syzkaller login: [ 28.725111] BUG: Bad rss-counter state mm:00000000ddff3cb7 type:MM_FILEPAGES val:33 [ 28.725887] BUG: Bad rss-counter state mm:00000000ddff3cb7 type:MM_ANONPAGES val:22 [ 28.880957] ================================================================== [ 28.881811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.882684] Read of size 8 at addr ffff888009a755c8 by task sshd/221 [ 28.883410] [ 28.883617] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.884610] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.885520] Call Trace: [ 28.885821] [ 28.886087] dump_stack_lvl+0x91/0xf0 [ 28.886644] print_report+0xcc/0x620 [ 28.887273] ? __virt_addr_valid+0x102/0x340 [ 28.887935] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.888666] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889402] kasan_report+0xbe/0xf0 [ 28.889995] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.890848] vma_interval_tree_remove+0xc75/0xec0 [ 28.891668] vma_prepare+0xc54/0x11a0 [ 28.892306] __split_vma+0x5af/0x950 [ 28.892948] ? __pfx___split_vma+0x10/0x10 [ 28.893651] ? find_held_lock+0x2c/0x110 [ 28.894340] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.895113] ? lock_is_held_type+0x9f/0x120 [ 28.895848] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.896660] ? mtree_range_walk+0x632/0x900 [ 28.897401] ? mas_walk+0x5c7/0x7c0 [ 28.898043] do_vmi_munmap+0x1f1/0x2b0 [ 28.898700] mmap_region+0x1f9/0x2660 [ 28.899360] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.899739] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.900262] ? __pfx_lock_acquire+0x10/0x10 [ 28.900649] ? __pfx_mmap_region+0x10/0x10 [ 28.901039] ? security_mmap_addr+0x7d/0xa0 [ 28.901430] ? get_unmapped_area+0x1f5/0x3f0 [ 28.901834] do_mmap+0x854/0xf00 [ 28.902155] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.902516] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.902939] ksys_mmap_pgoff+0x3af/0x500 [ 28.903315] do_syscall_64+0x3f/0x90 [ 28.903668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.904139] RIP: 0033:0x7fccf1007d82 [ 28.904469] 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 [ 28.906010] RSP: 002b:00007ffdc2f90ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.906667] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccf1007d82 [ 28.907291] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccf0441000 [ 28.907913] RBP: 00007fccf0441000 R08: 0000000000000009 R09: 0000000000001000 [ 28.908532] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c74dfcaf70 [ 28.909150] R13: 00007ffdc2f90d00 R14: 00007ffdc2f90d30 R15: 00007ffdc2f91090 [ 28.909773] [ 28.909988] [ 28.910146] Allocated by task 213: [ 28.910456] kasan_save_stack+0x22/0x50 [ 28.910829] kasan_set_track+0x25/0x30 [ 28.911212] __kasan_slab_alloc+0x59/0x70 [ 28.911600] kmem_cache_alloc+0x16b/0x370 [ 28.911977] vm_area_dup+0x20/0x160 [ 28.912309] __split_vma+0x170/0x950 [ 28.912658] split_vma+0xc6/0x110 [ 28.912981] mprotect_fixup+0x8d2/0xb30 [ 28.913350] do_mprotect_pkey+0x87e/0xd40 [ 28.913738] __x64_sys_mprotect+0x78/0xc0 [ 28.914119] do_syscall_64+0x3f/0x90 [ 28.914469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.914943] [ 28.915106] Freed by task 204: [ 28.915395] kasan_save_stack+0x22/0x50 [ 28.915769] kasan_set_track+0x25/0x30 [ 28.916133] kasan_save_free_info+0x2b/0x50 [ 28.916521] __kasan_slab_free+0x10a/0x190 [ 28.916913] kmem_cache_free+0x10d/0x4d0 [ 28.917286] rcu_core+0x8c8/0x2860 [ 28.917610] __do_softirq+0x1b7/0x7d4 [ 28.917960] [ 28.918122] Last potentially related work creation: [ 28.918550] kasan_save_stack+0x22/0x50 [ 28.918926] __kasan_record_aux_stack+0x8e/0xa0 [ 28.919344] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.919813] remove_vma+0x139/0x170 [ 28.920142] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.920549] do_vmi_munmap+0x1f1/0x2b0 [ 28.920904] __vm_munmap+0x138/0x3a0 [ 