syzkaller login: [ 30.123387] BUG: Bad rss-counter state mm:000000000306fb5d type:MM_FILEPAGES val:33 [ 30.124745] BUG: Bad rss-counter state mm:000000000306fb5d type:MM_ANONPAGES val:22 [ 30.299484] ================================================================== [ 30.300578] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.301749] Read of size 8 at addr ffff88800de216b0 by task sshd/218 [ 30.302848] [ 30.303110] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.304171] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.305451] Call Trace: [ 30.305848] [ 30.306192] dump_stack_lvl+0x91/0xf0 [ 30.306823] print_report+0xcc/0x620 [ 30.307411] ? __virt_addr_valid+0x102/0x340 [ 30.308081] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.308828] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.309580] kasan_report+0xbe/0xf0 [ 30.310188] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.311017] vma_interval_tree_remove+0xc75/0xec0 [ 30.311843] vma_prepare+0xc54/0x11a0 [ 30.312548] __split_vma+0x5af/0x950 [ 30.313231] ? __pfx___split_vma+0x10/0x10 [ 30.314001] ? find_held_lock+0x2c/0x110 [ 30.314792] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.315506] ? lock_is_held_type+0x9f/0x120 [ 30.316183] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.316935] ? mtree_range_walk+0x632/0x900 [ 30.317620] ? mas_walk+0x5c7/0x7c0 [ 30.318207] do_vmi_munmap+0x1f1/0x2b0 [ 30.318824] mmap_region+0x1f9/0x2660 [ 30.319409] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.320035] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.320898] ? __pfx_lock_acquire+0x10/0x10 [ 30.321544] ? __pfx_mmap_region+0x10/0x10 [ 30.322181] ? security_mmap_addr+0x7d/0xa0 [ 30.322740] ? get_unmapped_area+0x1f5/0x3f0 [ 30.323350] do_mmap+0x854/0xf00 [ 30.323820] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.324322] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.324887] ksys_mmap_pgoff+0x3af/0x500 [ 30.325395] do_syscall_64+0x3f/0x90 [ 30.325883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.326559] RIP: 0033:0x7ff7baea1d82 [ 30.327022] 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 [ 30.329227] RSP: 002b:00007ffed4910d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.330176] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff7baea1d82 [ 30.331121] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff7ba2db000 [ 30.332133] RBP: 00007ff7ba2db000 R08: 0000000000000009 R09: 0000000000001000 [ 30.333112] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558088bddec0 [ 30.333972] R13: 00007ffed4910d30 R14: 00007ffed4910d60 R15: 00007ffed49110c0 [ 30.334863] [ 30.335159] [ 30.335377] Allocated by task 211: [ 30.335815] kasan_save_stack+0x22/0x50 [ 30.336328] kasan_set_track+0x25/0x30 [ 30.336832] __kasan_slab_alloc+0x59/0x70 [ 30.337354] kmem_cache_alloc+0x16b/0x370 [ 30.337880] vm_area_dup+0x20/0x160 [ 30.338355] __split_vma+0x170/0x950 [ 30.338816] split_vma+0xc6/0x110 [ 30.339260] mprotect_fixup+0x8d2/0xb30 [ 30.339771] do_mprotect_pkey+0x87e/0xd40 [ 30.340303] __x64_sys_mprotect+0x78/0xc0 [ 30.340830] do_syscall_64+0x3f/0x90 [ 30.341301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.341951] [ 30.342173] Freed by task 211: [ 30.342593] kasan_save_stack+0x22/0x50 [ 30.343091] kasan_set_track+0x25/0x30 [ 30.343587] kasan_save_free_info+0x2b/0x50 [ 30.344210] __kasan_slab_free+0x10a/0x190 [ 30.344755] kmem_cache_free+0x10d/0x4d0 [ 30.345268] rcu_core+0x8c8/0x2860 [ 30.345717] __do_softirq+0x1b7/0x7d4 [ 30.346198] [ 30.346446] Last potentially related work creation: [ 30.347039] kasan_save_stack+0x22/0x50 [ 30.347544] __kasan_record_aux_stack+0x8e/0xa0 [ 30.348126] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.348771] remove_vma+0x139/0x170 [ 30.349229] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.349796] do_vmi_munmap+0x1f1/0x2b0 [ 30.350304] __vm_munmap+0x138/0x3a0 [ 