[ 31.930758] BUG: Bad rss-counter state mm:0000000068f64263 type:MM_FILEPAGES val:33 [ 31.932024] BUG: Bad rss-counter state mm:0000000068f64263 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.067286] ================================================================== [ 32.068421] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.069369] Read of size 8 at addr ffff88800dd94798 by task sshd/220 [ 32.070257] [ 32.070478] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.071362] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.072379] Call Trace: [ 32.072705] [ 32.072997] dump_stack_lvl+0x91/0xf0 [ 32.073491] print_report+0xcc/0x620 [ 32.073981] ? __virt_addr_valid+0x102/0x340 [ 32.074544] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.075182] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.075828] kasan_report+0xbe/0xf0 [ 32.076304] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.076931] vma_interval_tree_remove+0xc75/0xec0 [ 32.077540] vma_prepare+0xc54/0x11a0 [ 32.078034] __split_vma+0x5af/0x950 [ 32.078520] ? __pfx___split_vma+0x10/0x10 [ 32.079058] ? find_held_lock+0x2c/0x110 [ 32.079592] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.080191] ? lock_is_held_type+0x9f/0x120 [ 32.080737] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.081360] ? mtree_range_walk+0x632/0x900 [ 32.081913] ? mas_walk+0x5c7/0x7c0 [ 32.082393] do_vmi_munmap+0x1f1/0x2b0 [ 32.082898] mmap_region+0x1f9/0x2660 [ 32.083388] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.083916] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.084655] ? __pfx_lock_acquire+0x10/0x10 [ 32.085197] ? __pfx_mmap_region+0x10/0x10 [ 32.085747] ? security_mmap_addr+0x7d/0xa0 [ 32.086292] ? get_unmapped_area+0x1f5/0x3f0 [ 32.086867] do_mmap+0x854/0xf00 [ 32.087307] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.087825] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.088395] ksys_mmap_pgoff+0x3af/0x500 [ 32.088918] do_syscall_64+0x3f/0x90 [ 32.089399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.090052] RIP: 0033:0x7f8fbae26d82 [ 32.090511] 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 [ 32.092708] RSP: 002b:00007ffc61b1ac68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.093627] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8fbae26d82 [ 32.094480] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8fba260000 [ 32.095351] RBP: 00007f8fba260000 R08: 0000000000000009 R09: 0000000000001000 [ 32.096217] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561643188ec0 [ 32.097088] R13: 00007ffc61b1ac80 R14: 00007ffc61b1acb0 R15: 00007ffc61b1b010 [ 32.097962] [ 32.098254] [ 32.098473] Allocated by task 213: [ 32.098919] kasan_save_stack+0x22/0x50 [ 32.099433] kasan_set_track+0x25/0x30 [ 32.099940] __kasan_slab_alloc+0x59/0x70 [ 32.100479] kmem_cache_alloc+0x16b/0x370 [ 32.101012] vm_area_dup+0x20/0x160 [ 32.101476] __split_vma+0x170/0x950 [ 32.101939] split_vma+0xc6/0x110 [ 32.102384] mprotect_fixup+0x8d2/0xb30 [ 32.102889] do_mprotect_pkey+0x87e/0xd40 [ 32.103413] __x64_sys_mprotect+0x78/0xc0 [ 32.103959] do_syscall_64+0x3f/0x90 [ 32.104439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.105084] [ 32.105303] Freed by task 213: [ 32.105700] kasan_save_stack+0x22/0x50 [ 32.106208] kasan_set_track+0x25/0x30 [ 32.106702] kasan_save_free_info+0x2b/0x50 [ 32.107235] __kasan_slab_free+0x10a/0x190 [ 32.107775] kmem_cache_free+0x10d/0x4d0 [ 32.108283] rcu_core+0x8c8/0x2860 [ 32.108730] __do_softirq+0x1b7/0x7d4 [ 32.109207] [ 32.109423] Last potentially related work creation: [ 32.110025] kasan_save_stack+0x22/0x50 [ 32.110535] __kasan_record_aux_stack+0x8e/0xa0 [ 32.111119] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.111792] remove_vma+0x139/0x170 [ 32.112251] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.112810] do_vmi_munmap+0x1f1/0x2b0 [ 32.113301] __vm_munmap+0x138/0x3a0 [ 32.113779] __x64_sys_munmap+0x59/0x80 [ 32.114286] do_syscall_64+0x3f/0x90 [ 32.114771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.115426] [ 32.115641] Second to last potentially related work