syzkaller login: [ 31.911335] BUG: Bad rss-counter state mm:000000008e89bb0f type:MM_FILEPAGES val:33 [ 31.912093] BUG: Bad rss-counter state mm:000000008e89bb0f type:MM_ANONPAGES val:22 [ 32.082520] ================================================================== [ 32.083513] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.084552] Read of size 8 at addr ffff88800c573a50 by task sshd/220 [ 32.085582] [ 32.085822] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.086771] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.087868] Call Trace: [ 32.088225] [ 32.088551] dump_stack_lvl+0x91/0xf0 [ 32.089093] print_report+0xcc/0x620 [ 32.089626] ? __virt_addr_valid+0x102/0x340 [ 32.090239] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.090919] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.091600] kasan_report+0xbe/0xf0 [ 32.092126] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.092816] vma_interval_tree_remove+0xc75/0xec0 [ 32.093479] vma_prepare+0xc54/0x11a0 [ 32.094012] __split_vma+0x5af/0x950 [ 32.094533] ? __pfx___split_vma+0x10/0x10 [ 32.095119] ? find_held_lock+0x2c/0x110 [ 32.095694] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.096318] ? lock_is_held_type+0x9f/0x120 [ 32.096936] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.097605] ? mtree_range_walk+0x632/0x900 [ 32.098214] ? mas_walk+0x5c7/0x7c0 [ 32.098735] do_vmi_munmap+0x1f1/0x2b0 [ 32.099286] mmap_region+0x1f9/0x2660 [ 32.099815] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.100382] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.101185] ? __pfx_lock_acquire+0x10/0x10 [ 32.101776] ? __pfx_mmap_region+0x10/0x10 [ 32.102358] ? security_mmap_addr+0x7d/0xa0 [ 32.102941] ? get_unmapped_area+0x1f5/0x3f0 [ 32.103542] do_mmap+0x854/0xf00 [ 32.104012] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.104547] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.105151] ksys_mmap_pgoff+0x3af/0x500 [ 32.105688] do_syscall_64+0x3f/0x90 [ 32.106197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.106883] RIP: 0033:0x7f46e0702d82 [ 32.107370] 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 [ 32.109703] RSP: 002b:00007ffe93d66a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.110662] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46e0702d82 [ 32.111564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f46dfb3c000 [ 32.112472] RBP: 00007f46dfb3c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.113372] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b27583df70 [ 32.114273] R13: 00007ffe93d66a80 R14: 00007ffe93d66ab0 R15: 00007ffe93d66e10 [ 32.115187] [ 32.115497] [ 32.115728] Allocated by task 213: [ 32.116187] kasan_save_stack+0x22/0x50 [ 32.116742] kasan_set_track+0x25/0x30 [ 32.117264] __kasan_slab_alloc+0x59/0x70 [ 32.117823] kmem_cache_alloc+0x16b/0x370 [ 32.118373] vm_area_dup+0x20/0x160 [ 32.118852] __split_vma+0x170/0x950 [ 32.119345] split_vma+0xc6/0x110 [ 32.119813] mprotect_fixup+0x8d2/0xb30 [ 32.120349] do_mprotect_pkey+0x87e/0xd40 [ 32.120919] __x64_sys_mprotect+0x78/0xc0 [ 32.121476] do_syscall_64+0x3f/0x90 [ 32.121982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.122664] [ 32.122893] Freed by task 213: [ 32.123317] kasan_save_stack+0x22/0x50 [ 32.123850] kasan_set_track+0x25/0x30 [ 32.124380] kasan_save_free_info+0x2b/0x50 [ 32.124958] __kasan_slab_free+0x10a/0x190 [ 32.125528] kmem_cache_free+0x10d/0x4d0 [ 32.126077] rcu_core+0x8c8/0x2860 [ 32.126635] __do_softirq+0x1b7/0x7d4 [ 32.127152] [ 32.127384] Last potentially related work creation: [ 32.128024] kasan_save_stack+0x22/0x50 [ 32.128584] __kasan_record_aux_stack+0x8e/0xa0 [ 32.129207] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.129903] remove_vma+0x139/0x170 [ 32.130394] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.130999] do_vmi_munmap+0x1f1/0x2b0 [ 32.131529] __vm_munmap+0x138/0x3a0 [ 32.132037] __x64_sys_munmap+0x59/0x80 [ 32.132583] do_syscall_64+0x3f/0x90 [ 32.133093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.133788] [ 32.134021] The buggy address belongs to the object at ffff88800c5739f8 [ 32.134021] which belongs to the cache vm_area_struct of size 168 [ 32.135623] The buggy address is located 88 bytes inside of [ 32.135623] freed 168-byte region [ffff88800c5739f8, ffff88800c573aa0) [ 32.137146] [ 32.137380] The buggy address belongs to the physical page: [ 32.138092] page:00000000aa3d5f11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc573 [ 32.139274] memcg:ffff88800dc82301 [ 32.139736] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.140443] page_type: 0xffffffff() [ 32.140935] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.141940] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc82301 [ 32.142912] page dumped because: kasan: bad access detected [ 32.143625] [ 32.143858] Memory state around the buggy address: [ 32.144508] ffff88800c573900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.145439] ffff88800c573980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.146368] >ffff88800c573a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.147289] ^ [ 32.148054] ffff88800c573a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.148983] ffff88800c573b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.149916] ================================================================== [ 32.150939] Disabling lock debugging due to kernel taint [ 34.502758] BUG: Bad rss-counter state mm:00000000ccc5795d type:MM_FILEPAGES val:33 [ 34.503929] BUG: Bad rss-counter state mm:00000000ccc5795d type:MM_ANONPAGES val:22 [ 35.014190] BUG: Bad rss-counter state mm:00000000295fcdff type:MM_FILEPAGES val:33 [ 35.015693] BUG: Bad rss-counter state mm:00000000295fcdff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45503' (ECDSA) to the list of known hosts. 2023/06/19 20:03:31 fuzzer started 2023/06/19 20:03:32 dialing manager at localhost:44161 2023/06/19 20:03:32 checking machine... 2023/06/19 20:03:32 checking revisions... [ 35.767314] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:03:32 testing simple program... [ 35.823465] cgroup: Unknown subsys name 'net' [ 35.872709] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:03:31 Registers: info registers vcpu 0 RAX=0000000000000006 RBX=ffffffff85dfcff0 RCX=ffffffff8180f43a RDX=0000000000000006 RSI=ffffffff86137dcc RDI=ffffffff85dfcfd4 RBP=ffffffff85dfcfd4 RSP=ffff88806ce099e0 R8 =ffffffff86137dcc R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffffffff85dfcfec R13=ffffffff85dfcfd4 R14=ffffffff85dfcfd4 R15=dffffc0000000000 RIP=ffffffff8112fc6b RFL=00000206 [-----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 00007f9be3a18900 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=00007f9be3fcd650 CR3=000000001a37c000 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=0000000000000000ffff000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=000055e28be4f000 CR3=000000001a37c000 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=82c770bf62d801a4e9797d6fc564aeb5 XMM02=8d2ce63a2f43a218473c004f8147a191 XMM03=01fb4cd1733cb4344e66ac3887a34bc6 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=00000000001606200000000000027050 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000