30.350779] __x64_sys_munmap+0x59/0x80 [ 30.351292] do_syscall_64+0x3f/0x90 [ 30.351781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.352433] [ 30.352652] Second to last potentially related work creation: [ 30.353335] kasan_save_stack+0x22/0x50 [ 30.353842] __kasan_record_aux_stack+0x8e/0xa0 [ 30.354453] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.355105] remove_vma+0x139/0x170 [ 30.355561] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.356128] do_vmi_munmap+0x1f1/0x2b0 [ 30.356620] mmap_region+0x1f9/0x2660 [ 30.357094] do_mmap+0x854/0xf00 [ 30.357529] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.358035] ksys_mmap_pgoff+0x3af/0x500 [ 30.358543] do_syscall_64+0x3f/0x90 [ 30.359021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.359673] [ 30.359886] The buggy address belongs to the object at ffff88800de21658 [ 30.359886] which belongs to the cache vm_area_struct of size 168 [ 30.361375] The buggy address is located 88 bytes inside of [ 30.361375] freed 168-byte region [ffff88800de21658, ffff88800de21700) [ 30.362812] [ 30.363026] The buggy address belongs to the physical page: [ 30.363698] page:000000004707aa91 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde21 [ 30.364775] memcg:ffff88800ef0dd01 [ 30.365203] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.365920] page_type: 0xffffffff() [ 30.366406] raw: 0100000000000200 ffff8880087a0c80 ffffea000025fb80 dead000000000005 [ 30.367344] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef0dd01 [ 30.368260] page dumped because: kasan: bad access detected [ 30.368931] [ 30.369144] Memory state around the buggy address: [ 30.369732] ffff88800de21580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.370619] ffff88800de21600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.371489] >ffff88800de21680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.372357] ^ [ 30.372934] ffff88800de21700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.373779] ffff88800de21780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.374642] ================================================================== [ 30.375596] Disabling lock debugging due to kernel taint [ 32.278541] BUG: Bad rss-counter state mm:000000008546f26e type:MM_FILEPAGES val:33 [ 32.279381] BUG: Bad rss-counter state mm:000000008546f26e type:MM_ANONPAGES val:22 [ 32.834617] BUG: Bad rss-counter state mm:00000000f6bd31f5 type:MM_FILEPAGES val:33 [ 32.835840] BUG: Bad rss-counter state mm:00000000f6bd31f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65067' (ECDSA) to the list of known hosts. 2023/06/21 00:16:16 fuzzer started 2023/06/21 00:16:17 dialing manager at localhost:36067 2023/06/21 00:16:17 checking machine... 2023/06/21 00:16:17 checking revisions... [ 33.621906] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:16:17 testing simple program... [ 33.679130] cgroup: Unknown subsys name 'net' [ 33.752392] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:16:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fa4b667c380 CR3=000000000e8f6000 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=2036313a36313a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a36313a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000b3edc RBX=0000000000000001 RCX=ffffffff844c2a7e RDX=00000000000b3ee5 RSI=0000000000034c2a RDI=ffffffff864ab666 RBP=ffff88801436ed30 RSP=ffff88801436ec68 R8 =ffffffff864ab630 R9 =ffff88801436ed18 R10=0000000000038001 R11=00000000000b3edc R12=ffff88801436ed38 R13=ffff88801436ed20 R14=ffff88801436ed19 R15=ffff88801436ecd8 RIP=ffffffff81130861 RFL=00000297 [--S-APC] 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 00007f8faca34900 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=00007f8fac9ed008 CR3=000000000e59a000 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=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