Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.898418] BUG: Bad rss-counter state mm:00000000ece1ed42 type:MM_FILEPAGES val:33 [ 35.899892] BUG: Bad rss-counter state mm:00000000ece1ed42 type:MM_ANONPAGES val:22 [ 36.047101] ================================================================== [ 36.047990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.048915] Read of size 8 at addr ffff88800e4fb798 by task sshd/219 [ 36.049684] [ 36.049998] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.050820] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.051732] Call Trace: [ 36.052034] [ 36.052303] dump_stack_lvl+0x91/0xf0 [ 36.052768] print_report+0xcc/0x620 [ 36.053230] ? __virt_addr_valid+0x102/0x340 [ 36.053783] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.054368] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.054944] kasan_report+0xbe/0xf0 [ 36.055398] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.055991] vma_interval_tree_remove+0xc75/0xec0 [ 36.056571] vma_prepare+0xc54/0x11a0 [ 36.057043] __split_vma+0x5af/0x950 [ 36.057503] ? __pfx___split_vma+0x10/0x10 [ 36.058046] ? find_held_lock+0x2c/0x110 [ 36.058558] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.059108] ? lock_is_held_type+0x9f/0x120 [ 36.059635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.060228] ? mtree_range_walk+0x632/0x900 [ 36.060764] ? mas_walk+0x5c7/0x7c0 [ 36.061228] do_vmi_munmap+0x1f1/0x2b0 [ 36.061721] mmap_region+0x1f9/0x2660 [ 36.062196] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.062706] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.063418] ? __pfx_lock_acquire+0x10/0x10 [ 36.063948] ? __pfx_mmap_region+0x10/0x10 [ 36.064463] ? security_mmap_addr+0x7d/0xa0 [ 36.064977] ? get_unmapped_area+0x1f5/0x3f0 [ 36.065508] do_mmap+0x854/0xf00 [ 36.065942] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.066427] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.066976] ksys_mmap_pgoff+0x3af/0x500 [ 36.067470] do_syscall_64+0x3f/0x90 [ 36.067931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.068561] RIP: 0033:0x7f827d68bd82 [ 36.069015] 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 [ 36.071087] RSP: 002b:00007ffd047f7dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.071959] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f827d68bd82 [ 36.072790] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f827cac5000 [ 36.073611] RBP: 00007f827cac5000 R08: 0000000000000009 R09: 0000000000001000 [ 36.074451] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f843673ec0 [ 36.075283] R13: 00007ffd047f7df0 R14: 00007ffd047f7e20 R15: 00007ffd047f8180 [ 36.076113] [ 36.076395] [ 36.076615] Allocated by task 212: [ 36.077039] kasan_save_stack+0x22/0x50 [ 36.077526] kasan_set_track+0x25/0x30 [ 36.078019] __kasan_slab_alloc+0x59/0x70 [ 36.078527] kmem_cache_alloc+0x16b/0x370 [ 36.079029] vm_area_dup+0x20/0x160 [ 36.079471] __split_vma+0x170/0x950 [ 36.079921] split_vma+0xc6/0x110 [ 36.080350] mprotect_fixup+0x8d2/0xb30 [ 36.080851] do_mprotect_pkey+0x87e/0xd40 [ 36.081352] __x64_sys_mprotect+0x78/0xc0 [ 36.081882] do_syscall_64+0x3f/0x90 [ 36.082353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.082990] [ 36.083205] Freed by task 212: [ 36.083579] kasan_save_stack+0x22/0x50 [ 36.084080] kasan_set_track+0x25/0x30 [ 36.084548] kasan_save_free_info+0x2b/0x50 [ 36.085045] __kasan_slab_free+0x10a/0x190 [ 36.085546] kmem_cache_free+0x10d/0x4d0 [ 36.086034] rcu_core+0x8c8/0x2860 [ 36.086449] __do_softirq+0x1b7/0x7d4 [ 36.086895] [ 36.087097] Last potentially related work creation: [ 36.087645] kasan_save_stack+0x22/0x50 [ 36.088121] __kasan_record_aux_stack+0x8e/0xa0 [ 36.088662] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.089268] remove_vma+0x139/0x170 [ 36.089761] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.090291] do_vmi_munmap+0x1f1/0x2b0 [ 36.090744] __vm_munmap+0x138/0x3a0 [ 36.091185] __x64_sys_munmap+0x59/0x80 [ 36.091654] do_syscall_64+0x3f/0x90 [ 