[ 23.693704] BUG: Bad rss-counter state mm:000000005337a602 type:MM_FILEPAGES val:33 [ 23.695275] BUG: Bad rss-counter state mm:000000005337a602 type:MM_ANONPAGES val:22 [ 23.840216] ================================================================== [ 23.841182] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.842123] Read of size 8 at addr ffff88800b3d0b38 by task sshd/220 [ 23.842910] [ 23.843221] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.844126] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.845176] Call Trace: [ 23.845539] [ 23.845822] dump_stack_lvl+0x91/0xf0 [ 23.846321] print_report+0xcc/0x620 [ 23.846842] ? __virt_addr_valid+0x102/0x340 [ 23.847389] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.848028] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.848693] kasan_report+0xbe/0xf0 [ 23.849186] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.849816] vma_interval_tree_remove+0xc75/0xec0 [ 23.850430] vma_prepare+0xc54/0x11a0 [ 23.850924] __split_vma+0x5af/0x950 [ 23.851400] ? __pfx___split_vma+0x10/0x10 [ 23.851931] ? find_held_lock+0x2c/0x110 [ 23.852457] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.853022] ? lock_is_held_type+0x9f/0x120 [ 23.853565] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.854171] ? mtree_range_walk+0x632/0x900 [ 23.854737] ? mas_walk+0x5c7/0x7c0 [ 23.855217] do_vmi_munmap+0x1f1/0x2b0 [ 23.855715] mmap_region+0x1f9/0x2660 [ 23.856200] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.856710] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.857427] ? __pfx_lock_acquire+0x10/0x10 [ 23.857960] ? __pfx_mmap_region+0x10/0x10 [ 23.858495] ? security_mmap_addr+0x7d/0xa0 [ 23.859053] ? get_unmapped_area+0x1f5/0x3f0 [ 23.859616] do_mmap+0x854/0xf00 [ 23.860058] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.860557] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.861124] ksys_mmap_pgoff+0x3af/0x500 [ 23.861630] do_syscall_64+0x3f/0x90 [ 23.862107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.862770] RIP: 0033:0x7f952782dd82 [ 23.863224] 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 [ 23.865330] RSP: 002b:00007ffc4c428458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.866227] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f952782dd82 [ 23.867073] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9526c67000 [ 23.867902] RBP: 00007f9526c67000 R08: 0000000000000009 R09: 0000000000001000 [ 23.868749] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f3105a9ec0 [ 23.869631] R13: 00007ffc4c428470 R14: 00007ffc4c4284a0 R15: 00007ffc4c428800 [ 23.870512] [ 23.870822] [ 23.871049] Allocated by task 213: [ 23.871491] kasan_save_stack+0x22/0x50 [ 23.872014] kasan_set_track+0x25/0x30 [ 23.872522] __kasan_slab_alloc+0x59/0x70 [ 23.873058] kmem_cache_alloc+0x16b/0x370 [ 23.873596] vm_area_dup+0x20/0x160 [ 23.874063] __split_vma+0x170/0x950 [ 23.874552] split_vma+0xc6/0x110 [ 23.875023] mprotect_fixup+0x8d2/0xb30 [ 23.875540] do_mprotect_pkey+0x87e/0xd40 [ 23.876073] __x64_sys_mprotect+0x78/0xc0 [ 23.876618] do_syscall_64+0x3f/0x90 [ 23.877116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.877786] [ 23.878008] Freed by task 19: [ 23.878398] kasan_save_stack+0x22/0x50 [ 23.878922] kasan_set_track+0x25/0x30 [ 23.879431] kasan_save_free_info+0x2b/0x50 [ 23.879978] __kasan_slab_free+0x10a/0x190 [ 23.880531] kmem_cache_free+0x10d/0x4d0 [ 23.881054] rcu_core+0x8c8/0x2860 [ 23.881508] __do_softirq+0x1b7/0x7d4 [ 23.882000] [ 23.882220] Last potentially related work creation: [ 23.882832] kasan_save_stack+0x22/0x50 [ 23.883352] __kasan_record_aux_stack+0x8e/0xa0 [ 23.883945] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.884616] remove_vma+0x139/0x170 [ 23.885086] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.885675] do_vmi_munmap+0x1f1/0x2b0 [ 23.886173] __vm_munmap+0x138/0x3a0 [ 23.886654] __x64_sys_munmap+0x59/0x80 [ 23.887190] do_syscall_64+0x3f/0x90 [ 23.887687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.888360] [ 23.888578] The buggy address belongs to the object at ffff88800b3d0ae0 [ 23.888578] which belongs to the cache vm_area_struct of size 168 [ 23.890134] The buggy address is located 88 bytes inside of [ 23.890134] freed 168-byte region [ffff88800b3d0ae0, ffff88800b3d0b88) [ 23.891616] [ 23.891839] The buggy address belongs to the physical page: [ 23.892509] page:00000000f905eeff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb3d0 [ 23.893642] memcg:ffff88800d3e3f01 [ 23.894087] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.894810] page_type: 0xffffffff() [ 23.895282] raw: 0100000000000200 ffff8880087a0c80 ffffea000037d500 dead000000000005 [ 23.896238] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3e3f01 [ 23.897169] page dumped because: kasan: bad access detected [ 23.897848] [ 23.898067] Memory state around the buggy address: [ 23.898655] ffff88800b3d0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.899565] ffff88800b3d0a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 23.900456] >ffff88800b3d0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.901338] ^ [ 23.901965] ffff88800b3d0b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 23.902865] ffff88800b3d0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.903755] ================================================================== [ 23.904760] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.852190] BUG: Bad rss-counter state mm:00000000bb8b6abd type:MM_FILEPAGES val:33 [ 25.853349] BUG: Bad rss-counter state mm:00000000bb8b6abd type:MM_ANONPAGES val:22 [ 26.211736] BUG: Bad rss-counter state mm:00000000ff611b5f type:MM_FILEPAGES val:33 [ 26.212737] BUG: Bad rss-counter state mm:00000000ff611b5f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24108' (ECDSA) to the list of known hosts. 2023/06/21 03:56:02 fuzzer started 2023/06/21 03:56:02 dialing manager at localhost:36067 2023/06/21 03:56:02 checking machine... 2023/06/21 03:56:02 checking revisions... [ 26.814013] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:56:02 testing simple program... [ 26.864953] cgroup: Unknown subsys name 'net' [ 26.903127] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:56:01 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=0000000000000000 RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801479ff48 RSP=ffff88801479ff40 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801479ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450cc84 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 00007fe3e7eaf900 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=00007fc96cd1f650 CR3=000000000c694000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffd7eee49e8 CR3=0000000005482000 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=00007f637c5fb5100000563d8afc2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000