syzkaller login: [ 60.362758] BUG: Bad rss-counter state mm:00000000c2400d21 type:MM_FILEPAGES val:33 [ 60.364136] BUG: Bad rss-counter state mm:00000000c2400d21 type:MM_ANONPAGES val:22 [ 60.513416] ================================================================== [ 60.513961] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.514533] Read of size 8 at addr ffff88800e0f8228 by task sshd/219 [ 60.515009] [ 60.515174] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.515821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.516563] Call Trace: [ 60.516805] [ 60.517020] dump_stack_lvl+0x91/0xf0 [ 60.517394] print_report+0xcc/0x620 [ 60.517760] ? __virt_addr_valid+0x102/0x340 [ 60.518183] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.518877] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.519352] kasan_report+0xbe/0xf0 [ 60.519713] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.520182] vma_interval_tree_remove+0xc75/0xec0 [ 60.520636] vma_prepare+0xc54/0x11a0 [ 60.521013] __split_vma+0x5af/0x950 [ 60.521376] ? __pfx___split_vma+0x10/0x10 [ 60.521778] ? find_held_lock+0x2c/0x110 [ 60.522179] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.522630] ? lock_is_held_type+0x9f/0x120 [ 60.523026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.523386] ? mtree_range_walk+0x632/0x900 [ 60.523710] ? mas_walk+0x5c7/0x7c0 [ 60.523992] do_vmi_munmap+0x1f1/0x2b0 [ 60.524279] mmap_region+0x1f9/0x2660 [ 60.524565] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.524863] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.525290] ? __pfx_lock_acquire+0x10/0x10 [ 60.525602] ? __pfx_mmap_region+0x10/0x10 [ 60.525922] ? security_mmap_addr+0x7d/0xa0 [ 60.526237] ? get_unmapped_area+0x1f5/0x3f0 [ 60.526564] do_mmap+0x854/0xf00 [ 60.526841] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.527130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.527471] ksys_mmap_pgoff+0x3af/0x500 [ 60.527773] do_syscall_64+0x3f/0x90 [ 60.528054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.528439] RIP: 0033:0x7f132271ed82 [ 60.528712] 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 [ 60.529987] RSP: 002b:00007ffdf4211248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.530536] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f132271ed82 [ 60.531049] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1321b58000 [ 60.531552] RBP: 00007f1321b58000 R08: 0000000000000009 R09: 0000000000001000 [ 60.532060] R10: 0000000000000812 R11: 0000000000000206 R12: 000056423809ab20 [ 60.532567] R13: 00007ffdf4211260 R14: 00007ffdf4211290 R15: 00007ffdf42115f0 [ 60.533083] [ 60.533255] [ 60.533380] Allocated by task 212: [ 60.533635] kasan_save_stack+0x22/0x50 [ 60.533935] kasan_set_track+0x25/0x30 [ 60.534221] __kasan_slab_alloc+0x59/0x70 [ 60.534536] kmem_cache_alloc+0x16b/0x370 [ 60.534852] vm_area_dup+0x20/0x160 [ 60.535125] __split_vma+0x170/0x950 [ 60.535401] split_vma+0xc6/0x110 [ 60.535658] mprotect_fixup+0x8d2/0xb30 [ 60.535954] do_mprotect_pkey+0x87e/0xd40 [ 60.536274] __x64_sys_mprotect+0x78/0xc0 [ 60.536591] do_syscall_64+0x3f/0x90 [ 60.536881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.537263] [ 60.537389] Freed by task 19: [ 60.537622] kasan_save_stack+0x22/0x50 [ 60.537919] kasan_set_track+0x25/0x30 [ 60.538222] kasan_save_free_info+0x2b/0x50 [ 60.538543] __kasan_slab_free+0x10a/0x190 [ 60.538871] kmem_cache_free+0x10d/0x4d0 [ 60.539179] rcu_core+0x8c8/0x2860 [ 60.539458] __do_softirq+0x1b7/0x7d4 [ 60.539745] [ 60.539872] Last potentially related work creation: [ 60.540225] kasan_save_stack+0x22/0x50 [ 60.540532] __kasan_record_aux_stack+0x8e/0xa0 [ 60.540872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.541272] remove_vma+0x139/0x170 [ 60.541536] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.541894] do_vmi_munmap+0x1f1/0x2b0 [ 60.542193] __vm_munmap+0x138/0x3a0 [ 60.542474] __x64_sys_munmap+0x59/0x80 [ 60.542800] do_syscall_64+0x3f/0x90 [ 60.543101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.543482] [ 60.543617] Second to last potentially related work creation: [ 