syzkaller login: [ 30.380443] BUG: Bad rss-counter state mm:0000000020e6d738 type:MM_FILEPAGES val:33 [ 30.381521] BUG: Bad rss-counter state mm:0000000020e6d738 type:MM_ANONPAGES val:22 [ 30.551832] ================================================================== [ 30.552806] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.553806] Read of size 8 at addr ffff88801a543a50 by task sshd/221 [ 30.554618] [ 30.554937] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.555592] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.556286] Call Trace: [ 30.556514] [ 30.556718] dump_stack_lvl+0x91/0xf0 [ 30.557067] print_report+0xcc/0x620 [ 30.557413] ? __virt_addr_valid+0x102/0x340 [ 30.557828] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.558265] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.558698] kasan_report+0xbe/0xf0 [ 30.559030] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.559464] vma_interval_tree_remove+0xc75/0xec0 [ 30.559901] vma_prepare+0xc54/0x11a0 [ 30.560240] __split_vma+0x5af/0x950 [ 30.560575] ? __pfx___split_vma+0x10/0x10 [ 30.560951] ? find_held_lock+0x2c/0x110 [ 30.561322] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.561736] ? lock_is_held_type+0x9f/0x120 [ 30.562119] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.562559] ? mtree_range_walk+0x632/0x900 [ 30.562952] ? mas_walk+0x5c7/0x7c0 [ 30.563289] do_vmi_munmap+0x1f1/0x2b0 [ 30.563643] mmap_region+0x1f9/0x2660 [ 30.563992] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.564359] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.564866] ? __pfx_lock_acquire+0x10/0x10 [ 30.565243] ? __pfx_mmap_region+0x10/0x10 [ 30.565637] ? security_mmap_addr+0x7d/0xa0 [ 30.566019] ? get_unmapped_area+0x1f5/0x3f0 [ 30.566409] do_mmap+0x854/0xf00 [ 30.566720] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.567071] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.567470] ksys_mmap_pgoff+0x3af/0x500 [ 30.567833] do_syscall_64+0x3f/0x90 [ 30.568172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.568630] RIP: 0033:0x7f11bb59cd82 [ 30.568955] 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 [ 30.570476] RSP: 002b:00007fffa748a318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.571117] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11bb59cd82 [ 30.571718] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11ba9d6000 [ 30.572312] RBP: 00007f11ba9d6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.572906] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ce6896ec0 [ 30.573497] R13: 00007fffa748a330 R14: 00007fffa748a360 R15: 00007fffa748a6c0 [ 30.574107] [ 30.574309] [ 30.574457] Allocated by task 214: [ 30.574756] kasan_save_stack+0x22/0x50 [ 30.575105] kasan_set_track+0x25/0x30 [ 30.575451] __kasan_slab_alloc+0x59/0x70 [ 30.575814] kmem_cache_alloc+0x16b/0x370 [ 30.576173] vm_area_dup+0x20/0x160 [ 30.576490] __split_vma+0x170/0x950 [ 30.576814] split_vma+0xc6/0x110 [ 30.577125] mprotect_fixup+0x8d2/0xb30 [ 30.577476] do_mprotect_pkey+0x87e/0xd40 [ 30.577849] __x64_sys_mprotect+0x78/0xc0 [ 30.578215] do_syscall_64+0x3f/0x90 [ 30.578543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.578990] [ 30.579140] Freed by task 214: [ 30.579414] kasan_save_stack+0x22/0x50 [ 30.579763] kasan_set_track+0x25/0x30 [ 30.580116] kasan_save_free_info+0x2b/0x50 [ 30.580483] __kasan_slab_free+0x10a/0x190 [ 30.580849] kmem_cache_free+0x10d/0x4d0 [ 30.581201] rcu_core+0x8c8/0x2860 [ 30.581514] __do_softirq+0x1b7/0x7d4 [ 30.581869] [ 30.582017] Last potentially related work creation: [ 30.582424] kasan_save_stack+0x22/0x50 [ 30.582773] __kasan_record_aux_stack+0x8e/0xa0 [ 30.583172] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.583620] remove_vma+0x139/0x170 [ 30.583932] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.584327] do_vmi_munmap+0x1f1/0x2b0 [ 30.584670] __vm_munmap+0x138/0x3a0 [ 30.585001] __x64_sys_munmap+0x59/0x80 [ 30.585356] do_syscall_64+0x3f/0x90 [ 30.585696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.586152] [ 30.586306] The buggy address belongs to the object at ffff88801a5439f8 [ 30.586306] which belongs to the cache vm_area_struct of size 168 [ 30.587338] The buggy address is located 88 bytes inside of [ 30.587338] freed 168-byte region [ffff88801a5439f8, ffff88801a543aa0) [ 30.588331] [ 30.588487] The buggy address belongs to the physical page: [ 30.588955] page:00000000cf756fe0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a543 [ 30.589741] memcg:ffff888017dce901 [ 30.590049] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.590506] page_type: 0xffffffff() [ 30.590829] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.591479] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017dce901 [ 30.592129] page dumped because: kasan: bad access detected [ 30.592605] [ 30.592761] Memory state around the buggy address: [ 30.593177] ffff88801a543900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.593995] ffff88801a543980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.595066] >ffff88801a543a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.596198] ^ [ 30.597057] ffff88801a543a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.598153] ffff88801a543b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.599109] ================================================================== [ 30.600092] Disabling lock debugging due to kernel taint [ 32.605393] BUG: Bad rss-counter state mm:00000000c1a8bad5 type:MM_FILEPAGES val:33 [ 32.607084] BUG: Bad rss-counter state mm:00000000c1a8bad5 type:MM_ANONPAGES val:22 [ 33.086604] BUG: Bad rss-counter state mm:000000009f987db7 type:MM_FILEPAGES val:33 [ 33.087808] BUG: Bad rss-counter state mm:000000009f987db7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1703' (ECDSA) to the list of known hosts. 2023/06/21 07:50:40 fuzzer started 2023/06/21 07:50:40 dialing manager at localhost:36067 2023/06/21 07:50:40 checking machine... 2023/06/21 07:50:40 checking revisions... [ 33.782531] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:50:41 testing simple program... [ 33.830130] cgroup: Unknown subsys name 'net' [ 33.869405] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:50:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800fc1f560 RCX=ffff88800fc1f538 RDX=1ffff11001f83eae RSI=ffffffff813ad720 RDI=ffff88800fc1f570 RBP=ffff88800fc1f530 RSP=ffff88800fc1f478 R8 =0000000000000001 R9 =ffff88800fc1f4d8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800fc1f560 R13=0000000000000000 R14=ffff88800c959b40 R15=0000000000000cc0 RIP=ffffffff813ad496 RFL=00000296 [--S-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 00007f9974197900 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=00007fffcfc2c000 CR3=000000000d7e8000 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=00007fd90462e790 CR3=000000000c9a2000 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=90c5053ad5bcf193824459defa95389d XMM02=000000000011bf88eff9b2d0a8fce9cb XMM03=000000000011c0582c67c8bc2e329bc3 XMM04=37a23e8996443bd200000000000ae988 XMM05=b93514fd53d60a180000000000133148 XMM06=c291bd5c70af25b90000000000132dd0 XMM07=e042d86d42eb936e0000000000123af0 XMM08=ef72b563e6a82d24000000000011c058 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000