syzkaller login: [ 32.150757] BUG: Bad rss-counter state mm:00000000bf12c1a9 type:MM_FILEPAGES val:33 [ 32.152147] BUG: Bad rss-counter state mm:00000000bf12c1a9 type:MM_ANONPAGES val:22 [ 32.297469] ================================================================== [ 32.298371] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.299302] Read of size 8 at addr ffff888015c60140 by task sshd/221 [ 32.300173] [ 32.300397] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.301270] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.302252] Call Trace: [ 32.302572] [ 32.302853] dump_stack_lvl+0x91/0xf0 [ 32.303337] print_report+0xcc/0x620 [ 32.303817] ? __virt_addr_valid+0x102/0x340 [ 32.304364] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.304973] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.305596] kasan_report+0xbe/0xf0 [ 32.306066] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.306682] vma_interval_tree_remove+0xc75/0xec0 [ 32.307278] vma_prepare+0xc54/0x11a0 [ 32.307764] __split_vma+0x5af/0x950 [ 32.308235] ? __pfx___split_vma+0x10/0x10 [ 32.308760] ? find_held_lock+0x2c/0x110 [ 32.309310] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.309875] ? lock_is_held_type+0x9f/0x120 [ 32.310419] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.311023] ? mtree_range_walk+0x632/0x900 [ 32.311569] ? mas_walk+0x5c7/0x7c0 [ 32.312045] do_vmi_munmap+0x1f1/0x2b0 [ 32.312538] mmap_region+0x1f9/0x2660 [ 32.313024] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.313615] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.314323] ? __pfx_lock_acquire+0x10/0x10 [ 32.314851] ? __pfx_mmap_region+0x10/0x10 [ 32.315372] ? security_mmap_addr+0x7d/0xa0 [ 32.315911] ? get_unmapped_area+0x1f5/0x3f0 [ 32.316462] do_mmap+0x854/0xf00 [ 32.316896] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.317420] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.317984] ksys_mmap_pgoff+0x3af/0x500 [ 32.318500] do_syscall_64+0x3f/0x90 [ 32.318988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.319636] RIP: 0033:0x7faafa077d82 [ 32.320092] 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 [ 32.322242] RSP: 002b:00007fffcc9e63a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.323151] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faafa077d82 [ 32.323997] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faaf94b1000 [ 32.324841] RBP: 00007faaf94b1000 R08: 0000000000000009 R09: 0000000000001000 [ 32.325695] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0118ecf70 [ 32.326553] R13: 00007fffcc9e63c0 R14: 00007fffcc9e63f0 R15: 00007fffcc9e6750 [ 32.327411] [ 32.327714] [ 32.327926] Allocated by task 213: [ 32.328354] kasan_save_stack+0x22/0x50 [ 32.328854] kasan_set_track+0x25/0x30 [ 32.329363] __kasan_slab_alloc+0x59/0x70 [ 32.329895] kmem_cache_alloc+0x16b/0x370 [ 32.330417] vm_area_dup+0x20/0x160 [ 32.330875] __split_vma+0x170/0x950 [ 32.331339] split_vma+0xc6/0x110 [ 32.331774] mprotect_fixup+0x8d2/0xb30 [ 32.332282] do_mprotect_pkey+0x87e/0xd40 [ 32.332811] __x64_sys_mprotect+0x78/0xc0 [ 32.333345] do_syscall_64+0x3f/0x90 [ 32.333821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.334457] [ 32.334672] Freed by task 213: [ 32.335072] kasan_save_stack+0x22/0x50 [ 32.335569] kasan_set_track+0x25/0x30 [ 32.336058] kasan_save_free_info+0x2b/0x50 [ 32.336589] __kasan_slab_free+0x10a/0x190 [ 32.337133] kmem_cache_free+0x10d/0x4d0 [ 32.337639] rcu_core+0x8c8/0x2860 [ 32.338087] __do_softirq+0x1b7/0x7d4 [ 32.338571] [ 32.338784] Last potentially related work creation: [ 32.339362] kasan_save_stack+0x22/0x50 [ 32.339867] __kasan_record_aux_stack+0x8e/0xa0 [ 32.340454] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.341112] remove_vma+0x139/0x170 [ 32.341566] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.342121] do_vmi_munmap+0x1f1/0x2b0 [ 32.342606] __vm_munmap+0x138/0x3a0 [ 32.343070] __x64_sys_munmap+0x59/0x80 [ 32.343566] do_syscall_64+0x3f/0x90 [ 32.344042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.344687] [ 32.344904] The buggy address belongs to the object at ffff888015c600e8 [ 32.344904] which belongs to the cache vm_area_struct of size 168 [ 32.346390] The buggy address is located 88 bytes inside of [ 32.346390] freed 168-byte region [ffff888015c600e8, ffff888015c60190) [ 32.347805] [ 32.348029] The buggy address belongs to the physical page: [ 32.348685] page:0000000062adab8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c60 [ 32.349771] memcg:ffff88800ef92301 [ 32.350192] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.350835] page_type: 0xffffffff() [ 32.351286] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.352192] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef92301 [ 32.353104] page dumped because: kasan: bad access detected [ 32.353759] [ 32.353973] Memory state around the buggy address: [ 32.354549] ffff888015c60000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.355397] ffff888015c60080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.356243] >ffff888015c60100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.357103] ^ [ 32.357750] ffff888015c60180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.358604] ffff888015c60200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.359452] ================================================================== [ 32.360559] Disabling lock debugging due to kernel taint [ 34.465451] BUG: Bad rss-counter state mm:00000000d8e8eafa type:MM_FILEPAGES val:33 [ 34.466431] BUG: Bad rss-counter state mm:00000000d8e8eafa type:MM_ANONPAGES val:22 [ 34.938793] BUG: Bad rss-counter state mm:00000000bbf39e63 type:MM_FILEPAGES val:33 [ 34.939726] BUG: Bad rss-counter state mm:00000000bbf39e63 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17156' (ECDSA) to the list of known hosts. 2023/06/19 23:06:12 fuzzer started 2023/06/19 23:06:12 dialing manager at localhost:44161 2023/06/19 23:06:12 checking machine... 2023/06/19 23:06:12 checking revisions... [ 35.566612] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:06:12 testing simple program... [ 35.616506] cgroup: Unknown subsys name 'net' [ 35.658667] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:06:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fc6c66385c0 CR3=000000000e4a0000 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=2031313a36303a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a36303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e134a RSI=ffffffff83641221 RDI=ffff88806cf09a50 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000008aab2 R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff88800e82d1c0 R15=ffff88806cf09a50 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007f08baa0e900 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=00007fffebf17000 CR3=000000000c566000 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=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