syzkaller login: [ 40.727379] BUG: Bad rss-counter state mm:000000001dce3644 type:MM_FILEPAGES val:33 [ 40.728609] BUG: Bad rss-counter state mm:000000001dce3644 type:MM_ANONPAGES val:22 [ 40.837434] ================================================================== [ 40.838513] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.839241] Read of size 8 at addr ffff8880146216b0 by task sshd/220 [ 40.839943] [ 40.840108] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.840768] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.841521] Call Trace: [ 40.841767] [ 40.842005] dump_stack_lvl+0x91/0xf0 [ 40.842380] print_report+0xcc/0x620 [ 40.842754] ? __virt_addr_valid+0x102/0x340 [ 40.843181] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.843652] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.844124] kasan_report+0xbe/0xf0 [ 40.844487] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.844969] vma_interval_tree_remove+0xc75/0xec0 [ 40.845434] vma_prepare+0xc54/0x11a0 [ 40.845822] __split_vma+0x5af/0x950 [ 40.846184] ? __pfx___split_vma+0x10/0x10 [ 40.846562] ? find_held_lock+0x2c/0x110 [ 40.846904] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.847269] ? lock_is_held_type+0x9f/0x120 [ 40.847621] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.848020] ? mtree_range_walk+0x632/0x900 [ 40.848384] ? mas_walk+0x5c7/0x7c0 [ 40.848694] do_vmi_munmap+0x1f1/0x2b0 [ 40.849015] mmap_region+0x1f9/0x2660 [ 40.849331] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.849669] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.850139] ? __pfx_lock_acquire+0x10/0x10 [ 40.850498] ? __pfx_mmap_region+0x10/0x10 [ 40.850842] ? security_mmap_addr+0x7d/0xa0 [ 40.851183] ? get_unmapped_area+0x1f5/0x3f0 [ 40.851539] do_mmap+0x854/0xf00 [ 40.851826] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.852150] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.852517] ksys_mmap_pgoff+0x3af/0x500 [ 40.852848] do_syscall_64+0x3f/0x90 [ 40.853156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.853593] RIP: 0033:0x7fb9babfcd82 [ 40.853894] 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 [ 40.855305] RSP: 002b:00007ffcd2cb6758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.855902] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9babfcd82 [ 40.856458] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9ba036000 [ 40.857015] RBP: 00007fb9ba036000 R08: 0000000000000009 R09: 0000000000001000 [ 40.857591] R10: 0000000000000812 R11: 0000000000000206 R12: 00005652d924d980 [ 40.858147] R13: 00007ffcd2cb6770 R14: 00007ffcd2cb67a0 R15: 00007ffcd2cb6b00 [ 40.858713] [ 40.858905] [ 40.859042] Allocated by task 213: [ 40.859318] kasan_save_stack+0x22/0x50 [ 40.859647] kasan_set_track+0x25/0x30 [ 40.859967] __kasan_slab_alloc+0x59/0x70 [ 40.860308] kmem_cache_alloc+0x16b/0x370 [ 40.860640] vm_area_dup+0x20/0x160 [ 40.860932] __split_vma+0x170/0x950 [ 40.861233] split_vma+0xc6/0x110 [ 40.861526] mprotect_fixup+0x8d2/0xb30 [ 40.861854] do_mprotect_pkey+0x87e/0xd40 [ 40.862192] __x64_sys_mprotect+0x78/0xc0 [ 40.862530] do_syscall_64+0x3f/0x90 [ 40.862838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.863259] [ 40.863400] Freed by task 213: [ 40.863655] kasan_save_stack+0x22/0x50 [ 40.863988] kasan_set_track+0x25/0x30 [ 40.864306] kasan_save_free_info+0x2b/0x50 [ 40.864648] __kasan_slab_free+0x10a/0x190 [ 40.864996] kmem_cache_free+0x10d/0x4d0 [ 40.865329] rcu_core+0x8c8/0x2860 [ 40.865624] __do_softirq+0x1b7/0x7d4 [ 40.865942] [ 40.866084] Last potentially related work creation: [ 40.866465] kasan_save_stack+0x22/0x50 [ 40.866780] __kasan_record_aux_stack+0x8e/0xa0 [ 40.867137] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.867541] remove_vma+0x139/0x170 [ 40.867823] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.868170] do_vmi_munmap+0x1f1/0x2b0 [ 40.868467] __vm_munmap+0x138/0x3a0 [ 40.868763] __x64_sys_munmap+0x59/0x80 [ 40.869072] do_syscall_64+0x3f/0x90 [ 40.869366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.869782] [ 40.869916] The buggy address belongs to the object at ffff888014621658 [ 40.869916] which belongs to the cache vm_area_struct of size 168 [ 40.870842] The buggy address is located 88 bytes inside of [ 40.870842] freed 168-byte region [ffff888014621658, ffff888014621700) [ 40.871710] [ 40.871845] The buggy address belongs to the physical page: [ 40.872267] page:000000007ae953ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14621 [ 40.872944] memcg:ffff88800eb53c01 [ 40.873209] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.873646] page_type: 0xffffffff() [ 40.873929] raw: 0100000000000200 ffff88800879fc80 ffffea0000392e40 dead000000000003 [ 40.874501] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb53c01 [ 40.875074] page dumped because: kasan: bad access detected [ 40.875484] [ 40.875637] Memory state around the buggy address: [ 40.876024] ffff888014621580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.876591] ffff888014621600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 40.877151] >ffff888014621680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.877718] ^ [ 40.878118] ffff888014621700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 40.878636] ffff888014621780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 40.879140] ================================================================== [ 40.879781] Disabling lock debugging due to kernel taint [ 43.357990] BUG: Bad rss-counter state mm:00000000b73fc29d type:MM_FILEPAGES val:33 [ 43.358973] BUG: Bad rss-counter state mm:00000000b73fc29d type:MM_ANONPAGES val:22 [ 43.798859] BUG: Bad rss-counter state mm:000000005449e7d8 type:MM_FILEPAGES val:33 [ 43.800032] BUG: Bad rss-counter state mm:000000005449e7d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19717' (ECDSA) to the list of known hosts. 2023/06/20 03:03:14 fuzzer started 2023/06/20 03:03:15 dialing manager at localhost:44161 2023/06/20 03:03:15 checking machine... 2023/06/20 03:03:15 checking revisions... [ 44.439151] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:03:15 testing simple program... [ 44.485825] cgroup: Unknown subsys name 'net' [ 44.545269] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:03:12 Registers: info registers vcpu 0 RAX=00000000000000e6 RBX=ffff8880169b3008 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000000 RBP=ffffffff83677d48 RSP=ffff888019a57a48 R8 =0000000000000300 R9 =0000000000000000 R10=ffffed1002d36600 R11=00000000000b6996 R12=ffff8880169b3000 R13=ffff888008fce280 R14=ffffffff83677d48 R15=0000000000000024 RIP=ffffffff8180c580 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 00007f5aaebf5900 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=00007fffcc152000 CR3=0000000019e0a000 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=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 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=0000000000000001 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=00007f896d2e6dc0 CR3=000000000e646000 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=2034313a33303a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a33303a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000