syzkaller login: [ 30.732212] BUG: Bad rss-counter state mm:0000000047f4c506 type:MM_FILEPAGES val:33 [ 30.733472] BUG: Bad rss-counter state mm:0000000047f4c506 type:MM_ANONPAGES val:22 [ 30.897157] ================================================================== [ 30.898240] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.899355] Read of size 8 at addr ffff8880165fa3f8 by task sshd/221 [ 30.900392] [ 30.900646] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.901631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.903022] Call Trace: [ 30.903492] [ 30.903930] dump_stack_lvl+0x91/0xf0 [ 30.904663] print_report+0xcc/0x620 [ 30.905333] ? __virt_addr_valid+0x102/0x340 [ 30.906094] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.906971] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.907817] kasan_report+0xbe/0xf0 [ 30.908478] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.909330] vma_interval_tree_remove+0xc75/0xec0 [ 30.910154] vma_prepare+0xc54/0x11a0 [ 30.910839] __split_vma+0x5af/0x950 [ 30.911465] ? __pfx___split_vma+0x10/0x10 [ 30.912096] ? find_held_lock+0x2c/0x110 [ 30.912723] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.913411] ? lock_is_held_type+0x9f/0x120 [ 30.914068] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.914806] ? mtree_range_walk+0x632/0x900 [ 30.915462] ? mas_walk+0x5c7/0x7c0 [ 30.916026] do_vmi_munmap+0x1f1/0x2b0 [ 30.916600] mmap_region+0x1f9/0x2660 [ 30.917176] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.917784] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.918647] ? __pfx_lock_acquire+0x10/0x10 [ 30.919295] ? __pfx_mmap_region+0x10/0x10 [ 30.919935] ? security_mmap_addr+0x7d/0xa0 [ 30.920579] ? get_unmapped_area+0x1f5/0x3f0 [ 30.921244] do_mmap+0x854/0xf00 [ 30.921770] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.922396] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.923082] ksys_mmap_pgoff+0x3af/0x500 [ 30.923689] do_syscall_64+0x3f/0x90 [ 30.924253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.925019] RIP: 0033:0x7fa48ac8fd82 [ 30.925570] 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 [ 30.928141] RSP: 002b:00007ffecefbccb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.929219] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa48ac8fd82 [ 30.930239] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa48a0c9000 [ 30.931270] RBP: 00007fa48a0c9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.932262] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e7bd36ec0 [ 30.933270] R13: 00007ffecefbccd0 R14: 00007ffecefbcd00 R15: 00007ffecefbd060 [ 30.934322] [ 30.934673] [ 30.934934] Allocated by task 214: [ 30.935445] kasan_save_stack+0x22/0x50 [ 30.936037] kasan_set_track+0x25/0x30 [ 30.936621] __kasan_slab_alloc+0x59/0x70 [ 30.937235] kmem_cache_alloc+0x16b/0x370 [ 30.937841] vm_area_dup+0x20/0x160 [ 30.938383] __split_vma+0x170/0x950 [ 30.938927] split_vma+0xc6/0x110 [ 30.939447] mprotect_fixup+0x8d2/0xb30 [ 30.940030] do_mprotect_pkey+0x87e/0xd40 [ 30.940717] __x64_sys_mprotect+0x78/0xc0 [ 30.941331] do_syscall_64+0x3f/0x90 [ 30.941888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.942666] [ 30.942926] Freed by task 13: [ 30.943388] kasan_save_stack+0x22/0x50 [ 30.943984] kasan_set_track+0x25/0x30 [ 30.944566] kasan_save_free_info+0x2b/0x50 [ 30.945191] __kasan_slab_free+0x10a/0x190 [ 30.945826] kmem_cache_free+0x10d/0x4d0 [ 30.946437] rcu_core+0x8c8/0x2860 [ 30.946960] __do_softirq+0x1b7/0x7d4 [ 30.947523] [ 30.947781] Last potentially related work creation: [ 30.948474] kasan_save_stack+0x22/0x50 [ 30.949068] __kasan_record_aux_stack+0x8e/0xa0 [ 30.949769] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.950546] remove_vma+0x139/0x170 [ 30.951076] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.951729] do_vmi_munmap+0x1f1/0x2b0 [ 30.952297] __vm_munmap+0x138/0x3a0 [ 30.952848] __x64_sys_munmap+0x59/0x80 [ 