syzkaller login: [ 30.198590] BUG: Bad rss-counter state mm:00000000ed616941 type:MM_FILEPAGES val:33 [ 30.199840] BUG: Bad rss-counter state mm:00000000ed616941 type:MM_ANONPAGES val:22 [ 30.244447] ================================================================== [ 30.245392] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.246593] Read of size 8 at addr ffff88800c452140 by task sshd/220 [ 30.247396] [ 30.247615] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.248502] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.249542] Call Trace: [ 30.249874] [ 30.250202] dump_stack_lvl+0x91/0xf0 [ 30.250716] print_report+0xcc/0x620 [ 30.251254] ? __virt_addr_valid+0x102/0x340 [ 30.251819] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.252483] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.253135] kasan_report+0xbe/0xf0 [ 30.253633] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.254271] vma_interval_tree_remove+0xc75/0xec0 [ 30.254989] vma_prepare+0xc54/0x11a0 [ 30.255596] __split_vma+0x5af/0x950 [ 30.256229] ? __pfx___split_vma+0x10/0x10 [ 30.256772] ? find_held_lock+0x2c/0x110 [ 30.257339] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.257919] ? lock_is_held_type+0x9f/0x120 [ 30.258470] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.259119] ? mtree_range_walk+0x632/0x900 [ 30.259673] ? mas_walk+0x5c7/0x7c0 [ 30.260185] do_vmi_munmap+0x1f1/0x2b0 [ 30.260693] mmap_region+0x1f9/0x2660 [ 30.261202] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.261736] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.262471] ? __pfx_lock_acquire+0x10/0x10 [ 30.263044] ? __pfx_mmap_region+0x10/0x10 [ 30.263586] ? security_mmap_addr+0x7d/0xa0 [ 30.264214] ? get_unmapped_area+0x1f5/0x3f0 [ 30.264925] do_mmap+0x854/0xf00 [ 30.265413] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.265930] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.266507] ksys_mmap_pgoff+0x3af/0x500 [ 30.267048] do_syscall_64+0x3f/0x90 [ 30.267528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.268208] RIP: 0033:0x7fc6387bfd82 [ 30.268679] 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 [ 30.270870] RSP: 002b:00007ffe4b2ae078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.271814] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6387bfd82 [ 30.272767] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc637bf9000 [ 30.273650] RBP: 00007fc637bf9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.274533] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b917eb5b20 [ 30.275415] R13: 00007ffe4b2ae090 R14: 00007ffe4b2ae0c0 R15: 00007ffe4b2ae420 [ 30.276294] [ 30.276595] [ 30.276810] Allocated by task 213: [ 30.277265] kasan_save_stack+0x22/0x50 [ 30.277801] kasan_set_track+0x25/0x30 [ 30.278326] __kasan_slab_alloc+0x59/0x70 [ 30.278852] kmem_cache_alloc+0x16b/0x370 [ 30.279404] vm_area_dup+0x20/0x160 [ 30.279872] __split_vma+0x170/0x950 [ 30.280369] split_vma+0xc6/0x110 [ 30.280811] mprotect_fixup+0x8d2/0xb30 [ 30.281328] do_mprotect_pkey+0x87e/0xd40 [ 30.281862] __x64_sys_mprotect+0x78/0xc0 [ 30.282391] do_syscall_64+0x3f/0x90 [ 30.282871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.283551] [ 30.283766] Freed by task 213: [ 30.284161] kasan_save_stack+0x22/0x50 [ 30.284680] kasan_set_track+0x25/0x30 [ 30.285185] kasan_save_free_info+0x2b/0x50 [ 30.285760] __kasan_slab_free+0x10a/0x190 [ 30.286306] kmem_cache_free+0x10d/0x4d0 [ 30.286820] rcu_core+0x8c8/0x2860 [ 30.287307] __do_softirq+0x1b7/0x7d4 [ 30.287794] [ 30.288009] Last potentially related work creation: [ 30.288597] kasan_save_stack+0x22/0x50 [ 30.289101] __kasan_record_aux_stack+0x8e/0xa0 [ 30.289688] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.290335] remove_vma+0x139/0x170 [ 30.290793] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.291354] do_vmi_munmap+0x1f1/0x2b0 [ 30.291846] __vm_munmap+0x138/0x3a0 [ 30.292314] __x64_sys_munmap+0x59/0x80 [ 30.292818] do_syscall_64+0x3f/0x90 [ 30.293299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.293952] [ 30.294174] The buggy address belongs to the object at ffff88800c4520e8 [ 30.294174] which belongs to the cache vm_area_struct of size 168 [ 30.295652] The buggy address is located 88 bytes inside of [ 30.295652] freed 168-byte region [ffff88800c4520e8, ffff88800c452190) [ 30.297065] [ 30.297279] The buggy address belongs to the physical page: [ 30.297973] page:00000000a0708c65 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc452 [ 30.299058] memcg:ffff8880160a9501 [ 30.299482] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.300182] page_type: 0xffffffff() [ 30.300640] raw: 0100000000000200 ffff88800879fc80 ffffea0000319c80 dead000000000003 [ 30.301568] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880160a9501 [ 30.302478] page dumped because: kasan: bad access detected [ 30.303144] [ 30.303362] Memory state around the buggy address: [ 30.303969] ffff88800c452000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.304837] ffff88800c452080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.305741] >ffff88800c452100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.306603] ^ [ 30.307252] ffff88800c452180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.308128] ffff88800c452200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.309005] ================================================================== [ 30.310307] Disabling lock debugging due to kernel taint [ 32.154595] BUG: Bad rss-counter state mm:00000000ad375c72 type:MM_FILEPAGES val:33 [ 32.156158] BUG: Bad rss-counter state mm:00000000ad375c72 type:MM_ANONPAGES val:22 [ 32.633615] BUG: Bad rss-counter state mm:000000007da42c3d type:MM_FILEPAGES val:33 [ 32.634617] BUG: Bad rss-counter state mm:000000007da42c3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30353' (ECDSA) to the list of known hosts. 2023/06/20 00:29:42 fuzzer started 2023/06/20 00:29:42 dialing manager at localhost:44161 2023/06/20 00:29:42 checking machine... 2023/06/20 00:29:42 checking revisions... [ 33.369664] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:29:42 testing simple program... [ 33.416205] cgroup: Unknown subsys name 'net' [ 33.456938] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:29:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f017850 RCX=0000000000000001 RDX=1ffff11001e02f0b RSI=ffff88800f017cd8 RDI=ffff88800f017858 RBP=ffff88800f017cd8 RSP=ffff88800f0177a8 R8 =ffffffff863dcb3a R9 =ffff88800f017890 R10=0000000000038001 R11=0000000000091be7 R12=0000000000000008 R13=ffff88800f017898 R14=ffff88800f017ce0 R15=ffff88800f017850 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 00007f47befc1900 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=00007ffe0ca19000 CR3=000000000cc4e000 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=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 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=00007fc02fc6e000 CR3=00000000099ea000 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=00000000000000000000000000000000 XMM01=ee5325fae0d699806645f62d21a257cb XMM02=2c67c8bc2e329bc3000000000011ca20 XMM03=fb795ef6d65770560000000000123e88 XMM04=b6d9a25cf94c87ae00000000000ae988 XMM05=2c4b0e11abeb04a400000000001344f0 XMM06=4fda316b135da52b0000000000133918 XMM07=e042d86d42eb936e0000000000124108 XMM08=d48cd3f1c4ba6e84000000000011ca80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000