[ 23.843499] BUG: Bad rss-counter state mm:00000000b8b6107a type:MM_FILEPAGES val:33 [ 23.844779] BUG: Bad rss-counter state mm:00000000b8b6107a type:MM_ANONPAGES val:22 [ 23.884476] ================================================================== [ 23.885384] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.886360] Read of size 8 at addr ffff88800d701d08 by task sshd/219 [ 23.887134] [ 23.887356] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.888415] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.889389] Call Trace: [ 23.889715] [ 23.890010] dump_stack_lvl+0x91/0xf0 [ 23.890548] print_report+0xcc/0x620 [ 23.891036] ? __virt_addr_valid+0x102/0x340 [ 23.891588] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.892212] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.892835] kasan_report+0xbe/0xf0 [ 23.893317] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.893941] vma_interval_tree_remove+0xc75/0xec0 [ 23.894571] vma_prepare+0xc54/0x11a0 [ 23.895052] __split_vma+0x5af/0x950 [ 23.895538] ? __pfx___split_vma+0x10/0x10 [ 23.896087] ? find_held_lock+0x2c/0x110 [ 23.896612] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.897182] ? lock_is_held_type+0x9f/0x120 [ 23.897729] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.898350] ? mtree_range_walk+0x632/0x900 [ 23.898911] ? mas_walk+0x5c7/0x7c0 [ 23.899388] do_vmi_munmap+0x1f1/0x2b0 [ 23.899891] mmap_region+0x1f9/0x2660 [ 23.900371] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.900885] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.901611] ? __pfx_lock_acquire+0x10/0x10 [ 23.902147] ? __pfx_mmap_region+0x10/0x10 [ 23.902685] ? security_mmap_addr+0x7d/0xa0 [ 23.903220] ? get_unmapped_area+0x1f5/0x3f0 [ 23.903774] do_mmap+0x854/0xf00 [ 23.904221] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.904721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.905289] ksys_mmap_pgoff+0x3af/0x500 [ 23.905800] do_syscall_64+0x3f/0x90 [ 23.906299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.906944] RIP: 0033:0x7fd2d9b12d82 [ 23.907408] 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 [ 23.909531] RSP: 002b:00007ffe6d88be78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.910448] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd2d9b12d82 [ 23.911291] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd2d8f4c000 [ 23.912146] RBP: 00007fd2d8f4c000 R08: 0000000000000009 R09: 0000000000001000 [ 23.912991] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8c1c1ff70 [ 23.913841] R13: 00007ffe6d88be90 R14: 00007ffe6d88bec0 R15: 00007ffe6d88c220 [ 23.914716] [ 23.915013] [ 23.915229] Allocated by task 212: [ 23.915658] kasan_save_stack+0x22/0x50 [ 23.916164] kasan_set_track+0x25/0x30 [ 23.916658] __kasan_slab_alloc+0x59/0x70 [ 23.917188] kmem_cache_alloc+0x16b/0x370 [ 23.917705] vm_area_dup+0x20/0x160 [ 23.918174] __split_vma+0x170/0x950 [ 23.918638] split_vma+0xc6/0x110 [ 23.919084] mprotect_fixup+0x8d2/0xb30 [ 23.919590] do_mprotect_pkey+0x87e/0xd40 [ 23.920114] __x64_sys_mprotect+0x78/0xc0 [ 23.920634] do_syscall_64+0x3f/0x90 [ 23.921109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.921758] [ 23.921973] Freed by task 212: [ 23.922385] kasan_save_stack+0x22/0x50 [ 23.922894] kasan_set_track+0x25/0x30 [ 23.923385] kasan_save_free_info+0x2b/0x50 [ 23.923919] __kasan_slab_free+0x10a/0x190 [ 23.924448] kmem_cache_free+0x10d/0x4d0 [ 23.924957] rcu_core+0x8c8/0x2860 [ 23.925399] __do_softirq+0x1b7/0x7d4 [ 23.925874] [ 23.926094] Last potentially related work creation: [ 23.926693] kasan_save_stack+0x22/0x50 [ 23.927200] __kasan_record_aux_stack+0x8e/0xa0 [ 23.927771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.928478] remove_vma+0x139/0x170 [ 23.928929] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.929487] do_vmi_munmap+0x1f1/0x2b0 [ 23.929973] __vm_munmap+0x138/0x3a0 [ 23.930462] __x64_sys_munmap+0x59/0x80 [ 23.930965] do_syscall_64+0x3f/0x90 [ 23.931438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.932075] [ 23.932289] Second to last potentially related work creation: [ 23.932975] kasan_save_stack+0x22/0x50 [ 23.933481] __kasan_record_aux_stack+0x8e/0xa0 [ 23.934118] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.934817] remove_vma+0x139/0x170 [ 23.935268] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.935827] do_vmi_munmap+0x1f1/0x2b0 [ 23.936316] mmap_region+0x1f9/0x2660 [ 23.936806] do_mmap+0x854/0xf00 [ 23.937235] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.937723] ksys_mmap_pgoff+0x3af/0x500 [ 23.938244] do_syscall_64+0x3f/0x90 [ 23.938727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.939379] [ 23.939597] The buggy address belongs to the object at ffff88800d701cb0 [ 23.939597] which belongs to the cache vm_area_struct of size 168 [ 23.941094] The buggy address is located 88 bytes inside of [ 23.941094] freed 168-byte region [ffff88800d701cb0, ffff88800d701d58) [ 23.942519] [ 23.942737] The buggy address belongs to the physical page: [ 23.943401] page:00000000e01e71b7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd701 [ 23.944501] memcg:ffff88800e079d01 [ 23.944932] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.945570] page_type: 0xffffffff() [ 23.946019] raw: 0100000000000200 ffff8880087a0c80 ffffea000038c180 dead000000000006 [ 23.946973] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e079d01 [ 23.947892] page dumped because: kasan: bad access detected [ 23.948559] [ 23.948776] Memory state around the buggy address: [ 23.949356] ffff88800d701c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.950220] ffff88800d701c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 23.951083] >ffff88800d701d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 23.951922] ^ [ 23.952361] ffff88800d701d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 23.953209] ffff88800d701e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 23.954058] ================================================================== [ 23.955152] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.787324] BUG: Bad rss-counter state mm:0000000008ab2f2f type:MM_FILEPAGES val:33 [ 25.788502] BUG: Bad rss-counter state mm:0000000008ab2f2f type:MM_ANONPAGES val:22 [ 26.267250] BUG: Bad rss-counter state mm:00000000245857f9 type:MM_FILEPAGES val:33 [ 26.268440] BUG: Bad rss-counter state mm:00000000245857f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9498' (ECDSA) to the list of known hosts. 2023/06/20 14:47:36 fuzzer started 2023/06/20 14:47:37 dialing manager at localhost:36067 2023/06/20 14:47:37 checking machine... 2023/06/20 14:47:37 checking revisions... [ 26.991148] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:47:37 testing simple program... [ 27.037184] cgroup: Unknown subsys name 'net' [ 27.088054] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:47:36 Registers: info registers vcpu 0 RAX=1ffff1100354b2f7 RBX=ffff88801aa59788 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801aa597b8 RBP=ffff88801923b480 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888019239500 R14=ffffffff818d9c06 R15=ffff88800c58de80 RIP=ffffffff818464e2 RFL=00000046 [---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 00007f0fde815900 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=000055dc0ee0a818 CR3=0000000017e42000 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=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=00007ffc1b7a2438 CR3=000000000c5b6000 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=2036333a37343a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a37343a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000