syzkaller login: [ 31.179030] BUG: Bad rss-counter state mm:0000000013ee04a5 type:MM_FILEPAGES val:33 [ 31.180284] BUG: Bad rss-counter state mm:0000000013ee04a5 type:MM_ANONPAGES val:22 [ 31.330566] ================================================================== [ 31.331639] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.332762] Read of size 8 at addr ffff8880182bed08 by task sshd/224 [ 31.333776] [ 31.333997] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.334870] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.335885] Call Trace: [ 31.336205] [ 31.336492] dump_stack_lvl+0x91/0xf0 [ 31.336988] print_report+0xcc/0x620 [ 31.337472] ? __virt_addr_valid+0x102/0x340 [ 31.338035] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.338656] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.339275] kasan_report+0xbe/0xf0 [ 31.339765] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.340395] vma_interval_tree_remove+0xc75/0xec0 [ 31.341004] vma_prepare+0xc54/0x11a0 [ 31.341492] __split_vma+0x5af/0x950 [ 31.342001] ? __pfx___split_vma+0x10/0x10 [ 31.342533] ? find_held_lock+0x2c/0x110 [ 31.343061] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.343637] ? lock_is_held_type+0x9f/0x120 [ 31.344187] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.344808] ? mtree_range_walk+0x632/0x900 [ 31.345373] ? mas_walk+0x5c7/0x7c0 [ 31.345861] do_vmi_munmap+0x1f1/0x2b0 [ 31.346358] mmap_region+0x1f9/0x2660 [ 31.346848] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.347365] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.348087] ? __pfx_lock_acquire+0x10/0x10 [ 31.348622] ? __pfx_mmap_region+0x10/0x10 [ 31.349159] ? security_mmap_addr+0x7d/0xa0 [ 31.349709] ? get_unmapped_area+0x1f5/0x3f0 [ 31.350268] do_mmap+0x854/0xf00 [ 31.350714] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.351222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.351791] ksys_mmap_pgoff+0x3af/0x500 [ 31.352300] do_syscall_64+0x3f/0x90 [ 31.352779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.353430] RIP: 0033:0x7f01517cad82 [ 31.353901] 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 [ 31.356052] RSP: 002b:00007ffe43e64648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.356966] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01517cad82 [ 31.357841] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0150c04000 [ 31.358702] RBP: 00007f0150c04000 R08: 0000000000000009 R09: 0000000000001000 [ 31.359556] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9f6a60b20 [ 31.360409] R13: 00007ffe43e64660 R14: 00007ffe43e64690 R15: 00007ffe43e649f0 [ 31.361281] [ 31.361572] [ 31.361824] Allocated by task 217: [ 31.362257] kasan_save_stack+0x22/0x50 [ 31.362767] kasan_set_track+0x25/0x30 [ 31.363265] __kasan_slab_alloc+0x59/0x70 [ 31.363795] kmem_cache_alloc+0x16b/0x370 [ 31.364313] vm_area_dup+0x20/0x160 [ 31.364768] __split_vma+0x170/0x950 [ 31.365239] split_vma+0xc6/0x110 [ 31.365682] mprotect_fixup+0x8d2/0xb30 [ 31.366206] do_mprotect_pkey+0x87e/0xd40 [ 31.366731] __x64_sys_mprotect+0x78/0xc0 [ 31.367255] do_syscall_64+0x3f/0x90 [ 31.367730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.368379] [ 31.368596] Freed by task 217: [ 31.368992] kasan_save_stack+0x22/0x50 [ 31.369500] kasan_set_track+0x25/0x30 [ 31.370017] kasan_save_free_info+0x2b/0x50 [ 31.370555] __kasan_slab_free+0x10a/0x190 [ 31.371093] kmem_cache_free+0x10d/0x4d0 [ 31.371604] rcu_core+0x8c8/0x2860 [ 31.372048] __do_softirq+0x1b7/0x7d4 [ 31.372529] [ 31.372744] Last potentially related work creation: [ 31.373340] kasan_save_stack+0x22/0x50 [ 31.373865] __kasan_record_aux_stack+0x8e/0xa0 [ 31.374440] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.375096] remove_vma+0x139/0x170 [ 31.375552] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.376118] do_vmi_munmap+0x1f1/0x2b0 [ 31.376606] __vm_munmap+0x138/0x3a0 [ 31.377077] __x64_sys_munmap+0x59/0x80 [ 31.377582] do_syscall_64+0x3f/0x90 [ 31.378071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.378736] [ 31.378955] The buggy address belongs to the object at ffff8880182becb0 [ 31.378955] which belongs to the cache vm_area_struct of size 168 [ 31.380468] The buggy address is located 88 bytes inside of [ 31.380468] freed 168-byte region [ffff8880182becb0, ffff8880182bed58) [ 31.381929] [ 31.382154] The buggy address belongs to the physical page: [ 31.382836] page:00000000a21322a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182be [ 31.383937] memcg:ffff88800cbd0701 [ 31.384371] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.385016] page_type: 0xffffffff() [ 31.385473] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.386442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbd0701 [ 31.387372] page dumped because: kasan: bad access detected [ 31.388044] [ 31.388272] Memory state around the buggy address: [ 31.388861] ffff8880182bec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.389745] ffff8880182bec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.390613] >ffff8880182bed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.391494] ^ [ 31.391946] ffff8880182bed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.392814] ffff8880182bee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.393680] ================================================================== [ 31.394671] Disabling lock debugging due to kernel taint [ 33.444029] BUG: Bad rss-counter state mm:000000002a953533 type:MM_FILEPAGES val:33 [ 33.445330] BUG: Bad rss-counter state mm:000000002a953533 type:MM_ANONPAGES val:22 [ 33.899330] BUG: Bad rss-counter state mm:000000001894be8c type:MM_FILEPAGES val:33 [ 33.900298] BUG: Bad rss-counter state mm:000000001894be8c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8804' (ECDSA) to the list of known hosts. 2023/06/20 21:18:17 fuzzer started 2023/06/20 21:18:17 dialing manager at localhost:36067 2023/06/20 21:18:17 checking machine... 2023/06/20 21:18:17 checking revisions... [ 34.654630] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:18:18 testing simple program... [ 34.697400] cgroup: Unknown subsys name 'net' [ 34.753525] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:18:17 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000a728ac69 RCX=ffff88806c856348 RDX=000000000000000d RSI=0000000000000002 RDI=00000000c38cd755 RBP=ffff88800ff41d40 RSP=ffff888014697718 R8 =000000004be98158 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff888014697780 R15=000000000000000d RIP=ffffffff822704d3 RFL=00000206 [-----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 00007f58697bf900 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=000055ed22054748 CR3=000000000d89c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b0055539b28e0fc800000000000ae988 XMM05=007296d52a40ecbd0000000000132190 XMM06=83594ee05b8d38950000000000130f88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fff04d1a398 CR3=000000000c600000 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=2037313a38313a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3333 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3333325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a38313a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000