syzkaller login: [ 38.753471] BUG: Bad rss-counter state mm:00000000b51e606a type:MM_FILEPAGES val:33 [ 38.754656] BUG: Bad rss-counter state mm:00000000b51e606a type:MM_ANONPAGES val:22 [ 38.892041] ================================================================== [ 38.892965] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.893907] Read of size 8 at addr ffff88800dab5228 by task sshd/221 [ 38.894667] [ 38.894887] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.895888] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.896873] Call Trace: [ 38.897191] [ 38.897491] dump_stack_lvl+0x91/0xf0 [ 38.897987] print_report+0xcc/0x620 [ 38.898487] ? __virt_addr_valid+0x102/0x340 [ 38.899044] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899680] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.900310] kasan_report+0xbe/0xf0 [ 38.900789] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.901402] vma_interval_tree_remove+0xc75/0xec0 [ 38.902004] vma_prepare+0xc54/0x11a0 [ 38.902489] __split_vma+0x5af/0x950 [ 38.902957] ? __pfx___split_vma+0x10/0x10 [ 38.903506] ? find_held_lock+0x2c/0x110 [ 38.904028] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.904589] ? lock_is_held_type+0x9f/0x120 [ 38.905124] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.905735] ? mtree_range_walk+0x632/0x900 [ 38.906284] ? mas_walk+0x5c7/0x7c0 [ 38.906760] do_vmi_munmap+0x1f1/0x2b0 [ 38.907274] mmap_region+0x1f9/0x2660 [ 38.907755] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.908269] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.908984] ? __pfx_lock_acquire+0x10/0x10 [ 38.909510] ? __pfx_mmap_region+0x10/0x10 [ 38.910041] ? security_mmap_addr+0x7d/0xa0 [ 38.910568] ? get_unmapped_area+0x1f5/0x3f0 [ 38.911128] do_mmap+0x854/0xf00 [ 38.911568] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.912063] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.912625] ksys_mmap_pgoff+0x3af/0x500 [ 38.913136] do_syscall_64+0x3f/0x90 [ 38.913615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.914261] RIP: 0033:0x7fd44a81ad82 [ 38.914720] 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 [ 38.916848] RSP: 002b:00007ffef4b84b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.917753] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd44a81ad82 [ 38.918601] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd449c54000 [ 38.919462] RBP: 00007fd449c54000 R08: 0000000000000009 R09: 0000000000001000 [ 38.920305] R10: 0000000000000812 R11: 0000000000000206 R12: 000055811a76aec0 [ 38.921166] R13: 00007ffef4b84b40 R14: 00007ffef4b84b70 R15: 00007ffef4b84ed0 [ 38.922031] [ 38.922322] [ 38.922533] Allocated by task 214: [ 38.922955] kasan_save_stack+0x22/0x50 [ 38.923473] kasan_set_track+0x25/0x30 [ 38.923970] __kasan_slab_alloc+0x59/0x70 [ 38.924501] kmem_cache_alloc+0x16b/0x370 [ 38.925022] vm_area_dup+0x20/0x160 [ 38.925475] __split_vma+0x170/0x950 [ 38.925940] split_vma+0xc6/0x110 [ 38.926384] mprotect_fixup+0x8d2/0xb30 [ 38.926883] do_mprotect_pkey+0x87e/0xd40 [ 38.927418] __x64_sys_mprotect+0x78/0xc0 [ 38.927935] do_syscall_64+0x3f/0x90 [ 38.928424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.929072] [ 38.929289] Freed by task 214: [ 38.929681] kasan_save_stack+0x22/0x50 [ 38.930182] kasan_set_track+0x25/0x30 [ 38.930680] kasan_save_free_info+0x2b/0x50 [ 38.931226] __kasan_slab_free+0x10a/0x190 [ 38.931770] kmem_cache_free+0x10d/0x4d0 [ 38.932279] rcu_core+0x8c8/0x2860 [ 38.932723] __do_softirq+0x1b7/0x7d4 [ 38.933203] [ 38.933419] Last potentially related work creation: [ 38.934010] kasan_save_stack+0x22/0x50 [ 38.934513] __kasan_record_aux_stack+0x8e/0xa0 [ 38.935097] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.935744] remove_vma+0x139/0x170 [ 38.936204] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.936765] do_vmi_munmap+0x1f1/0x2b0 [ 38.937255] __vm_munmap+0x138/0x3a0 [ 38.937726] __x64_sys_munmap+0x59/0x80 [ 38.938232] do_syscall_64+0x3f/0x90 [ 38.938705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.939370] [ 