syzkaller login: [ 30.951638] BUG: Bad rss-counter state mm:00000000db6a975a type:MM_FILEPAGES val:33 [ 30.952661] BUG: Bad rss-counter state mm:00000000db6a975a type:MM_ANONPAGES val:22 [ 31.115694] ================================================================== [ 31.116614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.117563] Read of size 8 at addr ffff88800967b058 by task sshd/220 [ 31.118455] [ 31.118676] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.119535] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.120522] Call Trace: [ 31.120855] [ 31.121141] dump_stack_lvl+0x91/0xf0 [ 31.121636] print_report+0xcc/0x620 [ 31.122142] ? __virt_addr_valid+0x102/0x340 [ 31.122706] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.123332] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.123965] kasan_report+0xbe/0xf0 [ 31.124446] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.125070] vma_interval_tree_remove+0xc75/0xec0 [ 31.125685] vma_prepare+0xc54/0x11a0 [ 31.126191] __split_vma+0x5af/0x950 [ 31.126668] ? __pfx___split_vma+0x10/0x10 [ 31.127203] ? find_held_lock+0x2c/0x110 [ 31.127727] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.128309] ? lock_is_held_type+0x9f/0x120 [ 31.128845] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.129456] ? mtree_range_walk+0x632/0x900 [ 31.130023] ? mas_walk+0x5c7/0x7c0 [ 31.130504] do_vmi_munmap+0x1f1/0x2b0 [ 31.131008] mmap_region+0x1f9/0x2660 [ 31.131496] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.132002] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.132708] ? __pfx_lock_acquire+0x10/0x10 [ 31.133251] ? __pfx_mmap_region+0x10/0x10 [ 31.133816] ? security_mmap_addr+0x7d/0xa0 [ 31.134346] ? get_unmapped_area+0x1f5/0x3f0 [ 31.134901] do_mmap+0x854/0xf00 [ 31.135342] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.135836] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.136399] ksys_mmap_pgoff+0x3af/0x500 [ 31.136907] do_syscall_64+0x3f/0x90 [ 31.137395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.138065] RIP: 0033:0x7fad3d3dcd82 [ 31.138526] 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 [ 31.140625] RSP: 002b:00007ffcea1d3158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.141547] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad3d3dcd82 [ 31.142416] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad3c816000 [ 31.143280] RBP: 00007fad3c816000 R08: 0000000000000009 R09: 0000000000001000 [ 31.144167] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bae6f47ec0 [ 31.145029] R13: 00007ffcea1d3170 R14: 00007ffcea1d31a0 R15: 00007ffcea1d3500 [ 31.145922] [ 31.146216] [ 31.146430] Allocated by task 213: [ 31.146866] kasan_save_stack+0x22/0x50 [ 31.147382] kasan_set_track+0x25/0x30 [ 31.147893] __kasan_slab_alloc+0x59/0x70 [ 31.148449] kmem_cache_alloc+0x16b/0x370 [ 31.148994] vm_area_dup+0x20/0x160 [ 31.149454] __split_vma+0x170/0x950 [ 31.149953] split_vma+0xc6/0x110 [ 31.150389] mprotect_fixup+0x8d2/0xb30 [ 31.150892] do_mprotect_pkey+0x87e/0xd40 [ 31.151449] __x64_sys_mprotect+0x78/0xc0 [ 31.152012] do_syscall_64+0x3f/0x90 [ 31.152507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.153152] [ 31.153366] Freed by task 213: [ 31.153783] kasan_save_stack+0x22/0x50 [ 31.154285] kasan_set_track+0x25/0x30 [ 31.154774] kasan_save_free_info+0x2b/0x50 [ 31.155302] __kasan_slab_free+0x10a/0x190 [ 31.155833] kmem_cache_free+0x10d/0x4d0 [ 31.156337] rcu_core+0x8c8/0x2860 [ 31.156786] __do_softirq+0x1b7/0x7d4 [ 31.157277] [ 31.157495] Last potentially related work creation: [ 31.158104] kasan_save_stack+0x22/0x50 [ 31.158604] __kasan_record_aux_stack+0x8e/0xa0 [ 31.159182] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.159818] remove_vma+0x139/0x170 [ 31.160303] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.160882] do_vmi_munmap+0x1f1/0x2b0 [ 31.161370] __vm_munmap+0x138/0x3a0 [ 31.161868] __x64_sys_munmap+0x59/0x80 [ 31.162360] do_syscall_64+0x3f/0x90 [ 31.162835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.163478] [ 31.163691] Second