syzkaller login: [ 31.065582] BUG: Bad rss-counter state mm:00000000477eabd5 type:MM_FILEPAGES val:33 [ 31.066746] BUG: Bad rss-counter state mm:00000000477eabd5 type:MM_ANONPAGES val:22 [ 31.100322] ================================================================== [ 31.101354] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.102401] Read of size 8 at addr ffff8880103fed08 by task sshd/221 [ 31.103223] [ 31.103469] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.104433] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.105515] Call Trace: [ 31.105848] [ 31.106168] dump_stack_lvl+0x91/0xf0 [ 31.106720] print_report+0xcc/0x620 [ 31.107272] ? __virt_addr_valid+0x102/0x340 [ 31.107880] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.108588] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.109266] kasan_report+0xbe/0xf0 [ 31.109743] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.110468] vma_interval_tree_remove+0xc75/0xec0 [ 31.111057] vma_prepare+0xc54/0x11a0 [ 31.111522] __split_vma+0x5af/0x950 [ 31.111979] ? __pfx___split_vma+0x10/0x10 [ 31.112502] ? find_held_lock+0x2c/0x110 [ 31.113006] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.113555] ? lock_is_held_type+0x9f/0x120 [ 31.114079] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.114668] ? mtree_range_walk+0x632/0x900 [ 31.115201] ? mas_walk+0x5c7/0x7c0 [ 31.115664] do_vmi_munmap+0x1f1/0x2b0 [ 31.116144] mmap_region+0x1f9/0x2660 [ 31.116628] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.117125] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.117821] ? __pfx_lock_acquire+0x10/0x10 [ 31.118344] ? __pfx_mmap_region+0x10/0x10 [ 31.118857] ? security_mmap_addr+0x7d/0xa0 [ 31.119369] ? get_unmapped_area+0x1f5/0x3f0 [ 31.119903] do_mmap+0x854/0xf00 [ 31.120346] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.120829] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.121377] ksys_mmap_pgoff+0x3af/0x500 [ 31.121870] do_syscall_64+0x3f/0x90 [ 31.122337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.122968] RIP: 0033:0x7fa4756a3d82 [ 31.123411] 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 [ 31.125473] RSP: 002b:00007ffc19494258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.126351] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4756a3d82 [ 31.127179] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa474add000 [ 31.128003] RBP: 00007fa474add000 R08: 0000000000000009 R09: 0000000000001000 [ 31.128833] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591fa074f70 [ 31.129649] R13: 00007ffc19494270 R14: 00007ffc194942a0 R15: 00007ffc19494600 [ 31.130477] [ 31.130759] [ 31.130966] Allocated by task 214: [ 31.131385] kasan_save_stack+0x22/0x50 [ 31.131878] kasan_set_track+0x25/0x30 [ 31.132364] __kasan_slab_alloc+0x59/0x70 [ 31.132876] kmem_cache_alloc+0x16b/0x370 [ 31.133376] vm_area_dup+0x20/0x160 [ 31.133820] __split_vma+0x170/0x950 [ 31.134276] split_vma+0xc6/0x110 [ 31.134702] mprotect_fixup+0x8d2/0xb30 [ 31.135190] do_mprotect_pkey+0x87e/0xd40 [ 31.135699] __x64_sys_mprotect+0x78/0xc0 [ 31.136224] do_syscall_64+0x3f/0x90 [ 31.136694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137332] [ 31.137541] Freed by task 214: [ 31.137924] kasan_save_stack+0x22/0x50 [ 31.138416] kasan_set_track+0x25/0x30 [ 31.138901] kasan_save_free_info+0x2b/0x50 [ 31.139417] __kasan_slab_free+0x10a/0x190 [ 31.140026] kmem_cache_free+0x10d/0x4d0 [ 31.140542] rcu_core+0x8c8/0x2860 [ 31.140979] __do_softirq+0x1b7/0x7d4 [ 31.141446] [ 31.141656] Last potentially related work creation: [ 31.142232] kasan_save_stack+0x22/0x50 [ 31.142722] __kasan_record_aux_stack+0x8e/0xa0 [ 31.143283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.143910] remove_vma+0x139/0x170 [ 31.144373] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.144914] do_vmi_munmap+0x1f1/0x2b0 [ 31.145384] __vm_munmap+0x138/0x3a0 [ 31.145840] __x64_sys_munmap+0x59/0x80 [ 31.146331] do_syscall_64+0x3f/0x90 [ 31.146801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.147431] [ 31.147640] The buggy address belongs to the object at ffff8880103fecb0 [ 31.147640] which belongs to the cache vm_area_struct of size 168 [ 31.149060] The buggy address is located 88 bytes inside of [ 31.149060] freed 168-byte region [ffff8880103fecb0, ffff8880103fed58) [ 31.150421] [ 31.150629] The buggy address belongs to the physical page: [ 31.151264] page:000000008216bbd5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103fe [ 31.152321] memcg:ffff888015ba9801 [ 31.152735] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.153366] page_type: 0xffffffff() [ 31.153799] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.154686] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ba9801 [ 31.155560] page dumped because: kasan: bad access detected [ 31.156214] [ 31.156424] Memory state around the buggy address: [ 31.156985] ffff8880103fec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.157814] ffff8880103fec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.158638] >ffff8880103fed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.159460] ^ [ 31.159882] ffff8880103fed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.160720] ffff8880103fee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.161542] ================================================================== [ 31.162695] Disabling lock debugging due to kernel taint [ 32.996599] BUG: Bad rss-counter state mm:000000004f277f29 type:MM_FILEPAGES val:33 [ 32.997646] BUG: Bad rss-counter state mm:000000004f277f29 type:MM_ANONPAGES val:22 [ 33.501186] BUG: Bad rss-counter state mm:00000000709c55a4 type:MM_FILEPAGES val:33 [ 33.502230] BUG: Bad rss-counter state mm:00000000709c55a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14774' (ECDSA) to the list of known hosts. 2023/06/20 13:23:26 fuzzer started 2023/06/20 13:23:26 dialing manager at localhost:36067 2023/06/20 13:23:26 checking machine... 2023/06/20 13:23:26 checking revisions... [ 34.205678] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:23:26 testing simple program... [ 34.261398] cgroup: Unknown subsys name 'net' [ 34.300938] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:23:26 Registers: info registers vcpu 0 RAX=1ffffffff0c270df RBX=0000000000000001 RCX=ffffffff861386fa RDX=0000000000000001 RSI=dffffc0000000000 RDI=ffffffff861386fc RBP=ffff8880068577f8 RSP=ffff888006857730 R8 =ffffffff861386fe R9 =ffff8880068577e0 R10=0000000000038001 R11=0000000000020c51 R12=ffff888006857800 R13=ffff8880068577e8 R14=ffff888006857a80 R15=ffff8880068577a0 RIP=ffffffff811311c3 RFL=00000213 [----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 00007f93f0397900 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=00007f93ef7cf170 CR3=000000000d898000 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=acbb463371b3ecb400000000000ae988 XMM05=b859d6f9419660700000000000132b28 XMM06=e4cb8bb95a7664b600000000001319c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000020 RCX=0000000000000000 RDX=ffff8880161551c0 RSI=ffffffff83723ca5 RDI=0000000000000005 RBP=0000000000000021 RSP=ffff88800fb677b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99be0 R14=0000000000000000 R15=0000000000000006 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 00007f3944e0f900 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=00007ffd6c800000 CR3=000000000f216000 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