syzkaller login: [ 36.723560] BUG: Bad rss-counter state mm:000000004c0046d9 type:MM_FILEPAGES val:33 [ 36.724821] BUG: Bad rss-counter state mm:000000004c0046d9 type:MM_ANONPAGES val:22 [ 36.903920] ================================================================== [ 36.904896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.905904] Read of size 8 at addr ffff88800c63e4e0 by task sshd/220 [ 36.906803] [ 36.907034] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.907960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.909023] Call Trace: [ 36.909368] [ 36.909675] dump_stack_lvl+0x91/0xf0 [ 36.910215] print_report+0xcc/0x620 [ 36.910738] ? __virt_addr_valid+0x102/0x340 [ 36.911332] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.911992] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.912647] kasan_report+0xbe/0xf0 [ 36.913156] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.913833] vma_interval_tree_remove+0xc75/0xec0 [ 36.914498] vma_prepare+0xc54/0x11a0 [ 36.915030] __split_vma+0x5af/0x950 [ 36.915547] ? __pfx___split_vma+0x10/0x10 [ 36.916133] ? find_held_lock+0x2c/0x110 [ 36.916718] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.917341] ? lock_is_held_type+0x9f/0x120 [ 36.917962] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.918634] ? mtree_range_walk+0x632/0x900 [ 36.919240] ? mas_walk+0x5c7/0x7c0 [ 36.919765] do_vmi_munmap+0x1f1/0x2b0 [ 36.920310] mmap_region+0x1f9/0x2660 [ 36.920851] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.921422] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.922226] ? __pfx_lock_acquire+0x10/0x10 [ 36.922820] ? __pfx_mmap_region+0x10/0x10 [ 36.923405] ? security_mmap_addr+0x7d/0xa0 [ 36.923993] ? get_unmapped_area+0x1f5/0x3f0 [ 36.924602] do_mmap+0x854/0xf00 [ 36.925093] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.925640] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.926282] ksys_mmap_pgoff+0x3af/0x500 [ 36.926844] do_syscall_64+0x3f/0x90 [ 36.927375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.928096] RIP: 0033:0x7fe032309d82 [ 36.928605] 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 [ 36.930935] RSP: 002b:00007fff4d1222c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.931912] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe032309d82 [ 36.932822] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe031743000 [ 36.933742] RBP: 00007fe031743000 R08: 0000000000000009 R09: 0000000000001000 [ 36.934645] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca9024bec0 [ 36.935549] R13: 00007fff4d1222e0 R14: 00007fff4d122310 R15: 00007fff4d122670 [ 36.936463] [ 36.936776] [ 36.937011] Allocated by task 213: [ 36.937469] kasan_save_stack+0x22/0x50 [ 36.938030] kasan_set_track+0x25/0x30 [ 36.938562] __kasan_slab_alloc+0x59/0x70 [ 36.939120] kmem_cache_alloc+0x16b/0x370 [ 36.939676] vm_area_dup+0x20/0x160 [ 36.940166] __split_vma+0x170/0x950 [ 36.940665] split_vma+0xc6/0x110 [ 36.941139] mprotect_fixup+0x8d2/0xb30 [ 36.941682] do_mprotect_pkey+0x87e/0xd40 [ 36.942262] __x64_sys_mprotect+0x78/0xc0 [ 36.942825] do_syscall_64+0x3f/0x90 [ 36.943337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.944028] [ 36.944260] Freed by task 19: [ 36.944680] kasan_save_stack+0x22/0x50 [ 36.945222] kasan_set_track+0x25/0x30 [ 36.945769] kasan_save_free_info+0x2b/0x50 [ 36.946351] __kasan_slab_free+0x10a/0x190 [ 36.946920] kmem_cache_free+0x10d/0x4d0 [ 36.947464] rcu_core+0x8c8/0x2860 [ 36.947942] __do_softirq+0x1b7/0x7d4 [ 36.948449] [ 36.948685] Last potentially related work creation: [ 36.949312] kasan_save_stack+0x22/0x50 [ 36.949858] __kasan_record_aux_stack+0x8e/0xa0 [ 36.950478] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.951192] remove_vma+0x139/0x170 [ 36.951675] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.952267] do_vmi_munmap+0x1f1/0x2b0 [ 36.952788] __vm_munmap+0x138/0x3a0 [ 36.953279] __x64_sys_munmap+0x59/0x80 [ 36.953814] do_syscall_64+0x3f/0x90 [ 36.954314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.955004] [ 36.955231] The buggy address belongs to the object at ffff88800c63e488 [ 36.955231] which belongs to the cache vm_area_struct of size 168 [ 36.956781] The buggy address is located 88 bytes inside of [ 36.956781] freed 168-byte region [ffff88800c63e488, ffff88800c63e530) [ 36.958280] [ 36.958507] The buggy address belongs to the physical page: [ 36.959207] page:00000000e001cec3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc63e [ 36.960374] memcg:ffff88800d2c9d01 [ 36.960845] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.961567] page_type: 0xffffffff() [ 36.962076] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.963091] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2c9d01 [ 36.964104] page dumped because: kasan: bad access detected [ 36.964847] [ 36.965086] Memory state around the buggy address: [ 36.965739] ffff88800c63e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.966700] ffff88800c63e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 36.967652] >ffff88800c63e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.968600] ^ [ 36.969435] ffff88800c63e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 36.970412] ffff88800c63e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.971370] ================================================================== [ 36.972724] Disabling lock debugging due to kernel taint [ 38.914294] BUG: Bad rss-counter state mm:00000000740d0e66 type:MM_FILEPAGES val:33 [ 38.914886] BUG: Bad rss-counter state mm:00000000740d0e66 type:MM_ANONPAGES val:22 [ 39.311060] BUG: Bad rss-counter state mm:000000007d729e0d type:MM_FILEPAGES val:33 [ 39.312132] BUG: Bad rss-counter state mm:000000007d729e0d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63128' (ECDSA) to the list of known hosts. 2023/06/20 03:04:09 fuzzer started 2023/06/20 03:04:09 dialing manager at localhost:44161 2023/06/20 03:04:09 checking machine... 2023/06/20 03:04:09 checking revisions... [ 40.038201] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:04:09 testing simple program... [ 40.081341] cgroup: Unknown subsys name 'net' [ 40.120408] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:04:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015c50000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c84fa RDI=ffff888015c503f4 RBP=ffff888015c50000 RSP=ffff88800dd4f548 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888015c50000 R13=0000000000000000 R14=ffffffff85652a88 R15=0000000000092cc0 RIP=ffffffff8137454d RFL=00000217 [----APC] 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 00007fa2ad78b900 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=0000556319396954 CR3=0000000016fd0000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fb06e4ba060 CR3=000000000e9b0000 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=34303a3330203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343232 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000