syzkaller login: [ 169.540770] BUG: Bad rss-counter state mm:00000000154374ae type:MM_FILEPAGES val:33 [ 169.542054] BUG: Bad rss-counter state mm:00000000154374ae type:MM_ANONPAGES val:22 [ 169.710646] ================================================================== [ 169.711575] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 169.712527] Read of size 8 at addr ffff88800d742228 by task sshd/225 [ 169.713403] [ 169.713637] CPU: 0 PID: 225 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 169.714670] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 169.715671] Call Trace: [ 169.715990] [ 169.716276] dump_stack_lvl+0x91/0xf0 [ 169.716762] print_report+0xcc/0x620 [ 169.717242] ? __virt_addr_valid+0x102/0x340 [ 169.717834] ? vma_interval_tree_remove+0xc75/0xec0 [ 169.718454] ? vma_interval_tree_remove+0xc75/0xec0 [ 169.719068] kasan_report+0xbe/0xf0 [ 169.719553] ? vma_interval_tree_remove+0xc75/0xec0 [ 169.720176] vma_interval_tree_remove+0xc75/0xec0 [ 169.720786] vma_prepare+0xc54/0x11a0 [ 169.721271] __split_vma+0x5af/0x950 [ 169.721747] ? __pfx___split_vma+0x10/0x10 [ 169.722276] ? find_held_lock+0x2c/0x110 [ 169.722798] do_vmi_align_munmap+0x2ba/0x11f0 [ 169.723364] ? lock_is_held_type+0x9f/0x120 [ 169.723902] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 169.724506] ? mtree_range_walk+0x632/0x900 [ 169.725056] ? mas_walk+0x5c7/0x7c0 [ 169.725545] do_vmi_munmap+0x1f1/0x2b0 [ 169.726039] mmap_region+0x1f9/0x2660 [ 169.726532] ? vm_mmap_pgoff+0x15c/0x3a0 [ 169.727045] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 169.727767] ? __pfx_lock_acquire+0x10/0x10 [ 169.728302] ? __pfx_mmap_region+0x10/0x10 [ 169.728841] ? security_mmap_addr+0x7d/0xa0 [ 169.729385] ? get_unmapped_area+0x1f5/0x3f0 [ 169.729954] do_mmap+0x854/0xf00 [ 169.730392] vm_mmap_pgoff+0x1a6/0x3a0 [ 169.730889] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 169.731458] ksys_mmap_pgoff+0x3af/0x500 [ 169.731964] do_syscall_64+0x3f/0x90 [ 169.732452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 169.733110] RIP: 0033:0x7fbab9f97d82 [ 169.733569] 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 [ 169.735702] RSP: 002b:00007ffd09533598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 169.736617] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbab9f97d82 [ 169.737483] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbab93d1000 [ 169.738334] RBP: 00007fbab93d1000 R08: 0000000000000009 R09: 0000000000001000 [ 169.739193] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ab68e31ec0 [ 169.740063] R13: 00007ffd095335b0 R14: 00007ffd095335e0 R15: 00007ffd09533940 [ 169.740929] [ 169.741219] [ 169.741438] Allocated by task 218: [ 169.741888] kasan_save_stack+0x22/0x50 [ 169.742403] kasan_set_track+0x25/0x30 [ 169.742913] __kasan_slab_alloc+0x59/0x70 [ 169.743435] kmem_cache_alloc+0x16b/0x370 [ 169.743958] vm_area_dup+0x20/0x160 [ 169.744419] __split_vma+0x170/0x950 [ 169.744894] split_vma+0xc6/0x110 [ 169.745331] mprotect_fixup+0x8d2/0xb30 [ 169.745838] do_mprotect_pkey+0x87e/0xd40 [ 169.746364] __x64_sys_mprotect+0x78/0xc0 [ 169.746891] do_syscall_64+0x3f/0x90 [ 169.747370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 169.748022] [ 169.748245] Freed by task 218: [ 169.748643] kasan_save_stack+0x22/0x50 [ 169.749145] kasan_set_track+0x25/0x30 [ 169.749647] kasan_save_free_info+0x2b/0x50 [ 169.750178] __kasan_slab_free+0x10a/0x190 [ 169.750719] kmem_cache_free+0x10d/0x4d0 [ 169.751232] rcu_core+0x8c8/0x2860 [ 169.751682] __do_softirq+0x1b7/0x7d4 [ 169.752161] [ 169.752377] Last potentially related work creation: [ 169.752960] kasan_save_stack+0x22/0x50 [ 169.753488] __kasan_record_aux_stack+0x8e/0xa0 [ 169.754073] __call_rcu_common.constprop.0+0x6a/0xb90 [ 169.754720] remove_vma+0x139/0x170 [ 169.755173] do_vmi_align_munmap+0xd4a/0x11f0 [ 169.755735] do_vmi_munmap+0x1f1/0x2b0 [ 169.756220] __vm_munmap+0x138/0x3a0 [ 169.756692] __x64_sys_munmap+0x59/0x80 [ 169.757218] do_syscall_64+0x3f/0x90 [ 169.757707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 169.758358] [ 169.758582] The buggy address belongs to the object at ffff88800d7421d0 [ 169.758582] which belongs to the cache vm_area_struct of size 168 [ 169.760067] The buggy address is located 88 bytes inside of [ 169.760067] freed 168-byte region [ffff88800d7421d0, ffff88800d742278) [ 169.761485] [ 169.761703] The buggy address belongs to the physical page: [ 169.762365] page:0000000030921a71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd742 [ 169.763460] memcg:ffff88800db98c01 [ 169.763889] flags: 0x100000000000200(slab|node=0|zone=1) [ 169.764537] page_type: 0xffffffff() [ 169.764992] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 169.765961] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db98c01 [ 169.766935] page dumped because: kasan: bad access detected [ 169.767644] [ 169.767873] Memory state around the buggy address: [ 169.768508] ffff88800d742100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 169.769422] ffff88800d742180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 169.770356] >ffff88800d742200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 169.771266] ^ [ 169.771860] ffff88800d742280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 169.772778] ffff88800d742300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 169.773702] ================================================================== [ 169.774773] Disabling lock debugging due to kernel taint [ 172.473621] BUG: Bad rss-counter state mm:0000000087683bf2 type:MM_FILEPAGES val:33 [ 172.475064] BUG: Bad rss-counter state mm:0000000087683bf2 type:MM_ANONPAGES val:22 [ 172.966345] BUG: Bad rss-counter state mm:00000000962e5fc1 type:MM_FILEPAGES val:33 [ 172.967609] BUG: Bad rss-counter state mm:00000000962e5fc1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57563' (ECDSA) to the list of known hosts. 2023/06/19 18:54:51 fuzzer started 2023/06/19 18:54:51 dialing manager at localhost:44161 2023/06/19 18:54:51 checking machine... 2023/06/19 18:54:51 checking revisions... [ 173.700297] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:54:51 testing simple program... [ 173.740789] cgroup: Unknown subsys name 'net' [ 173.778214] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:52:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff8562b940 RCX=0000000000000000 RDX=1ffffffff0ac5728 RSI=ffffffff813c5bf3 RDI=ffffffff87b694b8 RBP=ffffffff87b694b8 RSP=ffff88806ce09c90 R8 =ffffffff85497f20 R9 =ffffffffffffffff R10=ffffffffffffffff R11=0000001c87375b80 R12=ffffffff8562b970 R13=ffffffff87b69510 R14=176a2445312c4400 R15=ffffffff87b694a8 RIP=ffffffff813c5c13 RFL=00000006 [-----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 00007f7ba75dd900 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=00007f7ba6a70570 CR3=000000000cb78000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=693ec1a3ac45702f00000000000ae988 XMM05=b22d9164688f98070000000000145b60 XMM06=13e856d8d71426c80000000000144950 XMM07=fb795ef6d657705600000000001347d8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20202000000020200000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff888009f351c0 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800f216ec0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000092800 RIP=ffffffff814c07f1 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 00007f5280005900 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=00007f527ffcf008 CR3=000000000945a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000