38.939591] Second to last potentially related work creation: [ 38.940281] kasan_save_stack+0x22/0x50 [ 38.940784] __kasan_record_aux_stack+0x8e/0xa0 [ 38.941358] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.942004] remove_vma+0x139/0x170 [ 38.942455] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.943013] do_vmi_munmap+0x1f1/0x2b0 [ 38.943520] mmap_region+0x1f9/0x2660 [ 38.943998] do_mmap+0x854/0xf00 [ 38.944440] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.944932] ksys_mmap_pgoff+0x3af/0x500 [ 38.945430] do_syscall_64+0x3f/0x90 [ 38.945904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.946564] [ 38.946778] The buggy address belongs to the object at ffff88800dab51d0 [ 38.946778] which belongs to the cache vm_area_struct of size 168 [ 38.948260] The buggy address is located 88 bytes inside of [ 38.948260] freed 168-byte region [ffff88800dab51d0, ffff88800dab5278) [ 38.949664] [ 38.949878] The buggy address belongs to the physical page: [ 38.950535] page:00000000fc4545c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdab5 [ 38.951661] memcg:ffff8880140f1301 [ 38.952089] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.952803] page_type: 0xffffffff() [ 38.953258] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a4880 dead00000000000b [ 38.954172] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880140f1301 [ 38.955091] page dumped because: kasan: bad access detected [ 38.955762] [ 38.955979] Memory state around the buggy address: [ 38.956559] ffff88800dab5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.957420] ffff88800dab5180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.958277] >ffff88800dab5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.959143] ^ [ 38.959696] ffff88800dab5280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.960570] ffff88800dab5300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.961430] ================================================================== [ 38.962406] Disabling lock debugging due to kernel taint [ 40.883827] BUG: Bad rss-counter state mm:000000003c388d15 type:MM_FILEPAGES val:33 [ 40.884788] BUG: Bad rss-counter state mm:000000003c388d15 type:MM_ANONPAGES val:22 [ 41.347554] BUG: Bad rss-counter state mm:00000000449c5f79 type:MM_FILEPAGES val:33 [ 41.348748] BUG: Bad rss-counter state mm:00000000449c5f79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46903' (ECDSA) to the list of known hosts. 2023/06/20 21:20:39 fuzzer started 2023/06/20 21:20:39 dialing manager at localhost:36067 2023/06/20 21:20:39 checking machine... 2023/06/20 21:20:39 checking revisions... [ 42.120384] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:20:40 testing simple program... [ 42.178585] cgroup: Unknown subsys name 'net' [ 42.221982] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:20:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000004000 RCX=0000000000000000 RDX=ffff8880142bb680 RSI=ffffffff81390a3a RDI=0000000000000001 RBP=ffff8880142bb680 RSP=ffff88801584ff00 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88801584ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff810ad536 RFL=00000002 [-------] 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 00007f214ef6d900 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=0000555e0cabc768 CR3=0000000008cc0000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88800e22d1c0 RSI=0000000000000002 RDI=ffff88800fce28c0 RBP=ffff88800fce28c0 RSP=ffff888018daf990 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff83c208fc R13=ffff88800e2cc500 R14=ffff888018dafa88 R15=ffff88800fce28c0 RIP=ffffffff83674f42 RFL=00000293 [--S-A-C] 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 00007fbe91d3f700 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=00007ffef455db78 CR3=000000000d8a6000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32323639332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323236 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000