syzkaller login: [ 31.704008] BUG: Bad rss-counter state mm:000000001b61ba04 type:MM_FILEPAGES val:33 [ 31.705179] BUG: Bad rss-counter state mm:000000001b61ba04 type:MM_ANONPAGES val:22 [ 31.750149] ================================================================== [ 31.751529] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.752720] Read of size 8 at addr ffff8880158fe5c8 by task sshd/221 [ 31.753626] [ 31.753894] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.754833] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.755921] Call Trace: [ 31.756241] [ 31.756523] dump_stack_lvl+0x91/0xf0 [ 31.757022] print_report+0xcc/0x620 [ 31.757521] ? __virt_addr_valid+0x102/0x340 [ 31.758079] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.758713] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.759328] kasan_report+0xbe/0xf0 [ 31.759827] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.760452] vma_interval_tree_remove+0xc75/0xec0 [ 31.761083] vma_prepare+0xc54/0x11a0 [ 31.761570] __split_vma+0x5af/0x950 [ 31.762059] ? __pfx___split_vma+0x10/0x10 [ 31.762585] ? find_held_lock+0x2c/0x110 [ 31.763129] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.763706] ? lock_is_held_type+0x9f/0x120 [ 31.764242] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.764855] ? mtree_range_walk+0x632/0x900 [ 31.765427] ? mas_walk+0x5c7/0x7c0 [ 31.765928] do_vmi_munmap+0x1f1/0x2b0 [ 31.766419] mmap_region+0x1f9/0x2660 [ 31.766914] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.767428] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.768145] ? __pfx_lock_acquire+0x10/0x10 [ 31.768682] ? __pfx_mmap_region+0x10/0x10 [ 31.769221] ? security_mmap_addr+0x7d/0xa0 [ 31.769774] ? get_unmapped_area+0x1f5/0x3f0 [ 31.770318] do_mmap+0x854/0xf00 [ 31.770778] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.771278] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.771855] ksys_mmap_pgoff+0x3af/0x500 [ 31.772363] do_syscall_64+0x3f/0x90 [ 31.772855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.773518] RIP: 0033:0x7febfbdc4d82 [ 31.773985] 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 [ 31.776158] RSP: 002b:00007ffc84a595b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.777073] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007febfbdc4d82 [ 31.777940] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007febfb1fe000 [ 31.778792] RBP: 00007febfb1fe000 R08: 0000000000000009 R09: 0000000000001000 [ 31.779636] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d5cb9deec0 [ 31.780488] R13: 00007ffc84a595d0 R14: 00007ffc84a59600 R15: 00007ffc84a59960 [ 31.781390] [ 31.781699] [ 31.781923] Allocated by task 214: [ 31.782345] kasan_save_stack+0x22/0x50 [ 31.782863] kasan_set_track+0x25/0x30 [ 31.783356] __kasan_slab_alloc+0x59/0x70 [ 31.783889] kmem_cache_alloc+0x16b/0x370 [ 31.784413] vm_area_dup+0x20/0x160 [ 31.784878] __split_vma+0x170/0x950 [ 31.785350] split_vma+0xc6/0x110 [ 31.785815] mprotect_fixup+0x8d2/0xb30 [ 31.786313] do_mprotect_pkey+0x87e/0xd40 [ 31.786845] __x64_sys_mprotect+0x78/0xc0 [ 31.787359] do_syscall_64+0x3f/0x90 [ 31.787860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.788494] [ 31.788729] Freed by task 214: [ 31.789123] kasan_save_stack+0x22/0x50 [ 31.789646] kasan_set_track+0x25/0x30 [ 31.790157] kasan_save_free_info+0x2b/0x50 [ 31.790701] __kasan_slab_free+0x10a/0x190 [ 31.791250] kmem_cache_free+0x10d/0x4d0 [ 31.791763] rcu_core+0x8c8/0x2860 [ 31.792204] __do_softirq+0x1b7/0x7d4 [ 31.792689] [ 31.792907] Last potentially related work creation: [ 31.793524] kasan_save_stack+0x22/0x50 [ 31.794037] __kasan_record_aux_stack+0x8e/0xa0 [ 31.794614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.795267] remove_vma+0x139/0x170 [ 31.795733] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.796315] do_vmi_munmap+0x1f1/0x2b0 [ 31.796816] __vm_munmap+0x138/0x3a0 [ 31.797291] __x64_sys_munmap+0x59/0x80 [ 31.797798] do_syscall_64+0x3f/0x90 [ 31.798266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.798910] [ 31.799124] The buggy address belongs to the object at ffff8880158fe570 [ 31.799124] which belongs to the cache vm_area_struct of size 168 [ 31.800576] The buggy address is located 88 bytes inside of [ 31.800576] freed 168-byte region [ffff8880158fe570, ffff8880158fe618) [ 31.802018] [ 31.802234] The buggy address belongs to the physical page: [ 31.802902] page:000000006cc75d56 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158fe [ 31.803994] memcg:ffff888010309701 [ 31.804418] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.805132] page_type: 0xffffffff() [ 31.805599] raw: 0100000000000200 ffff8880087a0c80 ffffea0000400880 dead000000000007 [ 31.806534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010309701 [ 31.807452] page dumped because: kasan: bad access detected [ 31.808117] [ 31.808330] Memory state around the buggy address: [ 31.808915] ffff8880158fe480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.809801] ffff8880158fe500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.810654] >ffff8880158fe580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.811531] ^ [ 31.812205] ffff8880158fe600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.813063] ffff8880158fe680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.813955] ================================================================== [ 31.814994] Disabling lock debugging due to kernel taint [ 33.881938] BUG: Bad rss-counter state mm:00000000e4ec8247 type:MM_FILEPAGES val:33 [ 33.883104] BUG: Bad rss-counter state mm:00000000e4ec8247 type:MM_ANONPAGES val:22 [ 34.344956] BUG: Bad rss-counter state mm:000000005f9cbccc type:MM_FILEPAGES val:33 [ 34.346075] BUG: Bad rss-counter state mm:000000005f9cbccc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32165' (ECDSA) to the list of known hosts. 2023/06/20 20:10:51 fuzzer started 2023/06/20 20:10:51 dialing manager at localhost:36067 2023/06/20 20:10:51 checking machine... 2023/06/20 20:10:51 checking revisions... [ 35.067364] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:10:51 testing simple program... [ 35.113083] cgroup: Unknown subsys name 'net' [ 35.171239] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:10:51 Registers: info registers vcpu 0 RAX=ffffffff818ad74a RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110028f7eff RSI=ffffffff818ad74a RDI=ffff8880147bf868 RBP=ffff8880147bf838 RSP=ffff8880147bf798 R8 =0000000000000001 R9 =ffff8880147bf7e0 R10=0000000000038001 R11=000000000002384c R12=ffff8880147bf868 R13=0000000000000000 R14=ffff8880102e9b40 R15=ffff888016f86260 RIP=ffffffff813ad470 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 00007f494bfd8900 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=00007f494b425990 CR3=000000000c6f0000 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=1abac404ccaada5200000000000ae988 XMM05=2a8de81d701f8abd0000000000133168 XMM06=c291bd5c70af25b90000000000131f68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81128d60 RBX=0000000000000000 RCX=ffffffff815344fa RDX=1ffffffff0a58f98 RSI=0000000000000000 RDI=00000000000000b0 RBP=ffffffff852c7cc0 RSP=ffff88806cf09fd8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806cf09ff8 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81128d64 RFL=00000046 [---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 00007fe53d6dd900 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=00007ffe1c547000 CR3=000000000f138000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000