[ 30.896468] BUG: Bad rss-counter state mm:00000000783ee8b0 type:MM_FILEPAGES val:33 [ 30.897899] BUG: Bad rss-counter state mm:00000000783ee8b0 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.044972] ================================================================== [ 31.046076] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.047194] Read of size 8 at addr ffff888008eeaed8 by task sshd/220 [ 31.048289] [ 31.048553] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.049370] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.050304] Call Trace: [ 31.050614] [ 31.050893] dump_stack_lvl+0x91/0xf0 [ 31.051362] print_report+0xcc/0x620 [ 31.051825] ? __virt_addr_valid+0x102/0x340 [ 31.052352] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.052939] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.053526] kasan_report+0xbe/0xf0 [ 31.053992] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.054585] vma_interval_tree_remove+0xc75/0xec0 [ 31.055200] vma_prepare+0xc54/0x11a0 [ 31.055681] __split_vma+0x5af/0x950 [ 31.056154] ? __pfx___split_vma+0x10/0x10 [ 31.056683] ? find_held_lock+0x2c/0x110 [ 31.057220] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.057801] ? lock_is_held_type+0x9f/0x120 [ 31.058341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.058954] ? mtree_range_walk+0x632/0x900 [ 31.059511] ? mas_walk+0x5c7/0x7c0 [ 31.059986] do_vmi_munmap+0x1f1/0x2b0 [ 31.060477] mmap_region+0x1f9/0x2660 [ 31.060967] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.061479] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.062266] ? __pfx_lock_acquire+0x10/0x10 [ 31.062799] ? __pfx_mmap_region+0x10/0x10 [ 31.063340] ? security_mmap_addr+0x7d/0xa0 [ 31.063878] ? get_unmapped_area+0x1f5/0x3f0 [ 31.064432] do_mmap+0x854/0xf00 [ 31.064883] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.065380] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.065978] ksys_mmap_pgoff+0x3af/0x500 [ 31.066494] do_syscall_64+0x3f/0x90 [ 31.066975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.067621] RIP: 0033:0x7fbe76130d82 [ 31.068074] 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 [ 31.070195] RSP: 002b:00007fffcb4d43c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.071112] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe76130d82 [ 31.071975] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe7556a000 [ 31.072824] RBP: 00007fbe7556a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.073677] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a60bff0f70 [ 31.074551] R13: 00007fffcb4d43e0 R14: 00007fffcb4d4410 R15: 00007fffcb4d4770 [ 31.075415] [ 31.075728] [ 31.075942] Allocated by task 213: [ 31.076377] kasan_save_stack+0x22/0x50 [ 31.076906] kasan_set_track+0x25/0x30 [ 31.077423] __kasan_slab_alloc+0x59/0x70 [ 31.077967] kmem_cache_alloc+0x16b/0x370 [ 31.078490] vm_area_dup+0x20/0x160 [ 31.078977] __split_vma+0x170/0x950 [ 31.079490] split_vma+0xc6/0x110 [ 31.079977] mprotect_fixup+0x8d2/0xb30 [ 31.080494] do_mprotect_pkey+0x87e/0xd40 [ 31.081031] __x64_sys_mprotect+0x78/0xc0 [ 31.081585] do_syscall_64+0x3f/0x90 [ 31.082080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.082724] [ 31.082944] Freed by task 213: [ 31.083352] kasan_save_stack+0x22/0x50 [ 31.083856] kasan_set_track+0x25/0x30 [ 31.084350] kasan_save_free_info+0x2b/0x50 [ 31.084884] __kasan_slab_free+0x10a/0x190 [ 31.085563] kmem_cache_free+0x10d/0x4d0 [ 31.086162] rcu_core+0x8c8/0x2860 [ 31.086669] __do_softirq+0x1b7/0x7d4 [ 31.087153] [ 31.087368] Last potentially related work creation: [ 31.087954] kasan_save_stack+0x22/0x50 [ 31.088458] __kasan_record_aux_stack+0x8e/0xa0 [ 31.089167] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.089829] remove_vma+0x139/0x170 [ 31.090288] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.090838] do_vmi_munmap+0x1f1/0x2b0 [ 31.091322] __vm_munmap+0x138/0x3a0 [ 31.091794] __x64_sys_munmap+0x59/0x80 [ 31.092285] do_syscall_64+0x3f/0x90 [ 31.092760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.093398] [ 31.093610] Second to last potentially related work creation: [ 31.094439] kasan_save_stack+0x22/0x50 [ 31.094986] __kasan_record_aux_stack+0x8e/0xa0 [ 31.095605] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.096392] remove_vma+0x139/0x170 [ 31.096931] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.097548] do_vmi_munmap+0x1f1/0x2b0 [ 31.098091] mmap_region+0x1f9/0x2660 [ 31.098681] do_mmap+0x854/0xf00 [ 31.099136] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.099634] ksys_mmap_pgoff+0x3af/0x500 [ 31.100131] do_syscall_64+0x3f/0x90 [ 31.100599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.101271] [ 31.101492] The buggy address belongs to the object at ffff888008eeae80 [ 31.101492] which belongs to the cache vm_area_struct of size 168 [ 31.103014] The buggy address is located 88 bytes inside of [ 31.103014] freed 168-byte region [ffff888008eeae80, ffff888008eeaf28) [ 31.104661] [ 31.104930] The buggy address belongs to the physical page: [ 31.105760] page:00000000c5183c91 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8eea [ 31.107099] memcg:ffff88801407e501 [ 31.107632] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.108367] page_type: 0xffffffff() [ 31.108852] raw: 0100000000000200 ffff88800879fc80 ffffea00003b90c0 dead000000000006 [ 31.109868] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801407e501 [ 31.110783] page dumped because: kasan: bad access detected [ 31.111453] [ 31.111669] Memory state around the buggy address: [ 31.112251] ffff888008eead80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.113108] ffff888008eeae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.113980] >ffff888008eeae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.114828] ^ [ 31.115564] ffff888008eeaf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.116420] ffff888008eeaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.117272] ================================================================== [ 31.118290] Disabling lock debugging due to kernel taint [ 33.054189] BUG: Bad rss-counter state mm:00000000b7d3f990 type:MM_FILEPAGES val:33 [ 33.055406] BUG: Bad rss-counter state mm:00000000b7d3f990 type:MM_ANONPAGES val:22 [ 33.464304] BUG: Bad rss-counter state mm:000000000b087098 type:MM_FILEPAGES val:33 [ 33.465286] BUG: Bad rss-counter state mm:000000000b087098 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29520' (ECDSA) to the list of known hosts. 2023/06/19 22:07:18 fuzzer started 2023/06/19 22:07:19 dialing manager at localhost:44161 2023/06/19 22:07:19 checking machine... 2023/06/19 22:07:19 checking revisions... [ 34.194893] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:07:19 testing simple program... [ 34.253098] cgroup: Unknown subsys name 'net' [ 34.309301] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:07:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007ffeef146838 RCX=0000000000000008 RDX=00007ffeef146850 RSI=0000000000000000 RDI=00007ffeef146838 RBP=00007ffeef146850 RSP=00007ffeef146810 R8 =000000000000001e R9 =0000000000000000 R10=000000000000001e R11=00007ffeef146cd0 R12=00007ffeef146840 R13=00007ffeef146cf0 R14=000000000000001e R15=0000000000000000 RIP=00007f35393d1b8f RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f35388de900 00000000 00000000 GS =0000 0000000000000000 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=00007f3537d13be0 CR3=000000000c53a000 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=9d0137c804d2828cdf4d9837108b454e XMM02=0000000000120198d59e07bde36eea69 XMM03=00000000001202c0ec2efd57dc4c00df XMM04=c054933aac89335000000000000ae988 XMM05=b1540bc6101764a900000000001362d0 XMM06=4fda316b135da52b0000000000134a80 XMM07=fb795ef6d65770560000000000123f68 XMM08=2c67c8bc2e329bc300000000001202c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008f7d000 RCX=0000000000000000 RDX=ffff888019cad1c0 RSI=ffffffff8386d031 RDI=ffff888008f7d4f8 RBP=ffff8880136946c0 RSP=ffff8880190179e0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888008c78000 R13=0000000000000000 R14=dffffc0000000000 R15=ffff888008f7d6b8 RIP=ffffffff8386d04d 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 00007fe33b9e6900 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=00007ffe73bda000 CR3=000000000e63a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000