30.953426] do_syscall_64+0x3f/0x90 [ 30.953977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.954751] [ 30.955008] The buggy address belongs to the object at ffff8880165fa3a0 [ 30.955008] which belongs to the cache vm_area_struct of size 168 [ 30.956754] The buggy address is located 88 bytes inside of [ 30.956754] freed 168-byte region [ffff8880165fa3a0, ffff8880165fa448) [ 30.958416] [ 30.958669] The buggy address belongs to the physical page: [ 30.959449] page:0000000028e7c63c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165fa [ 30.960758] memcg:ffff88800eec2501 [ 30.961265] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.962017] page_type: 0xffffffff() [ 30.962564] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.963642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eec2501 [ 30.964710] page dumped because: kasan: bad access detected [ 30.965486] [ 30.965736] Memory state around the buggy address: [ 30.966426] ffff8880165fa280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.967422] ffff8880165fa300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.968431] >ffff8880165fa380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.969455] ^ [ 30.970470] ffff8880165fa400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.971469] ffff8880165fa480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.972463] ================================================================== [ 30.973562] Disabling lock debugging due to kernel taint [ 32.874553] BUG: Bad rss-counter state mm:000000009536e3ef type:MM_FILEPAGES val:33 [ 32.875517] BUG: Bad rss-counter state mm:000000009536e3ef type:MM_ANONPAGES val:22 [ 33.439230] BUG: Bad rss-counter state mm:00000000c0f8c061 type:MM_FILEPAGES val:33 [ 33.440408] BUG: Bad rss-counter state mm:00000000c0f8c061 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49326' (ECDSA) to the list of known hosts. 2023/06/19 23:02:12 fuzzer started 2023/06/19 23:02:12 dialing manager at localhost:44161 2023/06/19 23:02:12 checking machine... 2023/06/19 23:02:12 checking revisions... [ 34.154098] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:02:13 testing simple program... [ 34.210930] cgroup: Unknown subsys name 'net' [ 34.253293] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:02:12 Registers: info registers vcpu 0 RAX=ffffffff83c13a0c RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028d2e8c RSI=ffffffff83c13a0c RDI=ffff8880146974d0 RBP=ffff8880146974a0 RSP=ffff888014697400 R8 =0000000000000001 R9 =ffff888014697448 R10=0000000000038001 R11=0000000000038891 R12=ffff8880146974d0 R13=0000000000000000 R14=ffff888014601b40 R15=000000000000001e RIP=ffffffff84532440 RFL=00000286 [--S--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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe6205f6900 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=00007fe61fb16048 CR3=000000000d7fc000 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=70bf18a04f2090befd49a0e03fc04ddd XMM02=000000000011ca70d59e07bde36eea69 XMM03=000000000011cb98ec2efd57dc4c00df XMM04=69ccf3e259af80ec00000000000ae988 XMM05=b897ad42844c643c0000000000134dd0 XMM06=e4cb8bb95a7664b60000000000133c88 XMM07=fb795ef6d65770560000000000124110 XMM08=2c67c8bc2e329bc3000000000011cb98 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015b98000 RBX=ffff888019c07640 RCX=ffffffff81132ffe RDX=ffff888019c07558 RSI=0000000000000000 RDI=ffff888019c07618 RBP=ffff888015b98000 RSP=ffff888019c07558 R8 =0000000000000100 R9 =0000000000000000 R10=ffff888019c075a8 R11=00000000000b6996 R12=0000000000000000 R13=ffff888019c075d0 R14=ffff888019c075f0 R15=ffff888019c075a8 RIP=ffffffff81133010 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fafb5348900 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=00007ffe82e5e000 CR3=000000000d92e000 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=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