syzkaller login: [ 30.835299] BUG: Bad rss-counter state mm:00000000d38b7bd6 type:MM_FILEPAGES val:33 [ 30.836555] BUG: Bad rss-counter state mm:00000000d38b7bd6 type:MM_ANONPAGES val:22 [ 30.876280] ================================================================== [ 30.877226] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.878304] Read of size 8 at addr ffff88800c420d08 by task sshd/222 [ 30.879120] [ 30.879344] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.880232] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.881248] Call Trace: [ 30.881575] [ 30.881862] dump_stack_lvl+0x91/0xf0 [ 30.882384] print_report+0xcc/0x620 [ 30.882887] ? __virt_addr_valid+0x102/0x340 [ 30.883465] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.884114] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.884775] kasan_report+0xbe/0xf0 [ 30.885283] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.885906] vma_interval_tree_remove+0xc75/0xec0 [ 30.886544] vma_prepare+0xc54/0x11a0 [ 30.887035] __split_vma+0x5af/0x950 [ 30.887525] ? __pfx___split_vma+0x10/0x10 [ 30.888085] ? find_held_lock+0x2c/0x110 [ 30.888643] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.889227] ? lock_is_held_type+0x9f/0x120 [ 30.889773] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.890428] ? mtree_range_walk+0x632/0x900 [ 30.890984] ? mas_walk+0x5c7/0x7c0 [ 30.891493] do_vmi_munmap+0x1f1/0x2b0 [ 30.891998] mmap_region+0x1f9/0x2660 [ 30.892533] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.893074] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.893807] ? __pfx_lock_acquire+0x10/0x10 [ 30.894372] ? __pfx_mmap_region+0x10/0x10 [ 30.894906] ? security_mmap_addr+0x7d/0xa0 [ 30.895460] ? get_unmapped_area+0x1f5/0x3f0 [ 30.896021] do_mmap+0x854/0xf00 [ 30.896501] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.896999] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.897589] ksys_mmap_pgoff+0x3af/0x500 [ 30.898143] do_syscall_64+0x3f/0x90 [ 30.898631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.899317] RIP: 0033:0x7f6dc89a4d82 [ 30.899785] 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 [ 30.901981] RSP: 002b:00007ffced3a5f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.902919] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6dc89a4d82 [ 30.903794] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6dc7dde000 [ 30.904699] RBP: 00007f6dc7dde000 R08: 0000000000000009 R09: 0000000000001000 [ 30.905574] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fdccb7df60 [ 30.906463] R13: 00007ffced3a5f20 R14: 00007ffced3a5f50 R15: 00007ffced3a62b0 [ 30.907350] [ 30.907654] [ 30.907870] Allocated by task 215: [ 30.908328] kasan_save_stack+0x22/0x50 [ 30.908867] kasan_set_track+0x25/0x30 [ 30.909389] __kasan_slab_alloc+0x59/0x70 [ 30.909920] kmem_cache_alloc+0x16b/0x370 [ 30.910477] vm_area_dup+0x20/0x160 [ 30.910936] __split_vma+0x170/0x950 [ 30.911415] split_vma+0xc6/0x110 [ 30.911864] mprotect_fixup+0x8d2/0xb30 [ 30.912398] do_mprotect_pkey+0x87e/0xd40 [ 30.912933] __x64_sys_mprotect+0x78/0xc0 [ 30.913481] do_syscall_64+0x3f/0x90 [ 30.913965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.914659] [ 30.914888] Freed by task 215: [ 30.915305] kasan_save_stack+0x22/0x50 [ 30.915820] kasan_set_track+0x25/0x30 [ 30.916335] kasan_save_free_info+0x2b/0x50 [ 30.916903] __kasan_slab_free+0x10a/0x190 [ 30.917471] kmem_cache_free+0x10d/0x4d0 [ 30.917999] rcu_core+0x8c8/0x2860 [ 30.918482] __do_softirq+0x1b7/0x7d4 [ 30.918972] [ 30.919215] Last potentially related work creation: [ 30.919806] kasan_save_stack+0x22/0x50 [ 30.920325] __kasan_record_aux_stack+0x8e/0xa0 [ 30.920920] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.921624] remove_vma+0x139/0x170 [ 30.922114] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.922691] do_vmi_munmap+0x1f1/0x2b0 [ 30.923204] __vm_munmap+0x138/0x3a0 [ 30.923687] __x64_sys_munmap+0x59/0x80 [ 30.924210] do_syscall_64+0x3f/0x90 [ 30.924716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.925394] [ 30.925614] The buggy address belongs to the object at ffff88800c420cb0 [ 30.925614] which belongs to the cache vm_area_struct of size 168 [ 30.927155] The buggy address is located 88 bytes inside of [ 30.927155] freed 168-byte region [ffff88800c420cb0, ffff88800c420d58) [ 30.928614] [ 30.928835] The buggy address belongs to the physical page: [ 30.929520] page:0000000089730db4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc420 [ 30.930659] memcg:ffff88801a0d0601 [ 30.931113] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.931767] page_type: 0xffffffff() [ 30.932245] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.933229] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0d0601 [ 30.934187] page dumped because: kasan: bad access detected [ 30.934851] [ 30.935086] Memory state around the buggy address: [ 30.935683] ffff88800c420c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.936600] ffff88800c420c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.937502] >ffff88800c420d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.938411] ^ [ 30.938867] ffff88800c420d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.939772] ffff88800c420e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.940680] ================================================================== [ 30.941717] Disabling lock debugging due to kernel taint [ 32.886486] BUG: Bad rss-counter state mm:00000000dc2eb717 type:MM_FILEPAGES val:33 [ 32.887234] BUG: Bad rss-counter state mm:00000000dc2eb717 type:MM_ANONPAGES val:22 [ 33.317324] BUG: Bad rss-counter state mm:00000000d2a9a0ea type:MM_FILEPAGES val:33 [ 33.318061] BUG: Bad rss-counter state mm:00000000d2a9a0ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59296' (ECDSA) to the list of known hosts. 2023/06/20 06:59:01 fuzzer started 2023/06/20 06:59:02 dialing manager at localhost:44161 2023/06/20 06:59:02 checking machine... 2023/06/20 06:59:02 checking revisions... [ 34.007229] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:59:02 testing simple program... [ 34.050541] cgroup: Unknown subsys name 'net' [ 34.108485] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:59:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f57eda77be7 RCX=ffffffff81007b62 RDX=ffff88801a061b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88800f29f780 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6996 R12=ffff88800f29f8c8 R13=0000000000000000 R14=ffff88801a061b40 R15=ffff88800f7e0260 RIP=ffffffff814c0245 RFL=00000293 [--S-A-C] 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 00007f57ed595900 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=00007ffe91ee7000 CR3=000000000ece0000 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=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=ffff88806cf09bd8 RSI=0000000000000000 RDI=ffff88806cf09aa8 RBP=ffff88806cf09b30 RSP=ffff88806cf09a98 R8 =ffffffff860d68fa R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff8880147d6c60 RIP=ffffffff810bd057 RFL=00000296 [--S-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 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=00007f53b455aee0 CR3=000000000f39a000 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=6d50768fe38346bd484459716669dd2e XMM02=0000000000120090eff9b2d0a8fce9cb XMM03=00000000001201602c67c8bc2e329bc3 XMM04=aab88cf9564f4bd100000000000ae988 XMM05=83594ee05b8d38950000000000134420 XMM06=2c0f14e9e5d2bc1b0000000000133288 XMM07=e042d86d42eb936e0000000000124b20 XMM08=9c717665597e0d860000000000120160 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000