syzkaller login: [ 39.425142] BUG: Bad rss-counter state mm:00000000f2af0553 type:MM_FILEPAGES val:33 [ 39.426199] BUG: Bad rss-counter state mm:00000000f2af0553 type:MM_ANONPAGES val:22 [ 39.595872] ================================================================== [ 39.596925] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.598204] Read of size 8 at addr ffff8880196ed3f8 by task sshd/219 [ 39.598935] [ 39.599149] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.599955] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.600885] Call Trace: [ 39.601188] [ 39.601456] dump_stack_lvl+0x91/0xf0 [ 39.601931] print_report+0xcc/0x620 [ 39.602391] ? __virt_addr_valid+0x102/0x340 [ 39.602917] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.603497] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.604085] kasan_report+0xbe/0xf0 [ 39.604534] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.605124] vma_interval_tree_remove+0xc75/0xec0 [ 39.605715] vma_prepare+0xc54/0x11a0 [ 39.606180] __split_vma+0x5af/0x950 [ 39.606634] ? __pfx___split_vma+0x10/0x10 [ 39.607159] ? find_held_lock+0x2c/0x110 [ 39.607661] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.608206] ? lock_is_held_type+0x9f/0x120 [ 39.608720] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.609310] ? mtree_range_walk+0x632/0x900 [ 39.609858] ? mas_walk+0x5c7/0x7c0 [ 39.610315] do_vmi_munmap+0x1f1/0x2b0 [ 39.610784] mmap_region+0x1f9/0x2660 [ 39.611267] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.611765] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.612455] ? __pfx_lock_acquire+0x10/0x10 [ 39.612983] ? __pfx_mmap_region+0x10/0x10 [ 39.613505] ? security_mmap_addr+0x7d/0xa0 [ 39.614030] ? get_unmapped_area+0x1f5/0x3f0 [ 39.614566] do_mmap+0x854/0xf00 [ 39.614996] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.615482] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.616031] ksys_mmap_pgoff+0x3af/0x500 [ 39.616524] do_syscall_64+0x3f/0x90 [ 39.616997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.617644] RIP: 0033:0x7f8617661d82 [ 39.618093] 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 [ 39.620152] RSP: 002b:00007ffd8a5ef5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.621026] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8617661d82 [ 39.621854] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8616a9b000 [ 39.622676] RBP: 00007f8616a9b000 R08: 0000000000000009 R09: 0000000000001000 [ 39.623490] R10: 0000000000000812 R11: 0000000000000206 R12: 000056072436aec0 [ 39.624310] R13: 00007ffd8a5ef5d0 R14: 00007ffd8a5ef600 R15: 00007ffd8a5ef960 [ 39.625142] [ 39.625426] [ 39.625658] Allocated by task 212: [ 39.626074] kasan_save_stack+0x22/0x50 [ 39.626561] kasan_set_track+0x25/0x30 [ 39.627046] __kasan_slab_alloc+0x59/0x70 [ 39.627561] kmem_cache_alloc+0x16b/0x370 [ 39.628060] vm_area_dup+0x20/0x160 [ 39.628498] __split_vma+0x170/0x950 [ 39.628949] split_vma+0xc6/0x110 [ 39.629368] mprotect_fixup+0x8d2/0xb30 [ 39.629860] do_mprotect_pkey+0x87e/0xd40 [ 39.630376] __x64_sys_mprotect+0x78/0xc0 [ 39.630878] do_syscall_64+0x3f/0x90 [ 39.631344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.631959] [ 39.632166] Freed by task 212: [ 39.632537] kasan_save_stack+0x22/0x50 [ 39.633030] kasan_set_track+0x25/0x30 [ 39.633503] kasan_save_free_info+0x2b/0x50 [ 39.634050] __kasan_slab_free+0x10a/0x190 [ 39.634568] kmem_cache_free+0x10d/0x4d0 [ 39.635061] rcu_core+0x8c8/0x2860 [ 39.635503] __do_softirq+0x1b7/0x7d4 [ 39.635970] [ 39.636181] Last potentially related work creation: [ 39.636741] kasan_save_stack+0x22/0x50 [ 39.637237] __kasan_record_aux_stack+0x8e/0xa0 [ 39.637797] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.638426] remove_vma+0x139/0x170 [ 39.638863] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.639486] do_vmi_munmap+0x1f1/0x2b0 [ 39.639953] __vm_munmap+0x138/0x3a0 [ 39.640411] __x64_sys_munmap+0x59/0x80 [ 39.640891] do_syscall_64+0x3f/0x90 [ 39.641345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.641982] [ 39.642192] The buggy address belongs to the object at ffff8880196ed3a0 [ 39.642192] which belongs to the cache vm_area_struct of size 168 [ 39.643617] The buggy address is located 88 bytes inside of [ 39.643617] freed 168-byte region [ffff8880196ed3a0, ffff8880196ed448) [ 39.644978] [ 39.645189] The buggy address belongs to the physical page: [ 39.645843] page:0000000074af0191 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x196ed [ 39.646865] memcg:ffff88800ca75d01 [ 39.647267] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.647874] page_type: 0xffffffff() [ 39.648299] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.649161] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca75d01 [ 39.650022] page dumped because: kasan: bad access detected [ 39.650649] [ 39.650855] Memory state around the buggy address: [ 39.651404] ffff8880196ed280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.652204] ffff8880196ed300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.653007] >ffff8880196ed380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.653829] ^ [ 39.654621] ffff8880196ed400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.655427] ffff8880196ed480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.656239] ================================================================== [ 39.657407] Disabling lock debugging due to kernel taint [ 41.851160] BUG: Bad rss-counter state mm:00000000380ee7b0 type:MM_FILEPAGES val:33 [ 41.852170] BUG: Bad rss-counter state mm:00000000380ee7b0 type:MM_ANONPAGES val:22 [ 42.291838] BUG: Bad rss-counter state mm:00000000af7eb7db type:MM_FILEPAGES val:33 [ 42.293075] BUG: Bad rss-counter state mm:00000000af7eb7db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3157' (ECDSA) to the list of known hosts. 2023/06/20 01:27:14 fuzzer started 2023/06/20 01:27:15 dialing manager at localhost:44161 2023/06/20 01:27:15 checking machine... 2023/06/20 01:27:15 checking revisions... [ 42.952873] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:27:15 testing simple program... [ 43.005233] cgroup: Unknown subsys name 'net' [ 43.063414] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:27:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000001255 RCX=ffffffff81534376 RDX=0000000000000001 RSI=0000000000000014 RDI=ffffffff85d3ca10 RBP=ffff8880168e2000 RSP=ffff88801cd87e58 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff8880168e2000 R13=00007ff54e18e618 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff81830f14 RFL=00000002 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff54dbd7900 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=00007ff54e18e618 CR3=000000000c99a000 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=ffffffff85616740 RBX=ffffffff85d3d010 RCX=1ffffffff0ba7a02 RDX=1ffff1100d9e7458 RSI=00000000fffc0f82 RDI=ffffffff85616780 RBP=000000000000712d RSP=ffff88806cf09c58 R8 =00000000fffda9aa R9 =fffffbfff0ba77da R10=000000000000712d R11=0000001c31fe4ddc R12=ffffffff85d3bf9c R13=ffff88806cf3a2c0 R14=1ffff1100d9e139c R15=0000000000000000 RIP=ffffffff8137cd34 RFL=00000012 [----A--] 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 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=00007fe47e592b00 CR3=0000000017e5a000 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=2034313a37323a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a37323a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000