syzkaller login: [ 28.887200] BUG: Bad rss-counter state mm:0000000029e18a2e type:MM_FILEPAGES val:33 [ 28.888686] BUG: Bad rss-counter state mm:0000000029e18a2e type:MM_ANONPAGES val:22 [ 29.065167] ================================================================== [ 29.066037] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.066904] Read of size 8 at addr ffff88800e381140 by task sshd/220 [ 29.067636] [ 29.067847] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.068664] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.069580] Call Trace: [ 29.069890] [ 29.070170] dump_stack_lvl+0x91/0xf0 [ 29.070634] print_report+0xcc/0x620 [ 29.071095] ? __virt_addr_valid+0x102/0x340 [ 29.071618] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.072201] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.072779] kasan_report+0xbe/0xf0 [ 29.073235] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.073851] vma_interval_tree_remove+0xc75/0xec0 [ 29.074420] vma_prepare+0xc54/0x11a0 [ 29.074877] __split_vma+0x5af/0x950 [ 29.075343] ? __pfx___split_vma+0x10/0x10 [ 29.075876] ? find_held_lock+0x2c/0x110 [ 29.076401] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.076958] ? lock_is_held_type+0x9f/0x120 [ 29.077501] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.078124] ? mtree_range_walk+0x632/0x900 [ 29.078684] ? mas_walk+0x5c7/0x7c0 [ 29.079163] do_vmi_munmap+0x1f1/0x2b0 [ 29.079648] mmap_region+0x1f9/0x2660 [ 29.080122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.080629] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.081337] ? __pfx_lock_acquire+0x10/0x10 [ 29.081869] ? __pfx_mmap_region+0x10/0x10 [ 29.082398] ? security_mmap_addr+0x7d/0xa0 [ 29.082932] ? get_unmapped_area+0x1f5/0x3f0 [ 29.083482] do_mmap+0x854/0xf00 [ 29.083919] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.084408] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.084965] ksys_mmap_pgoff+0x3af/0x500 [ 29.085460] do_syscall_64+0x3f/0x90 [ 29.085954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.086602] RIP: 0033:0x7f6453a65d82 [ 29.087060] 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 [ 29.089179] RSP: 002b:00007ffe11a38358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.090085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6453a65d82 [ 29.090938] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6452e9f000 [ 29.091782] RBP: 00007f6452e9f000 R08: 0000000000000009 R09: 0000000000001000 [ 29.092630] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c1fc08ec0 [ 29.093478] R13: 00007ffe11a38370 R14: 00007ffe11a383a0 R15: 00007ffe11a38700 [ 29.094344] [ 29.094637] [ 29.094850] Allocated by task 213: [ 29.095277] kasan_save_stack+0x22/0x50 [ 29.095778] kasan_set_track+0x25/0x30 [ 29.096264] __kasan_slab_alloc+0x59/0x70 [ 29.096784] kmem_cache_alloc+0x16b/0x370 [ 29.097298] vm_area_dup+0x20/0x160 [ 29.097755] __split_vma+0x170/0x950 [ 29.098237] split_vma+0xc6/0x110 [ 29.098673] mprotect_fixup+0x8d2/0xb30 [ 29.099182] do_mprotect_pkey+0x87e/0xd40 [ 29.099697] __x64_sys_mprotect+0x78/0xc0 [ 29.100225] do_syscall_64+0x3f/0x90 [ 29.100702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.101339] [ 29.101553] Freed by task 213: [ 29.101960] kasan_save_stack+0x22/0x50 [ 29.102463] kasan_set_track+0x25/0x30 [ 29.102967] kasan_save_free_info+0x2b/0x50 [ 29.103508] __kasan_slab_free+0x10a/0x190 [ 29.104049] kmem_cache_free+0x10d/0x4d0 [ 29.104560] rcu_core+0x8c8/0x2860 [ 29.105003] __do_softirq+0x1b7/0x7d4 [ 29.105479] [ 29.105692] Last potentially related work creation: [ 29.106285] kasan_save_stack+0x22/0x50 [ 29.106781] __kasan_record_aux_stack+0x8e/0xa0 [ 29.107357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.107999] remove_vma+0x139/0x170 [ 29.108448] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.108989] do_vmi_munmap+0x1f1/0x2b0 [ 29.109466] __vm_munmap+0x138/0x3a0 [ 29.109933] __x64_sys_munmap+0x59/0x80 [ 29.110422] do_syscall_64+0x3f/0x90 [ 29.110895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.111543] [ 29.111755] Second to last potentially related work creation: [ 29.112431] kasan_save_stack+0x22/0x50 [ 29.112936] __kasan_record_aux_stack+0x8e/0xa0 [ 29.113506] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.114170] remove_vma+0x139/0x170 [ 29.114616] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.115167] do_vmi_munmap+0x1f1/0x2b0 [ 29.115648] mmap_region+0x1f9/0x2660 [ 29.116128] do_mmap+0x854/0xf00 [ 29.116556] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.117040] ksys_mmap_pgoff+0x3af/0x500 [ 29.117730] do_syscall_64+0x3f/0x90 [ 29.118214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.118854] [ 29.119070] The buggy address belongs to the object at ffff88800e3810e8 [ 29.119070] which belongs to the cache vm_area_struct of size 168 [ 29.120543] The buggy address is located 88 bytes inside of [ 29.120543] freed 168-byte region [ffff88800e3810e8, ffff88800e381190) [ 29.121984] [ 29.122199] The buggy address belongs to the physical page: [ 29.123003] page:000000003d5b787c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe381 [ 29.124100] memcg:ffff88800e3a2101 [ 29.124523] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.125214] page_type: 0xffffffff() [ 29.125659] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 29.126591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3a2101 [ 29.127486] page dumped because: kasan: bad access detected [ 29.128144] [ 29.128361] Memory state around the buggy address: [ 29.128939] ffff88800e381000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.129798] ffff88800e381080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 29.130674] >ffff88800e381100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.131522] ^ [ 29.132151] ffff88800e381180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 29.133013] ffff88800e381200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 29.133850] ================================================================== [ 29.135277] Disabling lock debugging due to kernel taint [ 31.199547] BUG: Bad rss-counter state mm:00000000982730be type:MM_FILEPAGES val:33 [ 31.201150] BUG: Bad rss-counter state mm:00000000982730be type:MM_ANONPAGES val:22 [ 31.679530] BUG: Bad rss-counter state mm:00000000c8faaf09 type:MM_FILEPAGES val:33 [ 31.681253] BUG: Bad rss-counter state mm:00000000c8faaf09 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43938' (ECDSA) to the list of known hosts. 2023/06/21 02:46:38 fuzzer started 2023/06/21 02:46:38 dialing manager at localhost:36067 2023/06/21 02:46:38 checking machine... 2023/06/21 02:46:38 checking revisions... [ 32.435999] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:46:38 testing simple program... [ 32.490370] cgroup: Unknown subsys name 'net' [ 32.546034] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:46:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c1353 RSI=ffffffff846000aa RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a70 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888014189b40 R15=ffff88806ce09a98 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 00007f907a4c4900 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=00007f907aa7c0b0 CR3=0000000019fac000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007ffdccb24448 CR3=000000000caf6000 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=2037333a36343a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a36343a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000