syzkaller login: [ 183.647130] BUG: Bad rss-counter state mm:00000000276acf14 type:MM_FILEPAGES val:33 [ 183.648463] BUG: Bad rss-counter state mm:00000000276acf14 type:MM_ANONPAGES val:22 [ 183.832397] ================================================================== [ 183.833493] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 183.834640] Read of size 8 at addr ffff88800fd74a50 by task sshd/219 [ 183.835885] [ 183.836137] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 183.837260] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 183.838264] Call Trace: [ 183.838603] [ 183.838884] dump_stack_lvl+0x91/0xf0 [ 183.839372] print_report+0xcc/0x620 [ 183.839889] ? __virt_addr_valid+0x102/0x340 [ 183.840439] ? vma_interval_tree_remove+0xc75/0xec0 [ 183.841093] ? vma_interval_tree_remove+0xc75/0xec0 [ 183.841706] kasan_report+0xbe/0xf0 [ 183.842164] ? vma_interval_tree_remove+0xc75/0xec0 [ 183.842773] vma_interval_tree_remove+0xc75/0xec0 [ 183.843353] vma_prepare+0xc54/0x11a0 [ 183.843837] __split_vma+0x5af/0x950 [ 183.844288] ? __pfx___split_vma+0x10/0x10 [ 183.844861] ? find_held_lock+0x2c/0x110 [ 183.845388] do_vmi_align_munmap+0x2ba/0x11f0 [ 183.845970] ? lock_is_held_type+0x9f/0x120 [ 183.846513] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 183.847128] ? mtree_range_walk+0x632/0x900 [ 183.847705] ? mas_walk+0x5c7/0x7c0 [ 183.848186] do_vmi_munmap+0x1f1/0x2b0 [ 183.848691] mmap_region+0x1f9/0x2660 [ 183.849201] ? vm_mmap_pgoff+0x15c/0x3a0 [ 183.849742] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 183.850461] ? __pfx_lock_acquire+0x10/0x10 [ 183.851018] ? __pfx_mmap_region+0x10/0x10 [ 183.851570] ? security_mmap_addr+0x7d/0xa0 [ 183.852118] ? get_unmapped_area+0x1f5/0x3f0 [ 183.852689] do_mmap+0x854/0xf00 [ 183.853144] vm_mmap_pgoff+0x1a6/0x3a0 [ 183.853664] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 183.854234] ksys_mmap_pgoff+0x3af/0x500 [ 183.854755] do_syscall_64+0x3f/0x90 [ 183.855228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 183.855907] RIP: 0033:0x7f53e13bfd82 [ 183.856377] 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 [ 183.858571] RSP: 002b:00007ffdc6e54fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 183.859475] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53e13bfd82 [ 183.860362] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53e07f9000 [ 183.861229] RBP: 00007f53e07f9000 R08: 0000000000000009 R09: 0000000000001000 [ 183.862122] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9d6f9cd90 [ 183.862984] R13: 00007ffdc6e54fd0 R14: 00007ffdc6e55000 R15: 00007ffdc6e55360 [ 183.863881] [ 183.864179] [ 183.864401] Allocated by task 212: [ 183.864879] kasan_save_stack+0x22/0x50 [ 183.865382] kasan_set_track+0x25/0x30 [ 183.865891] __kasan_slab_alloc+0x59/0x70 [ 183.866417] kmem_cache_alloc+0x16b/0x370 [ 183.866972] vm_area_dup+0x20/0x160 [ 183.867438] __split_vma+0x170/0x950 [ 183.867934] split_vma+0xc6/0x110 [ 183.868375] mprotect_fixup+0x8d2/0xb30 [ 183.868899] do_mprotect_pkey+0x87e/0xd40 [ 183.869423] __x64_sys_mprotect+0x78/0xc0 [ 183.869959] do_syscall_64+0x3f/0x90 [ 183.870431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 183.871099] [ 183.871316] Freed by task 212: [ 183.871733] kasan_save_stack+0x22/0x50 [ 183.872243] kasan_set_track+0x25/0x30 [ 183.872754] kasan_save_free_info+0x2b/0x50 [ 183.873302] __kasan_slab_free+0x10a/0x190 [ 183.873890] kmem_cache_free+0x10d/0x4d0 [ 183.874485] rcu_core+0x8c8/0x2860 [ 183.874926] __do_softirq+0x1b7/0x7d4 [ 183.875385] [ 183.875621] Last potentially related work creation: [ 183.876360] kasan_save_stack+0x22/0x50 [ 183.876851] __kasan_record_aux_stack+0x8e/0xa0 [ 183.877398] __call_rcu_common.constprop.0+0x6a/0xb90 [ 183.878012] remove_vma+0x139/0x170 [ 183.878439] do_vmi_align_munmap+0xd4a/0x11f0 [ 183.879096] do_vmi_munmap+0x1f1/0x2b0 [ 183.879557] __vm_munmap+0x138/0x3a0 [ 183.879997] __x64_sys_munmap+0x59/0x80 [ 183.880468] do_syscall_64+0x3f/0x90 [ 183.880920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 183.881526] [ 183.881732] The buggy address belongs to the object at ffff88800fd749f8 [ 183.881732] which belongs to the cache vm_area_struct of size 168 [ 183.883122] The buggy address is located 88 bytes inside of [ 183.883122] freed 168-byte region [ffff88800fd749f8, ffff88800fd74aa0) [ 183.884478] [ 183.884685] The buggy address belongs to the physical page: [ 183.885347] page:00000000c8b705d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd74 [ 183.886386] memcg:ffff88800fd75401 [ 183.886791] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 183.887460] page_type: 0xffffffff() [ 183.887888] raw: 0100000000000200 ffff88800879fc80 ffffea00003f6040 dead000000000003 [ 183.888762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd75401 [ 183.889647] page dumped because: kasan: bad access detected [ 183.890274] [ 183.890478] Memory state around the buggy address: [ 183.891031] ffff88800fd74900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 183.891854] ffff88800fd74980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 183.892688] >ffff88800fd74a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 183.893518] ^ [ 183.894191] ffff88800fd74a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 183.895004] ffff88800fd74b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 183.895820] ================================================================== [ 183.896789] Disabling lock debugging due to kernel taint [ 185.887324] BUG: Bad rss-counter state mm:000000004e5c7c94 type:MM_FILEPAGES val:33 [ 185.888243] BUG: Bad rss-counter state mm:000000004e5c7c94 type:MM_ANONPAGES val:22 [ 186.402879] BUG: Bad rss-counter state mm:00000000be203f04 type:MM_FILEPAGES val:33 [ 186.404108] BUG: Bad rss-counter state mm:00000000be203f04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30392' (ECDSA) to the list of known hosts. 2023/06/20 05:56:16 fuzzer started 2023/06/20 05:56:16 dialing manager at localhost:44161 2023/06/20 05:56:16 checking machine... 2023/06/20 05:56:16 checking revisions... [ 187.097455] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:56:16 testing simple program... [ 187.141854] cgroup: Unknown subsys name 'net' [ 187.179436] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:53:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801645ff58 RCX=0000000000000000 RDX=ffff888015d39b40 RSI=ffffffff81865581 RDI=ffff88801645ff58 RBP=ffff88801645ff48 RSP=ffff88801645ff20 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88801645ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81865581 RFL=00000293 [--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 00007f1f09f47700 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=00007f707f396618 CR3=000000000c46e000 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=2035313a36353a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a36353a3530203032 XMM08=3d656e696c646d632022656369767265 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=00007f0c0ee6f190 CR3=000000000c73e000 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=00000000000000000000000000000000 XMM01=1b681b675fef9fa8a24a5f60c40c2bab XMM02=000000000012d8a0ec2efd57dc4c00df XMM03=0000000000133ab05ba6259517df5b4d XMM04=e8860ee78d893c3400000000000ae988 XMM05=dfcdbad4f1609c370000000000143260 XMM06=fe0b4123649b8ed60000000000142438 XMM07=e042d86d42eb936e0000000000133d30 XMM08=5ba6259517df5b4d000000000012d900 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000