syzkaller login: [ 32.223367] BUG: Bad rss-counter state mm:000000004c4f8c28 type:MM_FILEPAGES val:33 [ 32.224796] BUG: Bad rss-counter state mm:000000004c4f8c28 type:MM_ANONPAGES val:22 [ 32.392329] ================================================================== [ 32.393240] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.394159] Read of size 8 at addr ffff88800dfecd08 by task sshd/220 [ 32.395018] [ 32.395249] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.396101] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.397087] Call Trace: [ 32.397401] [ 32.397684] dump_stack_lvl+0x91/0xf0 [ 32.398173] print_report+0xcc/0x620 [ 32.398653] ? __virt_addr_valid+0x102/0x340 [ 32.399211] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.399817] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.400423] kasan_report+0xbe/0xf0 [ 32.400894] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.401509] vma_interval_tree_remove+0xc75/0xec0 [ 32.402104] vma_prepare+0xc54/0x11a0 [ 32.402577] __split_vma+0x5af/0x950 [ 32.403052] ? __pfx___split_vma+0x10/0x10 [ 32.403609] ? find_held_lock+0x2c/0x110 [ 32.404126] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.404683] ? lock_is_held_type+0x9f/0x120 [ 32.405211] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.405804] ? mtree_range_walk+0x632/0x900 [ 32.406341] ? mas_walk+0x5c7/0x7c0 [ 32.406809] do_vmi_munmap+0x1f1/0x2b0 [ 32.407298] mmap_region+0x1f9/0x2660 [ 32.407770] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.408264] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.408957] ? __pfx_lock_acquire+0x10/0x10 [ 32.409470] ? __pfx_mmap_region+0x10/0x10 [ 32.409999] ? security_mmap_addr+0x7d/0xa0 [ 32.410527] ? get_unmapped_area+0x1f5/0x3f0 [ 32.411069] do_mmap+0x854/0xf00 [ 32.411508] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.412005] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.412554] ksys_mmap_pgoff+0x3af/0x500 [ 32.413053] do_syscall_64+0x3f/0x90 [ 32.413529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.414157] RIP: 0033:0x7fa92dda4d82 [ 32.414608] 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 [ 32.416726] RSP: 002b:00007fff79512c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.417609] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa92dda4d82 [ 32.418431] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa92d1de000 [ 32.419251] RBP: 00007fa92d1de000 R08: 0000000000000009 R09: 0000000000001000 [ 32.420075] R10: 0000000000000812 R11: 0000000000000206 R12: 00005578b7c6eec0 [ 32.420923] R13: 00007fff79512c60 R14: 00007fff79512c90 R15: 00007fff79512ff0 [ 32.421783] [ 32.422077] [ 32.422291] Allocated by task 213: [ 32.422721] kasan_save_stack+0x22/0x50 [ 32.423240] kasan_set_track+0x25/0x30 [ 32.423722] __kasan_slab_alloc+0x59/0x70 [ 32.424227] kmem_cache_alloc+0x16b/0x370 [ 32.424725] vm_area_dup+0x20/0x160 [ 32.425166] __split_vma+0x170/0x950 [ 32.425618] split_vma+0xc6/0x110 [ 32.426060] mprotect_fixup+0x8d2/0xb30 [ 32.426549] do_mprotect_pkey+0x87e/0xd40 [ 32.427058] __x64_sys_mprotect+0x78/0xc0 [ 32.427568] do_syscall_64+0x3f/0x90 [ 32.428031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.428660] [ 32.428872] Freed by task 203: [ 32.429252] kasan_save_stack+0x22/0x50 [ 32.429737] kasan_set_track+0x25/0x30 [ 32.430211] kasan_save_free_info+0x2b/0x50 [ 32.430722] __kasan_slab_free+0x10a/0x190 [ 32.431276] kmem_cache_free+0x10d/0x4d0 [ 32.431773] rcu_core+0x8c8/0x2860 [ 32.432205] __do_softirq+0x1b7/0x7d4 [ 32.432679] [ 32.432889] Last potentially related work creation: [ 32.433464] kasan_save_stack+0x22/0x50 [ 32.433963] __kasan_record_aux_stack+0x8e/0xa0 [ 32.434518] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.435143] remove_vma+0x139/0x170 [ 32.435589] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.436137] do_vmi_munmap+0x1f1/0x2b0 [ 32.436613] __vm_munmap+0x138/0x3a0 [ 32.437069] __x64_sys_munmap+0x59/0x80 [ 32.437555] do_syscall_64+0x3f/0x90 [ 32.438019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.438660] [ 32.438868] Second to last potentially related work creation: [ 32.439516] kasan_save_stack+0x22/0x50 [ 32.440016] __kasan_record_aux_stack+0x8e/0xa0 [ 32.440580] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.441220] remove_vma+0x139/0x170 [ 32.441668] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.442217] do_vmi_munmap+0x1f1/0x2b0 [ 32.442693] mmap_region+0x1f9/0x2660 [ 32.443165] do_mmap+0x854/0xf00 [ 32.443609] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.444086] ksys_mmap_pgoff+0x3af/0x500 [ 32.444592] do_syscall_64+0x3f/0x90 [ 32.445063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.445704] [ 32.445925] The buggy address belongs to the object at ffff88800dfeccb0 [ 32.445925] which belongs to the cache vm_area_struct of size 168 [ 32.447399] The buggy address is located 88 bytes inside of [ 32.447399] freed 168-byte region [ffff88800dfeccb0, ffff88800dfecd58) [ 32.448781] [ 32.448993] The buggy address belongs to the physical page: [ 32.449644] page:00000000be142f8d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfec [ 32.450706] memcg:ffff88800df51b01 [ 32.451134] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.451817] page_type: 0xffffffff() [ 32.452270] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 32.453169] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df51b01 [ 32.454079] page dumped because: kasan: bad access detected [ 32.454723] [ 32.454936] Memory state around the buggy address: [ 32.455528] ffff88800dfecc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.456370] ffff88800dfecc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.457207] >ffff88800dfecd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.458039] ^ [ 32.458471] ffff88800dfecd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.459316] ffff88800dfece00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.460158] ================================================================== [ 32.461218] Disabling lock debugging due to kernel taint [ 35.147162] BUG: Bad rss-counter state mm:000000000d378247 type:MM_FILEPAGES val:33 [ 35.148529] BUG: Bad rss-counter state mm:000000000d378247 type:MM_ANONPAGES val:22 [ 35.543650] BUG: Bad rss-counter state mm:000000004ca82f28 type:MM_FILEPAGES val:33 [ 35.545236] BUG: Bad rss-counter state mm:000000004ca82f28 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31752' (ECDSA) to the list of known hosts. 2023/06/21 05:24:32 fuzzer started 2023/06/21 05:24:32 dialing manager at localhost:36067 2023/06/21 05:24:32 checking machine... 2023/06/21 05:24:32 checking revisions... [ 36.300247] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:24:33 testing simple program... [ 36.345705] cgroup: Unknown subsys name 'net' [ 36.410667] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:24:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88800ec87bf0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b960 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 00007fd76be8f900 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=00007fd76c446618 CR3=00000000199ee000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=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=00007f1c1ca605f0 CR3=000000001038c000 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=e55ab8bda1246980b045364a2309a356 XMM02=000000000011a9c8eff9b2d0a8fce9cb XMM03=000000000011aa982c67c8bc2e329bc3 XMM04=dbf65d0ec8df724100000000000ae988 XMM05=9ea0920ae2e4a3d900000000001333c8 XMM06=4fda316b135da52b0000000000133050 XMM07=e042d86d42eb936e0000000000122230 XMM08=a8ab08a0ba78514e000000000011aa98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000