syzkaller login: [ 40.269328] BUG: Bad rss-counter state mm:0000000056c64e07 type:MM_FILEPAGES val:33 [ 40.270063] BUG: Bad rss-counter state mm:0000000056c64e07 type:MM_ANONPAGES val:22 [ 40.301805] ================================================================== [ 40.302518] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.303311] Read of size 8 at addr ffff888018fdd3f8 by task sshd/219 [ 40.303917] [ 40.304055] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.304709] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.305473] Call Trace: [ 40.305750] [ 40.305950] dump_stack_lvl+0x91/0xf0 [ 40.306325] print_report+0xcc/0x620 [ 40.306685] ? __virt_addr_valid+0x102/0x340 [ 40.307044] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.307471] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.308077] kasan_report+0xbe/0xf0 [ 40.308413] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.308844] vma_interval_tree_remove+0xc75/0xec0 [ 40.309278] vma_prepare+0xc54/0x11a0 [ 40.309714] __split_vma+0x5af/0x950 [ 40.310042] ? __pfx___split_vma+0x10/0x10 [ 40.310493] ? find_held_lock+0x2c/0x110 [ 40.310990] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.311382] ? lock_is_held_type+0x9f/0x120 [ 40.311817] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.312236] ? mtree_range_walk+0x632/0x900 [ 40.312731] ? mas_walk+0x5c7/0x7c0 [ 40.313064] do_vmi_munmap+0x1f1/0x2b0 [ 40.313491] mmap_region+0x1f9/0x2660 [ 40.313964] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.314380] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.314870] ? __pfx_lock_acquire+0x10/0x10 [ 40.315245] ? __pfx_mmap_region+0x10/0x10 [ 40.315605] ? security_mmap_addr+0x7d/0xa0 [ 40.316005] ? get_unmapped_area+0x1f5/0x3f0 [ 40.316389] do_mmap+0x854/0xf00 [ 40.316684] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.317018] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.317403] ksys_mmap_pgoff+0x3af/0x500 [ 40.317762] do_syscall_64+0x3f/0x90 [ 40.318098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.318544] RIP: 0033:0x7f9624197d82 [ 40.318857] 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 [ 40.320362] RSP: 002b:00007ffee8b11528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.320981] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9624197d82 [ 40.321571] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96235d1000 [ 40.322143] RBP: 00007f96235d1000 R08: 0000000000000009 R09: 0000000000001000 [ 40.322715] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d7e2f1f70 [ 40.323300] R13: 00007ffee8b11540 R14: 00007ffee8b11570 R15: 00007ffee8b118d0 [ 40.323923] [ 40.324124] [ 40.324266] Allocated by task 212: [ 40.324552] kasan_save_stack+0x22/0x50 [ 40.324888] kasan_set_track+0x25/0x30 [ 40.325214] __kasan_slab_alloc+0x59/0x70 [ 40.325576] kmem_cache_alloc+0x16b/0x370 [ 40.325917] vm_area_dup+0x20/0x160 [ 40.326229] __split_vma+0x170/0x950 [ 40.326550] split_vma+0xc6/0x110 [ 40.326839] mprotect_fixup+0x8d2/0xb30 [ 40.327179] do_mprotect_pkey+0x87e/0xd40 [ 40.327539] __x64_sys_mprotect+0x78/0xc0 [ 40.327903] do_syscall_64+0x3f/0x90 [ 40.328238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.328677] [ 40.328814] Freed by task 212: [ 40.329096] kasan_save_stack+0x22/0x50 [ 40.329431] kasan_set_track+0x25/0x30 [ 40.329766] kasan_save_free_info+0x2b/0x50 [ 40.330117] __kasan_slab_free+0x10a/0x190 [ 40.330476] kmem_cache_free+0x10d/0x4d0 [ 40.330817] rcu_core+0x8c8/0x2860 [ 40.331128] __do_softirq+0x1b7/0x7d4 [ 40.331444] [ 40.331598] Last potentially related work creation: [ 40.332043] kasan_save_stack+0x22/0x50 [ 40.332385] __kasan_record_aux_stack+0x8e/0xa0 [ 40.332791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.333228] remove_vma+0x139/0x170 [ 40.333534] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.333909] do_vmi_munmap+0x1f1/0x2b0 [ 40.334236] __vm_munmap+0x138/0x3a0 [ 40.334553] __x64_sys_munmap+0x59/0x80 [ 40.334874] do_syscall_64+0x3f/0x90 [ 40.335198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.335672] [ 40.335813] The buggy address belongs to the object at ffff888018fdd3a0 [ 40.335813] which belongs to the cache vm_area_struct of size 168 [ 40.336809] The buggy address is located 88 bytes inside of [ 40.336809] freed 168-byte region [ffff888018fdd3a0, ffff888018fdd448) [ 40.337756] [ 40.337906] The buggy address belongs to the physical page: [ 40.338359] page:00000000ec8bab1a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18fdd [ 40.339108] memcg:ffff888016aa0101 [ 40.339408] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.339897] page_type: 0xffffffff() [ 40.340207] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.340856] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016aa0101 [ 40.341492] page dumped because: kasan: bad access detected [ 40.341946] [ 40.342093] Memory state around the buggy address: [ 40.342507] ffff888018fdd280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 40.343139] ffff888018fdd300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 40.343777] >ffff888018fdd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 40.344379] ^ [ 40.344961] ffff888018fdd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 40.345558] ffff888018fdd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.346156] ================================================================== [ 40.346995] Disabling lock debugging due to kernel taint [ 42.307281] BUG: Bad rss-counter state mm:00000000157ee78b type:MM_FILEPAGES val:33 [ 42.308089] BUG: Bad rss-counter state mm:00000000157ee78b type:MM_ANONPAGES val:22 [ 42.733328] BUG: Bad rss-counter state mm:00000000dfc23fe4 type:MM_FILEPAGES val:33 [ 42.734029] BUG: Bad rss-counter state mm:00000000dfc23fe4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44154' (ECDSA) to the list of known hosts. 2023/06/20 09:49:33 fuzzer started 2023/06/20 09:49:33 dialing manager at localhost:44161 2023/06/20 09:49:33 checking machine... 2023/06/20 09:49:33 checking revisions... [ 43.294907] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:49:34 testing simple program... [ 43.341809] cgroup: Unknown subsys name 'net' [ 43.393663] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:49:23 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=0000000000000000 RCX=0000000000000001 RDX=1ffffd40000dcfe6 RSI=ffffea00006e7fc0 RDI=ffffea00006e7f30 RBP=ffffea00006e7f00 RSP=ffff88806ce09c40 R8 =0000000000000000 R9 =ffff88807ffdc600 R10=ffffea00006e7fb0 R11=000000000001b9fe R12=0000000000000001 R13=ffffea00006e7fc0 R14=ffffea00006e7f80 R15=ffff88807ffdc500 RIP=ffffffff81789b6d RFL=00000046 [---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 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=00007ffdcb27d6c8 CR3=0000000016b56000 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=2033333a39343a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a39343a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800b381a00 RBX=0000000000000009 RCX=ffffffff83872719 RDX=1ffff11001670340 RSI=0000000000000004 RDI=ffff888008c78158 RBP=ffff88800f4ffd90 RSP=ffff88800f4ffc98 R8 =0000000000000000 R9 =ffffed100118f02b R10=ffff888008c7815b R11=00000000000b6996 R12=ffff888008c78158 R13=0000000000000001 R14=ffff8880146cb6b8 R15=0000000000000200 RIP=ffffffff83872788 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 00007f90628fa900 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=00007f9062eb1618 CR3=000000000c640000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000