syzkaller login: [ 96.100693] BUG: Bad rss-counter state mm:0000000055df70a9 type:MM_FILEPAGES val:33 [ 96.101768] BUG: Bad rss-counter state mm:0000000055df70a9 type:MM_ANONPAGES val:22 [ 96.278925] ================================================================== [ 96.279847] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 96.280785] Read of size 8 at addr ffff888018eb93f8 by task sshd/224 [ 96.281657] [ 96.281874] CPU: 0 PID: 224 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 96.282942] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 96.283938] Call Trace: [ 96.284261] [ 96.284547] dump_stack_lvl+0x91/0xf0 [ 96.285038] print_report+0xcc/0x620 [ 96.285516] ? __virt_addr_valid+0x102/0x340 [ 96.286093] ? vma_interval_tree_remove+0xc75/0xec0 [ 96.286714] ? vma_interval_tree_remove+0xc75/0xec0 [ 96.287329] kasan_report+0xbe/0xf0 [ 96.287808] ? vma_interval_tree_remove+0xc75/0xec0 [ 96.288422] vma_interval_tree_remove+0xc75/0xec0 [ 96.289019] vma_prepare+0xc54/0x11a0 [ 96.289511] __split_vma+0x5af/0x950 [ 96.289997] ? __pfx___split_vma+0x10/0x10 [ 96.290544] ? find_held_lock+0x2c/0x110 [ 96.291058] do_vmi_align_munmap+0x2ba/0x11f0 [ 96.291623] ? lock_is_held_type+0x9f/0x120 [ 96.292156] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 96.292767] ? mtree_range_walk+0x632/0x900 [ 96.293313] ? mas_walk+0x5c7/0x7c0 [ 96.293786] do_vmi_munmap+0x1f1/0x2b0 [ 96.294303] mmap_region+0x1f9/0x2660 [ 96.294816] ? vm_mmap_pgoff+0x15c/0x3a0 [ 96.295346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 96.296073] ? __pfx_lock_acquire+0x10/0x10 [ 96.296617] ? __pfx_mmap_region+0x10/0x10 [ 96.297155] ? security_mmap_addr+0x7d/0xa0 [ 96.297711] ? get_unmapped_area+0x1f5/0x3f0 [ 96.298309] do_mmap+0x854/0xf00 [ 96.298751] vm_mmap_pgoff+0x1a6/0x3a0 [ 96.299257] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 96.299833] ksys_mmap_pgoff+0x3af/0x500 [ 96.300352] do_syscall_64+0x3f/0x90 [ 96.300839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 96.301496] RIP: 0033:0x7f9e2714dd82 [ 96.301962] 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 [ 96.304170] RSP: 002b:00007fffde9f6c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 96.305101] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e2714dd82 [ 96.305982] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e26587000 [ 96.306871] RBP: 00007f9e26587000 R08: 0000000000000009 R09: 0000000000001000 [ 96.307735] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559767107ec0 [ 96.308596] R13: 00007fffde9f6cb0 R14: 00007fffde9f6ce0 R15: 00007fffde9f7040 [ 96.309465] [ 96.309761] [ 96.309981] Allocated by task 217: [ 96.310433] kasan_save_stack+0x22/0x50 [ 96.310946] kasan_set_track+0x25/0x30 [ 96.311450] __kasan_slab_alloc+0x59/0x70 [ 96.311980] kmem_cache_alloc+0x16b/0x370 [ 96.312504] vm_area_dup+0x20/0x160 [ 96.312968] __split_vma+0x170/0x950 [ 96.313446] split_vma+0xc6/0x110 [ 96.313893] mprotect_fixup+0x8d2/0xb30 [ 96.314437] do_mprotect_pkey+0x87e/0xd40 [ 96.314965] __x64_sys_mprotect+0x78/0xc0 [ 96.315502] do_syscall_64+0x3f/0x90 [ 96.315984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 96.316647] [ 96.316868] Freed by task 19: [ 96.317259] kasan_save_stack+0x22/0x50 [ 96.317765] kasan_set_track+0x25/0x30 [ 96.318276] kasan_save_free_info+0x2b/0x50 [ 96.318827] __kasan_slab_free+0x10a/0x190 [ 96.319371] kmem_cache_free+0x10d/0x4d0 [ 96.319892] rcu_core+0x8c8/0x2860 [ 96.320352] __do_softirq+0x1b7/0x7d4 [ 96.320833] [ 96.321051] Last potentially related work creation: [ 96.321652] kasan_save_stack+0x22/0x50 [ 96.322194] __kasan_record_aux_stack+0x8e/0xa0 [ 96.322774] __call_rcu_common.constprop.0+0x6a/0xb90 [ 96.323426] remove_vma+0x139/0x170 [ 