syzkaller login: [ 31.436373] BUG: Bad rss-counter state mm:000000000333f028 type:MM_FILEPAGES val:33 [ 31.437576] BUG: Bad rss-counter state mm:000000000333f028 type:MM_ANONPAGES val:22 [ 31.475066] ================================================================== [ 31.476028] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.476984] Read of size 8 at addr ffff888019b35c20 by task sshd/219 [ 31.477826] [ 31.478051] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.478922] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.479926] Call Trace: [ 31.480248] [ 31.480535] dump_stack_lvl+0x91/0xf0 [ 31.481029] print_report+0xcc/0x620 [ 31.481521] ? __virt_addr_valid+0x102/0x340 [ 31.482092] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.482724] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.483348] kasan_report+0xbe/0xf0 [ 31.483829] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.484461] vma_interval_tree_remove+0xc75/0xec0 [ 31.485071] vma_prepare+0xc54/0x11a0 [ 31.485582] __split_vma+0x5af/0x950 [ 31.486092] ? __pfx___split_vma+0x10/0x10 [ 31.486654] ? find_held_lock+0x2c/0x110 [ 31.487205] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.487804] ? lock_is_held_type+0x9f/0x120 [ 31.488371] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.489017] ? mtree_range_walk+0x632/0x900 [ 31.489612] ? mas_walk+0x5c7/0x7c0 [ 31.490143] do_vmi_munmap+0x1f1/0x2b0 [ 31.490665] mmap_region+0x1f9/0x2660 [ 31.491178] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.491725] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.492479] ? __pfx_lock_acquire+0x10/0x10 [ 31.493041] ? __pfx_mmap_region+0x10/0x10 [ 31.493609] ? security_mmap_addr+0x7d/0xa0 [ 31.494189] ? get_unmapped_area+0x1f5/0x3f0 [ 31.494770] do_mmap+0x854/0xf00 [ 31.495237] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.495758] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.496348] ksys_mmap_pgoff+0x3af/0x500 [ 31.496880] do_syscall_64+0x3f/0x90 [ 31.497388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.498092] RIP: 0033:0x7f84af80bd82 [ 31.498586] 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 [ 31.500855] RSP: 002b:00007ffdd66ce998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.501839] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84af80bd82 [ 31.502744] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84aec45000 [ 31.503646] RBP: 00007f84aec45000 R08: 0000000000000009 R09: 0000000000001000 [ 31.504537] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557cbd817f60 [ 31.505446] R13: 00007ffdd66ce9b0 R14: 00007ffdd66ce9e0 R15: 00007ffdd66ced40 [ 31.506361] [ 31.506670] [ 31.506895] Allocated by task 212: [ 31.507352] kasan_save_stack+0x22/0x50 [ 31.507884] kasan_set_track+0x25/0x30 [ 31.508409] __kasan_slab_alloc+0x59/0x70 [ 31.508964] kmem_cache_alloc+0x16b/0x370 [ 31.509521] vm_area_dup+0x20/0x160 [ 31.510017] __split_vma+0x170/0x950 [ 31.510515] split_vma+0xc6/0x110 [ 31.510979] mprotect_fixup+0x8d2/0xb30 [ 31.511514] do_mprotect_pkey+0x87e/0xd40 [ 31.512068] __x64_sys_mprotect+0x78/0xc0 [ 31.512625] do_syscall_64+0x3f/0x90 [ 31.513127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.513817] [ 31.514047] Freed by task 19: [ 31.514460] kasan_save_stack+0x22/0x50 [ 31.514994] kasan_set_track+0x25/0x30 [ 31.515524] kasan_save_free_info+0x2b/0x50 [ 31.516096] __kasan_slab_free+0x10a/0x190 [ 31.516660] kmem_cache_free+0x10d/0x4d0 [ 31.517204] rcu_core+0x8c8/0x2860 [ 31.517666] __do_softirq+0x1b7/0x7d4 [ 31.518172] [ 31.518402] Last potentially related work creation: [ 31.519032] kasan_save_stack+0x22/0x50 [ 31.519565] __kasan_record_aux_stack+0x8e/0xa0 [ 31.520171] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.520853] remove_vma+0x139/0x170 [ 31.521330] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.521938] do_vmi_munmap+0x1f1/0x2b0 [ 31.522452] __vm_munmap+0x138/0x3a0 [ 31.522953] __x64_sys_munmap+0x59/0x80 [ 31.523474] do_syscall_64+0x3f/0x90 [ 31.523981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.524660] [ 31.524885] The buggy address belongs to the object at ffff888019b35bc8 [ 31.524885] which belongs to the cache vm_area_struct of size 168 [ 31.526459] The buggy address is located 88 bytes inside of [ 31.526459] freed 168-byte region [ffff888019b35bc8, ffff888019b35c70) [ 31.527961] [ 31.528186] The buggy address belongs to the physical page: [ 31.528891] page:0000000044ccd9bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b35 [ 31.530076] memcg:ffff88801676a401 [ 31.530532] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.531214] page_type: 0xffffffff() [ 31.531696] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.532668] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801676a401 [ 31.533645] page dumped because: kasan: bad access detected [ 31.534351] [ 31.534576] Memory state around the buggy address: [ 31.535192] ffff888019b35b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.536108] ffff888019b35b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.537024] >ffff888019b35c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.537951] ^ [ 31.538513] ffff888019b35c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.539425] ffff888019b35d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.540336] ================================================================== [ 31.541588] Disabling lock debugging due to kernel taint [ 33.406370] BUG: Bad rss-counter state mm:0000000073e59175 type:MM_FILEPAGES val:33 [ 33.407083] BUG: Bad rss-counter state mm:0000000073e59175 type:MM_ANONPAGES val:22 [ 33.882627] BUG: Bad rss-counter state mm:000000000808f7af type:MM_FILEPAGES val:33 [ 33.883649] BUG: Bad rss-counter state mm:000000000808f7af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46603' (ECDSA) to the list of known hosts. 2023/06/21 05:27:34 fuzzer started 2023/06/21 05:27:34 dialing manager at localhost:36067 2023/06/21 05:27:34 checking machine... 2023/06/21 05:27:34 checking revisions... [ 34.619387] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:27:34 testing simple program... [ 34.665807] cgroup: Unknown subsys name 'net' [ 34.718610] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:27:34 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110028d5f1b RSP=ffff8880146af8b8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff8880167f9e68 R13=ffffffff83c1e150 R14=ffff8880146afa70 R15=0000000000000053 RIP=ffffffff8135b980 RFL=00000282 [--S----] 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 00007fc6384e7900 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=00007fc637a05000 CR3=000000000f2f6000 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=762d16a697bb893500000000000ae988 XMM05=aba763cd3e14b56c0000000000132e08 XMM06=806171799158d9670000000000131bf8 XMM07=fb795ef6d65770560000000000121f48 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860d8256 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801684f920 RSP=ffff88801684f858 R8 =ffffffff860d825a R9 =ffff88801684f908 R10=0000000000038001 R11=0000000000010b8d R12=ffff88801684f928 R13=ffff88801684f910 R14=ffff88801684fa00 R15=ffff88801684f8c8 RIP=ffffffff81131153 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 00007f1d0fd90900 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=00007ffdaf885000 CR3=0000000015ab4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000