syzkaller login: [ 75.210655] BUG: Bad rss-counter state mm:00000000b5a3ffa6 type:MM_FILEPAGES val:33 [ 75.211834] BUG: Bad rss-counter state mm:00000000b5a3ffa6 type:MM_ANONPAGES val:22 [ 75.347644] ================================================================== [ 75.348586] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 75.349520] Read of size 8 at addr ffff88800e0a9d08 by task sshd/222 [ 75.350293] [ 75.350515] CPU: 1 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 75.351721] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 75.352734] Call Trace: [ 75.353057] [ 75.353348] dump_stack_lvl+0x91/0xf0 [ 75.353867] print_report+0xcc/0x620 [ 75.354350] ? __virt_addr_valid+0x102/0x340 [ 75.354912] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.355549] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.356180] kasan_report+0xbe/0xf0 [ 75.356657] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.357295] vma_interval_tree_remove+0xc75/0xec0 [ 75.357925] vma_prepare+0xc54/0x11a0 [ 75.358410] __split_vma+0x5af/0x950 [ 75.358894] ? __pfx___split_vma+0x10/0x10 [ 75.359428] ? find_held_lock+0x2c/0x110 [ 75.359962] do_vmi_align_munmap+0x2ba/0x11f0 [ 75.360546] ? lock_is_held_type+0x9f/0x120 [ 75.361097] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 75.361727] ? mtree_range_walk+0x632/0x900 [ 75.362275] ? mas_walk+0x5c7/0x7c0 [ 75.362754] do_vmi_munmap+0x1f1/0x2b0 [ 75.363248] mmap_region+0x1f9/0x2660 [ 75.363732] ? vm_mmap_pgoff+0x15c/0x3a0 [ 75.364286] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 75.365043] ? __pfx_lock_acquire+0x10/0x10 [ 75.365588] ? __pfx_mmap_region+0x10/0x10 [ 75.366119] ? security_mmap_addr+0x7d/0xa0 [ 75.366655] ? get_unmapped_area+0x1f5/0x3f0 [ 75.367210] do_mmap+0x854/0xf00 [ 75.367655] vm_mmap_pgoff+0x1a6/0x3a0 [ 75.368170] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 75.368735] ksys_mmap_pgoff+0x3af/0x500 [ 75.369250] do_syscall_64+0x3f/0x90 [ 75.369732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.370381] RIP: 0033:0x7efe612d9d82 [ 75.370846] 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 [ 75.373002] RSP: 002b:00007ffcfb611898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 75.373935] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe612d9d82 [ 75.374806] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe60713000 [ 75.375664] RBP: 00007efe60713000 R08: 0000000000000009 R09: 0000000000001000 [ 75.376534] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561316ea2ec0 [ 75.377392] R13: 00007ffcfb6118b0 R14: 00007ffcfb6118e0 R15: 00007ffcfb611c40 [ 75.378255] [ 75.378552] [ 75.378771] Allocated by task 214: [ 75.379208] kasan_save_stack+0x22/0x50 [ 75.379727] kasan_set_track+0x25/0x30 [ 75.380233] __kasan_slab_alloc+0x59/0x70 [ 75.380759] kmem_cache_alloc+0x16b/0x370 [ 75.381283] vm_area_dup+0x20/0x160 [ 75.381743] __split_vma+0x170/0x950 [ 75.382211] split_vma+0xc6/0x110 [ 75.382655] mprotect_fixup+0x8d2/0xb30 [ 75.383159] do_mprotect_pkey+0x87e/0xd40 [ 75.383683] __x64_sys_mprotect+0x78/0xc0 [ 75.384226] do_syscall_64+0x3f/0x90 [ 75.384706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.385349] [ 75.385569] Freed by task 19: [ 75.385953] kasan_save_stack+0x22/0x50 [ 75.386470] kasan_set_track+0x25/0x30 [ 75.386978] kasan_save_free_info+0x2b/0x50 [ 75.387513] __kasan_slab_free+0x10a/0x190 [ 75.388053] kmem_cache_free+0x10d/0x4d0 [ 75.388573] rcu_core+0x8c8/0x2860 [ 75.389020] __do_softirq+0x1b7/0x7d4 [ 75.389512] [ 75.389731] Last potentially related work creation: [ 75.390317] kasan_save_stack+0x22/0x50 [ 