to last potentially related work creation: [ 31.164391] kasan_save_stack+0x22/0x50 [ 31.164901] __kasan_record_aux_stack+0x8e/0xa0 [ 31.165478] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.166125] remove_vma+0x139/0x170 [ 31.166583] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.167156] do_vmi_munmap+0x1f1/0x2b0 [ 31.167649] mmap_region+0x1f9/0x2660 [ 31.168132] do_mmap+0x854/0xf00 [ 31.168564] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.169053] ksys_mmap_pgoff+0x3af/0x500 [ 31.169556] do_syscall_64+0x3f/0x90 [ 31.170042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.170688] [ 31.170905] The buggy address belongs to the object at ffff88800967b000 [ 31.170905] which belongs to the cache vm_area_struct of size 168 [ 31.172362] The buggy address is located 88 bytes inside of [ 31.172362] freed 168-byte region [ffff88800967b000, ffff88800967b0a8) [ 31.173782] [ 31.173998] The buggy address belongs to the physical page: [ 31.174648] page:00000000304e16f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800967b488 pfn:0x967b [ 31.175870] memcg:ffff888014656601 [ 31.176300] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.176944] page_type: 0xffffffff() [ 31.177395] raw: 0100000000000200 ffff8880087a0c80 ffffea000051bc00 dead000000000006 [ 31.178319] raw: ffff88800967b488 0000000080110007 00000001ffffffff ffff888014656601 [ 31.179219] page dumped because: kasan: bad access detected [ 31.179936] [ 31.180151] Memory state around the buggy address: [ 31.180747] ffff88800967af00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.181632] ffff88800967af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.182500] >ffff88800967b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.183347] ^ [ 31.184077] ffff88800967b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.184936] ffff88800967b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.185832] ================================================================== [ 31.186857] Disabling lock debugging due to kernel taint [ 33.112713] BUG: Bad rss-counter state mm:00000000fc60b224 type:MM_FILEPAGES val:33 [ 33.113893] BUG: Bad rss-counter state mm:00000000fc60b224 type:MM_ANONPAGES val:22 [ 33.502287] BUG: Bad rss-counter state mm:00000000a920f6de type:MM_FILEPAGES val:33 [ 33.503414] BUG: Bad rss-counter state mm:00000000a920f6de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60418' (ECDSA) to the list of known hosts. 2023/06/21 08:01:03 fuzzer started 2023/06/21 08:01:03 dialing manager at localhost:36067 2023/06/21 08:01:03 checking machine... 2023/06/21 08:01:03 checking revisions... [ 34.228454] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:01:03 testing simple program... [ 34.288739] cgroup: Unknown subsys name 'net' [ 34.334350] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:01:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8614c0e0 RDX=0000000000000008 RSI=ffff88800d6df710 RDI=ffff88800d6df3d0 RBP=ffff88800d6df428 RSP=ffff88800d6df340 R8 =ffffffff8614c0e4 R9 =ffff88800d6df410 R10=0000000000038001 R11=00000000000240a4 R12=ffff88800d6df430 R13=ffff88800d6df418 R14=ffff88800d6df718 R15=ffff88800d6df3d0 RIP=ffffffff81130400 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 00007fd8fa00a900 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=00007fd8f948ed90 CR3=000000000d77e000 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=121a9ef06eb707e400000000000ae988 XMM05=0c2d400aa522c1aa0000000000134a28 XMM06=4fda316b135da52b0000000000133818 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b40 RCX=ffffffff86138e01 RDX=1ffff1100d9e1377 RSI=ffffffff8180c705 RDI=ffff88806cf09b4c RBP=ffff88806cf09bb8 RSP=ffff88806cf09a58 R8 =ffffffff86138e90 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888015d8d1c0 R15=ffff88800d9b6980 RIP=ffffffff813ad547 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 00007f21b8450900 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=00007ffd31e47000 CR3=000000000ea74000 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