syzkaller login: [ 38.874897] BUG: Bad rss-counter state mm:0000000080587bc1 type:MM_FILEPAGES val:33 [ 38.875922] BUG: Bad rss-counter state mm:0000000080587bc1 type:MM_ANONPAGES val:22 [ 38.914488] ================================================================== [ 38.915654] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.916803] Read of size 8 at addr ffff888019e38968 by task sshd/219 [ 38.917778] [ 38.918048] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.919109] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.920317] Call Trace: [ 38.920719] <TASK> [ 38.921061] dump_stack_lvl+0x91/0xf0 [ 38.921665] print_report+0xcc/0x620 [ 38.922259] ? __virt_addr_valid+0x102/0x340 [ 38.922948] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.923713] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.924458] kasan_report+0xbe/0xf0 [ 38.925034] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.925809] vma_interval_tree_remove+0xc75/0xec0 [ 38.926542] vma_prepare+0xc54/0x11a0 [ 38.927133] __split_vma+0x5af/0x950 [ 38.927714] ? __pfx___split_vma+0x10/0x10 [ 38.928367] ? find_held_lock+0x2c/0x110 [ 38.929010] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.929725] ? lock_is_held_type+0x9f/0x120 [ 38.930382] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.931135] ? mtree_range_walk+0x632/0x900 [ 38.931822] ? mas_walk+0x5c7/0x7c0 [ 38.932385] do_vmi_munmap+0x1f1/0x2b0 [ 38.932968] mmap_region+0x1f9/0x2660 [ 38.933555] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.934172] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.935041] ? __pfx_lock_acquire+0x10/0x10 [ 38.935696] ? __pfx_mmap_region+0x10/0x10 [ 38.936343] ? security_mmap_addr+0x7d/0xa0 [ 38.937010] ? get_unmapped_area+0x1f5/0x3f0 [ 38.937705] do_mmap+0x854/0xf00 [ 38.938243] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.938860] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.939560] ksys_mmap_pgoff+0x3af/0x500 [ 38.940200] do_syscall_64+0x3f/0x90 [ 38.940803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.941626] RIP: 0033:0x7f016fd54d82 [ 38.942331] 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 [ 38.945040] RSP: 002b:00007ffddd232168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.946198] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f016fd54d82 [ 38.947255] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f016f18e000 [ 38.948311] RBP: 00007f016f18e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.949372] R10: 0000000000000812 R11: 0000000000000206 R12: 00005593fa52ed90 [ 38.950416] R13: 00007ffddd232180 R14: 00007ffddd2321b0 R15: 00007ffddd232510 [ 38.951474] </TASK> [ 38.951839] [ 38.952102] Allocated by task 212: [ 38.952626] kasan_save_stack+0x22/0x50 [ 38.953257] kasan_set_track+0x25/0x30 [ 38.953859] __kasan_slab_alloc+0x59/0x70 [ 38.954503] kmem_cache_alloc+0x16b/0x370 [ 38.955127] vm_area_dup+0x20/0x160 [ 38.955694] __split_vma+0x170/0x950 [ 38.956268] split_vma+0xc6/0x110 [ 38.956809] mprotect_fixup+0x8d2/0xb30 [ 38.957428] do_mprotect_pkey+0x87e/0xd40 [ 38.958074] __x64_sys_mprotect+0x78/0xc0 [ 38.958720] do_syscall_64+0x3f/0x90 [ 38.959294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.960092] [ 38.960355] Freed by task 19: [ 38.960827] kasan_save_stack+0x22/0x50 [ 38.961463] kasan_set_track+0x25/0x30 [ 38.962067] kasan_save_free_info+0x2b/0x50 [ 38.962726] __kasan_slab_free+0x10a/0x190 [ 38.963366] kmem_cache_free+0x10d/0x4d0 [ 38.963992] rcu_core+0x8c8/0x2860 [ 38.964537] __do_softirq+0x1b7/0x7d4 [ 38.965127] [ 38.965395] Last potentially related work creation: [ 38.966127] kasan_save_stack+0x22/0x50 [ 38.966757] __kasan_record_aux_stack+0x8e/0xa0 [ 38.967452] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.968233] remove_vma+0x139/0x170 [ 38.968798] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.969505] do_vmi_munmap+0x1f1/0x2b0 [ 38.970044] __vm_munmap+0x138/0x3a0 [ 38.970582] __x64_sys_munmap+0x59/0x80 [ 38.971117] do_syscall_64+0x3f/0x90 [ 38.971653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.972418] [ 38.972686] The buggy address belongs to the object at ffff888019e38910 [ 38.972686] which belongs to the cache vm_area_struct of size 168 [ 38.974201] The buggy address is located 88 bytes inside of [ 38.974201] freed 168-byte region [ffff888019e38910, ffff888019e389b8) [ 38.975516] [ 38.975723] The buggy address belongs to the physical page: [ 38.976347] page:0000000093b8ef56 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e38 [ 38.977397] memcg:ffff8880133f6d01 [ 38.977809] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.978416] page_type: 0xffffffff() [ 38.978849] raw: 0100000000000200 ffff8880087a0c80 ffffea000032c580 dead000000000008 [ 38.979709] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880133f6d01 [ 38.980559] page dumped because: kasan: bad access detected [ 38.981180] [ 38.981395] Memory state around the buggy address: [ 38.981940] ffff888019e38800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.982746] ffff888019e38880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.983552] >ffff888019e38900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.984361] ^ [ 38.985117] ffff888019e38980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.985964] ffff888019e38a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.986804] ================================================================== [ 38.987973] Disabling lock debugging due to kernel taint [ 41.546624] BUG: Bad rss-counter state mm:000000004561a295 type:MM_FILEPAGES val:33 [ 41.547602] BUG: Bad rss-counter state mm:000000004561a295 type:MM_ANONPAGES val:22 [ 42.097902] BUG: Bad rss-counter state mm:00000000bbd05e77 type:MM_FILEPAGES val:33 [ 42.099215] BUG: Bad rss-counter state mm:00000000bbd05e77 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16500' (ECDSA) to the list of known hosts. 2023/06/21 01:24:11 fuzzer started 2023/06/21 01:24:11 dialing manager at localhost:36067 2023/06/21 01:24:11 checking machine... 2023/06/21 01:24:11 checking revisions... [ 42.716685] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:24:11 testing simple program... [ 42.764990] cgroup: Unknown subsys name 'net' [ 42.809878] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:24:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc2b629658 CR3=0000000005482000 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=00007f20669c2510000055e717a96790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f3b8001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f3b7901 RSI=ffff88800f3b7928 RDI=ffff88800f3b7898 RBP=ffff88800f3b78e0 RSP=ffff88800f3b77c0 R8 =ffffffff8608a55a R9 =ffff88800f3b78c8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800f3b78e8 R13=ffff88800f3b78d0 R14=ffff88800f3b7930 R15=ffff88800f3b7888 RIP=ffffffff811304d5 RFL=00000282 [--S----] 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 00007f4b401aa900 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=00007fff090ab000 CR3=000000000cae0000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000