syzkaller login: [ 41.073791] BUG: Bad rss-counter state mm:000000007ff1533d type:MM_FILEPAGES val:33 [ 41.074984] BUG: Bad rss-counter state mm:000000007ff1533d type:MM_ANONPAGES val:22 [ 41.114134] ================================================================== [ 41.115155] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.116347] Read of size 8 at addr ffff888014230140 by task sshd/220 [ 41.117193] [ 41.117432] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.118402] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.119470] Call Trace: [ 41.119820] [ 41.120133] dump_stack_lvl+0x91/0xf0 [ 41.120671] print_report+0xcc/0x620 [ 41.121202] ? __virt_addr_valid+0x102/0x340 [ 41.121822] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.122506] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.123186] kasan_report+0xbe/0xf0 [ 41.123712] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.124400] vma_interval_tree_remove+0xc75/0xec0 [ 41.125062] vma_prepare+0xc54/0x11a0 [ 41.125599] __split_vma+0x5af/0x950 [ 41.126137] ? __pfx___split_vma+0x10/0x10 [ 41.126724] ? find_held_lock+0x2c/0x110 [ 41.127300] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.127924] ? lock_is_held_type+0x9f/0x120 [ 41.128517] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.129185] ? mtree_range_walk+0x632/0x900 [ 41.129798] ? mas_walk+0x5c7/0x7c0 [ 41.130321] do_vmi_munmap+0x1f1/0x2b0 [ 41.130863] mmap_region+0x1f9/0x2660 [ 41.131395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.131959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.132747] ? __pfx_lock_acquire+0x10/0x10 [ 41.133338] ? __pfx_mmap_region+0x10/0x10 [ 41.133937] ? security_mmap_addr+0x7d/0xa0 [ 41.134525] ? get_unmapped_area+0x1f5/0x3f0 [ 41.135130] do_mmap+0x854/0xf00 [ 41.135618] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.136169] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.136790] ksys_mmap_pgoff+0x3af/0x500 [ 41.137354] do_syscall_64+0x3f/0x90 [ 41.137891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.138602] RIP: 0033:0x7f96f6c08d82 [ 41.139108] 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 [ 41.141453] RSP: 002b:00007ffe1dca3ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.142460] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96f6c08d82 [ 41.143395] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96f6042000 [ 41.144330] RBP: 00007f96f6042000 R08: 0000000000000009 R09: 0000000000001000 [ 41.145266] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c19fb0ec0 [ 41.146208] R13: 00007ffe1dca3f10 R14: 00007ffe1dca3f40 R15: 00007ffe1dca42a0 [ 41.147152] [ 41.147473] [ 41.147710] Allocated by task 212: [ 41.148183] kasan_save_stack+0x22/0x50 [ 41.148744] kasan_set_track+0x25/0x30 [ 41.149288] __kasan_slab_alloc+0x59/0x70 [ 41.149873] kmem_cache_alloc+0x16b/0x370 [ 41.150446] vm_area_dup+0x20/0x160 [ 41.150946] __split_vma+0x170/0x950 [ 41.151461] split_vma+0xc6/0x110 [ 41.151946] mprotect_fixup+0x8d2/0xb30 [ 41.152503] do_mprotect_pkey+0x87e/0xd40 [ 41.153083] __x64_sys_mprotect+0x78/0xc0 [ 41.153662] do_syscall_64+0x3f/0x90 [ 41.154205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.154912] [ 41.155150] Freed by task 212: [ 41.155581] kasan_save_stack+0x22/0x50 [ 41.156140] kasan_set_track+0x25/0x30 [ 41.156689] kasan_save_free_info+0x2b/0x50 [ 41.157281] __kasan_slab_free+0x10a/0x190 [ 41.157883] kmem_cache_free+0x10d/0x4d0 [ 41.158450] rcu_core+0x8c8/0x2860 [ 41.158939] __do_softirq+0x1b7/0x7d4 [ 41.159465] [ 41.159703] Last potentially related work creation: [ 41.160347] kasan_save_stack+0x22/0x50 [ 41.160902] __kasan_record_aux_stack+0x8e/0xa0 [ 41.161539] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.162259] remove_vma+0x139/0x170 [ 41.162756] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.163373] do_vmi_munmap+0x1f1/0x2b0 [ 41.163910] __vm_munmap+0x138/0x3a0 [ 41.164432] __x64_sys_munmap+0x59/0x80 [ 41.164982] do_syscall_64+0x3f/0x90 [ 41.165506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.166233] [ 41.166472] The buggy address belongs to the object at ffff8880142300e8 [ 41.166472] which belongs to the cache vm_area_struct of size 168 [ 41.168097] The buggy address is located 88 bytes inside of [ 41.168097] freed 168-byte region [ffff8880142300e8, ffff888014230190) [ 41.169655] [ 41.169914] The buggy address belongs to the physical page: [ 41.170643] page:000000003630f57c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14230 [ 41.171852] memcg:ffff88800e02ad01 [ 41.172320] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.173037] page_type: 0xffffffff() [ 41.173536] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.174579] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e02ad01 [ 41.175581] page dumped because: kasan: bad access detected [ 41.176311] [ 41.176547] Memory state around the buggy address: [ 41.177186] ffff888014230000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.178137] ffff888014230080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 41.179085] >ffff888014230100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.180027] ^ [ 41.180734] ffff888014230180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.181683] ffff888014230200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.182651] ================================================================== [ 41.183905] Disabling lock debugging due to kernel taint [ 43.457278] BUG: Bad rss-counter state mm:000000006922328d type:MM_FILEPAGES val:33 [ 43.458209] BUG: Bad rss-counter state mm:000000006922328d type:MM_ANONPAGES val:22 [ 43.943408] BUG: Bad rss-counter state mm:000000009fee917b type:MM_FILEPAGES val:33 [ 43.945468] BUG: Bad rss-counter state mm:000000009fee917b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1426' (ECDSA) to the list of known hosts. 2023/06/19 23:17:52 fuzzer started 2023/06/19 23:17:52 dialing manager at localhost:44161 2023/06/19 23:17:52 checking machine... 2023/06/19 23:17:52 checking revisions... [ 44.703028] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:17:52 testing simple program... [ 44.744603] cgroup: Unknown subsys name 'net' [ 44.817519] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:17:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000006490e34b RCX=0000000000000000 RDX=ffff8880142c0000 RSI=ffffffff81ec5b75 RDI=0000000000000001 RBP=000000006490e21f RSP=ffff888016687ea8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=000000006490e348 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81ec5b7c 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 00007f47c8ed1900 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=00007f47c8e8501c CR3=0000000010072000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000020 RCX=ffffffff82270054 RDX=ffff88800e8d3680 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000fc0 RSP=ffff8880158afd18 R8 =0000000000000007 R9 =0000000000000007 R10=0000000000000fc0 R11=0000000000000000 R12=0000557dbab8f330 R13=ffff88800ca18020 R14=6564343438363730 R15=ffff88800ca18038 RIP=ffffffff814c07eb RFL=00040212 [----A--] 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 00007f271dfb6900 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=00007f271d40a210 CR3=0000000013668000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=55fde5f3b5e28f3200000000000ae988 XMM05=66e4ba03dd26676c0000000000135040 XMM06=4fda316b135da52b0000000000133e30 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000