syzkaller login: [ 45.007173] BUG: Bad rss-counter state mm:00000000e08211b9 type:MM_FILEPAGES val:33 [ 45.008334] BUG: Bad rss-counter state mm:00000000e08211b9 type:MM_ANONPAGES val:22 [ 45.168200] ================================================================== [ 45.169332] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.170507] Read of size 8 at addr ffff888019f57880 by task sshd/218 [ 45.171567] [ 45.171786] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.172648] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.173624] Call Trace: [ 45.173943] [ 45.174229] dump_stack_lvl+0x91/0xf0 [ 45.174751] print_report+0xcc/0x620 [ 45.175241] ? __virt_addr_valid+0x102/0x340 [ 45.175789] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.176411] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.177027] kasan_report+0xbe/0xf0 [ 45.177499] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.178122] vma_interval_tree_remove+0xc75/0xec0 [ 45.178748] vma_prepare+0xc54/0x11a0 [ 45.179225] __split_vma+0x5af/0x950 [ 45.179702] ? __pfx___split_vma+0x10/0x10 [ 45.180234] ? find_held_lock+0x2c/0x110 [ 45.180753] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.181325] ? lock_is_held_type+0x9f/0x120 [ 45.181864] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.182472] ? mtree_range_walk+0x632/0x900 [ 45.183058] ? mas_walk+0x5c7/0x7c0 [ 45.183541] do_vmi_munmap+0x1f1/0x2b0 [ 45.184036] mmap_region+0x1f9/0x2660 [ 45.184520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.185041] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.185757] ? __pfx_lock_acquire+0x10/0x10 [ 45.186292] ? __pfx_mmap_region+0x10/0x10 [ 45.186836] ? security_mmap_addr+0x7d/0xa0 [ 45.187374] ? get_unmapped_area+0x1f5/0x3f0 [ 45.187929] do_mmap+0x854/0xf00 [ 45.188371] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.188864] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.189428] ksys_mmap_pgoff+0x3af/0x500 [ 45.189937] do_syscall_64+0x3f/0x90 [ 45.190417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.191076] RIP: 0033:0x7f6759187d82 [ 45.191543] 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 [ 45.193659] RSP: 002b:00007ffd0bb854a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.194578] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6759187d82 [ 45.195432] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f67585c1000 [ 45.196286] RBP: 00007f67585c1000 R08: 0000000000000009 R09: 0000000000001000 [ 45.197130] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc9e61fb20 [ 45.197974] R13: 00007ffd0bb854c0 R14: 00007ffd0bb854f0 R15: 00007ffd0bb85850 [ 45.198843] [ 45.199135] [ 45.199354] Allocated by task 211: [ 45.199781] kasan_save_stack+0x22/0x50 [ 45.200292] kasan_set_track+0x25/0x30 [ 45.200784] __kasan_slab_alloc+0x59/0x70 [ 45.201312] kmem_cache_alloc+0x16b/0x370 [ 45.201828] vm_area_dup+0x20/0x160 [ 45.202286] __split_vma+0x170/0x950 [ 45.202782] split_vma+0xc6/0x110 [ 45.203228] mprotect_fixup+0x8d2/0xb30 [ 45.203732] do_mprotect_pkey+0x87e/0xd40 [ 45.204257] __x64_sys_mprotect+0x78/0xc0 [ 45.204785] do_syscall_64+0x3f/0x90 [ 45.205260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.205902] [ 45.206121] Freed by task 209: [ 45.206518] kasan_save_stack+0x22/0x50 [ 45.207026] kasan_set_track+0x25/0x30 [ 45.207524] kasan_save_free_info+0x2b/0x50 [ 45.208063] __kasan_slab_free+0x10a/0x190 [ 45.208600] kmem_cache_free+0x10d/0x4d0 [ 45.209107] rcu_core+0x8c8/0x2860 [ 45.209554] __do_softirq+0x1b7/0x7d4 [ 45.210029] [ 45.210243] Last potentially related work creation: [ 45.210841] kasan_save_stack+0x22/0x50 [ 45.211347] __kasan_record_aux_stack+0x8e/0xa0 [ 45.211923] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.212647] remove_vma+0x139/0x170 [ 45.213099] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.213657] do_vmi_munmap+0x1f1/0x2b0 [ 45.214149] __vm_munmap+0x138/0x3a0 [ 45.214625] __x64_sys_munmap+0x59/0x80 [ 45.215127] do_syscall_64+0x3f/0x90 [ 45.215599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.216239] [ 45.216456] The buggy address belongs to the object at ffff888019f57828 [ 45.216456] which belongs to the cache vm_area_struct of size 168 [ 45.217944] The buggy address is located 88 bytes inside of [ 45.217944] freed 168-byte region [ffff888019f57828, ffff888019f578d0) [ 45.219383] [ 45.219600] The buggy address belongs to the physical page: [ 45.220277] page:00000000b0d14eb8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f57 [ 45.221372] memcg:ffff888016807d01 [ 45.221803] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.222456] page_type: 0xffffffff() [ 45.222932] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.223859] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016807d01 [ 45.224773] page dumped because: kasan: bad access detected [ 45.225457] [ 45.225680] Memory state around the buggy address: [ 45.226271] ffff888019f57780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 45.227160] ffff888019f57800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 45.228047] >ffff888019f57880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 45.228928] ^ [ 45.229360] ffff888019f57900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.230242] ffff888019f57980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 45.231137] ================================================================== [ 45.232089] Disabling lock debugging due to kernel taint [ 47.243976] BUG: Bad rss-counter state mm:000000003556631b type:MM_FILEPAGES val:33 [ 47.245022] BUG: Bad rss-counter state mm:000000003556631b type:MM_ANONPAGES val:22 [ 47.789578] BUG: Bad rss-counter state mm:00000000d11220b6 type:MM_FILEPAGES val:33 [ 47.790765] BUG: Bad rss-counter state mm:00000000d11220b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15422' (ECDSA) to the list of known hosts. 2023/06/19 23:34:31 fuzzer started 2023/06/19 23:34:31 dialing manager at localhost:44161 2023/06/19 23:34:32 checking machine... 2023/06/19 23:34:32 checking revisions... [ 48.461319] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:34:32 testing simple program... [ 48.514556] cgroup: Unknown subsys name 'net' [ 48.555578] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:34:16 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=1ffff110028f3e85 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88801479f3f8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000105f0000105f R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180ef1a RFL=00000282 [--S----] 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 00007ff1f9300900 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=00007fff01c83000 CR3=0000000019bb2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f784991ce70 CR3=0000000017ea4000 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=2031333a34333a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a34333a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000