syzkaller login: [ 31.669955] BUG: Bad rss-counter state mm:00000000bc432407 type:MM_FILEPAGES val:33 [ 31.671124] BUG: Bad rss-counter state mm:00000000bc432407 type:MM_ANONPAGES val:22 [ 31.713769] ================================================================== [ 31.714815] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.715893] Read of size 8 at addr ffff88801a99a3f8 by task sshd/220 [ 31.716658] [ 31.716875] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.717759] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.718729] Call Trace: [ 31.719042] [ 31.719322] dump_stack_lvl+0x91/0xf0 [ 31.719811] print_report+0xcc/0x620 [ 31.720301] ? __virt_addr_valid+0x102/0x340 [ 31.720848] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.721475] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.722084] kasan_report+0xbe/0xf0 [ 31.722559] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.723171] vma_interval_tree_remove+0xc75/0xec0 [ 31.723769] vma_prepare+0xc54/0x11a0 [ 31.724249] __split_vma+0x5af/0x950 [ 31.724722] ? __pfx___split_vma+0x10/0x10 [ 31.725257] ? find_held_lock+0x2c/0x110 [ 31.725782] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.726346] ? lock_is_held_type+0x9f/0x120 [ 31.726877] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.727480] ? mtree_range_walk+0x632/0x900 [ 31.728034] ? mas_walk+0x5c7/0x7c0 [ 31.728511] do_vmi_munmap+0x1f1/0x2b0 [ 31.729006] mmap_region+0x1f9/0x2660 [ 31.729506] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.730019] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.730732] ? __pfx_lock_acquire+0x10/0x10 [ 31.731264] ? __pfx_mmap_region+0x10/0x10 [ 31.731791] ? security_mmap_addr+0x7d/0xa0 [ 31.732323] ? get_unmapped_area+0x1f5/0x3f0 [ 31.732870] do_mmap+0x854/0xf00 [ 31.733320] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.733812] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.734377] ksys_mmap_pgoff+0x3af/0x500 [ 31.734883] do_syscall_64+0x3f/0x90 [ 31.735363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.736008] RIP: 0033:0x7f58a78cad82 [ 31.736476] 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 [ 31.738604] RSP: 002b:00007fff04be66c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.739505] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f58a78cad82 [ 31.740350] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f58a6d04000 [ 31.741186] RBP: 00007f58a6d04000 R08: 0000000000000009 R09: 0000000000001000 [ 31.742058] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2242d0f70 [ 31.742902] R13: 00007fff04be66e0 R14: 00007fff04be6710 R15: 00007fff04be6a70 [ 31.743749] [ 31.744042] [ 31.744260] Allocated by task 213: [ 31.744689] kasan_save_stack+0x22/0x50 [ 31.745193] kasan_set_track+0x25/0x30 [ 31.745695] __kasan_slab_alloc+0x59/0x70 [ 31.746217] kmem_cache_alloc+0x16b/0x370 [ 31.746735] vm_area_dup+0x20/0x160 [ 31.747184] __split_vma+0x170/0x950 [ 31.747645] split_vma+0xc6/0x110 [ 31.748089] mprotect_fixup+0x8d2/0xb30 [ 31.748583] do_mprotect_pkey+0x87e/0xd40 [ 31.749110] __x64_sys_mprotect+0x78/0xc0 [ 31.749637] do_syscall_64+0x3f/0x90 [ 31.750108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.750743] [ 31.750958] Freed by task 213: [ 31.751351] kasan_save_stack+0x22/0x50 [ 31.751849] kasan_set_track+0x25/0x30 [ 31.752344] kasan_save_free_info+0x2b/0x50 [ 31.752873] __kasan_slab_free+0x10a/0x190 [ 31.753424] kmem_cache_free+0x10d/0x4d0 [ 31.753923] rcu_core+0x8c8/0x2860 [ 31.754414] __do_softirq+0x1b7/0x7d4 [ 31.754893] [ 31.755110] Last potentially related work creation: [ 31.755705] kasan_save_stack+0x22/0x50 [ 31.756219] __kasan_record_aux_stack+0x8e/0xa0 [ 31.756791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.757441] remove_vma+0x139/0x170 [ 31.757894] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.758441] do_vmi_munmap+0x1f1/0x2b0 [ 31.758917] __vm_munmap+0x138/0x3a0 [ 31.759384] __x64_sys_munmap+0x59/0x80 [ 31.759876] do_syscall_64+0x3f/0x90 [ 31.760350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.760992] [ 31.761226] The buggy address belongs to the object at ffff88801a99a3a0 [ 31.761226] which belongs to the cache vm_area_struct of size 168 [ 31.762685] The buggy address is located 88 bytes inside of [ 31.762685] freed 168-byte region [ffff88801a99a3a0, ffff88801a99a448) [ 31.764086] [ 31.764300] The buggy address belongs to the physical page: [ 31.764963] page:000000001ce87b6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a99a [ 31.766054] memcg:ffff88800ec68301 [ 31.766477] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.767114] page_type: 0xffffffff() [ 31.767566] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.768499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec68301 [ 31.769422] page dumped because: kasan: bad access detected [ 31.770078] [ 31.770293] Memory state around the buggy address: [ 31.770869] ffff88801a99a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.771721] ffff88801a99a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.772579] >ffff88801a99a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.773435] ^ [ 31.774274] ffff88801a99a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.775134] ffff88801a99a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.775983] ================================================================== [ 31.776925] Disabling lock debugging due to kernel taint [ 34.320948] BUG: Bad rss-counter state mm:0000000002722370 type:MM_FILEPAGES val:33 [ 34.322229] BUG: Bad rss-counter state mm:0000000002722370 type:MM_ANONPAGES val:22 [ 34.782927] BUG: Bad rss-counter state mm:00000000e16fe644 type:MM_FILEPAGES val:33 [ 34.783944] BUG: Bad rss-counter state mm:00000000e16fe644 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48106' (ECDSA) to the list of known hosts. 2023/06/20 21:03:45 fuzzer started 2023/06/20 21:03:45 dialing manager at localhost:36067 2023/06/20 21:03:45 checking machine... 2023/06/20 21:03:45 checking revisions... [ 35.495840] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:03:45 testing simple program... [ 35.542329] cgroup: Unknown subsys name 'net' [ 35.582618] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:03:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880147477c0 RCX=0000000000000001 RDX=1ffff110028e8ef9 RSI=ffffffff83867afd RDI=ffff8880147477c8 RBP=0000000000000007 RSP=ffff8880147476d8 R8 =0000000000000001 R9 =ffff888014747738 R10=0000000000038001 R11=000000000008b92e R12=ffff8880147477c0 R13=0000000000000000 R14=ffff8880168ab680 R15=0000000000000024 RIP=ffffffff813ad4be RFL=00000216 [----AP-] 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 00007ff96ad97900 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=00007ffed1e6e000 CR3=0000000014724000 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=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 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=ffff888008c04400 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=00007efe0b095060 CR3=000000000fdf2000 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=2035343a33303a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a33303a3132203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000