syzkaller login: [ 32.087927] BUG: Bad rss-counter state mm:0000000055563e44 type:MM_FILEPAGES val:33 [ 32.089195] BUG: Bad rss-counter state mm:0000000055563e44 type:MM_ANONPAGES val:22 [ 32.129978] ================================================================== [ 32.130987] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.131998] Read of size 8 at addr ffff88800ce8d058 by task sshd/219 [ 32.132828] [ 32.133066] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.134002] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.135075] Call Trace: [ 32.135489] [ 32.135796] dump_stack_lvl+0x91/0xf0 [ 32.136331] print_report+0xcc/0x620 [ 32.136851] ? __virt_addr_valid+0x102/0x340 [ 32.137448] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.138134] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.138797] kasan_report+0xbe/0xf0 [ 32.139328] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.140015] vma_interval_tree_remove+0xc75/0xec0 [ 32.140679] vma_prepare+0xc54/0x11a0 [ 32.141210] __split_vma+0x5af/0x950 [ 32.141730] ? __pfx___split_vma+0x10/0x10 [ 32.142323] ? find_held_lock+0x2c/0x110 [ 32.142904] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.143529] ? lock_is_held_type+0x9f/0x120 [ 32.144125] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.144791] ? mtree_range_walk+0x632/0x900 [ 32.145404] ? mas_walk+0x5c7/0x7c0 [ 32.145922] do_vmi_munmap+0x1f1/0x2b0 [ 32.146478] mmap_region+0x1f9/0x2660 [ 32.147005] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.147574] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.148361] ? __pfx_lock_acquire+0x10/0x10 [ 32.148947] ? __pfx_mmap_region+0x10/0x10 [ 32.149533] ? security_mmap_addr+0x7d/0xa0 [ 32.150148] ? get_unmapped_area+0x1f5/0x3f0 [ 32.150754] do_mmap+0x854/0xf00 [ 32.151231] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.151772] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.152391] ksys_mmap_pgoff+0x3af/0x500 [ 32.152944] do_syscall_64+0x3f/0x90 [ 32.153468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.154184] RIP: 0033:0x7f5b7ef61d82 [ 32.154692] 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 [ 32.157051] RSP: 002b:00007ffe5fd82568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.158052] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b7ef61d82 [ 32.158984] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b7e39b000 [ 32.159924] RBP: 00007f5b7e39b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.160869] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563d443ef70 [ 32.161807] R13: 00007ffe5fd82580 R14: 00007ffe5fd825b0 R15: 00007ffe5fd82910 [ 32.162783] [ 32.163105] [ 32.163345] Allocated by task 212: [ 32.163822] kasan_save_stack+0x22/0x50 [ 32.164384] kasan_set_track+0x25/0x30 [ 32.164987] __kasan_slab_alloc+0x59/0x70 [ 32.165576] kmem_cache_alloc+0x16b/0x370 [ 32.166157] vm_area_dup+0x20/0x160 [ 32.166658] __split_vma+0x170/0x950 [ 32.167176] split_vma+0xc6/0x110 [ 32.167665] mprotect_fixup+0x8d2/0xb30 [ 32.168219] do_mprotect_pkey+0x87e/0xd40 [ 32.168798] __x64_sys_mprotect+0x78/0xc0 [ 32.169370] do_syscall_64+0x3f/0x90 [ 32.169888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.170624] [ 32.170864] Freed by task 212: [ 32.171296] kasan_save_stack+0x22/0x50 [ 32.171850] kasan_set_track+0x25/0x30 [ 32.172403] kasan_save_free_info+0x2b/0x50 [ 32.172997] __kasan_slab_free+0x10a/0x190 [ 32.173594] kmem_cache_free+0x10d/0x4d0 [ 32.174161] rcu_core+0x8c8/0x2860 [ 32.174647] __do_softirq+0x1b7/0x7d4 [ 32.175178] [ 32.175418] Last potentially related work creation: [ 32.176065] kasan_save_stack+0x22/0x50 [ 32.176623] __kasan_record_aux_stack+0x8e/0xa0 [ 32.177250] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.177969] remove_vma+0x139/0x170 [ 32.178471] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.179090] do_vmi_munmap+0x1f1/0x2b0 [ 32.179625] __vm_munmap+0x138/0x3a0 [ 32.180138] __x64_sys_munmap+0x59/0x80 [ 32.180697] do_syscall_64+0x3f/0x90 [ 32.181222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.181927] [ 32.182186] The buggy address belongs to the object at ffff88800ce8d000 [ 32.182186] which belongs to the cache vm_area_struct of size 168 [ 32.183816] The buggy address is located 88 bytes inside of [ 32.183816] freed 168-byte region [ffff88800ce8d000, ffff88800ce8d0a8) [ 32.185384] [ 32.185619] The buggy address belongs to the physical page: [ 32.186363] page:00000000f29eb32f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xce8d [ 32.187560] memcg:ffff88800dbc5c01 [ 32.188029] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.188743] page_type: 0xffffffff() [ 32.189241] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.190255] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbc5c01 [ 32.191256] page dumped because: kasan: bad access detected [ 32.191983] [ 32.192217] Memory state around the buggy address: [ 32.192853] ffff88800ce8cf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 32.193802] ffff88800ce8cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.194778] >ffff88800ce8d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.195718] ^ [ 32.196521] ffff88800ce8d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.197469] ffff88800ce8d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.198423] ================================================================== [ 32.199729] Disabling lock debugging due to kernel taint [ 34.851057] BUG: Bad rss-counter state mm:00000000449797fe type:MM_FILEPAGES val:33 [ 34.852217] BUG: Bad rss-counter state mm:00000000449797fe type:MM_ANONPAGES val:22 [ 35.230841] BUG: Bad rss-counter state mm:000000008798f101 type:MM_FILEPAGES val:33 [ 35.231870] BUG: Bad rss-counter state mm:000000008798f101 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41914' (ECDSA) to the list of known hosts. 2023/06/19 21:10:00 fuzzer started 2023/06/19 21:10:01 dialing manager at localhost:44161 2023/06/19 21:10:01 checking machine... 2023/06/19 21:10:01 checking revisions... [ 35.964073] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:10:01 testing simple program... [ 36.008253] cgroup: Unknown subsys name 'net' [ 36.055557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:09:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fe7f7c51477 RCX=0000000000000000 RDX=ffff888016f93680 RSI=ffffffff813a0ad6 RDI=0000000000000001 RBP=00007fe7f7c51477 RSP=ffff88800d0178e8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800d0179f0 R13=0000000000000000 R14=ffff888016f93680 R15=0000000000000cc0 RIP=ffffffff811fc7d5 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 00007fe7f775e900 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=00007ffcc657a000 CR3=000000001a0d2000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f3cd642a000 CR3=000000001a1f0000 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=2030303a30313a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a30313a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000