syzkaller login: [ 30.890770] BUG: Bad rss-counter state mm:00000000389b4f28 type:MM_FILEPAGES val:33 [ 30.891787] BUG: Bad rss-counter state mm:00000000389b4f28 type:MM_ANONPAGES val:22 [ 31.047067] ================================================================== [ 31.048001] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.048936] Read of size 8 at addr ffff88800f1334e0 by task sshd/220 [ 31.049708] [ 31.049927] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.050906] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.051927] Call Trace: [ 31.052258] [ 31.052547] dump_stack_lvl+0x91/0xf0 [ 31.053052] print_report+0xcc/0x620 [ 31.053544] ? __virt_addr_valid+0x102/0x340 [ 31.054133] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.054766] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.055397] kasan_report+0xbe/0xf0 [ 31.055873] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.056509] vma_interval_tree_remove+0xc75/0xec0 [ 31.057123] vma_prepare+0xc54/0x11a0 [ 31.057622] __split_vma+0x5af/0x950 [ 31.058108] ? __pfx___split_vma+0x10/0x10 [ 31.058654] ? find_held_lock+0x2c/0x110 [ 31.059191] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.059767] ? lock_is_held_type+0x9f/0x120 [ 31.060336] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.060978] ? mtree_range_walk+0x632/0x900 [ 31.061568] ? mas_walk+0x5c7/0x7c0 [ 31.062077] do_vmi_munmap+0x1f1/0x2b0 [ 31.062588] mmap_region+0x1f9/0x2660 [ 31.063083] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.063606] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.064323] ? __pfx_lock_acquire+0x10/0x10 [ 31.064899] ? __pfx_mmap_region+0x10/0x10 [ 31.065465] ? security_mmap_addr+0x7d/0xa0 [ 31.066021] ? get_unmapped_area+0x1f5/0x3f0 [ 31.066576] do_mmap+0x854/0xf00 [ 31.067076] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.067665] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.068324] ksys_mmap_pgoff+0x3af/0x500 [ 31.068843] do_syscall_64+0x3f/0x90 [ 31.069341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.069988] RIP: 0033:0x7fc64e0a3d82 [ 31.070465] 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 [ 31.072610] RSP: 002b:00007ffe56f8bb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.073531] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc64e0a3d82 [ 31.074423] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc64d4dd000 [ 31.075280] RBP: 00007fc64d4dd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.076145] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e6673a6b20 [ 31.077020] R13: 00007ffe56f8bb80 R14: 00007ffe56f8bbb0 R15: 00007ffe56f8bf10 [ 31.077893] [ 31.078212] [ 31.078432] Allocated by task 213: [ 31.078882] kasan_save_stack+0x22/0x50 [ 31.079407] kasan_set_track+0x25/0x30 [ 31.079928] __kasan_slab_alloc+0x59/0x70 [ 31.080484] kmem_cache_alloc+0x16b/0x370 [ 31.081026] vm_area_dup+0x20/0x160 [ 31.081509] __split_vma+0x170/0x950 [ 31.082000] split_vma+0xc6/0x110 [ 31.082464] mprotect_fixup+0x8d2/0xb30 [ 31.082997] do_mprotect_pkey+0x87e/0xd40 [ 31.083542] __x64_sys_mprotect+0x78/0xc0 [ 31.084093] do_syscall_64+0x3f/0x90 [ 31.084596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.085276] [ 31.085502] Freed by task 213: [ 31.085917] kasan_save_stack+0x22/0x50 [ 31.086467] kasan_set_track+0x25/0x30 [ 31.086988] kasan_save_free_info+0x2b/0x50 [ 31.087558] __kasan_slab_free+0x10a/0x190 [ 31.088113] kmem_cache_free+0x10d/0x4d0 [ 31.088658] rcu_core+0x8c8/0x2860 [ 31.089129] __do_softirq+0x1b7/0x7d4 [ 31.089636] [ 31.089859] Last potentially related work creation: [ 31.090484] kasan_save_stack+0x22/0x50 [ 31.091009] __kasan_record_aux_stack+0x8e/0xa0 [ 31.091607] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.092284] remove_vma+0x139/0x170 [ 31.092760] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.093355] do_vmi_munmap+0x1f1/0x2b0 [ 31.093869] __vm_munmap+0x138/0x3a0 [ 31.094369] __x64_sys_munmap+0x59/0x80 [ 31.094898] do_syscall_64+0x3f/0x90 [ 31.095387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.096056] [ 31.096279] Second to last potentially related work creation: [ 31.097001] kasan_save_stack+0x22/0x50 [ 31.097533] __kasan_record_aux_stack+0x8e/0xa0 [ 31.098147] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.098819] remove_vma+0x139/0x170 [ 31.099296] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.099882] do_vmi_munmap+0x1f1/0x2b0 [ 31.100390] mmap_region+0x1f9/0x2660 [ 31.100896] do_mmap+0x854/0xf00 [ 31.101346] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.101865] ksys_mmap_pgoff+0x3af/0x500 [ 31.102411] do_syscall_64+0x3f/0x90 [ 31.102918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.103597] [ 31.103818] The buggy address belongs to the object at ffff88800f133488 [ 31.103818] which belongs to the cache vm_area_struct of size 168 [ 31.105385] The buggy address is located 88 bytes inside of [ 31.105385] freed 168-byte region [ffff88800f133488, ffff88800f133530) [ 31.106875] [ 31.107099] The buggy address belongs to the physical page: [ 31.107796] page:000000000e99a2bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf133 [ 31.108946] memcg:ffff88800e7cff01 [ 31.109397] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.110079] page_type: 0xffffffff() [ 31.110555] raw: 0100000000000200 ffff8880087a0c80 ffffea000037f000 dead000000000008 [ 31.111531] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7cff01 [ 31.112491] page dumped because: kasan: bad access detected [ 31.113179] [ 31.113404] Memory state around the buggy address: [ 31.114026] ffff88800f133380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.114933] ffff88800f133400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.115833] >ffff88800f133480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.116716] ^ [ 31.117521] ffff88800f133500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.118436] ffff88800f133580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.119327] ================================================================== [ 31.120365] Disabling lock debugging due to kernel taint [ 34.016858] BUG: Bad rss-counter state mm:00000000e4b2b7ad type:MM_FILEPAGES val:33 [ 34.018026] BUG: Bad rss-counter state mm:00000000e4b2b7ad type:MM_ANONPAGES val:22 [ 34.565729] BUG: Bad rss-counter state mm:00000000582b46cb type:MM_FILEPAGES val:33 [ 34.566920] BUG: Bad rss-counter state mm:00000000582b46cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27021' (ECDSA) to the list of known hosts. 2023/06/21 01:07:48 fuzzer started 2023/06/21 01:07:49 dialing manager at localhost:36067 2023/06/21 01:07:49 checking machine... 2023/06/21 01:07:49 checking revisions... [ 35.240576] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:07:49 testing simple program... [ 35.292609] cgroup: Unknown subsys name 'net' [ 35.360087] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:07:48 Registers: info registers vcpu 0 RAX=1ffff1100196c493 RBX=ffff88800cb62400 RCX=0000000000000000 RDX=ffff8880146a8000 RSI=ffffffff814d45d9 RDI=ffff88800cb62498 RBP=000000007fff0000 RSP=ffff8880146a7de8 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=000000007fff0000 R13=dffffc0000000000 R14=ffff8880146a7e30 R15=000000007fff0000 RIP=ffffffff814d45ec 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 00007f1bc7171900 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=00007f01de260650 CR3=000000000c49e000 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=2cbb11761483d3c000000000000ae988 XMM05=e972c2ca959eb9de0000000000134528 XMM06=35a11d18d12dad8800000000001332c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fffc94cbcf8 CR3=000000000e480000 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=2038343a37303a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a37303a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000