syzkaller login: [ 31.142534] BUG: Bad rss-counter state mm:00000000865dc530 type:MM_FILEPAGES val:33 [ 31.144030] BUG: Bad rss-counter state mm:00000000865dc530 type:MM_ANONPAGES val:22 [ 31.186966] ================================================================== [ 31.187862] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.188821] Read of size 8 at addr ffff88800c41e4e0 by task sshd/221 [ 31.189580] [ 31.189799] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.190686] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.191670] Call Trace: [ 31.191994] [ 31.192280] dump_stack_lvl+0x91/0xf0 [ 31.192775] print_report+0xcc/0x620 [ 31.193267] ? __virt_addr_valid+0x102/0x340 [ 31.193816] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.194465] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.195081] kasan_report+0xbe/0xf0 [ 31.195558] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.196184] vma_interval_tree_remove+0xc75/0xec0 [ 31.196796] vma_prepare+0xc54/0x11a0 [ 31.197272] __split_vma+0x5af/0x950 [ 31.197746] ? __pfx___split_vma+0x10/0x10 [ 31.198290] ? find_held_lock+0x2c/0x110 [ 31.198806] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.199375] ? lock_is_held_type+0x9f/0x120 [ 31.199914] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.200517] ? mtree_range_walk+0x632/0x900 [ 31.201075] ? mas_walk+0x5c7/0x7c0 [ 31.201549] do_vmi_munmap+0x1f1/0x2b0 [ 31.202037] mmap_region+0x1f9/0x2660 [ 31.202548] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.203062] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.203785] ? __pfx_lock_acquire+0x10/0x10 [ 31.204326] ? __pfx_mmap_region+0x10/0x10 [ 31.204856] ? security_mmap_addr+0x7d/0xa0 [ 31.205389] ? get_unmapped_area+0x1f5/0x3f0 [ 31.205940] do_mmap+0x854/0xf00 [ 31.206401] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.206900] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.207469] ksys_mmap_pgoff+0x3af/0x500 [ 31.207973] do_syscall_64+0x3f/0x90 [ 31.208451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.209099] RIP: 0033:0x7f00d8913d82 [ 31.209552] 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 [ 31.211690] RSP: 002b:00007ffdae018138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.212591] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f00d8913d82 [ 31.213439] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f00d7d4d000 [ 31.214295] RBP: 00007f00d7d4d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.215142] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0dea82ec0 [ 31.215996] R13: 00007ffdae018150 R14: 00007ffdae018180 R15: 00007ffdae0184e0 [ 31.216861] [ 31.217152] [ 31.217368] Allocated by task 214: [ 31.217790] kasan_save_stack+0x22/0x50 [ 31.218312] kasan_set_track+0x25/0x30 [ 31.218804] __kasan_slab_alloc+0x59/0x70 [ 31.219324] kmem_cache_alloc+0x16b/0x370 [ 31.219840] vm_area_dup+0x20/0x160 [ 31.220295] __split_vma+0x170/0x950 [ 31.220761] split_vma+0xc6/0x110 [ 31.221195] mprotect_fixup+0x8d2/0xb30 [ 31.221695] do_mprotect_pkey+0x87e/0xd40 [ 31.222231] __x64_sys_mprotect+0x78/0xc0 [ 31.222750] do_syscall_64+0x3f/0x90 [ 31.223239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223882] [ 31.224097] Freed by task 214: [ 31.224495] kasan_save_stack+0x22/0x50 [ 31.225003] kasan_set_track+0x25/0x30 [ 31.225492] kasan_save_free_info+0x2b/0x50 [ 31.226026] __kasan_slab_free+0x10a/0x190 [ 31.226573] kmem_cache_free+0x10d/0x4d0 [ 31.227078] rcu_core+0x8c8/0x2860 [ 31.227568] __do_softirq+0x1b7/0x7d4 [ 31.228045] [ 31.228263] Last potentially related work creation: [ 31.228839] kasan_save_stack+0x22/0x50 [ 31.229338] __kasan_record_aux_stack+0x8e/0xa0 [ 31.229910] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.230561] remove_vma+0x139/0x170 [ 31.231009] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.231572] do_vmi_munmap+0x1f1/0x2b0 [ 31.232057] __vm_munmap+0x138/0x3a0 [ 31.232524] __x64_sys_munmap+0x59/0x80 [ 31.233019] do_syscall_64+0x3f/0x90 [ 31.233492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234136] [ 31.234350] The buggy address belongs to the object at ffff88800c41e488 [ 31.234350] which belongs to the cache vm_area_struct of size 168 [ 31.235839] The buggy address is located 88 bytes inside of [ 31.235839] freed 168-byte region [ffff88800c41e488, ffff88800c41e530) [ 31.237230] [ 31.237443] The buggy address belongs to the physical page: [ 31.238114] page:000000008102661a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc41e [ 31.239207] memcg:ffff888009762c01 [ 31.239636] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.240278] page_type: 0xffffffff() [ 31.240726] raw: 0100000000000200 ffff8880087a0c80 ffffea0000325dc0 dead000000000006 [ 31.241644] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009762c01 [ 31.242556] page dumped because: kasan: bad access detected [ 31.243212] [ 31.243423] Memory state around the buggy address: [ 31.244002] ffff88800c41e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.244862] ffff88800c41e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.245718] >ffff88800c41e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.246570] ^ [ 31.247326] ffff88800c41e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.248176] ffff88800c41e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.249018] ================================================================== [ 31.249978] Disabling lock debugging due to kernel taint [ 33.639787] BUG: Bad rss-counter state mm:0000000091b3fff8 type:MM_FILEPAGES val:33 [ 33.640899] BUG: Bad rss-counter state mm:0000000091b3fff8 type:MM_ANONPAGES val:22 [ 34.203010] BUG: Bad rss-counter state mm:00000000a260e238 type:MM_FILEPAGES val:33 [ 34.204274] BUG: Bad rss-counter state mm:00000000a260e238 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13616' (ECDSA) to the list of known hosts. 2023/06/20 19:13:31 fuzzer started 2023/06/20 19:13:31 dialing manager at localhost:36067 2023/06/20 19:13:31 checking machine... 2023/06/20 19:13:31 checking revisions... [ 34.895665] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:13:31 testing simple program... [ 34.952666] cgroup: Unknown subsys name 'net' [ 35.003338] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:13:30 Registers: info registers vcpu 0 RAX=ffffffff84511028 RBX=ffffffff813ad470 RCX=ffffffff860a1401 RDX=1ffff11001ddcf46 RSI=ffffffff84511028 RDI=ffff88800eee7aa0 RBP=ffff88800eee7a70 RSP=ffff88800eee79d0 R8 =ffffffff860a1444 R9 =ffff88800eee7a18 R10=0000000000038001 R11=000000000000792d R12=ffff88800eee7aa0 R13=0000000000000000 R14=ffff8880146f51c0 R15=ffff88801a25fb30 RIP=ffffffff813ad470 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa5ee975700 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=00007f0243f23050 CR3=000000000e62c000 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=2030333a33313a3931203032206e754a XMM01=5f687373203a726f727265203a5d3833 XMM02=632079746972756365732078756e694c XMM03=742064656c696146203a656d616e7962 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a33313a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880160eb680 RSI=ffffffff83ab1b1f RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888016dc7500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000098b0000098b R12=0000000000000000 R13=0000000000000030 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff812d8650 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 00007ff3be90b900 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=00007ffebed1d000 CR3=000000000c6b4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000