syzkaller login: [ 47.432148] BUG: Bad rss-counter state mm:00000000160d17fe type:MM_FILEPAGES val:33 [ 47.433337] BUG: Bad rss-counter state mm:00000000160d17fe type:MM_ANONPAGES val:22 [ 47.548698] ================================================================== [ 47.549901] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.551069] Read of size 8 at addr ffff88800ed18d08 by task sshd/220 [ 47.552025] [ 47.552304] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.553406] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.554615] Call Trace: [ 47.555018] [ 47.555372] dump_stack_lvl+0x91/0xf0 [ 47.555979] print_report+0xcc/0x620 [ 47.556581] ? __virt_addr_valid+0x102/0x340 [ 47.557284] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.558055] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.558860] kasan_report+0xbe/0xf0 [ 47.559481] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.560297] vma_interval_tree_remove+0xc75/0xec0 [ 47.561093] vma_prepare+0xc54/0x11a0 [ 47.561725] __split_vma+0x5af/0x950 [ 47.562347] ? __pfx___split_vma+0x10/0x10 [ 47.563042] ? find_held_lock+0x2c/0x110 [ 47.563730] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.564472] ? lock_is_held_type+0x9f/0x120 [ 47.565241] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.565985] ? mtree_range_walk+0x632/0x900 [ 47.566658] ? mas_walk+0x5c7/0x7c0 [ 47.567229] do_vmi_munmap+0x1f1/0x2b0 [ 47.567829] mmap_region+0x1f9/0x2660 [ 47.568415] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.569060] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.569928] ? __pfx_lock_acquire+0x10/0x10 [ 47.570575] ? __pfx_mmap_region+0x10/0x10 [ 47.571216] ? security_mmap_addr+0x7d/0xa0 [ 47.571860] ? get_unmapped_area+0x1f5/0x3f0 [ 47.572529] do_mmap+0x854/0xf00 [ 47.573072] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.573670] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.574357] ksys_mmap_pgoff+0x3af/0x500 [ 47.574972] do_syscall_64+0x3f/0x90 [ 47.575552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.576330] RIP: 0033:0x7fa364c96d82 [ 47.576881] 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 [ 47.578407] RSP: 002b:00007ffded266a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.578975] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa364c96d82 [ 47.579520] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3640d0000 [ 47.580065] RBP: 00007fa3640d0000 R08: 0000000000000009 R09: 0000000000001000 [ 47.580620] R10: 0000000000000812 R11: 0000000000000206 R12: 000055985c79dd90 [ 47.581164] R13: 00007ffded266a70 R14: 00007ffded266aa0 R15: 00007ffded266e00 [ 47.581712] [ 47.581896] [ 47.582029] Allocated by task 213: [ 47.582308] kasan_save_stack+0x22/0x50 [ 47.582633] kasan_set_track+0x25/0x30 [ 47.582948] __kasan_slab_alloc+0x59/0x70 [ 47.583277] kmem_cache_alloc+0x16b/0x370 [ 47.583607] vm_area_dup+0x20/0x160 [ 47.583900] __split_vma+0x170/0x950 [ 47.584202] split_vma+0xc6/0x110 [ 47.584475] mprotect_fixup+0x8d2/0xb30 [ 47.584799] do_mprotect_pkey+0x87e/0xd40 [ 47.585136] __x64_sys_mprotect+0x78/0xc0 [ 47.585473] do_syscall_64+0x3f/0x90 [ 47.585774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.586182] [ 47.586316] Freed by task 213: [ 47.586567] kasan_save_stack+0x22/0x50 [ 47.586886] kasan_set_track+0x25/0x30 [ 47.587199] kasan_save_free_info+0x2b/0x50 [ 47.587536] __kasan_slab_free+0x10a/0x190 [ 47.587875] kmem_cache_free+0x10d/0x4d0 [ 47.588191] rcu_core+0x8c8/0x2860 [ 47.588473] __do_softirq+0x1b7/0x7d4 [ 47.588780] [ 47.588915] Last potentially related work creation: [ 47.589303] kasan_save_stack+0x22/0x50 [ 47.589622] __kasan_record_aux_stack+0x8e/0xa0 [ 47.589993] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.590411] remove_vma+0x139/0x170 [ 47.590702] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.591054] do_vmi_munmap+0x1f1/0x2b0 [ 47.591358] __vm_munmap+0x138/0x3a0 [ 47.591658] __x64_sys_munmap+0x59/0x80 [ 47.591977] do_syscall_64+0x3f/0x90 [ 47.592267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.592670] [ 47.592805] The buggy address belongs to the object at ffff88800ed18cb0 [ 47.592805] which belongs to the cache vm_area_struct of size 168 [ 47.593761] The buggy address is located 88 bytes inside of [ 47.593761] freed 168-byte region [ffff88800ed18cb0, ffff88800ed18d58) [ 47.594678] [ 47.594813] The buggy address belongs to the physical page: [ 47.595244] page:0000000048617b36 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed18 [ 47.595954] memcg:ffff88800de3be01 [ 47.596232] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.596645] page_type: 0xffffffff() [ 47.596942] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 47.597546] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de3be01 [ 47.598136] page dumped because: kasan: bad access detected [ 47.598565] [ 47.598701] Memory state around the buggy address: [ 47.599080] ffff88800ed18c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 47.599636] ffff88800ed18c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 47.600193] >ffff88800ed18d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 47.600737] ^ [ 47.601017] ffff88800ed18d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 47.601558] ffff88800ed18e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 47.602085] ================================================================== [ 47.602729] Disabling lock debugging due to kernel taint [ 49.244884] BUG: Bad rss-counter state mm:00000000534e24b3 type:MM_FILEPAGES val:33 [ 49.245648] BUG: Bad rss-counter state mm:00000000534e24b3 type:MM_ANONPAGES val:22 [ 49.642135] BUG: Bad rss-counter state mm:00000000c36310d1 type:MM_FILEPAGES val:33 [ 49.643249] BUG: Bad rss-counter state mm:00000000c36310d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11542' (ECDSA) to the list of known hosts. 2023/06/20 08:29:54 fuzzer started 2023/06/20 08:29:54 dialing manager at localhost:44161 2023/06/20 08:29:54 checking machine... 2023/06/20 08:29:54 checking revisions... [ 50.394100] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:29:54 testing simple program... [ 50.443547] cgroup: Unknown subsys name 'net' [ 50.504461] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:29:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=1ffff1100d9c1354 RSI=ffff88806ce09fe0 RDI=ffff88806ce09aa0 RBP=ffff88806ce09fe0 RSP=ffff88806ce099f0 R8 =ffffffff864b4f3c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88806ce09fe8 R15=ffff88806ce09a98 RIP=ffffffff81130445 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 00007f91a7172700 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=00007f02b8ffc0b0 CR3=000000001969c000 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=2033353a39323a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a39323a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f083680 RCX=ffff888017a1f408 RDX=ffff888017a1f3e8 RSI=ffff88800f083680 RDI=ffff888017a1f398 RBP=ffff888017a1f3e8 RSP=ffff888017a1f358 R8 =0000000000000002 R9 =0000000000000000 R10=ffff888017a1f3e8 R11=00000000000b6996 R12=ffff888017a1f398 R13=ffff888017a1f410 R14=ffff888017a1f430 R15=ffff888017a1f3e8 RIP=ffffffff8450808e RFL=00000282 [--S----] 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 00007f02b8a44900 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=00007ffef94df000 CR3=00000000147fc000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000