Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.567838] BUG: Bad rss-counter state mm:00000000e1e64bf2 type:MM_FILEPAGES val:33 [ 30.568940] BUG: Bad rss-counter state mm:00000000e1e64bf2 type:MM_ANONPAGES val:22 [ 30.737327] ================================================================== [ 30.738232] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.739174] Read of size 8 at addr ffff88800df2e140 by task sshd/219 [ 30.739965] [ 30.740294] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.741151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.742121] Call Trace: [ 30.742470] [ 30.742752] dump_stack_lvl+0x91/0xf0 [ 30.743240] print_report+0xcc/0x620 [ 30.743753] ? __virt_addr_valid+0x102/0x340 [ 30.744305] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.744929] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.745546] kasan_report+0xbe/0xf0 [ 30.746025] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746648] vma_interval_tree_remove+0xc75/0xec0 [ 30.747244] vma_prepare+0xc54/0x11a0 [ 30.747733] __split_vma+0x5af/0x950 [ 30.748204] ? __pfx___split_vma+0x10/0x10 [ 30.748742] ? find_held_lock+0x2c/0x110 [ 30.749262] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.749836] ? lock_is_held_type+0x9f/0x120 [ 30.750392] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.751007] ? mtree_range_walk+0x632/0x900 [ 30.751561] ? mas_walk+0x5c7/0x7c0 [ 30.752055] do_vmi_munmap+0x1f1/0x2b0 [ 30.752549] mmap_region+0x1f9/0x2660 [ 30.753034] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.753548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.754261] ? __pfx_lock_acquire+0x10/0x10 [ 30.754795] ? __pfx_mmap_region+0x10/0x10 [ 30.755325] ? security_mmap_addr+0x7d/0xa0 [ 30.755873] ? get_unmapped_area+0x1f5/0x3f0 [ 30.756426] do_mmap+0x854/0xf00 [ 30.756867] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.757370] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.757939] ksys_mmap_pgoff+0x3af/0x500 [ 30.758451] do_syscall_64+0x3f/0x90 [ 30.758929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.759588] RIP: 0033:0x7fcca6a9fd82 [ 30.760053] 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 [ 30.762184] RSP: 002b:00007ffca7cf7578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.763088] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcca6a9fd82 [ 30.763972] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcca5ed9000 [ 30.764844] RBP: 00007fcca5ed9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.765696] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560161f01ec0 [ 30.766547] R13: 00007ffca7cf7590 R14: 00007ffca7cf75c0 R15: 00007ffca7cf7920 [ 30.767421] [ 30.767718] [ 30.767933] Allocated by task 212: [ 30.768368] kasan_save_stack+0x22/0x50 [ 30.768875] kasan_set_track+0x25/0x30 [ 30.769368] __kasan_slab_alloc+0x59/0x70 [ 30.769890] kmem_cache_alloc+0x16b/0x370 [ 30.770410] vm_area_dup+0x20/0x160 [ 30.770860] __split_vma+0x170/0x950 [ 30.771329] split_vma+0xc6/0x110 [ 30.771778] mprotect_fixup+0x8d2/0xb30 [ 30.772276] do_mprotect_pkey+0x87e/0xd40 [ 30.772796] __x64_sys_mprotect+0x78/0xc0 [ 30.773318] do_syscall_64+0x3f/0x90 [ 30.773798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.774445] [ 30.774659] Freed by task 210: [ 30.775054] kasan_save_stack+0x22/0x50 [ 30.775561] kasan_set_track+0x25/0x30 [ 30.776075] kasan_save_free_info+0x2b/0x50 [ 30.776606] __kasan_slab_free+0x10a/0x190 [ 30.777135] kmem_cache_free+0x10d/0x4d0 [ 30.777646] rcu_core+0x8c8/0x2860 [ 30.778087] __do_softirq+0x1b7/0x7d4 [ 30.778567] [ 30.778784] Last potentially related work creation: [ 30.779371] kasan_save_stack+0x22/0x50 [ 30.779892] __kasan_record_aux_stack+0x8e/0xa0 [ 30.780470] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.781121] remove_vma+0x139/0x170 [ 30.781582] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.782139] do_vmi_munmap+0x1f1/0x2b0 [ 30.782626] __vm_munmap+0x138/0x3a0 [ 30.783098] __x64_sys_munmap+0x59/0x80 [ 30.783595] do_syscall_64+0x3f/0x90 [ 30.784078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.784729] [ 30.784951] Second to last potentially related work creation: [ 30.785643] kasan_save_stack+0x22/0x50 [ 30.786150] __kasan_record_aux_stack+0x8e/0xa0 [ 30.786739] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.787379] remove_vma+0x139/0x170 [ 30.787853] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.788422] do_vmi_munmap+0x1f1/0x2b0 [ 30.788911] mmap_region+0x1f9/0x2660 [ 30.789381] do_mmap+0x854/0xf00 [ 30.789813] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.790312] ksys_mmap_pgoff+0x3af/0x500 [ 30.790808] do_syscall_64+0x3f/0x90 [ 30.791290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.791954] [ 30.792172] The buggy address belongs to the object at ffff88800df2e0e8 [ 30.792172] which belongs to the cache vm_area_struct of size 168 [ 30.793639] The buggy address is located 88 bytes inside of [ 30.793639] freed 168-byte region [ffff88800df2e0e8, ffff88800df2e190) [ 30.795083] [ 30.795298] The buggy address belongs to the physical page: [ 30.795973] page:00000000b1608a1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf2e [ 30.797070] memcg:ffff8880097d9001 [ 30.797501] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.798200] page_type: 0xffffffff() [ 30.798646] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.799576] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097d9001 [ 30.800503] page dumped because: kasan: bad access detected [ 30.801162] [ 30.801377] Memory state around the buggy address: [ 30.801950] ffff88800df2e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.802804] ffff88800df2e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.803656] >ffff88800df2e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.804545] ^ [ 30.805185] ffff88800df2e180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.806053] ffff88800df2e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.806904] ================================================================== [ 30.808026] Disabling lock debugging due to kernel taint [ 33.520885] BUG: Bad rss-counter state mm:00000000dc932b40 type:MM_FILEPAGES val:33 [ 33.521883] BUG: Bad rss-counter state mm:00000000dc932b40 type:MM_ANONPAGES val:22 [ 34.054729] BUG: Bad rss-counter state mm:00000000b9498141 type:MM_FILEPAGES val:33 [ 34.055857] BUG: Bad rss-counter state mm:00000000b9498141 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10442' (ECDSA) to the list of known hosts. 2023/06/21 01:51:34 fuzzer started 2023/06/21 01:51:34 dialing manager at localhost:36067 2023/06/21 01:51:35 checking machine... 2023/06/21 01:51:35 checking revisions... [ 34.696609] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:51:35 testing simple program... [ 34.748333] cgroup: Unknown subsys name 'net' [ 34.807946] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:51:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88806ce09c70 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff1100d9c138f RIP=ffffffff84536860 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 00007f99121f0900 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=00007f99127a7618 CR3=00000000100f4000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f067b46f018 CR3=000000000c5f8000 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=6ed4217cdd0adcae4b483fab711e56b1 XMM02=000000000011ad20ec2efd57dc4c00df XMM03=00000000001216c09d6195e1b82d6adf XMM04=ce08ecc70e794cdc00000000000ae988 XMM05=dfcdbad4f1609c370000000000132628 XMM06=806171799158d96700000000001324b0 XMM07=e042d86d42eb936e0000000000121940 XMM08=9d6195e1b82d6adf000000000011ad80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000