syzkaller login: [ 31.273650] BUG: Bad rss-counter state mm:0000000037a80417 type:MM_FILEPAGES val:33 [ 31.274883] BUG: Bad rss-counter state mm:0000000037a80417 type:MM_ANONPAGES val:22 [ 31.311888] ================================================================== [ 31.312995] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.314200] Read of size 8 at addr ffff88800e04adf0 by task sshd/221 [ 31.315146] [ 31.315440] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.316366] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.317476] Call Trace: [ 31.317905] <TASK> [ 31.318221] dump_stack_lvl+0x91/0xf0 [ 31.318804] print_report+0xcc/0x620 [ 31.319357] ? __virt_addr_valid+0x102/0x340 [ 31.320024] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.320737] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.321444] kasan_report+0xbe/0xf0 [ 31.321972] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.322723] vma_interval_tree_remove+0xc75/0xec0 [ 31.323389] vma_prepare+0xc54/0x11a0 [ 31.323970] __split_vma+0x5af/0x950 [ 31.324443] ? __pfx___split_vma+0x10/0x10 [ 31.324982] ? find_held_lock+0x2c/0x110 [ 31.325546] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.326235] ? lock_is_held_type+0x9f/0x120 [ 31.326840] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.327616] ? mtree_range_walk+0x632/0x900 [ 31.328262] ? mas_walk+0x5c7/0x7c0 [ 31.328767] do_vmi_munmap+0x1f1/0x2b0 [ 31.329351] mmap_region+0x1f9/0x2660 [ 31.329844] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.330475] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.331379] ? __pfx_lock_acquire+0x10/0x10 [ 31.332002] ? __pfx_mmap_region+0x10/0x10 [ 31.332532] ? security_mmap_addr+0x7d/0xa0 [ 31.333067] ? get_unmapped_area+0x1f5/0x3f0 [ 31.333629] do_mmap+0x854/0xf00 [ 31.334087] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.334591] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.335173] ksys_mmap_pgoff+0x3af/0x500 [ 31.335696] do_syscall_64+0x3f/0x90 [ 31.336173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.336835] RIP: 0033:0x7faa68362d82 [ 31.337306] 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 [ 31.339493] RSP: 002b:00007fff683b3158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.340417] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa68362d82 [ 31.341277] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa6779c000 [ 31.342156] RBP: 00007faa6779c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.343022] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eba97cdec0 [ 31.343888] R13: 00007fff683b3170 R14: 00007fff683b31a0 R15: 00007fff683b3500 [ 31.344758] </TASK> [ 31.345050] [ 31.345266] Allocated by task 214: [ 31.345706] kasan_save_stack+0x22/0x50 [ 31.346236] kasan_set_track+0x25/0x30 [ 31.346746] __kasan_slab_alloc+0x59/0x70 [ 31.347275] kmem_cache_alloc+0x16b/0x370 [ 31.347808] vm_area_dup+0x20/0x160 [ 31.348262] __split_vma+0x170/0x950 [ 31.348740] split_vma+0xc6/0x110 [ 31.349190] mprotect_fixup+0x8d2/0xb30 [ 31.349712] do_mprotect_pkey+0x87e/0xd40 [ 31.350250] __x64_sys_mprotect+0x78/0xc0 [ 31.350803] do_syscall_64+0x3f/0x90 [ 31.351281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.351937] [ 31.352149] Freed by task 214: [ 31.352544] kasan_save_stack+0x22/0x50 [ 31.353075] kasan_set_track+0x25/0x30 [ 31.353574] kasan_save_free_info+0x2b/0x50 [ 31.354155] __kasan_slab_free+0x10a/0x190 [ 31.354715] kmem_cache_free+0x10d/0x4d0 [ 31.355231] rcu_core+0x8c8/0x2860 [ 31.355689] __do_softirq+0x1b7/0x7d4 [ 31.356166] [ 31.356381] Last potentially related work creation: [ 31.357123] kasan_save_stack+0x22/0x50 [ 31.357793] __kasan_record_aux_stack+0x8e/0xa0 [ 31.358583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.359455] remove_vma+0x139/0x170 [ 31.360069] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.360810] do_vmi_munmap+0x1f1/0x2b0 [ 31.361475] __vm_munmap+0x138/0x3a0 [ 31.362064] __x64_sys_munmap+0x59/0x80 [ 31.362579] do_syscall_64+0x3f/0x90 [ 31.363069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.363736] [ 31.363951] The buggy address belongs to the object at ffff88800e04ad98 [ 31.363951] which belongs to the cache vm_area_struct of size 168 [ 31.365438] The buggy address is located 88 bytes inside of [ 31.365438] freed 168-byte region [ffff88800e04ad98, ffff88800e04ae40) [ 31.366882] [ 31.367098] The buggy address belongs to the physical page: [ 31.367775] page:00000000b719b1a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe04a [ 31.368893] memcg:ffff88800ec3f201 [ 31.369318] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.370001] page_type: 0xffffffff() [ 31.370456] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.371417] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec3f201 [ 31.372340] page dumped because: kasan: bad access detected [ 31.373034] [ 31.373254] Memory state around the buggy address: [ 31.373874] ffff88800e04ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.374754] ffff88800e04ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.375617] >ffff88800e04ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.376471] ^ [ 31.377313] ffff88800e04ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.378195] ffff88800e04ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.379061] ================================================================== [ 31.379992] Disabling lock debugging due to kernel taint [ 34.234337] BUG: Bad rss-counter state mm:0000000012ca0841 type:MM_FILEPAGES val:33 [ 34.235333] BUG: Bad rss-counter state mm:0000000012ca0841 type:MM_ANONPAGES val:22 [ 34.823952] BUG: Bad rss-counter state mm:0000000000f333c9 type:MM_FILEPAGES val:33 [ 34.825134] BUG: Bad rss-counter state mm:0000000000f333c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8325' (ECDSA) to the list of known hosts. 2023/06/20 05:58:53 fuzzer started 2023/06/20 05:58:53 dialing manager at localhost:44161 2023/06/20 05:58:53 checking machine... 2023/06/20 05:58:53 checking revisions... [ 35.506444] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:58:53 testing simple program... [ 35.551785] cgroup: Unknown subsys name 'net' [ 35.591554] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:58:52 Registers: info registers vcpu 0 RAX=ffffffff86136d81 RBX=0000000000000001 RCX=ffffffff86136d7c RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888014687930 RSP=ffff888014687868 R8 =ffffffff86136d80 R9 =ffff888014687918 R10=0000000000038001 R11=0000000000020c48 R12=ffff888014687938 R13=ffff888014687920 R14=ffff888014687919 R15=ffff8880146878d8 RIP=ffffffff81130abc 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 00007f29dc6f6900 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=00007f29dbb30e10 CR3=000000000f0e0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=cd85d653999c1ff300000000000ae988 XMM05=2afd599dea8deb6e0000000000134230 XMM06=e4cb8bb95a7664b60000000000133378 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800eab9600 RCX=0000000000000000 RDX=ffff888016bbb680 RSI=ffffffff8449f0a4 RDI=0000000000000005 RBP=ffff88800eab961c RSP=ffff888016fefce8 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=ffff88800eab9600 R13=ffffed1002dfdfcb R14=ffff88800eab961c R15=ffff888016fefe59 RIP=ffffffff8449f0a8 RFL=00000293 [--S-A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4ef1d48900 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=00007fff26d3d99c CR3=000000000eea8000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000