syzkaller login: [ 47.131012] BUG: Bad rss-counter state mm:000000006b4cf3ee type:MM_FILEPAGES val:33 [ 47.132368] BUG: Bad rss-counter state mm:000000006b4cf3ee type:MM_ANONPAGES val:22 [ 47.309059] ================================================================== [ 47.310261] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.311511] Read of size 8 at addr ffff88800ee87140 by task sshd/221 [ 47.312670] [ 47.312957] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.314077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.315206] Call Trace: [ 47.315567] [ 47.315889] dump_stack_lvl+0x91/0xf0 [ 47.316411] print_report+0xcc/0x620 [ 47.316927] ? __virt_addr_valid+0x102/0x340 [ 47.317515] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.318171] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.318835] kasan_report+0xbe/0xf0 [ 47.319346] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.320008] vma_interval_tree_remove+0xc75/0xec0 [ 47.320651] vma_prepare+0xc54/0x11a0 [ 47.321164] __split_vma+0x5af/0x950 [ 47.321674] ? __pfx___split_vma+0x10/0x10 [ 47.322240] ? find_held_lock+0x2c/0x110 [ 47.322821] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.323434] ? lock_is_held_type+0x9f/0x120 [ 47.324025] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.324732] ? mtree_range_walk+0x632/0x900 [ 47.325366] ? mas_walk+0x5c7/0x7c0 [ 47.325907] do_vmi_munmap+0x1f1/0x2b0 [ 47.326470] mmap_region+0x1f9/0x2660 [ 47.327022] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.327613] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.328436] ? __pfx_lock_acquire+0x10/0x10 [ 47.329051] ? __pfx_mmap_region+0x10/0x10 [ 47.329658] ? security_mmap_addr+0x7d/0xa0 [ 47.330262] ? get_unmapped_area+0x1f5/0x3f0 [ 47.330907] do_mmap+0x854/0xf00 [ 47.331418] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.331990] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.332626] ksys_mmap_pgoff+0x3af/0x500 [ 47.333208] do_syscall_64+0x3f/0x90 [ 47.333759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.334498] RIP: 0033:0x7f1c1d3a6d82 [ 47.335053] 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 [ 47.337503] RSP: 002b:00007ffe48fc5bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.338552] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c1d3a6d82 [ 47.339550] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c1c7e0000 [ 47.340550] RBP: 00007f1c1c7e0000 R08: 0000000000000009 R09: 0000000000001000 [ 47.341523] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633f3919ec0 [ 47.342499] R13: 00007ffe48fc5bf0 R14: 00007ffe48fc5c20 R15: 00007ffe48fc5f80 [ 47.343498] [ 47.343835] [ 47.344086] Allocated by task 213: [ 47.344586] kasan_save_stack+0x22/0x50 [ 47.345148] kasan_set_track+0x25/0x30 [ 47.345719] __kasan_slab_alloc+0x59/0x70 [ 47.346313] kmem_cache_alloc+0x16b/0x370 [ 47.346914] vm_area_dup+0x20/0x160 [ 47.347430] __split_vma+0x170/0x950 [ 47.347960] split_vma+0xc6/0x110 [ 47.348457] mprotect_fixup+0x8d2/0xb30 [ 47.349022] do_mprotect_pkey+0x87e/0xd40 [ 47.349631] __x64_sys_mprotect+0x78/0xc0 [ 47.350206] do_syscall_64+0x3f/0x90 [ 47.350770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.351511] [ 47.351764] Freed by task 213: [ 47.352213] kasan_save_stack+0x22/0x50 [ 47.352784] kasan_set_track+0x25/0x30 [ 47.353342] kasan_save_free_info+0x2b/0x50 [ 47.353952] __kasan_slab_free+0x10a/0x190 [ 47.354567] kmem_cache_free+0x10d/0x4d0 [ 47.355170] rcu_core+0x8c8/0x2860 [ 47.355684] __do_softirq+0x1b7/0x7d4 [ 47.356216] [ 47.356461] Last potentially related work creation: [ 47.357140] kasan_save_stack+0x22/0x50 [ 47.357730] __kasan_record_aux_stack+0x8e/0xa0 [ 47.358387] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.359126] remove_vma+0x139/0x170 [ 47.359654] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.360287] do_vmi_munmap+0x1f1/0x2b0 [ 47.360829] __vm_munmap+0x138/0x3a0 [ 47.361370] __x64_sys_munmap+0x59/0x80 [ 47.361945] do_syscall_64+0x3f/0x90 [ 47.362493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.363232] [ 47.363487] The buggy address belongs to the object at ffff88800ee870e8 [ 47.363487] which belongs to the cache vm_area_struct of size 168 [ 47.365172] The buggy address is located 88 bytes inside of [ 47.365172] freed 168-byte region [ffff88800ee870e8, ffff88800ee87190) [ 47.366823] [ 47.367077] The buggy address belongs to the physical page: [ 47.367852] page:00000000820d1216 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee87 [ 47.369095] memcg:ffff888016ad9401 [ 47.369587] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.370329] page_type: 0xffffffff() [ 47.370858] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.371907] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ad9401 [ 47.372912] page dumped because: kasan: bad access detected [ 47.373665] [ 47.373904] Memory state around the buggy address: [ 47.374557] ffff88800ee87000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.375552] ffff88800ee87080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 47.376513] >ffff88800ee87100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.377496] ^ [ 47.378218] ffff88800ee87180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 47.379205] ffff88800ee87200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 47.380189] ================================================================== [ 47.381226] Disabling lock debugging due to kernel taint [ 50.290092] BUG: Bad rss-counter state mm:00000000d4c936a9 type:MM_FILEPAGES val:33 [ 50.291486] BUG: Bad rss-counter state mm:00000000d4c936a9 type:MM_ANONPAGES val:22 [ 50.763942] BUG: Bad rss-counter state mm:00000000846079a9 type:MM_FILEPAGES val:33 [ 50.765108] BUG: Bad rss-counter state mm:00000000846079a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60933' (ECDSA) to the list of known hosts. 2023/06/20 00:12:56 fuzzer started 2023/06/20 00:12:57 dialing manager at localhost:44161 2023/06/20 00:12:57 checking machine... 2023/06/20 00:12:57 checking revisions... [ 51.462951] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:12:57 testing simple program... [ 51.529336] cgroup: Unknown subsys name 'net' [ 51.588097] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:12:40 Registers: info registers vcpu 0 RAX=1ffffffff0c0a8d7 RBX=ffffffff860546b8 RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864baff8 RDI=ffffffff8605469c RBP=ffffffff8605469c RSP=ffff88806ce099e0 R8 =ffffffff864baff8 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffffffff860546d8 R13=ffffffff8605469c R14=ffffffff8605469c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 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=00007f6b738f5cc0 CR3=0000000009a2a000 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=2036353a32313a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a32313a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f5b2069b000 RBX=00007fffd83b1c40 RCX=00007fffd83b1af0 RDX=0000000000000002 RSI=000000000000002c RDI=00007f5b206cc060 RBP=00007fffd83b1d70 RSP=fffffe0000049fd0 R8 =000055c8fcd348b0 R9 =00007fffd83b1c70 R10=000000000000002c R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84601260 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5b1fb2a900 00000000 00000000 GS =0000 0000000000000000 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=00007f5b2069b3ec CR3=000000000ccf6000 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=6720646572637465733a4d41503d706f 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