syzkaller login: [ 29.871738] BUG: Bad rss-counter state mm:000000009c874f1e type:MM_FILEPAGES val:33 [ 29.872938] BUG: Bad rss-counter state mm:000000009c874f1e type:MM_ANONPAGES val:22 [ 30.020788] ================================================================== [ 30.021917] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.023106] Read of size 8 at addr ffff8880098eea50 by task sshd/221 [ 30.024191] [ 30.024481] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.025533] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.026787] Call Trace: [ 30.027163] [ 30.027458] dump_stack_lvl+0x91/0xf0 [ 30.027968] print_report+0xcc/0x620 [ 30.028473] ? __virt_addr_valid+0x102/0x340 [ 30.029071] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.029715] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.030358] kasan_report+0xbe/0xf0 [ 30.030855] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.031507] vma_interval_tree_remove+0xc75/0xec0 [ 30.032143] vma_prepare+0xc54/0x11a0 [ 30.032643] __split_vma+0x5af/0x950 [ 30.033143] ? __pfx___split_vma+0x10/0x10 [ 30.033701] ? find_held_lock+0x2c/0x110 [ 30.034239] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.034851] ? lock_is_held_type+0x9f/0x120 [ 30.035428] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.036081] ? mtree_range_walk+0x632/0x900 [ 30.036667] ? mas_walk+0x5c7/0x7c0 [ 30.037157] do_vmi_munmap+0x1f1/0x2b0 [ 30.037675] mmap_region+0x1f9/0x2660 [ 30.038175] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.038709] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.039462] ? __pfx_lock_acquire+0x10/0x10 [ 30.040021] ? __pfx_mmap_region+0x10/0x10 [ 30.040574] ? security_mmap_addr+0x7d/0xa0 [ 30.041127] ? get_unmapped_area+0x1f5/0x3f0 [ 30.041697] do_mmap+0x854/0xf00 [ 30.042146] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.042664] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.043255] ksys_mmap_pgoff+0x3af/0x500 [ 30.043792] do_syscall_64+0x3f/0x90 [ 30.044280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.044962] RIP: 0033:0x7f29de181d82 [ 30.045431] 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 [ 30.047682] RSP: 002b:00007ffc8d7078a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.048633] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29de181d82 [ 30.049511] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29dd5bb000 [ 30.050392] RBP: 00007f29dd5bb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.051272] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1bd911d90 [ 30.052154] R13: 00007ffc8d7078c0 R14: 00007ffc8d7078f0 R15: 00007ffc8d707c50 [ 30.053043] [ 30.053357] [ 30.053588] Allocated by task 214: [ 30.054038] kasan_save_stack+0x22/0x50 [ 30.054573] kasan_set_track+0x25/0x30 [ 30.055091] __kasan_slab_alloc+0x59/0x70 [ 30.055631] kmem_cache_alloc+0x16b/0x370 [ 30.056164] vm_area_dup+0x20/0x160 [ 30.056642] __split_vma+0x170/0x950 [ 30.057127] split_vma+0xc6/0x110 [ 30.057601] mprotect_fixup+0x8d2/0xb30 [ 30.058127] do_mprotect_pkey+0x87e/0xd40 [ 30.058663] __x64_sys_mprotect+0x78/0xc0 [ 30.059212] do_syscall_64+0x3f/0x90 [ 30.059701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.060367] [ 30.060591] Freed by task 214: [ 30.061004] kasan_save_stack+0x22/0x50 [ 30.061525] kasan_set_track+0x25/0x30 [ 30.062036] kasan_save_free_info+0x2b/0x50 [ 30.062603] __kasan_slab_free+0x10a/0x190 [ 30.063160] kmem_cache_free+0x10d/0x4d0 [ 30.063696] rcu_core+0x8c8/0x2860 [ 30.064149] __do_softirq+0x1b7/0x7d4 [ 30.064649] [ 30.064874] Last potentially related work creation: [ 30.065571] kasan_save_stack+0x22/0x50 [ 30.066101] __kasan_record_aux_stack+0x8e/0xa0 [ 30.066721] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.067416] remove_vma+0x139/0x170 [ 30.067901] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.068484] do_vmi_munmap+0x1f1/0x2b0 [ 30.068995] __vm_munmap+0x138/0x3a0 [ 30.069482] __x64_sys_munmap+0x59/0x80 [ 30.070000] do_syscall_64+0x3f/0x90 [ 30.070484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.071158] [ 30.071382] The buggy address belongs to the object at ffff8880098ee9f8 [ 30.071382] which belongs to the cache vm_area_struct of size 168 [ 30.072923] The buggy address is located 88 bytes inside of [ 30.072923] freed 168-byte region [ffff8880098ee9f8, ffff8880098eeaa0) [ 30.074406] [ 30.074625] The buggy address belongs to the physical page: [ 30.075338] page:00000000e78d194a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x98ee [ 30.076467] memcg:ffff888019f35101 [ 30.076904] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.077591] page_type: 0xffffffff() [ 30.078068] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.079044] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f35101 [ 30.079984] page dumped because: kasan: bad access detected [ 30.080674] [ 30.080900] Memory state around the buggy address: [ 30.081492] ffff8880098ee900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.082408] ffff8880098ee980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.083313] >ffff8880098eea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.084202] ^ [ 30.084926] ffff8880098eea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.085814] ffff8880098eeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.086705] ================================================================== [ 30.087768] Disabling lock debugging due to kernel taint [ 31.895040] BUG: Bad rss-counter state mm:000000001c63823e type:MM_FILEPAGES val:33 [ 31.895799] BUG: Bad rss-counter state mm:000000001c63823e type:MM_ANONPAGES val:22 [ 32.344196] BUG: Bad rss-counter state mm:00000000fd6d71b9 type:MM_FILEPAGES val:33 [ 32.345536] BUG: Bad rss-counter state mm:00000000fd6d71b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8109' (ECDSA) to the list of known hosts. 2023/06/21 00:26:50 fuzzer started 2023/06/21 00:26:50 dialing manager at localhost:36067 2023/06/21 00:26:50 checking machine... 2023/06/21 00:26:50 checking revisions... [ 33.066261] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:26:50 testing simple program... [ 33.109697] cgroup: Unknown subsys name 'net' [ 33.171807] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:26:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000296 RCX=0000000000000000 RDX=ffff88800905b680 RSI=ffffffff81656dd2 RDI=ffff888018f9c068 RBP=1ffff11001217f34 RSP=ffff8880090bf990 R8 =0000000000000005 R9 =0000000000000000 R10=0000000010000000 R11=0000000000000128 R12=ffff888018f9c068 R13=ffffffff81656dd2 R14=0000000000000001 R15=ffff888018f9c050 RIP=ffffffff812d8699 RFL=00000012 [----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 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=0000560f9cbbe2de CR3=0000000015c7e000 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=c5894900000000c045c748e8014c0000 XMM02=243c8b4dea75003b8000000190840fdd XMM03=850f0000000438bf8349000005a7850f XMM04=0474c085481842894801000a6eef2d83 XMM05=490000059b840f00ffffff7dbd800000 XMM06=8b480c74000009feaa3d8348000001c7 XMM07=cbe8ffffff58bd8b480c74000009fe59 XMM08=fffb67e9de89098b4dfff57820850f08 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfcbe RBX=ffffffff85dfe5f4 RCX=ffffffff8180f5ba RDX=0000000000000000 RSI=ffffffff8613971a RDI=ffffffff85dfe5d0 RBP=ffffffff85dfe5f0 RSP=ffff88800f7b7580 R8 =ffffffff8613971a R9 =ffff88800f7b7678 R10=0000000000038001 R11=0000000000020f03 R12=ffffffff85dfe5f8 R13=ffffffff85dfe5d0 R14=ffffffff85dfe5ec R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f53da169900 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=00007ffe17682000 CR3=0000000015c7e000 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