syzkaller login: [ 28.733062] BUG: Bad rss-counter state mm:000000009a5c11f4 type:MM_FILEPAGES val:33 [ 28.734083] BUG: Bad rss-counter state mm:000000009a5c11f4 type:MM_ANONPAGES val:22 [ 28.907852] ================================================================== [ 28.908763] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.909701] Read of size 8 at addr ffff88801645e5c8 by task sshd/221 [ 28.910483] [ 28.910762] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.911658] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.912655] Call Trace: [ 28.912998] [ 28.913285] dump_stack_lvl+0x91/0xf0 [ 28.913783] print_report+0xcc/0x620 [ 28.914269] ? __virt_addr_valid+0x102/0x340 [ 28.914823] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.915453] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.916101] kasan_report+0xbe/0xf0 [ 28.916579] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.917215] vma_interval_tree_remove+0xc75/0xec0 [ 28.917816] vma_prepare+0xc54/0x11a0 [ 28.918302] __split_vma+0x5af/0x950 [ 28.918786] ? __pfx___split_vma+0x10/0x10 [ 28.919316] ? find_held_lock+0x2c/0x110 [ 28.919847] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.920426] ? lock_is_held_type+0x9f/0x120 [ 28.920972] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.921581] ? mtree_range_walk+0x632/0x900 [ 28.922140] ? mas_walk+0x5c7/0x7c0 [ 28.922619] do_vmi_munmap+0x1f1/0x2b0 [ 28.923119] mmap_region+0x1f9/0x2660 [ 28.923611] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.924138] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.924872] ? __pfx_lock_acquire+0x10/0x10 [ 28.925413] ? __pfx_mmap_region+0x10/0x10 [ 28.925948] ? security_mmap_addr+0x7d/0xa0 [ 28.926490] ? get_unmapped_area+0x1f5/0x3f0 [ 28.927045] do_mmap+0x854/0xf00 [ 28.927490] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.928010] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.928578] ksys_mmap_pgoff+0x3af/0x500 [ 28.929096] do_syscall_64+0x3f/0x90 [ 28.929588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.930240] RIP: 0033:0x7f6e37e97d82 [ 28.930706] 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 [ 28.932837] RSP: 002b:00007ffe89124528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.933746] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e37e97d82 [ 28.934600] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e372d1000 [ 28.935453] RBP: 00007f6e372d1000 R08: 0000000000000009 R09: 0000000000001000 [ 28.936330] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d3c2f3f70 [ 28.937187] R13: 00007ffe89124540 R14: 00007ffe89124570 R15: 00007ffe891248d0 [ 28.938052] [ 28.938341] [ 28.938560] Allocated by task 213: [ 28.938987] kasan_save_stack+0x22/0x50 [ 28.939508] kasan_set_track+0x25/0x30 [ 28.940020] __kasan_slab_alloc+0x59/0x70 [ 28.940548] kmem_cache_alloc+0x16b/0x370 [ 28.941077] vm_area_dup+0x20/0x160 [ 28.941533] __split_vma+0x170/0x950 [ 28.942003] split_vma+0xc6/0x110 [ 28.942453] mprotect_fixup+0x8d2/0xb30 [ 28.942957] do_mprotect_pkey+0x87e/0xd40 [ 28.943495] __x64_sys_mprotect+0x78/0xc0 [ 28.944040] do_syscall_64+0x3f/0x90 [ 28.944522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.945180] [ 28.945394] Freed by task 213: [ 28.945783] kasan_save_stack+0x22/0x50 [ 28.946296] kasan_set_track+0x25/0x30 [ 28.946787] kasan_save_free_info+0x2b/0x50 [ 28.947318] __kasan_slab_free+0x10a/0x190 [ 28.947860] kmem_cache_free+0x10d/0x4d0 [ 28.948381] rcu_core+0x8c8/0x2860 [ 28.948826] __do_softirq+0x1b7/0x7d4 [ 28.949306] [ 28.949533] Last potentially related work creation: [ 28.950125] kasan_save_stack+0x22/0x50 [ 28.950632] __kasan_record_aux_stack+0x8e/0xa0 [ 28.951214] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.951884] remove_vma+0x139/0x170 [ 28.952350] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.952917] do_vmi_munmap+0x1f1/0x2b0 [ 28.953416] __vm_munmap+0x138/0x3a0 [ 28.953887] __x64_sys_munmap+0x59/0x80 [ 28.954387] do_syscall_64+0x3f/0x90 [ 28.954867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.955511] [ 28.955739] The buggy address belongs to the object at ffff88801645e570 [ 28.955739] which belongs to the cache vm_area_struct of size 168 [ 28.957222] The buggy address is located 88 bytes inside of [ 28.957222] freed 168-byte region [ffff88801645e570, ffff88801645e618) [ 28.958669] [ 28.958885] The buggy address belongs to the physical page: [ 28.959560] page:00000000a2270f13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1645e [ 28.960672] memcg:ffff888016dee901 [ 28.961097] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.961805] page_type: 0xffffffff() [ 28.962260] raw: 0100000000000200 ffff8880087a0c80 ffffea000037eec0 dead000000000007 [ 28.963188] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016dee901 [ 28.964100] page dumped because: kasan: bad access detected [ 28.964762] [ 28.964975] Memory state around the buggy address: [ 28.965564] ffff88801645e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.966426] ffff88801645e500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 28.967278] >ffff88801645e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.968161] ^ [ 28.968826] ffff88801645e600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.969688] ffff88801645e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.970539] ================================================================== [ 28.971507] Disabling lock debugging due to kernel taint [ 31.197393] BUG: Bad rss-counter state mm:00000000f3f90037 type:MM_FILEPAGES val:33 [ 31.198382] BUG: Bad rss-counter state mm:00000000f3f90037 type:MM_ANONPAGES val:22 [ 31.686303] BUG: Bad rss-counter state mm:0000000087d7f6fa type:MM_FILEPAGES val:33 [ 31.687520] BUG: Bad rss-counter state mm:0000000087d7f6fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53659' (ECDSA) to the list of known hosts. 2023/06/20 16:52:21 fuzzer started 2023/06/20 16:52:22 dialing manager at localhost:36067 2023/06/20 16:52:22 checking machine... 2023/06/20 16:52:22 checking revisions... [ 32.490157] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:52:22 testing simple program... [ 32.534436] cgroup: Unknown subsys name 'net' [ 32.571285] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:52:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000031 RCX=0000000000000000 RDX=ffff88800f171b40 RSI=ffffffff81f57e60 RDI=0000000000000001 RBP=ffff88800f3d7000 RSP=ffff88800f8ffa70 R8 =0000000000000001 R9 =0000000000000002 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88801002c0d8 R13=ffff88800996b980 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c089b 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 00007f964b539900 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=00007f964baf10b0 CR3=000000000ebda000 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=2031323a32353a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a32353a3631203032 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007fcd6c09c0a0 CR3=000000000ccd0000 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=c1f845accc348a8e3340e266e59ea3ab XMM02=2c67c8bc2e329bc3000000000011fc40 XMM03=fb795ef6d65770560000000000122580 XMM04=f8f3f10df4642a8800000000000ae988 XMM05=e4cb8bb95a7664b60000000000132c30 XMM06=c291bd5c70af25b90000000000132ab8 XMM07=e042d86d42eb936e0000000000122800 XMM08=6cb9586d7251acd5000000000011fca0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000