syzkaller login: [ 31.600118] BUG: Bad rss-counter state mm:00000000b2337bc5 type:MM_FILEPAGES val:33 [ 31.601177] BUG: Bad rss-counter state mm:00000000b2337bc5 type:MM_ANONPAGES val:22 [ 31.763925] ================================================================== [ 31.764873] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.765866] Read of size 8 at addr ffff88800ffa9310 by task sshd/219 [ 31.766775] [ 31.767011] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.767911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.768952] Call Trace: [ 31.769294] [ 31.769609] dump_stack_lvl+0x91/0xf0 [ 31.770136] print_report+0xcc/0x620 [ 31.770652] ? __virt_addr_valid+0x102/0x340 [ 31.771235] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.771895] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.772547] kasan_report+0xbe/0xf0 [ 31.773058] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.773730] vma_interval_tree_remove+0xc75/0xec0 [ 31.774356] vma_prepare+0xc54/0x11a0 [ 31.774865] __split_vma+0x5af/0x950 [ 31.775354] ? __pfx___split_vma+0x10/0x10 [ 31.775913] ? find_held_lock+0x2c/0x110 [ 31.776456] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.777067] ? lock_is_held_type+0x9f/0x120 [ 31.777657] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.778293] ? mtree_range_walk+0x632/0x900 [ 31.778878] ? mas_walk+0x5c7/0x7c0 [ 31.779382] do_vmi_munmap+0x1f1/0x2b0 [ 31.779903] mmap_region+0x1f9/0x2660 [ 31.780413] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.780951] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.781726] ? __pfx_lock_acquire+0x10/0x10 [ 31.782292] ? __pfx_mmap_region+0x10/0x10 [ 31.782883] ? security_mmap_addr+0x7d/0xa0 [ 31.783460] ? get_unmapped_area+0x1f5/0x3f0 [ 31.784049] do_mmap+0x854/0xf00 [ 31.784546] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.785080] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.785709] ksys_mmap_pgoff+0x3af/0x500 [ 31.786281] do_syscall_64+0x3f/0x90 [ 31.786813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.787514] RIP: 0033:0x7f050bf42d82 [ 31.787998] 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 [ 31.790315] RSP: 002b:00007ffe8994bdb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.791256] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f050bf42d82 [ 31.792148] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f050b37c000 [ 31.793029] RBP: 00007f050b37c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.793940] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f0788aec0 [ 31.794829] R13: 00007ffe8994bdd0 R14: 00007ffe8994be00 R15: 00007ffe8994c160 [ 31.795737] [ 31.796050] [ 31.796276] Allocated by task 212: [ 31.796724] kasan_save_stack+0x22/0x50 [ 31.797254] kasan_set_track+0x25/0x30 [ 31.797795] __kasan_slab_alloc+0x59/0x70 [ 31.798346] kmem_cache_alloc+0x16b/0x370 [ 31.798886] vm_area_dup+0x20/0x160 [ 31.799377] __split_vma+0x170/0x950 [ 31.799872] split_vma+0xc6/0x110 [ 31.800334] mprotect_fixup+0x8d2/0xb30 [ 31.800875] do_mprotect_pkey+0x87e/0xd40 [ 31.801455] __x64_sys_mprotect+0x78/0xc0 [ 31.802009] do_syscall_64+0x3f/0x90 [ 31.802511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.803187] [ 31.803414] Freed by task 212: [ 31.803829] kasan_save_stack+0x22/0x50 [ 31.804358] kasan_set_track+0x25/0x30 [ 31.804890] kasan_save_free_info+0x2b/0x50 [ 31.805459] __kasan_slab_free+0x10a/0x190 [ 31.806026] kmem_cache_free+0x10d/0x4d0 [ 31.806561] rcu_core+0x8c8/0x2860 [ 31.807034] __do_softirq+0x1b7/0x7d4 [ 31.807548] [ 31.807780] Last potentially related work creation: [ 31.808395] kasan_save_stack+0x22/0x50 [ 31.808925] __kasan_record_aux_stack+0x8e/0xa0 [ 31.809565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.810253] remove_vma+0x139/0x170 [ 31.810736] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.811324] do_vmi_munmap+0x1f1/0x2b0 [ 31.811833] __vm_munmap+0x138/0x3a0 [ 31.812324] __x64_sys_munmap+0x59/0x80 [ 31.812846] do_syscall_64+0x3f/0x90 [ 31.813344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.814041] [ 31.814268] Second to last potentially related work creation: [ 31.814983] kasan_save_stack+0x22/0x50 [ 31.815507] __kasan_record_aux_stack+0x8e/0xa0 [ 31.816109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.816787] remove_vma+0x139/0x170 [ 31.817264] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.817875] do_vmi_munmap+0x1f1/0x2b0 [ 31.818388] mmap_region+0x1f9/0x2660 [ 31.818897] do_mmap+0x854/0xf00 [ 31.819355] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.819869] ksys_mmap_pgoff+0x3af/0x500 [ 31.820396] do_syscall_64+0x3f/0x90 [ 31.820895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.821587] [ 31.821825] The buggy address belongs to the object at ffff88800ffa92b8 [ 31.821825] which belongs to the cache vm_area_struct of size 168 [ 31.823360] The buggy address is located 88 bytes inside of [ 31.823360] freed 168-byte region [ffff88800ffa92b8, ffff88800ffa9360) [ 31.824838] [ 31.825073] The buggy address belongs to the physical page: [ 31.825799] page:000000002f5886c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xffa9 [ 31.826933] memcg:ffff888018d39f01 [ 31.827380] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.828115] page_type: 0xffffffff() [ 31.828599] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b25c0 dead000000000005 [ 31.829608] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d39f01 [ 31.830559] page dumped because: kasan: bad access detected [ 31.831267] [ 31.831499] Memory state around the buggy address: [ 31.832101] ffff88800ffa9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.833004] ffff88800ffa9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.833923] >ffff88800ffa9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.834841] ^ [ 31.835361] ffff88800ffa9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.836295] ffff88800ffa9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.837233] ================================================================== [ 31.838404] Disabling lock debugging due to kernel taint [ 33.828764] BUG: Bad rss-counter state mm:0000000069332449 type:MM_FILEPAGES val:33 [ 33.829908] BUG: Bad rss-counter state mm:0000000069332449 type:MM_ANONPAGES val:22 [ 34.394943] BUG: Bad rss-counter state mm:00000000c723a4c1 type:MM_FILEPAGES val:33 [ 34.395939] BUG: Bad rss-counter state mm:00000000c723a4c1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37532' (ECDSA) to the list of known hosts. 2023/06/20 21:11:04 fuzzer started 2023/06/20 21:11:04 dialing manager at localhost:36067 2023/06/20 21:11:04 checking machine... 2023/06/20 21:11:04 checking revisions... [ 35.073538] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:11:04 testing simple program... [ 35.130523] cgroup: Unknown subsys name 'net' [ 35.179509] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:11:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab1b07 RDI=ffffffff87f9768c RBP=0000000000000000 RSP=ffff88800fccf500 R8 =0000000000000000 R9 =fffffbfff0ff2fc8 R10=ffffffff87f97e43 R11=00000ad800000ad8 R12=0000000000000000 R13=0000000000000069 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0871 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 00007fa27fdc7900 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=00007fa28037e618 CR3=000000000e3e8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f446438b5c0 CR3=000000000cad8000 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=56bbbe2dc73b2bbfd24bf14472bc6fd3 XMM02=000000000011be68ec2efd57dc4c00df XMM03=000000000012207091e928c3674f48ea XMM04=2cec302da950bd4d00000000000ae988 XMM05=dfcdbad4f1609c370000000000132f60 XMM06=e7ff4c7ad2e367d20000000000132138 XMM07=e042d86d42eb936e0000000000122348 XMM08=91e928c3674f48ea000000000011bec8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000