syzkaller login: [ 31.547283] BUG: Bad rss-counter state mm:0000000050cefd59 type:MM_FILEPAGES val:33 [ 31.548067] BUG: Bad rss-counter state mm:0000000050cefd59 type:MM_ANONPAGES val:22 [ 31.685063] ================================================================== [ 31.685892] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.686744] Read of size 8 at addr ffff88800c534ed8 by task sshd/220 [ 31.687423] [ 31.687618] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.688391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.689423] Call Trace: [ 31.689709] [ 31.689970] dump_stack_lvl+0x91/0xf0 [ 31.690413] print_report+0xcc/0x620 [ 31.690841] ? __virt_addr_valid+0x102/0x340 [ 31.691352] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.691900] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.692443] kasan_report+0xbe/0xf0 [ 31.692866] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.693417] vma_interval_tree_remove+0xc75/0xec0 [ 31.693948] vma_prepare+0xc54/0x11a0 [ 31.694383] __split_vma+0x5af/0x950 [ 31.694802] ? __pfx___split_vma+0x10/0x10 [ 31.695275] ? find_held_lock+0x2c/0x110 [ 31.695738] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.696243] ? lock_is_held_type+0x9f/0x120 [ 31.696729] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.697267] ? mtree_range_walk+0x632/0x900 [ 31.697754] ? mas_walk+0x5c7/0x7c0 [ 31.698187] do_vmi_munmap+0x1f1/0x2b0 [ 31.698625] mmap_region+0x1f9/0x2660 [ 31.699046] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.699506] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.700155] ? __pfx_lock_acquire+0x10/0x10 [ 31.700627] ? __pfx_mmap_region+0x10/0x10 [ 31.701099] ? security_mmap_addr+0x7d/0xa0 [ 31.701569] ? get_unmapped_area+0x1f5/0x3f0 [ 31.702077] do_mmap+0x854/0xf00 [ 31.702467] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.702914] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.703422] ksys_mmap_pgoff+0x3af/0x500 [ 31.703879] do_syscall_64+0x3f/0x90 [ 31.704304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.704897] RIP: 0033:0x7f2dafff8d82 [ 31.705303] 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 [ 31.707238] RSP: 002b:00007ffe03a6ae68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.708054] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2dafff8d82 [ 31.708809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2daf432000 [ 31.709567] RBP: 00007f2daf432000 R08: 0000000000000009 R09: 0000000000001000 [ 31.710337] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8631d1d90 [ 31.711113] R13: 00007ffe03a6ae80 R14: 00007ffe03a6aeb0 R15: 00007ffe03a6b210 [ 31.711902] [ 31.712171] [ 31.712368] Allocated by task 213: [ 31.712765] kasan_save_stack+0x22/0x50 [ 31.713231] kasan_set_track+0x25/0x30 [ 31.713679] __kasan_slab_alloc+0x59/0x70 [ 31.714156] kmem_cache_alloc+0x16b/0x370 [ 31.714638] vm_area_dup+0x20/0x160 [ 31.715046] __split_vma+0x170/0x950 [ 31.715470] split_vma+0xc6/0x110 [ 31.715884] mprotect_fixup+0x8d2/0xb30 [ 31.716351] do_mprotect_pkey+0x87e/0xd40 [ 31.716821] __x64_sys_mprotect+0x78/0xc0 [ 31.717299] do_syscall_64+0x3f/0x90 [ 31.717732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.718334] [ 31.718531] Freed by task 213: [ 31.718885] kasan_save_stack+0x22/0x50 [ 31.719339] kasan_set_track+0x25/0x30 [ 31.719796] kasan_save_free_info+0x2b/0x50 [ 31.720274] __kasan_slab_free+0x10a/0x190 [ 31.720759] kmem_cache_free+0x10d/0x4d0 [ 31.721219] rcu_core+0x8c8/0x2860 [ 31.721620] __do_softirq+0x1b7/0x7d4 [ 31.722054] [ 31.722248] Last potentially related work creation: [ 31.722779] kasan_save_stack+0x22/0x50 [ 31.723238] __kasan_record_aux_stack+0x8e/0xa0 [ 31.723764] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.724345] remove_vma+0x139/0x170 [ 31.724757] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.725256] do_vmi_munmap+0x1f1/0x2b0 [ 31.725702] __vm_munmap+0x138/0x3a0 [ 31.726155] __x64_sys_munmap+0x59/0x80 [ 31.726603] do_syscall_64+0x3f/0x90 [ 31.727030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.727608] [ 31.727800] The buggy address belongs to the object at ffff88800c534e80 [ 31.727800] which belongs to the cache vm_area_struct of size 168 [ 31.729137] The buggy address is located 88 bytes inside of [ 31.729137] freed 168-byte region [ffff88800c534e80, ffff88800c534f28) [ 31.730497] [ 31.730699] The buggy address belongs to the physical page: [ 31.731296] page:000000001f51f749 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc534 [ 31.732272] memcg:ffff88800c5f0601 [ 31.732653] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.733240] page_type: 0xffffffff() [ 31.733647] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.734489] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5f0601 [ 31.735300] page dumped because: kasan: bad access detected [ 31.735894] [ 31.736086] Memory state around the buggy address: [ 31.736606] ffff88800c534d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.737383] ffff88800c534e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.738166] >ffff88800c534e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.738931] ^ [ 31.739596] ffff88800c534f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.740367] ffff88800c534f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.741134] ================================================================== [ 31.741977] Disabling lock debugging due to kernel taint [ 33.992031] BUG: Bad rss-counter state mm:00000000cae54a92 type:MM_FILEPAGES val:33 [ 33.992952] BUG: Bad rss-counter state mm:00000000cae54a92 type:MM_ANONPAGES val:22 [ 34.403200] BUG: Bad rss-counter state mm:00000000cece15c7 type:MM_FILEPAGES val:33 [ 34.403879] BUG: Bad rss-counter state mm:00000000cece15c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12430' (ECDSA) to the list of known hosts. 2023/06/20 08:31:18 fuzzer started 2023/06/20 08:31:18 dialing manager at localhost:44161 2023/06/20 08:31:18 checking machine... 2023/06/20 08:31:18 checking revisions... [ 34.913849] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:31:18 testing simple program... [ 34.950570] cgroup: Unknown subsys name 'net' [ 34.983237] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:31:17 Registers: info registers vcpu 0 RAX=ffffffff87f94640 RBX=1ffff110028a5f16 RCX=0000000000000007 RDX=1ffffffff0ff2902 RSI=ffffffff8374472d RDI=ffff88801452f8d0 RBP=ffff88801cabb300 RSP=ffff88801452f890 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88801452f8d0 R13=ffff888008f7d000 R14=ffff88800da72780 R15=0000000000000000 RIP=ffffffff8374476d 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 00007f757d93b900 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=00007f757def2618 CR3=000000000ebb6000 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=00000000000000000000000000000000 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 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=00007fe315fc1320 CR3=0000000010256000 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=2037313a31333a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a31333a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000