36.092097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.092702] [ 36.092908] Second to last potentially related work creation: [ 36.093543] kasan_save_stack+0x22/0x50 [ 36.094019] __kasan_record_aux_stack+0x8e/0xa0 [ 36.094556] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.095157] remove_vma+0x139/0x170 [ 36.095577] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.096095] do_vmi_munmap+0x1f1/0x2b0 [ 36.096552] mmap_region+0x1f9/0x2660 [ 36.096999] do_mmap+0x854/0xf00 [ 36.097405] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.097872] ksys_mmap_pgoff+0x3af/0x500 [ 36.098340] do_syscall_64+0x3f/0x90 [ 36.098784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.099383] [ 36.099590] The buggy address belongs to the object at ffff88800e4fb740 [ 36.099590] which belongs to the cache vm_area_struct of size 168 [ 36.100953] The buggy address is located 88 bytes inside of [ 36.100953] freed 168-byte region [ffff88800e4fb740, ffff88800e4fb7e8) [ 36.102269] [ 36.102475] The buggy address belongs to the physical page: [ 36.103092] page:00000000b3903ab8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4fb [ 36.104099] memcg:ffff88800d8c2e01 [ 36.104495] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.105098] page_type: 0xffffffff() [ 36.105524] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 36.106392] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8c2e01 [ 36.107242] page dumped because: kasan: bad access detected [ 36.107860] [ 36.108064] Memory state around the buggy address: [ 36.108605] ffff88800e4fb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.109406] ffff88800e4fb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.110225] >ffff88800e4fb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.111017] ^ [ 36.111479] ffff88800e4fb800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.112281] ffff88800e4fb880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.113078] ================================================================== [ 36.114502] Disabling lock debugging due to kernel taint [ 37.773431] BUG: Bad rss-counter state mm:000000001e83db5c type:MM_FILEPAGES val:33 [ 37.774184] BUG: Bad rss-counter state mm:000000001e83db5c type:MM_ANONPAGES val:22 [ 38.181913] BUG: Bad rss-counter state mm:0000000028f6f488 type:MM_FILEPAGES val:33 [ 38.183260] BUG: Bad rss-counter state mm:0000000028f6f488 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18633' (ECDSA) to the list of known hosts. 2023/06/19 17:31:33 fuzzer started 2023/06/19 17:31:33 dialing manager at localhost:44161 2023/06/19 17:31:33 checking machine... 2023/06/19 17:31:33 checking revisions... [ 38.892497] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:31:33 testing simple program... [ 38.942873] cgroup: Unknown subsys name 'net' [ 39.044154] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:31:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=ffffffff86137d01 RDX=1ffff1100d9c136c RSI=ffffffff8180c8da RDI=ffff88806ce09b6c RBP=0000000000000003 RSP=ffff88806ce09a78 R8 =ffffffff86137dd6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888016a39b40 R15=ffff88800c657b80 RIP=ffffffff813ad4cf 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 00007fbe2306b900 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=00007ffdc3106000 CR3=0000000016bda000 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=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 info registers vcpu 1 RAX=0000001630431810 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=0000000000054082 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f08ac R11=ffff88806cf09ff8 R12=0000000000054082 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000012 [----A--] 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 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=00007ffc68aa6be8 CR3=0000000016bc6000 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=2032333a31333a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a31333a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000