96.323893] do_vmi_align_munmap+0xd4a/0x11f0 [ 96.324463] do_vmi_munmap+0x1f1/0x2b0 [ 96.324960] __vm_munmap+0x138/0x3a0 [ 96.325435] __x64_sys_munmap+0x59/0x80 [ 96.325942] do_syscall_64+0x3f/0x90 [ 96.326433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 96.327090] [ 96.327317] The buggy address belongs to the object at ffff888018eb93a0 [ 96.327317] which belongs to the cache vm_area_struct of size 168 [ 96.328816] The buggy address is located 88 bytes inside of [ 96.328816] freed 168-byte region [ffff888018eb93a0, ffff888018eb9448) [ 96.330279] [ 96.330500] The buggy address belongs to the physical page: [ 96.331172] page:0000000040fd8e23 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18eb9 [ 96.332281] memcg:ffff88800eeaaa01 [ 96.332718] flags: 0x100000000000200(slab|node=0|zone=1) [ 96.333363] page_type: 0xffffffff() [ 96.333822] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 96.334783] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeaaa01 [ 96.335712] page dumped because: kasan: bad access detected [ 96.336398] [ 96.336622] Memory state around the buggy address: [ 96.337220] ffff888018eb9280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 96.338109] ffff888018eb9300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 96.338981] >ffff888018eb9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 96.339862] ^ [ 96.340716] ffff888018eb9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 96.341590] ffff888018eb9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 96.342475] ================================================================== [ 96.343472] Disabling lock debugging due to kernel taint [ 98.227220] BUG: Bad rss-counter state mm:000000000e51dd6a type:MM_FILEPAGES val:33 [ 98.228485] BUG: Bad rss-counter state mm:000000000e51dd6a type:MM_ANONPAGES val:22 [ 98.735219] BUG: Bad rss-counter state mm:000000005b4bf489 type:MM_FILEPAGES val:33 [ 98.736473] BUG: Bad rss-counter state mm:000000005b4bf489 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10083' (ECDSA) to the list of known hosts. 2023/06/20 07:38:01 fuzzer started 2023/06/20 07:38:01 dialing manager at localhost:44161 2023/06/20 07:38:01 checking machine... 2023/06/20 07:38:01 checking revisions... [ 99.455324] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:38:01 testing simple program... [ 99.496743] cgroup: Unknown subsys name 'net' [ 99.563935] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:37:04 Registers: info registers vcpu 0 RAX=ffffffff81128d60 RBX=0000000000000000 RCX=ffffffff8153447a RDX=1ffffffff0a58b98 RSI=0000000000000000 RDI=00000000000000b0 RBP=ffffffff852c5cc0 RSP=ffff88806ce09fd8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff88806ce09ff8 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81128d64 RFL=00000046 [---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 00007f11cf4d4700 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=00007f37716d5750 CR3=0000000019972000 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=2031303a38333a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3333 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3333325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a38333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000007 RSI=ffffffff81ef7a9a RDI=0000000000000001 RBP=0000000000000001 RSP=ffff88800cfb7810 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000007 R13=0000000000000007 R14=0000000000000005 R15=ffff88800cfb78d0 RIP=ffffffff814c07f1 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 00007f86eb064900 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=00007fffec6db000 CR3=000000000ec02000 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