28.921248] __x64_sys_munmap+0x59/0x80 [ 28.921614] do_syscall_64+0x3f/0x90 [ 28.921960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.922436] [ 28.922597] Second to last potentially related work creation: [ 28.923109] kasan_save_stack+0x22/0x50 [ 28.923479] __kasan_record_aux_stack+0x8e/0xa0 [ 28.923897] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.924379] remove_vma+0x139/0x170 [ 28.924707] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.925204] do_vmi_munmap+0x1f1/0x2b0 [ 28.925560] __vm_munmap+0x138/0x3a0 [ 28.925903] elf_map+0x26f/0x310 [ 28.926232] load_elf_binary+0xd82/0x5030 [ 28.926623] bprm_execve+0x803/0x1940 [ 28.926975] do_execveat_common+0x734/0x8e0 [ 28.927362] __x64_sys_execve+0x93/0xc0 [ 28.927724] do_syscall_64+0x3f/0x90 [ 28.928069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.928543] [ 28.928702] The buggy address belongs to the object at ffff888009a75570 [ 28.928702] which belongs to the cache vm_area_struct of size 168 [ 28.929766] The buggy address is located 88 bytes inside of [ 28.929766] freed 168-byte region [ffff888009a75570, ffff888009a75618) [ 28.930777] [ 28.930956] The buggy address belongs to the physical page: [ 28.931438] page:00000000c972b1a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a75 [ 28.932225] memcg:ffff88800d2d2801 [ 28.932537] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.933010] page_type: 0xffffffff() [ 28.933340] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 28.934007] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2d2801 [ 28.934662] page dumped because: kasan: bad access detected [ 28.935150] [ 28.935308] Memory state around the buggy address: [ 28.935736] ffff888009a75480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.936362] ffff888009a75500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 28.936983] >ffff888009a75580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.937607] ^ [ 28.938089] ffff888009a75600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 28.938709] ffff888009a75680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.939336] ================================================================== [ 28.940013] Disabling lock debugging due to kernel taint [ 30.691571] BUG: Bad rss-counter state mm:00000000a2382f19 type:MM_FILEPAGES val:33 [ 30.692499] BUG: Bad rss-counter state mm:00000000a2382f19 type:MM_ANONPAGES val:22 [ 31.167600] BUG: Bad rss-counter state mm:00000000638dce24 type:MM_FILEPAGES val:33 [ 31.168656] BUG: Bad rss-counter state mm:00000000638dce24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35922' (ECDSA) to the list of known hosts. 2023/06/21 02:53:42 fuzzer started 2023/06/21 02:53:42 dialing manager at localhost:36067 2023/06/21 02:53:42 checking machine... 2023/06/21 02:53:42 checking revisions... [ 31.891713] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:53:43 testing simple program... [ 31.940395] cgroup: Unknown subsys name 'net' [ 32.000265] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:53:42 Registers: info registers vcpu 0 RAX=1ffff110011bae81 RBX=ffff888008dd73f8 RCX=1ffff11001393660 RDX=dffffc0000000000 RSI=ffff888008c7e950 RDI=ffff888008dd7428 RBP=ffff888008dd7408 RSP=ffff888016b8fa28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888008c7e780 R13=0000000000000000 R14=ffff88800d594508 R15=ffff88800d5944c0 RIP=ffffffff818476be RFL=00000016 [----AP-] 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 00007f211a1b2900 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=00007ffccc55d000 CR3=000000000e99a000 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=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=00007f281e5c2950 CR3=0000000019c78000 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=2032343a33353a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a33353a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000