syzkaller login: [ 36.514050] BUG: Bad rss-counter state mm:0000000050a18e95 type:MM_FILEPAGES val:33 [ 36.515266] BUG: Bad rss-counter state mm:0000000050a18e95 type:MM_ANONPAGES val:22 [ 36.552919] ================================================================== [ 36.554004] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.555293] Read of size 8 at addr ffff88800e585228 by task sshd/219 [ 36.556202] [ 36.556446] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.557402] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.558522] Call Trace: [ 36.558877] [ 36.559199] dump_stack_lvl+0x91/0xf0 [ 36.559746] print_report+0xcc/0x620 [ 36.560284] ? __virt_addr_valid+0x102/0x340 [ 36.560899] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.561582] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.562272] kasan_report+0xbe/0xf0 [ 36.562818] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.563530] vma_interval_tree_remove+0xc75/0xec0 [ 36.564438] vma_prepare+0xc54/0x11a0 [ 36.564971] __split_vma+0x5af/0x950 [ 36.565497] ? __pfx___split_vma+0x10/0x10 [ 36.566090] ? find_held_lock+0x2c/0x110 [ 36.566711] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.567354] ? lock_is_held_type+0x9f/0x120 [ 36.567963] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.568658] ? mtree_range_walk+0x632/0x900 [ 36.569295] ? mas_walk+0x5c7/0x7c0 [ 36.569842] do_vmi_munmap+0x1f1/0x2b0 [ 36.570417] mmap_region+0x1f9/0x2660 [ 36.570972] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.571561] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.572383] ? __pfx_lock_acquire+0x10/0x10 [ 36.572997] ? __pfx_mmap_region+0x10/0x10 [ 36.573602] ? security_mmap_addr+0x7d/0xa0 [ 36.574212] ? get_unmapped_area+0x1f5/0x3f0 [ 36.574845] do_mmap+0x854/0xf00 [ 36.575351] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.575926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.576573] ksys_mmap_pgoff+0x3af/0x500 [ 36.577158] do_syscall_64+0x3f/0x90 [ 36.577708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.578464] RIP: 0033:0x7f1c07809d82 [ 36.578991] 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 [ 36.581436] RSP: 002b:00007ffd1d8412f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.582492] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c07809d82 [ 36.583471] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c06c43000 [ 36.584448] RBP: 00007f1c06c43000 R08: 0000000000000009 R09: 0000000000001000 [ 36.585411] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564cde7a7d90 [ 36.586399] R13: 00007ffd1d841310 R14: 00007ffd1d841340 R15: 00007ffd1d8416a0 [ 36.587392] [ 36.587727] [ 36.587977] Allocated by task 212: [ 36.588469] kasan_save_stack+0x22/0x50 [ 36.589041] kasan_set_track+0x25/0x30 [ 36.589608] __kasan_slab_alloc+0x59/0x70 [ 36.590222] kmem_cache_alloc+0x16b/0x370 [ 36.590830] vm_area_dup+0x20/0x160 [ 36.591346] __split_vma+0x170/0x950 [ 36.591878] split_vma+0xc6/0x110 [ 36.592385] mprotect_fixup+0x8d2/0xb30 [ 36.592962] do_mprotect_pkey+0x87e/0xd40 [ 36.593552] __x64_sys_mprotect+0x78/0xc0 [ 36.594155] do_syscall_64+0x3f/0x90 [ 36.594702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.595438] [ 36.595684] Freed by task 212: [ 36.596133] kasan_save_stack+0x22/0x50 [ 36.596696] kasan_set_track+0x25/0x30 [ 36.597269] kasan_save_free_info+0x2b/0x50 [ 36.597875] __kasan_slab_free+0x10a/0x190 [ 36.598494] kmem_cache_free+0x10d/0x4d0 [ 36.599083] rcu_core+0x8c8/0x2860 [ 36.599593] __do_softirq+0x1b7/0x7d4 [ 36.600145] [ 36.600396] Last potentially related work creation: [ 36.601070] kasan_save_stack+0x22/0x50 [ 36.601644] __kasan_record_aux_stack+0x8e/0xa0 [ 36.602302] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.603057] remove_vma+0x139/0x170 [ 36.603586] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.604223] do_vmi_munmap+0x1f1/0x2b0 [ 36.604784] __vm_munmap+0x138/0x3a0 [ 36.605321] __x64_sys_munmap+0x59/0x80 [ 36.605887] do_syscall_64+0x3f/0x90 [ 36.606450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.607185] [ 36.607436] Second to last potentially related work creation: [ 36.608220] kasan_save_stack+0x22/0x50 [ 36.608798] __kasan_record_aux_stack+0x8e/0xa0 [ 36.609447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.610196] remove_vma+0x139/0x170 [ 36.610714] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.611353] do_vmi_munmap+0x1f1/0x2b0 [ 36.611911] mmap_region+0x1f9/0x2660 [ 36.612455] do_mmap+0x854/0xf00 [ 36.612949] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.613509] ksys_mmap_pgoff+0x3af/0x500 [ 36.614088] do_syscall_64+0x3f/0x90 [ 36.614642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.615379] [ 36.615621] The buggy address belongs to the object at ffff88800e5851d0 [ 36.615621] which belongs to the cache vm_area_struct of size 168 [ 36.617319] The buggy address is located 88 bytes inside of [ 36.617319] freed 168-byte region [ffff88800e5851d0, ffff88800e585278) [ 36.618946] [ 36.619194] The buggy address belongs to the physical page: [ 36.619949] page:0000000036acc7fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe585 [ 36.621189] memcg:ffff88800d58ce01 [ 36.621674] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.622444] page_type: 0xffffffff() [ 36.622966] raw: 0100000000000200 ffff88800879fc80 ffffea000039de00 dead000000000004 [ 36.624025] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d58ce01 [ 36.625073] page dumped because: kasan: bad access detected [ 36.625821] [ 36.626068] Memory state around the buggy address: [ 36.626748] ffff88800e585100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.627733] ffff88800e585180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.628728] >ffff88800e585200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.629701] ^ [ 36.630343] ffff88800e585280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.631347] ffff88800e585300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.632330] ================================================================== [ 36.633627] Disabling lock debugging due to kernel taint [ 38.881149] BUG: Bad rss-counter state mm:000000004c78d843 type:MM_FILEPAGES val:33 [ 38.882204] BUG: Bad rss-counter state mm:000000004c78d843 type:MM_ANONPAGES val:22 [ 39.280725] BUG: Bad rss-counter state mm:00000000d48f21ac type:MM_FILEPAGES val:33 [ 39.281794] BUG: Bad rss-counter state mm:00000000d48f21ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61555' (ECDSA) to the list of known hosts. 2023/06/20 06:09:55 fuzzer started 2023/06/20 06:09:55 dialing manager at localhost:44161 2023/06/20 06:09:55 checking machine... 2023/06/20 06:09:55 checking revisions... [ 40.011834] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:09:55 testing simple program... [ 40.068807] cgroup: Unknown subsys name 'net' [ 40.128193] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:09:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff860d68f6 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860d68fa R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09b40 R15=ffff88806ce09a98 RIP=ffffffff81130bb0 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 00007f4c4b779900 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=00007ffedb77f000 CR3=000000001bb58000 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=00007fb1ff1b3180 CR3=0000000019524000 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=2035353a39303a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a39303a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000