60.544054] kasan_save_stack+0x22/0x50 [ 60.544373] __kasan_record_aux_stack+0x8e/0xa0 [ 60.544721] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.545080] remove_vma+0x139/0x170 [ 60.545333] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.545640] do_vmi_munmap+0x1f1/0x2b0 [ 60.545909] mmap_region+0x1f9/0x2660 [ 60.546175] do_mmap+0x854/0xf00 [ 60.546416] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.546696] ksys_mmap_pgoff+0x3af/0x500 [ 60.546977] do_syscall_64+0x3f/0x90 [ 60.547243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.547599] [ 60.547724] The buggy address belongs to the object at ffff88800e0f81d0 [ 60.547724] which belongs to the cache vm_area_struct of size 168 [ 60.548544] The buggy address is located 88 bytes inside of [ 60.548544] freed 168-byte region [ffff88800e0f81d0, ffff88800e0f8278) [ 60.549332] [ 60.549453] The buggy address belongs to the physical page: [ 60.549827] page:0000000035d6ac06 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0f8 [ 60.550439] memcg:ffff88800e012401 [ 60.550691] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.551066] page_type: 0xffffffff() [ 60.551344] raw: 0100000000000200 ffff88800879fc80 ffffea000037fc40 dead000000000006 [ 60.551915] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e012401 [ 60.552486] page dumped because: kasan: bad access detected [ 60.552898] [ 60.553027] Memory state around the buggy address: [ 60.553399] ffff88800e0f8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.553909] ffff88800e0f8180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 60.554389] >ffff88800e0f8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 60.554931] ^ [ 60.555278] ffff88800e0f8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 60.555779] ffff88800e0f8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 60.556251] ================================================================== [ 60.556807] Disabling lock debugging due to kernel taint [ 62.404170] BUG: Bad rss-counter state mm:0000000073cf29de type:MM_FILEPAGES val:33 [ 62.406031] BUG: Bad rss-counter state mm:0000000073cf29de type:MM_ANONPAGES val:22 [ 62.891552] BUG: Bad rss-counter state mm:00000000557a19b2 type:MM_FILEPAGES val:33 [ 62.892628] BUG: Bad rss-counter state mm:00000000557a19b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9354' (ECDSA) to the list of known hosts. 2023/06/20 07:14:18 fuzzer started 2023/06/20 07:14:18 dialing manager at localhost:44161 2023/06/20 07:14:18 checking machine... 2023/06/20 07:14:18 checking revisions... [ 63.612992] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:14:19 testing simple program... [ 63.660658] cgroup: Unknown subsys name 'net' [ 63.713639] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:14:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880103a51c0 RSI=ffffffff818a333a RDI=0000000000000001 RBP=000000063db18866 RSP=ffff88800da2f5b8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800da2f78c R13=9b4bc99803755591 R14=ffff88800da2f750 R15=ffff888019c4c435 RIP=ffffffff814c081b 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 00007f39035d8900 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=00007f39029f7120 CR3=000000000e678000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=fc1890d469d6714e00000000000ae988 XMM05=16e77273bf5b12da0000000000135b30 XMM06=5ec5b7aa0f0f07ad0000000000134560 XMM07=fb795ef6d65770560000000000123738 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880090bfc30 RCX=0000000000000001 RDX=1ffff11001217f10 RSI=ffff8880090bfc00 RDI=ffff8880090bf880 RBP=ffff8880090b8000 RSP=ffff8880090bf800 R8 =0000000000000001 R9 =ffff8880090bf8b0 R10=0000000000038001 R11=000000000000fc0f R12=ffff8880090bf8d0 R13=ffff8880090bf8b8 R14=ffff8880090bfc00 R15=ffff8880090bf870 RIP=ffffffff81131cac 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 00007f40ae1e3900 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=00007ffdc6f9c000 CR3=000000000f09c000 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=563412feff00545000000000000080fe 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