syzkaller login: [ 30.554373] BUG: Bad rss-counter state mm:00000000b5522748 type:MM_FILEPAGES val:33 [ 30.555871] BUG: Bad rss-counter state mm:00000000b5522748 type:MM_ANONPAGES val:22 [ 30.716800] ================================================================== [ 30.717915] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.719118] Read of size 8 at addr ffff88800df2ddf0 by task sshd/221 [ 30.720109] [ 30.720332] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.721210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.722208] Call Trace: [ 30.722531] [ 30.722824] dump_stack_lvl+0x91/0xf0 [ 30.723350] print_report+0xcc/0x620 [ 30.723857] ? __virt_addr_valid+0x102/0x340 [ 30.724407] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.725036] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.725674] kasan_report+0xbe/0xf0 [ 30.726146] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.726767] vma_interval_tree_remove+0xc75/0xec0 [ 30.727410] vma_prepare+0xc54/0x11a0 [ 30.727904] __split_vma+0x5af/0x950 [ 30.728394] ? __pfx___split_vma+0x10/0x10 [ 30.728931] ? find_held_lock+0x2c/0x110 [ 30.729469] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.730043] ? lock_is_held_type+0x9f/0x120 [ 30.730599] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.731204] ? mtree_range_walk+0x632/0x900 [ 30.731762] ? mas_walk+0x5c7/0x7c0 [ 30.732242] do_vmi_munmap+0x1f1/0x2b0 [ 30.732728] mmap_region+0x1f9/0x2660 [ 30.733215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.733746] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.734486] ? __pfx_lock_acquire+0x10/0x10 [ 30.735031] ? __pfx_mmap_region+0x10/0x10 [ 30.735568] ? security_mmap_addr+0x7d/0xa0 [ 30.736120] ? get_unmapped_area+0x1f5/0x3f0 [ 30.736684] do_mmap+0x854/0xf00 [ 30.737143] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.737645] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.738216] ksys_mmap_pgoff+0x3af/0x500 [ 30.738729] do_syscall_64+0x3f/0x90 [ 30.739224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739918] RIP: 0033:0x7f01cf0f0d82 [ 30.740383] 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 [ 30.742520] RSP: 002b:00007ffca4e83d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.743466] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01cf0f0d82 [ 30.744352] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f01ce52a000 [ 30.745201] RBP: 00007f01ce52a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.746043] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf49236d90 [ 30.746897] R13: 00007ffca4e83d50 R14: 00007ffca4e83d80 R15: 00007ffca4e840e0 [ 30.747767] [ 30.748060] [ 30.748274] Allocated by task 214: [ 30.748724] kasan_save_stack+0x22/0x50 [ 30.749244] kasan_set_track+0x25/0x30 [ 30.749741] __kasan_slab_alloc+0x59/0x70 [ 30.750283] kmem_cache_alloc+0x16b/0x370 [ 30.750813] vm_area_dup+0x20/0x160 [ 30.751265] __split_vma+0x170/0x950 [ 30.751749] split_vma+0xc6/0x110 [ 30.752203] mprotect_fixup+0x8d2/0xb30 [ 30.752719] do_mprotect_pkey+0x87e/0xd40 [ 30.753247] __x64_sys_mprotect+0x78/0xc0 [ 30.753772] do_syscall_64+0x3f/0x90 [ 30.754266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754923] [ 30.755147] Freed by task 214: [ 30.755559] kasan_save_stack+0x22/0x50 [ 30.756078] kasan_set_track+0x25/0x30 [ 30.756590] kasan_save_free_info+0x2b/0x50 [ 30.757121] __kasan_slab_free+0x10a/0x190 [ 30.757674] kmem_cache_free+0x10d/0x4d0 [ 30.758179] rcu_core+0x8c8/0x2860 [ 30.758635] __do_softirq+0x1b7/0x7d4 [ 30.759127] [ 30.759361] Last potentially related work creation: [ 30.759966] kasan_save_stack+0x22/0x50 [ 30.760482] __kasan_record_aux_stack+0x8e/0xa0 [ 30.761082] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.761734] remove_vma+0x139/0x170 [ 30.762189] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.762766] do_vmi_munmap+0x1f1/0x2b0 [ 30.763260] __vm_munmap+0x138/0x3a0 [ 30.763751] __x64_sys_munmap+0x59/0x80 [ 30.764248] do_syscall_64+0x3f/0x90 [ 30.764733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765405] [ 30.765623] Second to last potentially related work creation: [ 30.766316] kasan_save_stack+0x22/0x50 [ 