creation: [ 32.116357] kasan_save_stack+0x22/0x50 [ 32.116862] __kasan_record_aux_stack+0x8e/0xa0 [ 32.117440] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.118096] remove_vma+0x139/0x170 [ 32.118550] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.119127] do_vmi_munmap+0x1f1/0x2b0 [ 32.119621] mmap_region+0x1f9/0x2660 [ 32.120104] do_mmap+0x854/0xf00 [ 32.120541] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.121030] ksys_mmap_pgoff+0x3af/0x500 [ 32.121539] do_syscall_64+0x3f/0x90 [ 32.122012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.122654] [ 32.122868] The buggy address belongs to the object at ffff88800dd94740 [ 32.122868] which belongs to the cache vm_area_struct of size 168 [ 32.124380] The buggy address is located 88 bytes inside of [ 32.124380] freed 168-byte region [ffff88800dd94740, ffff88800dd947e8) [ 32.125810] [ 32.126028] The buggy address belongs to the physical page: [ 32.126715] page:000000002af0af23 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd94 [ 32.127810] memcg:ffff88800dff1201 [ 32.128241] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.128885] page_type: 0xffffffff() [ 32.129341] raw: 0100000000000200 ffff88800879fc80 ffffea00003af580 dead000000000002 [ 32.130271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dff1201 [ 32.131189] page dumped because: kasan: bad access detected [ 32.131859] [ 32.132077] Memory state around the buggy address: [ 32.132660] ffff88800dd94680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.133513] ffff88800dd94700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.134362] >ffff88800dd94780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.135211] ^ [ 32.135701] ffff88800dd94800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.136584] ffff88800dd94880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.137443] ================================================================== [ 32.138563] Disabling lock debugging due to kernel taint [ 34.008312] BUG: Bad rss-counter state mm:0000000056319683 type:MM_FILEPAGES val:33 [ 34.009086] BUG: Bad rss-counter state mm:0000000056319683 type:MM_ANONPAGES val:22 [ 34.434971] BUG: Bad rss-counter state mm:0000000062ff5745 type:MM_FILEPAGES val:33 [ 34.436046] BUG: Bad rss-counter state mm:0000000062ff5745 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29450' (ECDSA) to the list of known hosts. 2023/06/20 03:46:23 fuzzer started 2023/06/20 03:46:23 dialing manager at localhost:44161 2023/06/20 03:46:23 checking machine... 2023/06/20 03:46:23 checking revisions... [ 35.169516] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:46:23 testing simple program... [ 35.222315] cgroup: Unknown subsys name 'net' [ 35.305518] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:46:22 Registers: info registers vcpu 0 RAX=1ffff11001f7eed2 RBX=ffff88800fbf76e0 RCX=ffff88800fbf76e8 RDX=ffff88800fbf8000 RSI=1ffff11001f7eecb RDI=ffff88800fbf7648 RBP=dffffc0000000000 RSP=ffff88800fbf75f0 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88800fbf7648 R11=00000000000b6996 R12=ffffed1001f7eecb R13=ffffed1001f7eeca R14=ffff88800fbf7690 R15=ffff88800fbf7648 RIP=ffffffff811305d0 RFL=00000216 [----AP-] 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 00007fc917182900 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=00007fc91773a0b0 CR3=000000000ea6e000 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=ffffffff81807ebb RBX=0000000000000003 RCX=0000000000000001 RDX=0000000000000cc0 RSI=000000000000000a RDI=ffff88800d84fad8 RBP=dffffc0000000000 RSP=ffff88800d84fa30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000a R13=0000000000000cc0 R14=ffff88800d84fac0 R15=0000000000000cc0 RIP=ffffffff813ad5cf 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 00007ff85084b900 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=00007ff84fc37660 CR3=000000000d832000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=155a05f1b3708bf500000000000ae988 XMM05=544f31a6e15fe34b0000000000136578 XMM06=4fda316b135da52b0000000000134ff8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000