syzkaller login: [ 30.647908] BUG: Bad rss-counter state mm:00000000c419a214 type:MM_FILEPAGES val:33 [ 30.649403] BUG: Bad rss-counter state mm:00000000c419a214 type:MM_ANONPAGES val:22 [ 30.812110] ================================================================== [ 30.813022] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.813984] Read of size 8 at addr ffff88800cbe14e0 by task sshd/221 [ 30.814752] [ 30.814971] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.815981] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.816972] Call Trace: [ 30.817314] [ 30.817606] dump_stack_lvl+0x91/0xf0 [ 30.818123] print_report+0xcc/0x620 [ 30.818606] ? __virt_addr_valid+0x102/0x340 [ 30.819160] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819779] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.820397] kasan_report+0xbe/0xf0 [ 30.820878] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.821510] vma_interval_tree_remove+0xc75/0xec0 [ 30.822114] vma_prepare+0xc54/0x11a0 [ 30.822596] __split_vma+0x5af/0x950 [ 30.823067] ? __pfx___split_vma+0x10/0x10 [ 30.823600] ? find_held_lock+0x2c/0x110 [ 30.824127] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.824700] ? lock_is_held_type+0x9f/0x120 [ 30.825263] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.825871] ? mtree_range_walk+0x632/0x900 [ 30.826426] ? mas_walk+0x5c7/0x7c0 [ 30.826906] do_vmi_munmap+0x1f1/0x2b0 [ 30.827412] mmap_region+0x1f9/0x2660 [ 30.827904] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.828425] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.829156] ? __pfx_lock_acquire+0x10/0x10 [ 30.829699] ? __pfx_mmap_region+0x10/0x10 [ 30.830234] ? security_mmap_addr+0x7d/0xa0 [ 30.830769] ? get_unmapped_area+0x1f5/0x3f0 [ 30.831330] do_mmap+0x854/0xf00 [ 30.831772] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.832278] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.832842] ksys_mmap_pgoff+0x3af/0x500 [ 30.833356] do_syscall_64+0x3f/0x90 [ 30.833846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.834509] RIP: 0033:0x7f3e5f023d82 [ 30.834968] 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 [ 30.837117] RSP: 002b:00007ffeef31c4e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.838037] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e5f023d82 [ 30.838888] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e5e45d000 [ 30.839733] RBP: 00007f3e5e45d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.840582] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e01aa15b20 [ 30.841438] R13: 00007ffeef31c500 R14: 00007ffeef31c530 R15: 00007ffeef31c890 [ 30.842293] [ 30.842585] [ 30.842802] Allocated by task 214: [ 30.843232] kasan_save_stack+0x22/0x50 [ 30.843736] kasan_set_track+0x25/0x30 [ 30.844233] __kasan_slab_alloc+0x59/0x70 [ 30.844766] kmem_cache_alloc+0x16b/0x370 [ 30.845305] vm_area_dup+0x20/0x160 [ 30.845761] __split_vma+0x170/0x950 [ 30.846232] split_vma+0xc6/0x110 [ 30.846672] mprotect_fixup+0x8d2/0xb30 [ 30.847178] do_mprotect_pkey+0x87e/0xd40 [ 30.847704] __x64_sys_mprotect+0x78/0xc0 [ 30.848219] do_syscall_64+0x3f/0x90 [ 30.848693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849341] [ 30.849554] Freed by task 19: [ 30.849946] kasan_save_stack+0x22/0x50 [ 30.850451] kasan_set_track+0x25/0x30 [ 30.850944] kasan_save_free_info+0x2b/0x50 [ 30.851477] __kasan_slab_free+0x10a/0x190 [ 30.852007] kmem_cache_free+0x10d/0x4d0 [ 30.852517] rcu_core+0x8c8/0x2860 [ 30.852960] __do_softirq+0x1b7/0x7d4 [ 30.853455] [ 30.853675] Last potentially related work creation: [ 30.854253] kasan_save_stack+0x22/0x50 [ 30.854756] __kasan_record_aux_stack+0x8e/0xa0 [ 30.855329] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.855977] remove_vma+0x139/0x170 [ 30.856486] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.857047] do_vmi_munmap+0x1f1/0x2b0 [ 30.857545] __vm_munmap+0x138/0x3a0 [ 30.858016] __x64_sys_munmap+0x59/0x80 [ 30.858514] do_syscall_64+0x3f/0x90 [ 