30.766815] __kasan_record_aux_stack+0x8e/0xa0 [ 30.767408] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.768079] remove_vma+0x139/0x170 [ 30.768532] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.769097] do_vmi_munmap+0x1f1/0x2b0 [ 30.769580] mmap_region+0x1f9/0x2660 [ 30.770063] do_mmap+0x854/0xf00 [ 30.770497] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.770988] ksys_mmap_pgoff+0x7d/0x500 [ 30.771517] do_syscall_64+0x3f/0x90 [ 30.771991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.772643] [ 30.772857] The buggy address belongs to the object at ffff88800df2dd98 [ 30.772857] which belongs to the cache vm_area_struct of size 168 [ 30.774363] The buggy address is located 88 bytes inside of [ 30.774363] freed 168-byte region [ffff88800df2dd98, ffff88800df2de40) [ 30.775793] [ 30.776009] The buggy address belongs to the physical page: [ 30.776673] page:00000000a16fc319 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf2d [ 30.777754] memcg:ffff88800df3b801 [ 30.778186] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.778839] page_type: 0xffffffff() [ 30.779289] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.780240] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df3b801 [ 30.781151] page dumped because: kasan: bad access detected [ 30.781835] [ 30.782051] Memory state around the buggy address: [ 30.782631] ffff88800df2dc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.783514] ffff88800df2dd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.784389] >ffff88800df2dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.785272] ^ [ 30.786115] ffff88800df2de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.786964] ffff88800df2de80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.787847] ================================================================== [ 30.789176] Disabling lock debugging due to kernel taint [ 32.695601] BUG: Bad rss-counter state mm:000000003b4be839 type:MM_FILEPAGES val:33 [ 32.696549] BUG: Bad rss-counter state mm:000000003b4be839 type:MM_ANONPAGES val:22 [ 33.177303] BUG: Bad rss-counter state mm:00000000ed8c88ff type:MM_FILEPAGES val:33 [ 33.178300] BUG: Bad rss-counter state mm:00000000ed8c88ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45630' (ECDSA) to the list of known hosts. 2023/06/20 22:51:10 fuzzer started 2023/06/20 22:51:10 dialing manager at localhost:36067 2023/06/20 22:51:10 checking machine... 2023/06/20 22:51:10 checking revisions... [ 33.923878] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:51:10 testing simple program... [ 33.980386] cgroup: Unknown subsys name 'net' [ 34.061799] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:51:10 Registers: info registers vcpu 0 RAX=ffff88808ffc8b00 RBX=0000000000000000 RCX=0000000000000000 RDX=0000777f80000000 RSI=ffff88800ffc8b00 RDI=ffff888000000000 RBP=ffffffff81ef10be RSP=ffff8880167dfd58 R8 =ffffea0000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800ffc8b00 R13=ffff8880087b23c0 R14=ffffffff81ef10be R15=ffff88800b5be840 RIP=ffffffff8180c995 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 00007ff74213f900 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=00007ffcc8bb8000 CR3=0000000019c9c000 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=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 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000002 RCX=ffffffff864b6d1e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b6d22 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09fe8 R15=ffff88806cf09a98 RIP=ffffffff81130bc1 RFL=00000286 [--S--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 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=00007f982aeb70e0 CR3=000000000d68e000 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=665beff7e548a5ad2c4b6a8138aa6c16 XMM02=ec2efd57dc4c00df000000000011d468 XMM03=eaf9bdcf9ec5cc95000000000011d538 XMM04=13dbf7d4d39b3b5800000000000ae988 XMM05=e4cb8bb95a7664b60000000000132dd8 XMM06=86af357cb48cca130000000000131c40 XMM07=e042d86d42eb936e0000000000121ef8 XMM08=eaf9bdcf9ec5cc95000000000011d538 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000