75.390826] __kasan_record_aux_stack+0x8e/0xa0 [ 75.391412] __call_rcu_common.constprop.0+0x6a/0xb90 [ 75.392083] remove_vma+0x139/0x170 [ 75.392533] do_vmi_align_munmap+0xd4a/0x11f0 [ 75.393180] do_vmi_munmap+0x1f1/0x2b0 [ 75.393675] __vm_munmap+0x138/0x3a0 [ 75.394149] __x64_sys_munmap+0x59/0x80 [ 75.394648] do_syscall_64+0x3f/0x90 [ 75.395120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.395782] [ 75.395998] The buggy address belongs to the object at ffff88800e0a9cb0 [ 75.395998] which belongs to the cache vm_area_struct of size 168 [ 75.397509] The buggy address is located 88 bytes inside of [ 75.397509] freed 168-byte region [ffff88800e0a9cb0, ffff88800e0a9d58) [ 75.398918] [ 75.399138] The buggy address belongs to the physical page: [ 75.399807] page:00000000bddd8045 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0a9 [ 75.400926] memcg:ffff88800e80e201 [ 75.401357] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 75.402069] page_type: 0xffffffff() [ 75.402539] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 75.403478] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e80e201 [ 75.404426] page dumped because: kasan: bad access detected [ 75.405100] [ 75.405315] Memory state around the buggy address: [ 75.405913] ffff88800e0a9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 75.406791] ffff88800e0a9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 75.407657] >ffff88800e0a9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 75.408539] ^ [ 75.408987] ffff88800e0a9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 75.409860] ffff88800e0a9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 75.410710] ================================================================== [ 75.411839] Disabling lock debugging due to kernel taint [ 77.286367] BUG: Bad rss-counter state mm:0000000059793ed4 type:MM_FILEPAGES val:33 [ 77.287508] BUG: Bad rss-counter state mm:0000000059793ed4 type:MM_ANONPAGES val:22 [ 77.732207] BUG: Bad rss-counter state mm:000000007a6256f6 type:MM_FILEPAGES val:33 [ 77.732990] BUG: Bad rss-counter state mm:000000007a6256f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8465' (ECDSA) to the list of known hosts. 2023/06/20 04:14:10 fuzzer started 2023/06/20 04:14:10 dialing manager at localhost:44161 2023/06/20 04:14:10 checking machine... 2023/06/20 04:14:10 checking revisions... [ 78.378415] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:14:10 testing simple program... [ 78.427414] cgroup: Unknown subsys name 'net' [ 78.470700] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:13:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f344c4a4980 CR3=000000000cab2000 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=9c70c15776ca0cbd91402412dd60e33a XMM02=0000000000120c60ec2efd57dc4c00df XMM03=00000000001281a85b39f9036a5a1582 XMM04=8005c24d5e7f63bf00000000000ae988 XMM05=cd59e362c34a350300000000001391c0 XMM06=00c3ffa147b8d8570000000000138260 XMM07=e042d86d42eb936e0000000000128428 XMM08=5b39f9036a5a15820000000000120cc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880097de200 RCX=ffffea000040ae01 RDX=ffffea000040ae00 RSI=ffff88800e6d6c80 RDI=ffff8880087b03c0 RBP=0000000000000000 RSP=ffff888014777c78 R8 =ffff8880102b9100 R9 =ffffffff818101af R10=ffffea000039b580 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888014777cb8 R14=ffff8880087b63c0 R15=ffff88800e6d6c80 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007fcc39f63900 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=00007fff1cb6b000 CR3=000000000ece6000 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