syzkaller login: [ 30.842937] BUG: Bad rss-counter state mm:0000000016245527 type:MM_FILEPAGES val:33 [ 30.844107] BUG: Bad rss-counter state mm:0000000016245527 type:MM_ANONPAGES val:22 [ 31.003078] ================================================================== [ 31.004108] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.005135] Read of size 8 at addr ffff8880164b8968 by task sshd/221 [ 31.006119] [ 31.006354] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.007310] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.008427] Call Trace: [ 31.008783] [ 31.009103] dump_stack_lvl+0x91/0xf0 [ 31.009643] print_report+0xcc/0x620 [ 31.010185] ? __virt_addr_valid+0x102/0x340 [ 31.010797] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.011496] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.012200] kasan_report+0xbe/0xf0 [ 31.012722] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.013416] vma_interval_tree_remove+0xc75/0xec0 [ 31.014083] vma_prepare+0xc54/0x11a0 [ 31.014614] __split_vma+0x5af/0x950 [ 31.015134] ? __pfx___split_vma+0x10/0x10 [ 31.015740] ? find_held_lock+0x2c/0x110 [ 31.016357] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.016990] ? lock_is_held_type+0x9f/0x120 [ 31.017594] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.018278] ? mtree_range_walk+0x632/0x900 [ 31.018885] ? mas_walk+0x5c7/0x7c0 [ 31.019415] do_vmi_munmap+0x1f1/0x2b0 [ 31.019966] mmap_region+0x1f9/0x2660 [ 31.020489] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.021064] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.021880] ? __pfx_lock_acquire+0x10/0x10 [ 31.022488] ? __pfx_mmap_region+0x10/0x10 [ 31.023069] ? security_mmap_addr+0x7d/0xa0 [ 31.023643] ? get_unmapped_area+0x1f5/0x3f0 [ 31.024238] do_mmap+0x854/0xf00 [ 31.024727] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.025279] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.025914] ksys_mmap_pgoff+0x3af/0x500 [ 31.026470] do_syscall_64+0x3f/0x90 [ 31.027002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.027716] RIP: 0033:0x7fb94206ed82 [ 31.028232] 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 [ 31.030596] RSP: 002b:00007ffe24dd92a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.031604] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb94206ed82 [ 31.032554] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9414a8000 [ 31.033502] RBP: 00007fb9414a8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.034452] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f06a73eec0 [ 31.035380] R13: 00007ffe24dd92c0 R14: 00007ffe24dd92f0 R15: 00007ffe24dd9650 [ 31.036346] [ 31.036669] [ 31.036895] Allocated by task 214: [ 31.037364] kasan_save_stack+0x22/0x50 [ 31.037926] kasan_set_track+0x25/0x30 [ 31.038471] __kasan_slab_alloc+0x59/0x70 [ 31.039051] kmem_cache_alloc+0x16b/0x370 [ 31.039650] vm_area_dup+0x20/0x160 [ 31.040219] __split_vma+0x170/0x950 [ 31.040746] split_vma+0xc6/0x110 [ 31.041264] mprotect_fixup+0x8d2/0xb30 [ 31.041816] do_mprotect_pkey+0x87e/0xd40 [ 31.042474] __x64_sys_mprotect+0x78/0xc0 [ 31.043073] do_syscall_64+0x3f/0x90 [ 31.043574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.044342] [ 31.044612] Freed by task 214: [ 31.045062] kasan_save_stack+0x22/0x50 [ 31.045593] kasan_set_track+0x25/0x30 [ 31.046123] kasan_save_free_info+0x2b/0x50 [ 31.046769] __kasan_slab_free+0x10a/0x190 [ 31.047497] kmem_cache_free+0x10d/0x4d0 [ 31.048069] rcu_core+0x8c8/0x2860 [ 31.048541] __do_softirq+0x1b7/0x7d4 [ 31.049066] [ 31.049321] Last potentially related work creation: [ 31.050034] kasan_save_stack+0x22/0x50 [ 31.050605] __kasan_record_aux_stack+0x8e/0xa0 [ 31.051271] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.051960] remove_vma+0x139/0x170 [ 31.052472] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.053135] do_vmi_munmap+0x1f1/0x2b0 [ 31.053658] __vm_munmap+0x138/0x3a0 [ 31.054218] __x64_sys_munmap+0x59/0x80 [ 31.054822] do_syscall_64+0x3f/0x90 [ 31.055387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.056190] [ 31.056451] The buggy address belongs to the object at ffff8880164b8910 [ 31.056451] which belongs to the cache vm_area_struct of size 168 [ 31.058041] The buggy address is located 88 bytes inside of [ 31.058041] freed 168-byte region [ffff8880164b8910, ffff8880164b89b8) [ 31.059588] [ 31.059847] The buggy address belongs to the physical page: [ 31.060604] page:00000000140bc583 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164b8 [ 31.061699] memcg:ffff8880164b9001 [ 31.062154] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.062869] page_type: 0xffffffff() [ 31.063431] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.064571] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164b9001 [ 31.065518] page dumped because: kasan: bad access detected [ 31.066194] [ 31.066410] Memory state around the buggy address: [ 31.066999] ffff8880164b8800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.067883] ffff8880164b8880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.068765] >ffff8880164b8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.069667] ^ [ 31.070497] ffff8880164b8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.071403] ffff8880164b8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.072438] ================================================================== [ 31.073545] Disabling lock debugging due to kernel taint [ 33.649819] BUG: Bad rss-counter state mm:00000000bc9dd722 type:MM_FILEPAGES val:33 [ 33.650838] BUG: Bad rss-counter state mm:00000000bc9dd722 type:MM_ANONPAGES val:22 [ 34.090153] BUG: Bad rss-counter state mm:00000000ff3732e1 type:MM_FILEPAGES val:33 [ 34.091543] BUG: Bad rss-counter state mm:00000000ff3732e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19822' (ECDSA) to the list of known hosts. 2023/06/20 14:32:00 fuzzer started 2023/06/20 14:32:00 dialing manager at localhost:36067 2023/06/20 14:32:00 checking machine... 2023/06/20 14:32:00 checking revisions... [ 34.826076] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:32:00 testing simple program... [ 34.886483] cgroup: Unknown subsys name 'net' [ 34.937130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:32:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016ea0000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81efcf42 RDI=ffff888016ea03f4 RBP=0000000000000001 RSP=ffff8880194476a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000020000000 R11=656d616e74736f68 R12=0000000020000000 R13=0000000000000005 R14=0000000000000001 R15=ffff888019447730 RIP=ffffffff8135bd6b RFL=00000217 [----APC] 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 00007f3b786ba900 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=00007ffe3087e000 CR3=000000000c68e000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007f7177d00140 CR3=000000000c672000 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=b7ca7d619e1cfaaf244ec3096f7231c7 XMM02=000000000011b940ec2efd57dc4c00df XMM03=000000000012261010a54a23e531d3d7 XMM04=bd0866bbd810a95800000000000ae988 XMM05=cb5e13186f057a9300000000001332e0 XMM06=c291bd5c70af25b90000000000132380 XMM07=e042d86d42eb936e0000000000122890 XMM08=10a54a23e531d3d7000000000011b9a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000