syzkaller login: [ 28.756039] BUG: Bad rss-counter state mm:0000000055ccee2e type:MM_FILEPAGES val:33 [ 28.757703] BUG: Bad rss-counter state mm:0000000055ccee2e type:MM_ANONPAGES val:22 [ 28.920785] ================================================================== [ 28.921713] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.922752] Read of size 8 at addr ffff88800f570a50 by task sshd/220 [ 28.923665] [ 28.923921] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.924955] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.925946] Call Trace: [ 28.926295] [ 28.926602] dump_stack_lvl+0x91/0xf0 [ 28.927089] print_report+0xcc/0x620 [ 28.927577] ? __virt_addr_valid+0x102/0x340 [ 28.928129] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.928737] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.929357] kasan_report+0xbe/0xf0 [ 28.929876] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.930556] vma_interval_tree_remove+0xc75/0xec0 [ 28.931186] vma_prepare+0xc54/0x11a0 [ 28.931674] __split_vma+0x5af/0x950 [ 28.932166] ? __pfx___split_vma+0x10/0x10 [ 28.932717] ? find_held_lock+0x2c/0x110 [ 28.933264] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.933878] ? lock_is_held_type+0x9f/0x120 [ 28.934477] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.935128] ? mtree_range_walk+0x632/0x900 [ 28.935711] ? mas_walk+0x5c7/0x7c0 [ 28.936200] do_vmi_munmap+0x1f1/0x2b0 [ 28.936708] mmap_region+0x1f9/0x2660 [ 28.937208] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.937750] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.938529] ? __pfx_lock_acquire+0x10/0x10 [ 28.939090] ? __pfx_mmap_region+0x10/0x10 [ 28.939638] ? security_mmap_addr+0x7d/0xa0 [ 28.940182] ? get_unmapped_area+0x1f5/0x3f0 [ 28.940760] do_mmap+0x854/0xf00 [ 28.941215] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.941750] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.942370] ksys_mmap_pgoff+0x3af/0x500 [ 28.942899] do_syscall_64+0x3f/0x90 [ 28.943398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.944066] RIP: 0033:0x7f075f9fbd82 [ 28.944540] 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 [ 28.946798] RSP: 002b:00007ffe6b291588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.947734] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f075f9fbd82 [ 28.948618] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f075ee35000 [ 28.949506] RBP: 00007f075ee35000 R08: 0000000000000009 R09: 0000000000001000 [ 28.950448] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee61276ec0 [ 28.951324] R13: 00007ffe6b2915a0 R14: 00007ffe6b2915d0 R15: 00007ffe6b291930 [ 28.952212] [ 28.952518] [ 28.952739] Allocated by task 212: [ 28.953181] kasan_save_stack+0x22/0x50 [ 28.953717] kasan_set_track+0x25/0x30 [ 28.954260] __kasan_slab_alloc+0x59/0x70 [ 28.954804] kmem_cache_alloc+0x16b/0x370 [ 28.955338] vm_area_dup+0x20/0x160 [ 28.955813] __split_vma+0x170/0x950 [ 28.956291] split_vma+0xc6/0x110 [ 28.956745] mprotect_fixup+0x8d2/0xb30 [ 28.957278] do_mprotect_pkey+0x87e/0xd40 [ 28.957850] __x64_sys_mprotect+0x78/0xc0 [ 28.958432] do_syscall_64+0x3f/0x90 [ 28.958930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.959602] [ 28.959822] Freed by task 212: [ 28.960226] kasan_save_stack+0x22/0x50 [ 28.960748] kasan_set_track+0x25/0x30 [ 28.961257] kasan_save_free_info+0x2b/0x50 [ 28.961826] __kasan_slab_free+0x10a/0x190 [ 28.962405] kmem_cache_free+0x10d/0x4d0 [ 28.962938] rcu_core+0x8c8/0x2860 [ 28.963402] __do_softirq+0x1b7/0x7d4 [ 28.963900] [ 28.964120] Last potentially related work creation: [ 28.964723] kasan_save_stack+0x22/0x50 [ 28.965249] __kasan_record_aux_stack+0x8e/0xa0 [ 28.965879] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.966577] remove_vma+0x139/0x170 [ 28.967047] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.967621] do_vmi_munmap+0x1f1/0x2b0 [ 28.968126] __vm_munmap+0x138/0x3a0 [ 28.968609] __x64_sys_munmap+0x59/0x80 [ 28.969119] do_syscall_64+0x3f/0x90 [ 28.969621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.970338] [ 28.970559] The buggy address belongs to the object at ffff88800f5709f8 [ 28.970559] which belongs to the cache vm_area_struct of size 168 [ 28.972096] The buggy address is located 88 bytes inside of [ 28.972096] freed 168-byte region [ffff88800f5709f8, ffff88800f570aa0) [ 28.973555] [ 28.973783] The buggy address belongs to the physical page: [ 28.974501] page:0000000045becd2d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf570 [ 28.975639] memcg:ffff888016b34301 [ 28.976079] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.976745] page_type: 0xffffffff() [ 28.977210] raw: 0100000000000200 ffff8880087a0c80 ffffea00002536c0 dead000000000004 [ 28.978221] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b34301 [ 28.979169] page dumped because: kasan: bad access detected [ 28.979861] [ 28.980082] Memory state around the buggy address: [ 28.980680] ffff88800f570900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.981578] ffff88800f570980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 28.982499] >ffff88800f570a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.983387] ^ [ 28.984114] ffff88800f570a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 28.985006] ffff88800f570b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.985900] ================================================================== [ 28.986955] Disabling lock debugging due to kernel taint [ 31.124704] BUG: Bad rss-counter state mm:00000000e6c1ad5b type:MM_FILEPAGES val:33 [ 31.125898] BUG: Bad rss-counter state mm:00000000e6c1ad5b type:MM_ANONPAGES val:22 [ 31.582659] BUG: Bad rss-counter state mm:000000000de210be type:MM_FILEPAGES val:33 [ 31.583821] BUG: Bad rss-counter state mm:000000000de210be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37366' (ECDSA) to the list of known hosts. 2023/06/20 16:00:04 fuzzer started 2023/06/20 16:00:04 dialing manager at localhost:36067 2023/06/20 16:00:05 checking machine... 2023/06/20 16:00:05 checking revisions... [ 32.201196] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:00:05 testing simple program... [ 32.253487] cgroup: Unknown subsys name 'net' [ 32.294344] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:00:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008f7a000 RCX=0000000000000000 RDX=1ffff110011ef406 RSI=ffffffff818df157 RDI=ffff888008f7a030 RBP=ffff888019254000 RSP=ffff888016ddfca8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff888019254088 R15=ffff8880192540d8 RIP=ffffffff818df198 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 00007fef09376900 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=00007fef0992d618 CR3=000000000e4fa000 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=563412feff00545000000000000080fe 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=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=00007f748cd6b540 CR3=000000000e91c000 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=a30416965f5c32b3aa464b65c2db79b5 XMM02=ec2efd57dc4c00df000000000011abe8 XMM03=339b3d67ecd43452000000000011acb8 XMM04=6489f0a1e3b3808800000000000ae988 XMM05=19e9129bd510f23500000000001317a0 XMM06=4fda316b135da52b0000000000131628 XMM07=e042d86d42eb936e0000000000121490 XMM08=339b3d67ecd43452000000000011acb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000