syzkaller login: [ 36.545240] sshd (212) used greatest stack depth: 24128 bytes left [ 36.547250] BUG: Bad rss-counter state mm:000000003c4b5904 type:MM_FILEPAGES val:33 [ 36.548239] BUG: Bad rss-counter state mm:000000003c4b5904 type:MM_ANONPAGES val:22 [ 36.707225] ================================================================== [ 36.708377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.709764] Read of size 8 at addr ffff88800eec7310 by task sshd/219 [ 36.710620] [ 36.710842] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.711704] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.712726] Call Trace: [ 36.713055] [ 36.713404] dump_stack_lvl+0x91/0xf0 [ 36.714001] print_report+0xcc/0x620 [ 36.714542] ? __virt_addr_valid+0x102/0x340 [ 36.715097] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.715711] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.716341] kasan_report+0xbe/0xf0 [ 36.716827] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.717547] vma_interval_tree_remove+0xc75/0xec0 [ 36.718273] vma_prepare+0xc54/0x11a0 [ 36.718832] __split_vma+0x5af/0x950 [ 36.719364] ? __pfx___split_vma+0x10/0x10 [ 36.719923] ? find_held_lock+0x2c/0x110 [ 36.720527] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.721122] ? lock_is_held_type+0x9f/0x120 [ 36.721754] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.722380] ? mtree_range_walk+0x632/0x900 [ 36.722940] ? mas_walk+0x5c7/0x7c0 [ 36.723417] do_vmi_munmap+0x1f1/0x2b0 [ 36.723915] mmap_region+0x1f9/0x2660 [ 36.724423] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.724938] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.725749] ? __pfx_lock_acquire+0x10/0x10 [ 36.726345] ? __pfx_mmap_region+0x10/0x10 [ 36.726904] ? security_mmap_addr+0x7d/0xa0 [ 36.727436] ? get_unmapped_area+0x1f5/0x3f0 [ 36.727988] do_mmap+0x854/0xf00 [ 36.728443] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.728942] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.729504] ksys_mmap_pgoff+0x3af/0x500 [ 36.730013] do_syscall_64+0x3f/0x90 [ 36.730503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.731152] RIP: 0033:0x7fd7d6f89d82 [ 36.731609] 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 [ 36.734007] RSP: 002b:00007ffd212ce168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.734921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd7d6f89d82 [ 36.735780] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd7d63c3000 [ 36.736647] RBP: 00007fd7d63c3000 R08: 0000000000000009 R09: 0000000000001000 [ 36.737500] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d814dcec0 [ 36.738350] R13: 00007ffd212ce180 R14: 00007ffd212ce1b0 R15: 00007ffd212ce510 [ 36.739282] [ 36.739622] [ 36.739875] Allocated by task 212: [ 36.740379] kasan_save_stack+0x22/0x50 [ 36.740888] kasan_set_track+0x25/0x30 [ 36.741383] __kasan_slab_alloc+0x59/0x70 [ 36.741910] kmem_cache_alloc+0x16b/0x370 [ 36.742493] vm_area_dup+0x20/0x160 [ 36.742949] __split_vma+0x170/0x950 [ 36.743422] split_vma+0xc6/0x110 [ 36.743911] mprotect_fixup+0x8d2/0xb30 [ 36.744456] do_mprotect_pkey+0x87e/0xd40 [ 36.745004] __x64_sys_mprotect+0x78/0xc0 [ 36.745580] do_syscall_64+0x3f/0x90 [ 36.746057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.746828] [ 36.747083] Freed by task 203: [ 36.747574] kasan_save_stack+0x22/0x50 [ 36.748211] kasan_set_track+0x25/0x30 [ 36.748836] kasan_save_free_info+0x2b/0x50 [ 36.749492] __kasan_slab_free+0x10a/0x190 [ 36.750152] kmem_cache_free+0x10d/0x4d0 [ 36.750794] rcu_core+0x8c8/0x2860 [ 36.751367] __do_softirq+0x1b7/0x7d4 [ 36.751971] [ 36.752238] Last potentially related work creation: [ 36.752990] kasan_save_stack+0x22/0x50 [ 36.753611] __kasan_record_aux_stack+0x8e/0xa0 [ 36.754328] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.755126] remove_vma+0x139/0x170 [ 36.755681] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.756382] do_vmi_munmap+0x1f1/0x2b0 [ 36.756971] __vm_munmap+0x138/0x3a0 [ 36.757550] __x64_sys_munmap+0x59/0x80 [ 36.758160] do_syscall_64+0x3f/0x90 [ 36.758748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.759562] [ 36.759828] Second to last potentially related work creation: [ 36.760671] kasan_save_stack+0x22/0x50 [ 36.761289] __kasan_record_aux_stack+0x8e/0xa0 [ 36.761991] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.762781] remove_vma+0x139/0x170 [ 36.763342] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.764025] do_vmi_munmap+0x1f1/0x2b0 [ 36.764647] mmap_region+0x1f9/0x2660 [ 36.765220] do_mmap+0x854/0xf00 [ 36.765742] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.766343] ksys_mmap_pgoff+0x3af/0x500 [ 36.766953] do_syscall_64+0x3f/0x90 [ 36.767537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.768170] [ 36.768399] The buggy address belongs to the object at ffff88800eec72b8 [ 36.768399] which belongs to the cache vm_area_struct of size 168 [ 36.769870] The buggy address is located 88 bytes inside of [ 36.769870] freed 168-byte region [ffff88800eec72b8, ffff88800eec7360) [ 36.771254] [ 36.771464] The buggy address belongs to the physical page: [ 36.772130] page:000000008f696fb7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeec7 [ 36.773220] memcg:ffff88800cae8401 [ 36.773639] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.774337] page_type: 0xffffffff() [ 36.774783] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a7900 dead000000000003 [ 36.775693] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cae8401 [ 36.776610] page dumped because: kasan: bad access detected [ 36.777259] [ 36.777476] Memory state around the buggy address: [ 36.778048] ffff88800eec7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.778901] ffff88800eec7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.779746] >ffff88800eec7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.780595] ^ [ 36.781056] ffff88800eec7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.781902] ffff88800eec7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 36.782745] ================================================================== [ 36.783785] Disabling lock debugging due to kernel taint [ 38.809545] BUG: Bad rss-counter state mm:0000000047471d2d type:MM_FILEPAGES val:33 [ 38.811060] BUG: Bad rss-counter state mm:0000000047471d2d type:MM_ANONPAGES val:22 [ 39.283030] BUG: Bad rss-counter state mm:000000008da9d4cd type:MM_FILEPAGES val:33 [ 39.284008] BUG: Bad rss-counter state mm:000000008da9d4cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46383' (ECDSA) to the list of known hosts. 2023/06/20 20:46:21 fuzzer started 2023/06/20 20:46:22 dialing manager at localhost:36067 2023/06/20 20:46:22 checking machine... 2023/06/20 20:46:22 checking revisions... [ 40.068024] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:46:22 testing simple program... [ 40.121532] cgroup: Unknown subsys name 'net' [ 40.171279] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:46:21 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff8880198e0600 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff8880198e0600 RBP=ffff8880198e0600 RSP=ffff88800b3f7850 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=ffff8880198e0600 R14=ffffffff818be530 R15=ffff88800b3f7b98 RIP=ffffffff8180fea8 RFL=00000046 [---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 00007ff05118c900 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=00007ffe7b79c000 CR3=000000000b2e2000 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=6720646572637465733a4d41503d706f 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f4bb9f12000 CR3=000000000e750000 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=2031323a36343a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a36343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000