syzkaller login: [ 30.109407] BUG: Bad rss-counter state mm:00000000510e6151 type:MM_FILEPAGES val:33 [ 30.110832] BUG: Bad rss-counter state mm:00000000510e6151 type:MM_ANONPAGES val:22 [ 30.149922] ================================================================== [ 30.150875] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.151823] Read of size 8 at addr ffff88800f635c20 by task sshd/221 [ 30.152685] [ 30.152903] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.153779] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.154801] Call Trace: [ 30.155128] [ 30.155412] dump_stack_lvl+0x91/0xf0 [ 30.155913] print_report+0xcc/0x620 [ 30.156418] ? __virt_addr_valid+0x102/0x340 [ 30.156981] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.157610] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.158237] kasan_report+0xbe/0xf0 [ 30.158722] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.159360] vma_interval_tree_remove+0xc75/0xec0 [ 30.159980] vma_prepare+0xc54/0x11a0 [ 30.160475] __split_vma+0x5af/0x950 [ 30.160964] ? __pfx___split_vma+0x10/0x10 [ 30.161530] ? find_held_lock+0x2c/0x110 [ 30.162051] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.162626] ? lock_is_held_type+0x9f/0x120 [ 30.163172] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.163792] ? mtree_range_walk+0x632/0x900 [ 30.164350] ? mas_walk+0x5c7/0x7c0 [ 30.164834] do_vmi_munmap+0x1f1/0x2b0 [ 30.165353] mmap_region+0x1f9/0x2660 [ 30.165837] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.166358] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.167095] ? __pfx_lock_acquire+0x10/0x10 [ 30.167646] ? __pfx_mmap_region+0x10/0x10 [ 30.168185] ? security_mmap_addr+0x7d/0xa0 [ 30.168727] ? get_unmapped_area+0x1f5/0x3f0 [ 30.169297] do_mmap+0x854/0xf00 [ 30.169747] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.170251] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.170824] ksys_mmap_pgoff+0x3af/0x500 [ 30.171334] do_syscall_64+0x3f/0x90 [ 30.171823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.172472] RIP: 0033:0x7f5e3d504d82 [ 30.172930] 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 [ 30.175087] RSP: 002b:00007ffe7ac44748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.176000] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e3d504d82 [ 30.176862] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e3c93e000 [ 30.177732] RBP: 00007f5e3c93e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.178587] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b15838ec0 [ 30.179455] R13: 00007ffe7ac44760 R14: 00007ffe7ac44790 R15: 00007ffe7ac44af0 [ 30.180311] [ 30.180602] [ 30.180818] Allocated by task 214: [ 30.181260] kasan_save_stack+0x22/0x50 [ 30.181776] kasan_set_track+0x25/0x30 [ 30.182271] __kasan_slab_alloc+0x59/0x70 [ 30.182802] kmem_cache_alloc+0x16b/0x370 [ 30.183324] vm_area_dup+0x20/0x160 [ 30.183783] __split_vma+0x170/0x950 [ 30.184258] split_vma+0xc6/0x110 [ 30.184702] mprotect_fixup+0x8d2/0xb30 [ 30.185224] do_mprotect_pkey+0x87e/0xd40 [ 30.185753] __x64_sys_mprotect+0x78/0xc0 [ 30.186284] do_syscall_64+0x3f/0x90 [ 30.186765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.187406] [ 30.187628] Freed by task 19: [ 30.188008] kasan_save_stack+0x22/0x50 [ 30.188518] kasan_set_track+0x25/0x30 [ 30.189015] kasan_save_free_info+0x2b/0x50 [ 30.189572] __kasan_slab_free+0x10a/0x190 [ 30.190108] kmem_cache_free+0x10d/0x4d0 [ 30.190622] rcu_core+0x8c8/0x2860 [ 30.191075] __do_softirq+0x1b7/0x7d4 [ 30.191554] [ 30.191771] Last potentially related work creation: [ 30.192362] kasan_save_stack+0x22/0x50 [ 30.192869] __kasan_record_aux_stack+0x8e/0xa0 [ 30.193458] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.194104] remove_vma+0x139/0x170 [ 30.194562] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.195131] do_vmi_munmap+0x1f1/0x2b0 [ 30.195629] __vm_munmap+0x138/0x3a0 [ 30.196105] __x64_sys_munmap+0x59/0x80 [ 30.196607] do_syscall_64+0x3f/0x90 [ 30.197084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.197757] [ 30.197975] The buggy address belongs to the object at ffff88800f635bc8 [ 30.197975] which belongs to the cache vm_area_struct of size 168 [ 30.199444] The buggy address is located 88 bytes inside of [ 30.199444] freed 168-byte region [ffff88800f635bc8, ffff88800f635c70) [ 30.200861] [ 30.201078] The buggy address belongs to the physical page: [ 30.201768] page:00000000d8024125 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf635 [ 30.202859] memcg:ffff888018b6ac01 [ 30.203284] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.203933] page_type: 0xffffffff() [ 30.204392] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.205328] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018b6ac01 [ 30.206251] page dumped because: kasan: bad access detected [ 30.206916] [ 30.207132] Memory state around the buggy address: [ 30.207717] ffff88800f635b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.208575] ffff88800f635b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.209447] >ffff88800f635c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.210301] ^ [ 30.210836] ffff88800f635c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.211706] ffff88800f635d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.212572] ================================================================== [ 30.213639] Disabling lock debugging due to kernel taint [ 32.421862] BUG: Bad rss-counter state mm:00000000ea9af97c type:MM_FILEPAGES val:33 [ 32.423127] BUG: Bad rss-counter state mm:00000000ea9af97c type:MM_ANONPAGES val:22 [ 32.905620] BUG: Bad rss-counter state mm:000000002721b360 type:MM_FILEPAGES val:33 [ 32.907054] BUG: Bad rss-counter state mm:000000002721b360 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61523' (ECDSA) to the list of known hosts. 2023/06/21 04:24:53 fuzzer started 2023/06/21 04:24:53 dialing manager at localhost:36067 2023/06/21 04:24:53 checking machine... 2023/06/21 04:24:53 checking revisions... [ 33.591981] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:24:53 testing simple program... [ 33.639275] cgroup: Unknown subsys name 'net' [ 33.689305] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:24:52 Registers: info registers vcpu 0 RAX=fffffffffba57435 RBX=ffffffff85e03b34 RCX=ffffffff8185af32 RDX=0000000000000000 RSI=ffffffff86141712 RDI=ffffffff85e03b20 RBP=ffffffff85e03b20 RSP=ffff88801455f6e8 R8 =ffffffff86141712 R9 =ffff88801455f7e0 R10=0000000000038001 R11=0000000000022457 R12=ffffffff85e03b48 R13=ffffffff85e03b20 R14=ffffffff85e03b20 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f7d948b8900 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=00007f7d93d38130 CR3=000000000d662000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0042c7be2d04c66a00000000000ae988 XMM05=8cdcd881d856d7db0000000000132ad0 XMM06=c291bd5c70af25b900000000001318c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880144ab680 RSI=ffffffff8139349d RDI=0000000000000000 RBP=ffff888019c0a000 RSP=ffff888017e4f828 R8 =0000000000000001 R9 =ffffed1002fc9eef R10=ffff888017e4f77f R11=00000000000b6a61 R12=ffff8880169fa3c0 R13=0000000000000000 R14=ffff888019c0a579 R15=ffff888019c0a600 RIP=ffffffff814c086b 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 00007fb021632900 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=00007fb021be9618 CR3=000000000dff2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000