syzkaller login: [ 31.184026] BUG: Bad rss-counter state mm:00000000202fb953 type:MM_FILEPAGES val:33 [ 31.185259] BUG: Bad rss-counter state mm:00000000202fb953 type:MM_ANONPAGES val:22 [ 31.348895] ================================================================== [ 31.349998] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.351144] Read of size 8 at addr ffff88800c54b6b0 by task sshd/222 [ 31.352184] [ 31.352440] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.353503] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.354734] Call Trace: [ 31.355125] [ 31.355491] dump_stack_lvl+0x91/0xf0 [ 31.356087] print_report+0xcc/0x620 [ 31.356669] ? __virt_addr_valid+0x102/0x340 [ 31.357362] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.358126] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.358879] kasan_report+0xbe/0xf0 [ 31.359466] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.360215] vma_interval_tree_remove+0xc75/0xec0 [ 31.360948] vma_prepare+0xc54/0x11a0 [ 31.361526] __split_vma+0x5af/0x950 [ 31.362103] ? __pfx___split_vma+0x10/0x10 [ 31.362745] ? find_held_lock+0x2c/0x110 [ 31.363387] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.364080] ? lock_is_held_type+0x9f/0x120 [ 31.364747] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.365494] ? mtree_range_walk+0x632/0x900 [ 31.366167] ? mas_walk+0x5c7/0x7c0 [ 31.366750] do_vmi_munmap+0x1f1/0x2b0 [ 31.367376] mmap_region+0x1f9/0x2660 [ 31.367980] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.368594] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.369480] ? __pfx_lock_acquire+0x10/0x10 [ 31.370133] ? __pfx_mmap_region+0x10/0x10 [ 31.370783] ? security_mmap_addr+0x7d/0xa0 [ 31.371446] ? get_unmapped_area+0x1f5/0x3f0 [ 31.372113] do_mmap+0x854/0xf00 [ 31.372647] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.373260] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.373949] ksys_mmap_pgoff+0x3af/0x500 [ 31.374575] do_syscall_64+0x3f/0x90 [ 31.375154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.375950] RIP: 0033:0x7f067e730d82 [ 31.376515] 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 [ 31.379150] RSP: 002b:00007fff3527aaf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.380284] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f067e730d82 [ 31.381349] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f067db6a000 [ 31.382404] RBP: 00007f067db6a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.383406] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0db049b20 [ 31.384211] R13: 00007fff3527ab10 R14: 00007fff3527ab40 R15: 00007fff3527aea0 [ 31.385017] [ 31.385295] [ 31.385512] Allocated by task 215: [ 31.385919] kasan_save_stack+0x22/0x50 [ 31.386408] kasan_set_track+0x25/0x30 [ 31.386884] __kasan_slab_alloc+0x59/0x70 [ 31.387419] kmem_cache_alloc+0x16b/0x370 [ 31.387907] vm_area_dup+0x20/0x160 [ 31.388341] __split_vma+0x170/0x950 [ 31.388781] split_vma+0xc6/0x110 [ 31.389202] mprotect_fixup+0x8d2/0xb30 [ 31.389678] do_mprotect_pkey+0x87e/0xd40 [ 31.390175] __x64_sys_mprotect+0x78/0xc0 [ 31.390667] do_syscall_64+0x3f/0x90 [ 31.391119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.391744] [ 31.391948] Freed by task 215: [ 31.392320] kasan_save_stack+0x22/0x50 [ 31.392918] kasan_set_track+0x25/0x30 [ 31.393502] kasan_save_free_info+0x2b/0x50 [ 31.394130] __kasan_slab_free+0x10a/0x190 [ 31.394761] kmem_cache_free+0x10d/0x4d0 [ 31.395370] rcu_core+0x8c8/0x2860 [ 31.395895] __do_softirq+0x1b7/0x7d4 [ 31.396459] [ 31.396710] Last potentially related work creation: [ 31.397402] kasan_save_stack+0x22/0x50 [ 31.397994] __kasan_record_aux_stack+0x8e/0xa0 [ 31.398670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.399441] remove_vma+0x139/0x170 [ 31.399974] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.400629] do_vmi_munmap+0x1f1/0x2b0 [ 31.401202] __vm_munmap+0x138/0x3a0 [ 31.401751] __x64_sys_munmap+0x59/0x80 [ 31.402339] do_syscall_64+0x3f/0x90 [ 31.402899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.403665] [ 31.403917] Second to last potentially related work creation: [ 31.404718] kasan_save_stack+0x22/0x50 [ 31.405312] __kasan_record_aux_stack+0x8e/0xa0 [ 31.405991] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.406751] remove_vma+0x139/0x170 [ 31.407282] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.407963] do_vmi_munmap+0x1f1/0x2b0 [ 31.408535] mmap_region+0x1f9/0x2660 [ 31.409096] do_mmap+0x854/0xf00 [ 31.409599] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.410176] ksys_mmap_pgoff+0x3af/0x500 [ 31.410765] do_syscall_64+0x3f/0x90 [ 31.411323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.412087] [ 31.412337] The buggy address belongs to the object at ffff88800c54b658 [ 31.412337] which belongs to the cache vm_area_struct of size 168 [ 31.414076] The buggy address is located 88 bytes inside of [ 31.414076] freed 168-byte region [ffff88800c54b658, ffff88800c54b700) [ 31.415754] [ 31.416006] The buggy address belongs to the physical page: [ 31.416786] page:00000000086836d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc54b [ 31.418069] memcg:ffff88801a872301 [ 31.418572] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.419401] page_type: 0xffffffff() [ 31.419932] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.421022] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a872301 [ 31.422092] page dumped because: kasan: bad access detected [ 31.422871] [ 31.423121] Memory state around the buggy address: [ 31.423819] ffff88800c54b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.424832] ffff88800c54b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.425840] >ffff88800c54b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.426841] ^ [ 31.427545] ffff88800c54b700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.428545] ffff88800c54b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.429548] ================================================================== [ 31.430691] Disabling lock debugging due to kernel taint [ 33.014334] BUG: Bad rss-counter state mm:00000000d62153be type:MM_FILEPAGES val:33 [ 33.015495] BUG: Bad rss-counter state mm:00000000d62153be type:MM_ANONPAGES val:22 [ 33.510683] BUG: Bad rss-counter state mm:000000002869c2c9 type:MM_FILEPAGES val:33 [ 33.511884] BUG: Bad rss-counter state mm:000000002869c2c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4684' (ECDSA) to the list of known hosts. 2023/06/21 02:51:23 fuzzer started 2023/06/21 02:51:23 dialing manager at localhost:36067 2023/06/21 02:51:23 checking machine... 2023/06/21 02:51:23 checking revisions... [ 34.149633] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:51:23 testing simple program... [ 34.202951] cgroup: Unknown subsys name 'net' [ 34.243661] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:51:23 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff37972d88 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007faea49ba5100000562367d9d790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff83636c05 RDX=000000000002636c RSI=000000000002636c RDI=ffffffff865827a0 RBP=ffff88800f2d7668 RSP=ffff88800f2d75a0 R8 =0000000000000000 R9 =ffff88800f2d7650 R10=0000000000038001 R11=0000000000091bda R12=ffff88800f2d7670 R13=ffff88800f2d7658 R14=ffff88800f2d7651 R15=ffff88800f2d7610 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007f3cb3272900 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=00007ffc01e58000 CR3=000000000ea2a000 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