syzkaller login: [ 42.908576] BUG: Bad rss-counter state mm:00000000df26cdc5 type:MM_FILEPAGES val:33 [ 42.910466] BUG: Bad rss-counter state mm:00000000df26cdc5 type:MM_ANONPAGES val:22 [ 43.076172] ================================================================== [ 43.077081] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.077994] Read of size 8 at addr ffff88800e9a6968 by task sshd/221 [ 43.078850] [ 43.079064] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.079907] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.080844] Call Trace: [ 43.081240] [ 43.081539] dump_stack_lvl+0x91/0xf0 [ 43.082020] print_report+0xcc/0x620 [ 43.082487] ? __virt_addr_valid+0x102/0x340 [ 43.083022] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.083617] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.084218] kasan_report+0xbe/0xf0 [ 43.084681] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.085283] vma_interval_tree_remove+0xc75/0xec0 [ 43.085876] vma_prepare+0xc54/0x11a0 [ 43.086339] __split_vma+0x5af/0x950 [ 43.086799] ? __pfx___split_vma+0x10/0x10 [ 43.087312] ? find_held_lock+0x2c/0x110 [ 43.087816] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.088365] ? lock_is_held_type+0x9f/0x120 [ 43.088887] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.089472] ? mtree_range_walk+0x632/0x900 [ 43.090036] ? mas_walk+0x5c7/0x7c0 [ 43.090503] do_vmi_munmap+0x1f1/0x2b0 [ 43.090980] mmap_region+0x1f9/0x2660 [ 43.091449] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.091944] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.092641] ? __pfx_lock_acquire+0x10/0x10 [ 43.093155] ? __pfx_mmap_region+0x10/0x10 [ 43.093674] ? security_mmap_addr+0x7d/0xa0 [ 43.094185] ? get_unmapped_area+0x1f5/0x3f0 [ 43.094715] do_mmap+0x854/0xf00 [ 43.095141] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.095626] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.096172] ksys_mmap_pgoff+0x3af/0x500 [ 43.096665] do_syscall_64+0x3f/0x90 [ 43.097126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.097755] RIP: 0033:0x7ff76c4d9d82 [ 43.098197] 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 [ 43.100242] RSP: 002b:00007ffc65735258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.101115] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff76c4d9d82 [ 43.101966] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff76b913000 [ 43.102792] RBP: 00007ff76b913000 R08: 0000000000000009 R09: 0000000000001000 [ 43.103628] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6c88cff70 [ 43.104466] R13: 00007ffc65735270 R14: 00007ffc657352a0 R15: 00007ffc65735600 [ 43.105312] [ 43.105626] [ 43.105841] Allocated by task 214: [ 43.106271] kasan_save_stack+0x22/0x50 [ 43.106776] kasan_set_track+0x25/0x30 [ 43.107264] __kasan_slab_alloc+0x59/0x70 [ 43.107792] kmem_cache_alloc+0x16b/0x370 [ 43.108302] vm_area_dup+0x20/0x160 [ 43.108755] __split_vma+0x170/0x950 [ 43.109224] split_vma+0xc6/0x110 [ 43.109693] mprotect_fixup+0x8d2/0xb30 [ 43.110190] do_mprotect_pkey+0x87e/0xd40 [ 43.110714] __x64_sys_mprotect+0x78/0xc0 [ 43.111229] do_syscall_64+0x3f/0x90 [ 43.111702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.112343] [ 43.112566] Freed by task 214: [ 43.112956] kasan_save_stack+0x22/0x50 [ 43.113457] kasan_set_track+0x25/0x30 [ 43.113957] kasan_save_free_info+0x2b/0x50 [ 43.114488] __kasan_slab_free+0x10a/0x190 [ 43.115018] kmem_cache_free+0x10d/0x4d0 [ 43.115520] rcu_core+0x8c8/0x2860 [ 43.115959] __do_softirq+0x1b7/0x7d4 [ 43.116435] [ 43.116659] Last potentially related work creation: [ 43.117239] kasan_save_stack+0x22/0x50 [ 43.117767] __kasan_record_aux_stack+0x8e/0xa0 [ 43.118336] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.118971] remove_vma+0x139/0x170 [ 43.119443] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.120149] do_vmi_munmap+0x1f1/0x2b0 [ 43.120747] __vm_munmap+0x138/0x3a0 [ 43.121318] __x64_sys_munmap+0x59/0x80 [ 43.121967] do_syscall_64+0x3f/0x90 [ 43.122551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.123335] [ 43.123594] The buggy address belongs to the object at ffff88800e9a6910 [ 43.123594] which belongs to the cache vm_area_struct of size 168 [ 43.125403] The buggy address is located 88 bytes inside of [ 43.125403] freed 168-byte region [ffff88800e9a6910, ffff88800e9a69b8) [ 43.127157] [ 43.127421] The buggy address belongs to the physical page: [ 43.128241] page:00000000df5e9ed0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9a6 [ 43.129585] memcg:ffff88800e857101 [ 43.130102] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.130965] page_type: 0xffffffff() [ 43.131511] raw: 0100000000000200 ffff88800879fc80 ffffea000032e800 dead000000000007 [ 43.132642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e857101 [ 43.133735] page dumped because: kasan: bad access detected [ 43.134502] [ 43.134722] Memory state around the buggy address: [ 43.135315] ffff88800e9a6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 43.136174] ffff88800e9a6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 43.137028] >ffff88800e9a6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.137895] ^ [ 43.138682] ffff88800e9a6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 43.139540] ffff88800e9a6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.140510] ================================================================== [ 43.141401] Disabling lock debugging due to kernel taint [ 45.010460] BUG: Bad rss-counter state mm:00000000fcffc7d5 type:MM_FILEPAGES val:33 [ 45.011099] BUG: Bad rss-counter state mm:00000000fcffc7d5 type:MM_ANONPAGES val:22 [ 45.559975] BUG: Bad rss-counter state mm:000000008bdabe62 type:MM_FILEPAGES val:33 [ 45.561164] BUG: Bad rss-counter state mm:000000008bdabe62 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64474' (ECDSA) to the list of known hosts. 2023/06/20 03:57:17 fuzzer started 2023/06/20 03:57:17 dialing manager at localhost:44161 2023/06/20 03:57:17 checking machine... 2023/06/20 03:57:17 checking revisions... [ 46.215062] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:57:17 testing simple program... [ 46.261846] cgroup: Unknown subsys name 'net' [ 46.307505] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:57:13 Registers: info registers vcpu 0 RAX=ffffffff861c7687 RBX=0000000000000001 RCX=ffffffff861c7682 RDX=0000000000000000 RSI=0000000000000007 RDI=ffffffff85e5cae4 RBP=ffff888016837a38 RSP=ffff888016837970 R8 =ffffffff861c7664 R9 =ffff888016837a20 R10=0000000000038001 R11=0000000000038dc4 R12=ffff888016837a40 R13=ffff888016837a28 R14=ffff888016837a21 R15=ffff8880168379e0 RIP=ffffffff81130a6e 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 00007f998bdfc900 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=00007f998c3b3618 CR3=0000000017ebe000 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=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 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=ffff888008c58400 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=00005634397dffe0 CR3=0000000019eb6000 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=2037313a37353a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a37353a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000