syzkaller login: [ 30.637939] BUG: Bad rss-counter state mm:00000000083ec496 type:MM_FILEPAGES val:33 [ 30.638693] BUG: Bad rss-counter state mm:00000000083ec496 type:MM_ANONPAGES val:22 [ 30.671161] ================================================================== [ 30.672005] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.672857] Read of size 8 at addr ffff8880099ded08 by task sshd/221 [ 30.673457] [ 30.673625] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.674313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.675190] Call Trace: [ 30.675407] [ 30.675640] dump_stack_lvl+0x91/0xf0 [ 30.676020] print_report+0xcc/0x620 [ 30.676444] ? __virt_addr_valid+0x102/0x340 [ 30.676842] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.677273] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.677691] kasan_report+0xbe/0xf0 [ 30.678085] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.678496] vma_interval_tree_remove+0xc75/0xec0 [ 30.678906] vma_prepare+0xc54/0x11a0 [ 30.679238] __split_vma+0x5af/0x950 [ 30.679568] ? __pfx___split_vma+0x10/0x10 [ 30.679917] ? find_held_lock+0x2c/0x110 [ 30.680336] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.680719] ? lock_is_held_type+0x9f/0x120 [ 30.681090] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.681515] ? mtree_range_walk+0x632/0x900 [ 30.681899] ? mas_walk+0x5c7/0x7c0 [ 30.682208] do_vmi_munmap+0x1f1/0x2b0 [ 30.682544] mmap_region+0x1f9/0x2660 [ 30.682857] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.683203] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.683676] ? __pfx_lock_acquire+0x10/0x10 [ 30.684044] ? __pfx_mmap_region+0x10/0x10 [ 30.684418] ? security_mmap_addr+0x7d/0xa0 [ 30.684772] ? get_unmapped_area+0x1f5/0x3f0 [ 30.685135] do_mmap+0x854/0xf00 [ 30.685441] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.685764] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.686130] ksys_mmap_pgoff+0x3af/0x500 [ 30.686474] do_syscall_64+0x3f/0x90 [ 30.686797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.687246] RIP: 0033:0x7f43db735d82 [ 30.687562] 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 [ 30.689035] RSP: 002b:00007ffe2ac8b5e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.689651] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f43db735d82 [ 30.690229] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f43dab6f000 [ 30.690852] RBP: 00007f43dab6f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.691460] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a9ceeb8f70 [ 30.692064] R13: 00007ffe2ac8b600 R14: 00007ffe2ac8b630 R15: 00007ffe2ac8b990 [ 30.692719] [ 30.692931] [ 30.693081] Allocated by task 214: [ 30.693385] kasan_save_stack+0x22/0x50 [ 30.693756] kasan_set_track+0x25/0x30 [ 30.694101] __kasan_slab_alloc+0x59/0x70 [ 30.694470] kmem_cache_alloc+0x16b/0x370 [ 30.694830] vm_area_dup+0x20/0x160 [ 30.695154] __split_vma+0x170/0x950 [ 30.695497] split_vma+0xc6/0x110 [ 30.695801] mprotect_fixup+0x8d2/0xb30 [ 30.696174] do_mprotect_pkey+0x87e/0xd40 [ 30.696577] __x64_sys_mprotect+0x78/0xc0 [ 30.696952] do_syscall_64+0x3f/0x90 [ 30.697295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.697745] [ 30.697904] Freed by task 214: [ 30.698194] kasan_save_stack+0x22/0x50 [ 30.698561] kasan_set_track+0x25/0x30 [ 30.698935] kasan_save_free_info+0x2b/0x50 [ 30.699305] __kasan_slab_free+0x10a/0x190 [ 30.699683] kmem_cache_free+0x10d/0x4d0 [ 30.700030] rcu_core+0x8c8/0x2860 [ 30.700383] __do_softirq+0x1b7/0x7d4 [ 30.700714] [ 30.700865] Last potentially related work creation: [ 30.701270] kasan_save_stack+0x22/0x50 [ 30.701620] __kasan_record_aux_stack+0x8e/0xa0 [ 30.702014] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.702461] remove_vma+0x139/0x170 [ 30.702797] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.703180] do_vmi_munmap+0x1f1/0x2b0 [ 30.703518] __vm_munmap+0x138/0x3a0 [ 30.703838] __x64_sys_munmap+0x59/0x80 [ 30.704218] do_syscall_64+0x3f/0x90 [ 30.704561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.705009] [ 30.705164] The buggy address belongs to the object at ffff8880099decb0 [ 30.705164] which belongs to the cache vm_area_struct of size 168 [ 30.706198] The buggy address is located 88 bytes inside of [ 30.706198] freed 168-byte region [ffff8880099decb0, ffff8880099ded58) [ 30.707174] [ 30.707329] The buggy address belongs to the physical page: [ 30.707786] page:00000000ad2edbd8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99de [ 30.708579] memcg:ffff88800ef1c001 [ 30.708873] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.709331] page_type: 0xffffffff() [ 30.709647] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.710285] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef1c001 [ 30.710915] page dumped because: kasan: bad access detected [ 30.711386] [ 30.711532] Memory state around the buggy address: [ 30.712086] ffff8880099dec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.712701] ffff8880099dec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.713276] >ffff8880099ded00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.713850] ^ [ 30.714136] ffff8880099ded80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.714732] ffff8880099dee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.715319] ================================================================== [ 30.716087] Disabling lock debugging due to kernel taint [ 32.456385] BUG: Bad rss-counter state mm:000000009636ad4f type:MM_FILEPAGES val:33 [ 32.457110] BUG: Bad rss-counter state mm:000000009636ad4f type:MM_ANONPAGES val:22 [ 32.885535] BUG: Bad rss-counter state mm:00000000dd0ce12f type:MM_FILEPAGES val:33 [ 32.886190] BUG: Bad rss-counter state mm:00000000dd0ce12f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11792' (ECDSA) to the list of known hosts. 2023/06/21 08:27:17 fuzzer started 2023/06/21 08:27:17 dialing manager at localhost:36067 2023/06/21 08:27:17 checking machine... 2023/06/21 08:27:17 checking revisions... [ 33.376181] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:27:18 testing simple program... [ 33.420934] cgroup: Unknown subsys name 'net' [ 33.459291] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:27:17 Registers: info registers vcpu 0 RAX=000000000000009d RBX=ffffc90000663818 RCX=0000000000000100 RDX=1ffff110012fa8b3 RSI=ffffffff830164a6 RDI=ffff8880097d45aa RBP=0000000000000000 RSP=ffff88800ed8e8f8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d6e R12=0000000000000018 R13=ffff888019a7a9c0 R14=ffff888009bb0000 R15=ffff8880097d4580 RIP=ffffffff8301653b RFL=00000246 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f17e3eb9900 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=0000558a971555f0 CR3=000000000f0d2000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=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=00007f37eaba85d0 CR3=000000000ebbe000 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=4bff8a9a901de8b65549d0c634b10b77 XMM02=000000000011b830ec2efd57dc4c00df XMM03=00000000001220f8ba52b276be145d16 XMM04=66c1fb47037f86e700000000000ae988 XMM05=e4cb8bb95a7664b60000000000131eb0 XMM06=17185f2089c355a40000000000130d18 XMM07=e042d86d42eb936e0000000000122378 XMM08=ba52b276be145d16000000000011b890 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000