syzkaller login: [ 59.474508] BUG: Bad rss-counter state mm:000000004f600791 type:MM_FILEPAGES val:33 [ 59.476214] BUG: Bad rss-counter state mm:000000004f600791 type:MM_ANONPAGES val:22 [ 59.638939] ================================================================== [ 59.639884] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.640854] Read of size 8 at addr ffff88800ec25d08 by task sshd/219 [ 59.641633] [ 59.641917] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 59.642788] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.643779] Call Trace: [ 59.644115] [ 59.644400] dump_stack_lvl+0x91/0xf0 [ 59.644904] print_report+0xcc/0x620 [ 59.645394] ? __virt_addr_valid+0x102/0x340 [ 59.645948] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.646576] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.647206] kasan_report+0xbe/0xf0 [ 59.647677] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.648299] vma_interval_tree_remove+0xc75/0xec0 [ 59.648925] vma_prepare+0xc54/0x11a0 [ 59.649409] __split_vma+0x5af/0x950 [ 59.649881] ? __pfx___split_vma+0x10/0x10 [ 59.650416] ? find_held_lock+0x2c/0x110 [ 59.650948] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.651511] ? lock_is_held_type+0x9f/0x120 [ 59.652058] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.652669] ? mtree_range_walk+0x632/0x900 [ 59.653230] ? mas_walk+0x5c7/0x7c0 [ 59.653701] do_vmi_munmap+0x1f1/0x2b0 [ 59.654208] mmap_region+0x1f9/0x2660 [ 59.654695] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.655209] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.655925] ? __pfx_lock_acquire+0x10/0x10 [ 59.656457] ? __pfx_mmap_region+0x10/0x10 [ 59.657010] ? security_mmap_addr+0x7d/0xa0 [ 59.657545] ? get_unmapped_area+0x1f5/0x3f0 [ 59.658100] do_mmap+0x854/0xf00 [ 59.658547] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.659048] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.659622] ksys_mmap_pgoff+0x3af/0x500 [ 59.660139] do_syscall_64+0x3f/0x90 [ 59.660627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.661290] RIP: 0033:0x7f3dcb9d0d82 [ 59.661757] 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 [ 59.663894] RSP: 002b:00007ffcc2cef568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.664806] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3dcb9d0d82 [ 59.665652] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3dcae0a000 [ 59.666498] RBP: 00007f3dcae0a000 R08: 0000000000000009 R09: 0000000000001000 [ 59.667349] R10: 0000000000000812 R11: 0000000000000206 R12: 000055efaa2f1f70 [ 59.668192] R13: 00007ffcc2cef580 R14: 00007ffcc2cef5b0 R15: 00007ffcc2cef910 [ 59.669074] [ 59.669369] [ 59.669584] Allocated by task 212: [ 59.670014] kasan_save_stack+0x22/0x50 [ 59.670515] kasan_set_track+0x25/0x30 [ 59.671012] __kasan_slab_alloc+0x59/0x70 [ 59.671533] kmem_cache_alloc+0x16b/0x370 [ 59.672060] vm_area_dup+0x20/0x160 [ 59.672509] __split_vma+0x170/0x950 [ 59.672989] split_vma+0xc6/0x110 [ 59.673435] mprotect_fixup+0x8d2/0xb30 [ 59.673948] do_mprotect_pkey+0x87e/0xd40 [ 59.674465] __x64_sys_mprotect+0x78/0xc0 [ 59.674992] do_syscall_64+0x3f/0x90 [ 59.675473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.676123] [ 59.676341] Freed by task 212: [ 59.676737] kasan_save_stack+0x22/0x50 [ 59.677266] kasan_set_track+0x25/0x30 [ 59.677760] kasan_save_free_info+0x2b/0x50 [ 59.678291] __kasan_slab_free+0x10a/0x190 [ 59.678829] kmem_cache_free+0x10d/0x4d0 [ 59.679333] rcu_core+0x8c8/0x2860 [ 59.679783] __do_softirq+0x1b7/0x7d4 [ 59.680279] [ 59.680496] Last potentially related work creation: [ 59.681090] kasan_save_stack+0x22/0x50 [ 59.681599] __kasan_record_aux_stack+0x8e/0xa0 [ 59.682171] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.682813] remove_vma+0x139/0x170 [ 59.683273] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.683838] do_vmi_munmap+0x1f1/0x2b0 [ 59.684330] __vm_munmap+0x138/0x3a0 [ 59.684813] __x64_sys_munmap+0x59/0x80 [ 59.685318] do_syscall_64+0x3f/0x90 [ 59.685792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.686440] [ 59.686653] The buggy address belongs to the object at ffff88800ec25cb0 [ 59.686653] which belongs to the cache vm_area_struct of size 168 [ 59.688117] The buggy address is located 88 bytes inside of [ 59.688117] freed 168-byte region [ffff88800ec25cb0, ffff88800ec25d58) [ 59.689534] [ 59.689757] The buggy address belongs to the physical page: [ 59.690412] page:00000000792f38c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec25 [ 59.691490] memcg:ffff88800c522b01 [ 59.691916] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 59.692609] page_type: 0xffffffff() [ 59.693067] raw: 0100000000000200 ffff88800879fc80 ffffea000031de00 dead000000000003 [ 59.693984] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c522b01 [ 59.694902] page dumped because: kasan: bad access detected [ 59.695576] [ 59.695801] Memory state around the buggy address: [ 59.696399] ffff88800ec25c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 59.697285] ffff88800ec25c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 59.698144] >ffff88800ec25d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 59.698995] ^ [ 59.699438] ffff88800ec25d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 59.700294] ffff88800ec25e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 59.701154] ================================================================== [ 59.702116] Disabling lock debugging due to kernel taint [ 61.514894] BUG: Bad rss-counter state mm:00000000aca87512 type:MM_FILEPAGES val:33 [ 61.516066] BUG: Bad rss-counter state mm:00000000aca87512 type:MM_ANONPAGES val:22 [ 61.898177] BUG: Bad rss-counter state mm:000000004ea04aaf type:MM_FILEPAGES val:33 [ 61.898801] BUG: Bad rss-counter state mm:000000004ea04aaf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23979' (ECDSA) to the list of known hosts. 2023/06/20 07:58:09 fuzzer started 2023/06/20 07:58:09 dialing manager at localhost:44161 2023/06/20 07:58:09 checking machine... 2023/06/20 07:58:09 checking revisions... [ 62.569507] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:58:10 testing simple program... [ 62.616131] cgroup: Unknown subsys name 'net' [ 62.652746] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:57:48 Registers: info registers vcpu 0 RAX=ffffffff8609675b RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000000 RSI=1ffffffff0c12ceb RDI=ffffffff85d91630 RBP=ffff8880162c7400 RSP=ffff8880162c72e8 R8 =ffffffff86096756 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff8880162c7408 R13=ffff8880162c73f0 R14=ffff8880162c73e9 R15=ffff8880162c73a8 RIP=ffffffff81130a5b RFL=00000216 [----AP-] 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 00007f3e75f9f900 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=00007f3e75f6e008 CR3=0000000019346000 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=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 info registers vcpu 1 RAX=00000000000000a0 RBX=00000000000000a0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff88800a3b0000 RSP=ffff88800f55f7d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffffed1001476001 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff821927de RFL=00000093 [--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 =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=00007fabaa3d03e0 CR3=00000000192ca000 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=2039303a38353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a38353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000