syzkaller login: [ 31.053914] BUG: Bad rss-counter state mm:00000000bd667276 type:MM_FILEPAGES val:33 [ 31.055162] BUG: Bad rss-counter state mm:00000000bd667276 type:MM_ANONPAGES val:22 [ 31.091770] ================================================================== [ 31.092803] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.093916] Read of size 8 at addr ffff88800e336a50 by task sshd/219 [ 31.094731] [ 31.094954] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.095838] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.096839] Call Trace: [ 31.097169] [ 31.097452] dump_stack_lvl+0x91/0xf0 [ 31.097956] print_report+0xcc/0x620 [ 31.098447] ? __virt_addr_valid+0x102/0x340 [ 31.099010] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.099623] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.100215] kasan_report+0xbe/0xf0 [ 31.100673] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.101266] vma_interval_tree_remove+0xc75/0xec0 [ 31.101869] vma_prepare+0xc54/0x11a0 [ 31.102327] __split_vma+0x5af/0x950 [ 31.102811] ? __pfx___split_vma+0x10/0x10 [ 31.103345] ? find_held_lock+0x2c/0x110 [ 31.103872] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.104431] ? lock_is_held_type+0x9f/0x120 [ 31.104982] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.105590] ? mtree_range_walk+0x632/0x900 [ 31.106165] ? mas_walk+0x5c7/0x7c0 [ 31.106647] do_vmi_munmap+0x1f1/0x2b0 [ 31.107148] mmap_region+0x1f9/0x2660 [ 31.107635] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.108149] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.108876] ? __pfx_lock_acquire+0x10/0x10 [ 31.109416] ? __pfx_mmap_region+0x10/0x10 [ 31.109976] ? security_mmap_addr+0x7d/0xa0 [ 31.110520] ? get_unmapped_area+0x1f5/0x3f0 [ 31.111088] do_mmap+0x854/0xf00 [ 31.111535] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.112035] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.112599] ksys_mmap_pgoff+0x3af/0x500 [ 31.113108] do_syscall_64+0x3f/0x90 [ 31.113598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.114255] RIP: 0033:0x7f7c4d5b1d82 [ 31.114708] 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 [ 31.116865] RSP: 002b:00007ffc6f2aecb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.117791] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c4d5b1d82 [ 31.118645] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c4c9eb000 [ 31.119495] RBP: 00007f7c4c9eb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.120555] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562b050cd90 [ 31.121406] R13: 00007ffc6f2aecd0 R14: 00007ffc6f2aed00 R15: 00007ffc6f2af060 [ 31.122307] [ 31.122605] [ 31.122824] Allocated by task 212: [ 31.123254] kasan_save_stack+0x22/0x50 [ 31.123761] kasan_set_track+0x25/0x30 [ 31.124252] __kasan_slab_alloc+0x59/0x70 [ 31.124769] kmem_cache_alloc+0x16b/0x370 [ 31.125284] vm_area_dup+0x20/0x160 [ 31.125751] __split_vma+0x170/0x950 [ 31.126208] split_vma+0xc6/0x110 [ 31.126647] mprotect_fixup+0x8d2/0xb30 [ 31.127139] do_mprotect_pkey+0x87e/0xd40 [ 31.127651] __x64_sys_mprotect+0x78/0xc0 [ 31.128171] do_syscall_64+0x3f/0x90 [ 31.128651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.129278] [ 31.129490] Freed by task 212: [ 31.129906] kasan_save_stack+0x22/0x50 [ 31.130401] kasan_set_track+0x25/0x30 [ 31.130891] kasan_save_free_info+0x2b/0x50 [ 31.131426] __kasan_slab_free+0x10a/0x190 [ 31.131948] kmem_cache_free+0x10d/0x4d0 [ 31.132450] rcu_core+0x8c8/0x2860 [ 31.132889] __do_softirq+0x1b7/0x7d4 [ 31.133366] [ 31.133585] Last potentially related work creation: [ 31.134184] kasan_save_stack+0x22/0x50 [ 31.134684] __kasan_record_aux_stack+0x8e/0xa0 [ 31.135248] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.135895] remove_vma+0x139/0x170 [ 31.136341] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.136892] do_vmi_munmap+0x1f1/0x2b0 [ 31.137371] __vm_munmap+0x138/0x3a0 [ 31.137916] __x64_sys_munmap+0x59/0x80 [ 31.138496] do_syscall_64+0x3f/0x90 [ 31.139034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.139760] [ 31.140008] The buggy address belongs to the object at ffff88800e3369f8 [ 31.140008] which belongs to the cache vm_area_struct of size 168 [ 31.141714] The buggy address is located 88 bytes inside of [ 31.141714] freed 168-byte region [ffff88800e3369f8, ffff88800e336aa0) [ 31.143349] [ 31.143604] The buggy address belongs to the physical page: [ 31.144369] page:00000000468d2833 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe336 [ 31.145592] memcg:ffff88800fcd0c01 [ 31.146096] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.146830] page_type: 0xffffffff() [ 31.147357] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.148400] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcd0c01 [ 31.149452] page dumped because: kasan: bad access detected [ 31.150226] [ 31.150468] Memory state around the buggy address: [ 31.151123] ffff88800e336900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.152093] ffff88800e336980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.153086] >ffff88800e336a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.154069] ^ [ 31.154875] ffff88800e336a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.155859] ffff88800e336b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.156836] ================================================================== [ 31.158377] Disabling lock debugging due to kernel taint [ 32.932088] BUG: Bad rss-counter state mm:000000006dd8f37d type:MM_FILEPAGES val:33 [ 32.932864] BUG: Bad rss-counter state mm:000000006dd8f37d type:MM_ANONPAGES val:22 [ 33.269803] BUG: Bad rss-counter state mm:00000000210e2797 type:MM_FILEPAGES val:33 [ 33.270453] BUG: Bad rss-counter state mm:00000000210e2797 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11925' (ECDSA) to the list of known hosts. 2023/06/20 09:42:11 fuzzer started 2023/06/20 09:42:11 dialing manager at localhost:44161 2023/06/20 09:42:11 checking machine... 2023/06/20 09:42:11 checking revisions... [ 33.986161] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:42:11 testing simple program... [ 34.031970] cgroup: Unknown subsys name 'net' [ 34.074249] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:42:10 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=00007f0d8b71e000 CR3=0000000019cd2000 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=2030313a32343a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a32343a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85dfc6ac RCX=ffffffff81809910 RDX=0000000000000001 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffffffff85dfc6a4 RSP=ffff8880147af5f8 R8 =ffffffff86137004 R9 =ffff8880147af6f0 R10=0000000000038001 R11=0000000000020cb4 R12=ffffffff85dfc6a8 R13=ffffffff85dfc6a4 R14=ffffffff85dfc6a4 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000257 [---ZAPC] 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 00007f77c8fc5900 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=00007f77c8f8f008 CR3=000000000cb44000 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