30.858990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.859627] [ 30.859844] Second to last potentially related work creation: [ 30.860531] kasan_save_stack+0x22/0x50 [ 30.861037] __kasan_record_aux_stack+0x8e/0xa0 [ 30.861625] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.862272] remove_vma+0x139/0x170 [ 30.862724] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.863286] do_vmi_munmap+0x1f1/0x2b0 [ 30.863773] mmap_region+0x1f9/0x2660 [ 30.864250] do_mmap+0x854/0xf00 [ 30.864682] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.865175] ksys_mmap_pgoff+0x3af/0x500 [ 30.865683] do_syscall_64+0x3f/0x90 [ 30.866164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866812] [ 30.867028] The buggy address belongs to the object at ffff88800cbe1488 [ 30.867028] which belongs to the cache vm_area_struct of size 168 [ 30.868489] The buggy address is located 88 bytes inside of [ 30.868489] freed 168-byte region [ffff88800cbe1488, ffff88800cbe1530) [ 30.869915] [ 30.870131] The buggy address belongs to the physical page: [ 30.870788] page:00000000d022bea2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbe1 [ 30.871866] memcg:ffff88800d8f6401 [ 30.872295] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.872942] page_type: 0xffffffff() [ 30.873414] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a8a40 dead000000000004 [ 30.874342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8f6401 [ 30.875243] page dumped because: kasan: bad access detected [ 30.875902] [ 30.876122] Memory state around the buggy address: [ 30.876704] ffff88800cbe1380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.877567] ffff88800cbe1400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.878431] >ffff88800cbe1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.879285] ^ [ 30.880039] ffff88800cbe1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.880897] ffff88800cbe1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.881777] ================================================================== [ 30.882898] Disabling lock debugging due to kernel taint [ 32.757098] BUG: Bad rss-counter state mm:00000000cbb79970 type:MM_FILEPAGES val:33 [ 32.758617] BUG: Bad rss-counter state mm:00000000cbb79970 type:MM_ANONPAGES val:22 [ 33.338782] BUG: Bad rss-counter state mm:00000000124c37e5 type:MM_FILEPAGES val:33 [ 33.339973] BUG: Bad rss-counter state mm:00000000124c37e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53193' (ECDSA) to the list of known hosts. 2023/06/20 12:53:19 fuzzer started 2023/06/20 12:53:19 dialing manager at localhost:36067 2023/06/20 12:53:19 checking machine... 2023/06/20 12:53:19 checking revisions... [ 33.961475] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:53:19 testing simple program... [ 34.013429] cgroup: Unknown subsys name 'net' [ 34.056379] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:53:19 Registers: info registers vcpu 0 RAX=0000000000005dee RBX=ffff88800fd22140 RCX=ffffffff8181f603 RDX=ffffed1001fa4429 RSI=0000000000000008 RDI=ffff88800fd22140 RBP=0000000000000002 RSP=ffff88801ccdfc58 R8 =0000000000000001 R9 =ffffed1001fa4428 R10=ffff88800fd22147 R11=00000000000b6d7d R12=ffff88800fd22140 R13=0000000000000002 R14=0000000000000001 R15=ffff88801476e000 RIP=ffffffff8181f60f RFL=00000013 [----A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fed1fc39900 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=00007fed201ee650 CR3=0000000016834000 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=23232323232323232323232323232323 XMM01=000000000000000000000000000000ff XMM02=00000000000000000000000000000000 XMM03=6c756620726568746965202c64656e69 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=6965202c64656e696665642066492023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffccf90d448 CR3=000000000d95e000 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=33353a3231203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323831 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000