syzkaller login: [ 37.291373] BUG: Bad rss-counter state mm:000000002f9f93f2 type:MM_FILEPAGES val:33 [ 37.292587] BUG: Bad rss-counter state mm:000000002f9f93f2 type:MM_ANONPAGES val:22 [ 37.332517] ================================================================== [ 37.333456] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.334575] Read of size 8 at addr ffff88800c6264e0 by task sshd/221 [ 37.335445] [ 37.335733] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.336585] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.337576] Call Trace: [ 37.337910] [ 37.338194] dump_stack_lvl+0x91/0xf0 [ 37.338691] print_report+0xcc/0x620 [ 37.339189] ? __virt_addr_valid+0x102/0x340 [ 37.339739] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.340363] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.340979] kasan_report+0xbe/0xf0 [ 37.341487] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.342109] vma_interval_tree_remove+0xc75/0xec0 [ 37.342702] vma_prepare+0xc54/0x11a0 [ 37.343171] __split_vma+0x5af/0x950 [ 37.343634] ? __pfx___split_vma+0x10/0x10 [ 37.344156] ? find_held_lock+0x2c/0x110 [ 37.344669] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.345235] ? lock_is_held_type+0x9f/0x120 [ 37.345763] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.346357] ? mtree_range_walk+0x632/0x900 [ 37.346896] ? mas_walk+0x5c7/0x7c0 [ 37.347365] do_vmi_munmap+0x1f1/0x2b0 [ 37.347852] mmap_region+0x1f9/0x2660 [ 37.348328] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.348831] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.349553] ? __pfx_lock_acquire+0x10/0x10 [ 37.350077] ? __pfx_mmap_region+0x10/0x10 [ 37.350603] ? security_mmap_addr+0x7d/0xa0 [ 37.351128] ? get_unmapped_area+0x1f5/0x3f0 [ 37.351668] do_mmap+0x854/0xf00 [ 37.352103] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.352595] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.353169] ksys_mmap_pgoff+0x3af/0x500 [ 37.353670] do_syscall_64+0x3f/0x90 [ 37.354142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.354777] RIP: 0033:0x7fce4fe93d82 [ 37.355229] 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 [ 37.357330] RSP: 002b:00007ffc2ad2e738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.358270] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce4fe93d82 [ 37.359160] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce4f2cd000 [ 37.360009] RBP: 00007fce4f2cd000 R08: 0000000000000009 R09: 0000000000001000 [ 37.360860] R10: 0000000000000812 R11: 0000000000000206 R12: 00005637c737ab20 [ 37.361712] R13: 00007ffc2ad2e750 R14: 00007ffc2ad2e780 R15: 00007ffc2ad2eae0 [ 37.362565] [ 37.362858] [ 37.363074] Allocated by task 214: [ 37.363505] kasan_save_stack+0x22/0x50 [ 37.364004] kasan_set_track+0x25/0x30 [ 37.364491] __kasan_slab_alloc+0x59/0x70 [ 37.365030] kmem_cache_alloc+0x16b/0x370 [ 37.365539] vm_area_dup+0x20/0x160 [ 37.365989] __split_vma+0x170/0x950 [ 37.366454] split_vma+0xc6/0x110 [ 37.366891] mprotect_fixup+0x8d2/0xb30 [ 37.367394] do_mprotect_pkey+0x87e/0xd40 [ 37.367915] __x64_sys_mprotect+0x78/0xc0 [ 37.368430] do_syscall_64+0x3f/0x90 [ 37.368902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.369543] [ 37.369756] Freed by task 214: [ 37.370141] kasan_save_stack+0x22/0x50 [ 37.370640] kasan_set_track+0x25/0x30 [ 37.371123] kasan_save_free_info+0x2b/0x50 [ 37.371644] __kasan_slab_free+0x10a/0x190 [ 37.372174] kmem_cache_free+0x10d/0x4d0 [ 37.372676] rcu_core+0x8c8/0x2860 [ 37.373133] __do_softirq+0x1b7/0x7d4 [ 37.373605] [ 37.373820] Last potentially related work creation: [ 37.374406] kasan_save_stack+0x22/0x50 [ 37.374903] __kasan_record_aux_stack+0x8e/0xa0 [ 37.375476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.376109] remove_vma+0x139/0x170 [ 37.376560] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.377200] do_vmi_munmap+0x1f1/0x2b0 [ 37.377679] __vm_munmap+0x138/0x3a0 [ 37.378140] __x64_sys_munmap+0x59/0x80 [ 37.378628] do_syscall_64+0x3f/0x90 [ 37.379103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.379733] [ 37.379944] The buggy address belongs to the object at ffff88800c626488 [ 37.379944] which belongs to the cache vm_area_struct of size 168 [ 37.381412] The buggy address is located 88 bytes inside of [ 37.381412] freed 168-byte region [ffff88800c626488, ffff88800c626530) [ 37.382800] [ 37.383012] The buggy address belongs to the physical page: [ 37.383669] page:00000000dea1298f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc626 [ 37.384761] memcg:ffff8880097ae801 [ 37.385194] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.385830] page_type: 0xffffffff() [ 37.386277] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.387179] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097ae801 [ 37.388073] page dumped because: kasan: bad access detected [ 37.388734] [ 37.388949] Memory state around the buggy address: [ 37.389528] ffff88800c626380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.390378] ffff88800c626400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 37.391225] >ffff88800c626480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.392062] ^ [ 37.392805] ffff88800c626500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 37.393661] ffff88800c626580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.394495] ================================================================== [ 37.395522] Disabling lock debugging due to kernel taint [ 39.342037] BUG: Bad rss-counter state mm:00000000315f0985 type:MM_FILEPAGES val:33 [ 39.342880] BUG: Bad rss-counter state mm:00000000315f0985 type:MM_ANONPAGES val:22 [ 39.812579] BUG: Bad rss-counter state mm:00000000d9354e4e type:MM_FILEPAGES val:33 [ 39.813596] BUG: Bad rss-counter state mm:00000000d9354e4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6045' (ECDSA) to the list of known hosts. 2023/06/20 04:06:34 fuzzer started 2023/06/20 04:06:34 dialing manager at localhost:44161 2023/06/20 04:06:34 checking machine... 2023/06/20 04:06:34 checking revisions... [ 40.557220] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:06:34 testing simple program... [ 40.604157] cgroup: Unknown subsys name 'net' [ 40.648483] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:06:28 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffff888019f16000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff888019f16274 RSP=ffff8880185cfd20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888019f16000 R13=ffffffff87f9478c R14=0000000000000010 R15=0000000000000001 RIP=ffffffff8450bdca RFL=00000286 [--S--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 00007fcf4e621900 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=00007ffd5af23000 CR3=00000000165aa000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f2cbe900800 CR3=000000000e0b2000 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=2034333a36303a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a36303a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000