syzkaller login: [ 38.214356] BUG: Bad rss-counter state mm:0000000092cf9143 type:MM_FILEPAGES val:33 [ 38.215593] BUG: Bad rss-counter state mm:0000000092cf9143 type:MM_ANONPAGES val:22 [ 38.278444] ================================================================== [ 38.279411] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.280499] Read of size 8 at addr ffff88800d88cc20 by task sshd/219 [ 38.281320] [ 38.281553] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.282507] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.283539] Call Trace: [ 38.283887] [ 38.284188] dump_stack_lvl+0x91/0xf0 [ 38.284709] print_report+0xcc/0x620 [ 38.285225] ? __virt_addr_valid+0x102/0x340 [ 38.285822] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.286476] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.287140] kasan_report+0xbe/0xf0 [ 38.287655] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.288320] vma_interval_tree_remove+0xc75/0xec0 [ 38.288957] vma_prepare+0xc54/0x11a0 [ 38.289474] __split_vma+0x5af/0x950 [ 38.289990] ? __pfx___split_vma+0x10/0x10 [ 38.290558] ? find_held_lock+0x2c/0x110 [ 38.291119] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.291725] ? lock_is_held_type+0x9f/0x120 [ 38.292303] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.292954] ? mtree_range_walk+0x632/0x900 [ 38.293543] ? mas_walk+0x5c7/0x7c0 [ 38.294077] do_vmi_munmap+0x1f1/0x2b0 [ 38.294607] mmap_region+0x1f9/0x2660 [ 38.295147] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.295698] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.296463] ? __pfx_lock_acquire+0x10/0x10 [ 38.297032] ? __pfx_mmap_region+0x10/0x10 [ 38.297599] ? security_mmap_addr+0x7d/0xa0 [ 38.298175] ? get_unmapped_area+0x1f5/0x3f0 [ 38.298776] do_mmap+0x854/0xf00 [ 38.299338] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.299973] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.300710] ksys_mmap_pgoff+0x3af/0x500 [ 38.301357] do_syscall_64+0x3f/0x90 [ 38.301989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.302826] RIP: 0033:0x7fd9bc6e6d82 [ 38.303424] 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 [ 38.306255] RSP: 002b:00007ffd007319f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.307449] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9bc6e6d82 [ 38.308581] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9bbb20000 [ 38.309715] RBP: 00007fd9bbb20000 R08: 0000000000000009 R09: 0000000000001000 [ 38.310696] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564104415ec0 [ 38.311824] R13: 00007ffd00731a10 R14: 00007ffd00731a40 R15: 00007ffd00731da0 [ 38.312967] [ 38.313348] [ 38.313638] Allocated by task 212: [ 38.314194] kasan_save_stack+0x22/0x50 [ 38.314850] kasan_set_track+0x25/0x30 [ 38.315479] __kasan_slab_alloc+0x59/0x70 [ 38.316153] kmem_cache_alloc+0x16b/0x370 [ 38.316824] vm_area_dup+0x20/0x160 [ 38.317415] __split_vma+0x170/0x950 [ 38.318019] split_vma+0xc6/0x110 [ 38.318586] mprotect_fixup+0x8d2/0xb30 [ 38.319227] do_mprotect_pkey+0x87e/0xd40 [ 38.319896] __x64_sys_mprotect+0x78/0xc0 [ 38.320568] do_syscall_64+0x3f/0x90 [ 38.321169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.322011] [ 38.322288] Freed by task 212: [ 38.322793] kasan_save_stack+0x22/0x50 [ 38.323432] kasan_set_track+0x25/0x30 [ 38.324052] kasan_save_free_info+0x2b/0x50 [ 38.324731] __kasan_slab_free+0x10a/0x190 [ 38.325417] kmem_cache_free+0x10d/0x4d0 [ 38.326086] rcu_core+0x8c8/0x2860 [ 38.326655] __do_softirq+0x1b7/0x7d4 [ 38.327268] [ 38.327542] Last potentially related work creation: [ 38.328303] kasan_save_stack+0x22/0x50 [ 38.328948] __kasan_record_aux_stack+0x8e/0xa0 [ 38.329706] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.330543] remove_vma+0x139/0x170 [ 38.331121] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.331821] do_vmi_munmap+0x1f1/0x2b0 [ 38.332351] __vm_munmap+0x138/0x3a0 [ 38.332874] __x64_sys_munmap+0x59/0x80 [ 38.333510] do_syscall_64+0x3f/0x90 [ 38.334127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.334948] [ 38.335223] Second to last potentially related work creation: [ 38.336111] kasan_save_stack+0x22/0x50 [ 38.336750] __kasan_record_aux_stack+0x8e/0xa0 [ 38.337491] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.338337] remove_vma+0x139/0x170 [ 38.338923] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.339647] do_vmi_munmap+0x1f1/0x2b0 [ 38.340271] mmap_region+0x1f9/0x2660 [ 38.340882] do_mmap+0x854/0xf00 [ 38.341432] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.342068] ksys_mmap_pgoff+0x3af/0x500 [ 38.342717] do_syscall_64+0x3f/0x90 [ 38.343316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.344133] [ 38.344403] The buggy address belongs to the object at ffff88800d88cbc8 [ 38.344403] which belongs to the cache vm_area_struct of size 168 [ 38.346304] The buggy address is located 88 bytes inside of [ 38.346304] freed 168-byte region [ffff88800d88cbc8, ffff88800d88cc70) [ 38.348116] [ 38.348392] The buggy address belongs to the physical page: [ 38.349343] page:000000003ad71cdb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd88c [ 38.350760] memcg:ffff88800b3c3a01 [ 38.351304] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.352144] page_type: 0xffffffff() [ 38.352716] raw: 0100000000000200 ffff88800879fc80 ffffea0000364440 dead000000000004 [ 38.354086] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b3c3a01 [ 38.355256] page dumped because: kasan: bad access detected [ 38.356109] [ 38.356379] Memory state around the buggy address: [ 38.357122] ffff88800d88cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.358240] ffff88800d88cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.359349] >ffff88800d88cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.360440] ^ [ 38.361127] ffff88800d88cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.362228] ffff88800d88cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.363319] ================================================================== [ 38.364753] Disabling lock debugging due to kernel taint [ 40.653800] BUG: Bad rss-counter state mm:000000000ff08b65 type:MM_FILEPAGES val:33 [ 40.655302] BUG: Bad rss-counter state mm:000000000ff08b65 type:MM_ANONPAGES val:22 [ 41.121622] BUG: Bad rss-counter state mm:0000000042fea2ad type:MM_FILEPAGES val:33 [ 41.122726] BUG: Bad rss-counter state mm:0000000042fea2ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21497' (ECDSA) to the list of known hosts. 2023/06/20 06:17:51 fuzzer started 2023/06/20 06:17:51 dialing manager at localhost:44161 2023/06/20 06:17:51 checking machine... 2023/06/20 06:17:51 checking revisions... [ 41.813054] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:17:51 testing simple program... [ 41.861302] cgroup: Unknown subsys name 'net' [ 41.917100] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:17:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c9efb80 RCX=0000000000000000 RDX=ffff8880166a51c0 RSI=ffffffff81851ad2 RDI=0000000000000005 RBP=ffff888019b02a50 RSP=ffff88801a3d7a88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800c9efd00 R14=0000000000008000 R15=ffff88800c9efd10 RIP=ffffffff814c081b 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 00007fc7230f0900 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=00007fff1da97000 CR3=000000000e34e000 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=00007f4d1509cd10 CR3=000000000d600000 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=3959cf2f74273bb74a40fbc4ff0f13c6 XMM02=000000000011daf0eff9b2d0a8fce9cb XMM03=000000000011dbc02c67c8bc2e329bc3 XMM04=3a4c809ce0344c8200000000000ae988 XMM05=a86ad6912a46704d0000000000136208 XMM06=4fda316b135da52b0000000000135630 XMM07=e042d86d42eb936e00000000001243b8 XMM08=6971411561427710000000000011dbc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000