syzkaller login: [ 38.734992] BUG: Bad rss-counter state mm:00000000ea6fb697 type:MM_FILEPAGES val:33 [ 38.737099] BUG: Bad rss-counter state mm:00000000ea6fb697 type:MM_ANONPAGES val:22 [ 38.913596] ================================================================== [ 38.914612] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.915757] Read of size 8 at addr ffff888016983d08 by task sshd/221 [ 38.917260] [ 38.917553] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.918718] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.920059] Call Trace: [ 38.920410] [ 38.920717] dump_stack_lvl+0x91/0xf0 [ 38.921267] print_report+0xcc/0x620 [ 38.921792] ? __virt_addr_valid+0x102/0x340 [ 38.922411] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.923090] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.923774] kasan_report+0xbe/0xf0 [ 38.924314] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.925024] vma_interval_tree_remove+0xc75/0xec0 [ 38.925695] vma_prepare+0xc54/0x11a0 [ 38.926233] __split_vma+0x5af/0x950 [ 38.926756] ? __pfx___split_vma+0x10/0x10 [ 38.927352] ? find_held_lock+0x2c/0x110 [ 38.927960] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.928586] ? lock_is_held_type+0x9f/0x120 [ 38.929196] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.929864] ? mtree_range_walk+0x632/0x900 [ 38.930497] ? mas_walk+0x5c7/0x7c0 [ 38.931035] do_vmi_munmap+0x1f1/0x2b0 [ 38.931587] mmap_region+0x1f9/0x2660 [ 38.932145] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.932730] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.933528] ? __pfx_lock_acquire+0x10/0x10 [ 38.934127] ? __pfx_mmap_region+0x10/0x10 [ 38.934704] ? security_mmap_addr+0x7d/0xa0 [ 38.935298] ? get_unmapped_area+0x1f5/0x3f0 [ 38.935930] do_mmap+0x854/0xf00 [ 38.936409] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.936960] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.937564] ksys_mmap_pgoff+0x3af/0x500 [ 38.938128] do_syscall_64+0x3f/0x90 [ 38.938644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.939353] RIP: 0033:0x7fca4341ed82 [ 38.939857] 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 [ 38.942187] RSP: 002b:00007ffd45b44c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.943183] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca4341ed82 [ 38.944133] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca42858000 [ 38.945068] RBP: 00007fca42858000 R08: 0000000000000009 R09: 0000000000001000 [ 38.945988] R10: 0000000000000812 R11: 0000000000000206 R12: 000055924e501f70 [ 38.946911] R13: 00007ffd45b44c20 R14: 00007ffd45b44c50 R15: 00007ffd45b44fb0 [ 38.947865] [ 38.948201] [ 38.948445] Allocated by task 214: [ 38.948921] kasan_save_stack+0x22/0x50 [ 38.949466] kasan_set_track+0x25/0x30 [ 38.950023] __kasan_slab_alloc+0x59/0x70 [ 38.950591] kmem_cache_alloc+0x16b/0x370 [ 38.951170] vm_area_dup+0x20/0x160 [ 38.951666] __split_vma+0x170/0x950 [ 38.952193] split_vma+0xc6/0x110 [ 38.952670] mprotect_fixup+0x8d2/0xb30 [ 38.953227] do_mprotect_pkey+0x87e/0xd40 [ 38.953795] __x64_sys_mprotect+0x78/0xc0 [ 38.954378] do_syscall_64+0x3f/0x90 [ 38.954903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.955601] [ 38.955846] Freed by task 214: [ 38.956278] kasan_save_stack+0x22/0x50 [ 38.956813] kasan_set_track+0x25/0x30 [ 38.957601] kasan_save_free_info+0x2b/0x50 [ 38.958298] __kasan_slab_free+0x10a/0x190 [ 38.958993] kmem_cache_free+0x10d/0x4d0 [ 38.959652] rcu_core+0x8c8/0x2860 [ 38.960268] __do_softirq+0x1b7/0x7d4 [ 38.960894] [ 38.961177] Last potentially related work creation: [ 38.961944] kasan_save_stack+0x22/0x50 [ 38.962600] __kasan_record_aux_stack+0x8e/0xa0 [ 38.963350] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.964207] remove_vma+0x139/0x170 [ 38.964798] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.965529] do_vmi_munmap+0x1f1/0x2b0 [ 38.966166] __vm_munmap+0x138/0x3a0 [ 38.966780] __x64_sys_munmap+0x59/0x80 [ 38.967431] do_syscall_64+0x3f/0x90 [ 38.968054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.968900] [ 38.969182] The buggy address belongs to the object at ffff888016983cb0 [ 38.969182] which belongs to the cache vm_area_struct of size 168 [ 38.971097] The buggy address is located 88 bytes inside of [ 38.971097] freed 168-byte region [ffff888016983cb0, ffff888016983d58) [ 38.972836] [ 38.973080] The buggy address belongs to the physical page: [ 38.973812] page:000000000d506b11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16983 [ 38.975017] memcg:ffff88800dcdaf01 [ 38.975485] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.976258] page_type: 0xffffffff() [ 38.976750] raw: 0100000000000200 ffff8880087a0c80 ffffea00003817c0 dead000000000005 [ 38.977769] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcdaf01 [ 38.978758] page dumped because: kasan: bad access detected [ 38.979484] [ 38.979727] Memory state around the buggy address: [ 38.980372] ffff888016983c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.981495] ffff888016983c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.982732] >ffff888016983d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.983989] ^ [ 38.984628] ffff888016983d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.985848] ffff888016983e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.987079] ================================================================== [ 38.988456] Disabling lock debugging due to kernel taint [ 41.857165] BUG: Bad rss-counter state mm:00000000e41c0a4b type:MM_FILEPAGES val:33 [ 41.858425] BUG: Bad rss-counter state mm:00000000e41c0a4b type:MM_ANONPAGES val:22 [ 42.253826] BUG: Bad rss-counter state mm:000000000b87e04d type:MM_FILEPAGES val:33 [ 42.254948] BUG: Bad rss-counter state mm:000000000b87e04d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38894' (ECDSA) to the list of known hosts. 2023/06/20 21:56:33 fuzzer started 2023/06/20 21:56:34 dialing manager at localhost:36067 2023/06/20 21:56:34 checking machine... 2023/06/20 21:56:34 checking revisions... [ 42.977161] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:56:34 testing simple program... [ 43.026690] cgroup: Unknown subsys name 'net' [ 43.066604] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:56:33 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888019937da0 RSI=ffff888019937d80 RDI=ffff888019937a40 RBP=ffff888019937ac8 RSP=ffff888019937a30 R8 =0000000000000001 R9 =ffff888019937a70 R10=0000000000038001 R11=0000000000024383 R12=ffff888019937af8 R13=0000000000000000 R14=ffff888019b58000 R15=ffff888009a1b000 RIP=ffffffff810bd057 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 00007f60d56ce900 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=00007fff74fd3000 CR3=000000000d63c000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007fb357242000 CR3=000000000c776000 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=2177eb7c62181490c04952c5d29d8396 XMM02=2c67c8bc2e329bc3000000000011ab00 XMM03=fb795ef6d657705600000000001214c0 XMM04=3aad61bf6fb8c73e00000000000ae988 XMM05=5a9d233068761c4a0000000000131aa8 XMM06=329b3fd04301c5750000000000130230 XMM07=e042d86d42eb936e0000000000121740 XMM08=9196d5a558b2e7c6000000000011ab60 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000