14:56 dialing manager at localhost:44161 2023/06/20 10:14:56 checking machine... 2023/06/20 10:14:56 checking revisions... [ 44.980630] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:14:56 testing simple program... [ 45.032843] cgroup: Unknown subsys name 'net' [ 45.094658] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:14:44 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=00007ffa04735018 CR3=000000000fff4000 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=75fd8d2384d2729283496c3e1cd03fad XMM02=2c67c8bc2e329bc3000000000011f9b0 XMM03=fb795ef6d65770560000000000123da8 XMM04=0260159db80e061600000000000ae988 XMM05=19e9129bd510f2350000000000133c28 XMM06=95c5382509c513af0000000000132a90 XMM07=e042d86d42eb936e0000000000124028 XMM08=26441e60854681de000000000011fa10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000000e5 RBX=ffff888015953b80 RCX=0000000000000000 RDX=0000000000082cc0 RSI=0000000000000001 RDI=0000000000082cc0 RBP=ffff888008fce280 RSP=ffff8880166a7a58 R8 =0000000000042af0 R9 =0000000000000000 R10=ffffed1002b2a720 R11=ffff888015953900 R12=ffff888015953900 R13=0000000000082cc0 R14=0000000000082cc0 R15=0000000000082cc0 RIP=ffffffff8180c57e 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 00007ff38066d900 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=00007fffaa218000 CR3=000000000fe0e000 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