[ 30.604495] BUG: Bad rss-counter state mm:00000000a2a9127e type:MM_FILEPAGES val:33 [ 30.605983] BUG: Bad rss-counter state mm:00000000a2a9127e type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.765351] ================================================================== [ 30.766267] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.767233] Read of size 8 at addr ffff8880069344e0 by task sshd/219 [ 30.768107] [ 30.768333] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.769210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.770209] Call Trace: [ 30.770546] [ 30.770853] dump_stack_lvl+0x91/0xf0 [ 30.771354] print_report+0xcc/0x620 [ 30.771841] ? __virt_addr_valid+0x102/0x340 [ 30.772408] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773043] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773675] kasan_report+0xbe/0xf0 [ 30.774155] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774826] vma_interval_tree_remove+0xc75/0xec0 [ 30.775428] vma_prepare+0xc54/0x11a0 [ 30.775913] __split_vma+0x5af/0x950 [ 30.776391] ? __pfx___split_vma+0x10/0x10 [ 30.776932] ? find_held_lock+0x2c/0x110 [ 30.777461] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.778040] ? lock_is_held_type+0x9f/0x120 [ 30.778592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.779221] ? mtree_range_walk+0x632/0x900 [ 30.779787] ? mas_walk+0x5c7/0x7c0 [ 30.780270] do_vmi_munmap+0x1f1/0x2b0 [ 30.780765] mmap_region+0x1f9/0x2660 [ 30.781251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.781765] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.782491] ? __pfx_lock_acquire+0x10/0x10 [ 30.783066] ? __pfx_mmap_region+0x10/0x10 [ 30.783601] ? security_mmap_addr+0x7d/0xa0 [ 30.784142] ? get_unmapped_area+0x1f5/0x3f0 [ 30.784698] do_mmap+0x854/0xf00 [ 30.785148] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.785642] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.786213] ksys_mmap_pgoff+0x3af/0x500 [ 30.786732] do_syscall_64+0x3f/0x90 [ 30.787218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787884] RIP: 0033:0x7f4fbca4cd82 [ 30.788342] 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 [ 30.790486] RSP: 002b:00007ffea258eb08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.791405] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4fbca4cd82 [ 30.792257] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4fbbe86000 [ 30.793105] RBP: 00007f4fbbe86000 R08: 0000000000000009 R09: 0000000000001000 [ 30.793959] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e030c9eec0 [ 30.794821] R13: 00007ffea258eb20 R14: 00007ffea258eb50 R15: 00007ffea258eeb0 [ 30.795686] [ 30.795983] [ 30.796205] Allocated by task 212: [ 30.796640] kasan_save_stack+0x22/0x50 [ 30.797153] kasan_set_track+0x25/0x30 [ 30.797646] __kasan_slab_alloc+0x59/0x70 [ 30.798181] kmem_cache_alloc+0x16b/0x370 [ 30.798712] vm_area_dup+0x20/0x160 [ 30.799171] __split_vma+0x170/0x950 [ 30.799648] split_vma+0xc6/0x110 [ 30.800101] mprotect_fixup+0x8d2/0xb30 [ 30.800606] do_mprotect_pkey+0x87e/0xd40 [ 30.801125] __x64_sys_mprotect+0x78/0xc0 [ 30.801654] do_syscall_64+0x3f/0x90 [ 30.802132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802793] [ 30.803016] Freed by task 212: [ 30.803408] kasan_save_stack+0x22/0x50 [ 30.803915] kasan_set_track+0x25/0x30 [ 30.804412] kasan_save_free_info+0x2b/0x50 [ 30.804952] __kasan_slab_free+0x10a/0x190 [ 30.805489] kmem_cache_free+0x10d/0x4d0 [ 30.805998] rcu_core+0x8c8/0x2860 [ 30.806446] __do_softirq+0x1b7/0x7d4 [ 30.806948] [ 30.807169] Last potentially related work creation: [ 30.807759] kasan_save_stack+0x22/0x50 [ 30.808267] __kasan_record_aux_stack+0x8e/0xa0 [ 30.808842] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.809482] remove_vma+0x139/0x170 [ 30.809948] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.810507] do_vmi_munmap+0x1f1/0x2b0 [ 30.811000] __vm_munmap+0x138/0x3a0 [ 30.811471] __x64_sys_munmap+0x59/0x80 [ 30.811969] do_syscall_64+0x3f/0x90 [ 30.812455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813103] [ 30.813317] Second to last potentially related work creation: [ 30.814012] kasan_save_stack+0x22/0x50 [ 30.814517] __kasan_record_aux_stack+0x8e/0xa0 [ 30.815119] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.815763] remove_vma+0x139/0x170 [ 30.816230] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.816794] do_vmi_munmap+0x1f1/0x2b0 [ 30.817286] mmap_region+0x1f9/0x2660 [ 30.817764] do_mmap+0x854/0xf00 [ 30.818201] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.818706] ksys_mmap_pgoff+0x3af/0x500 [ 30.819211] do_syscall_64+0x3f/0x90 [ 30.819689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.820341] [ 30.820563] The buggy address belongs to the object at ffff888006934488 [ 30.820563] which belongs to the cache vm_area_struct of size 168 [ 30.822057] The buggy address is located 88 bytes inside of [ 30.822057] freed 168-byte region [ffff888006934488, ffff888006934530) [ 30.823485] [ 30.823702] The buggy address belongs to the physical page: [ 30.824377] page:000000002ca6833b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6934 [ 30.825461] memcg:ffff88800f36c101 [ 30.825893] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.826547] page_type: 0xffffffff() [ 30.827017] raw: 0100000000000200 ffff8880087a0c80 ffffea00001a4a00 dead000000000002 [ 30.827941] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f36c101 [ 30.828851] page dumped because: kasan: bad access detected [ 30.829521] [ 30.829740] Memory state around the buggy address: [ 30.830327] ffff888006934380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.831190] ffff888006934400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.832065] >ffff888006934480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.832929] ^ [ 30.833692] ffff888006934500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.834559] ffff888006934580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.835435] ================================================================== [ 30.836432] Disabling lock debugging due to kernel taint [ 33.560873] BUG: Bad rss-counter state mm:00000000d8cd9352 type:MM_FILEPAGES val:33 [ 33.561882] BUG: Bad rss-counter state mm:00000000d8cd9352 type:MM_ANONPAGES val:22 [ 34.058666] BUG: Bad rss-counter state mm:00000000d7701708 type:MM_FILEPAGES val:33 [ 34.059909] BUG: Bad rss-counter state mm:00000000d7701708 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59364' (ECDSA) to the list of known hosts. 2023/06/20 18:12:58 fuzzer started 2023/06/20 18:12:58 dialing manager at localhost:36067 2023/06/20 18:12:58 checking machine... 2023/06/20 18:12:58 checking revisions... [ 34.756500] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:12:58 testing simple program... [ 34.803970] cgroup: Unknown subsys name 'net' [ 34.853413] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:12:58 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=0000560478885e58 CR3=000000000eb0a000 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=2038353a32313a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a32313a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888015f57c90 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888019a5a398 R13=ffffffff818cf6e0 R14=ffff888019a5a338 R15=0000000000480040 RIP=ffffffff8180f189 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 00007f406e9a5900 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=00007ffda03a0000 CR3=000000001a3f8000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000