[ 31.288868] BUG: Bad rss-counter state mm:00000000b05f359f type:MM_FILEPAGES val:33 [ 31.290102] BUG: Bad rss-counter state mm:00000000b05f359f type:MM_ANONPAGES val:22 [ 31.328147] ================================================================== [ 31.329101] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.330044] Read of size 8 at addr ffff88800ec7f228 by task sshd/218 [ 31.330810] [ 31.331032] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.331996] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.332983] Call Trace: [ 31.333311] [ 31.333598] dump_stack_lvl+0x91/0xf0 [ 31.334100] print_report+0xcc/0x620 [ 31.334589] ? __virt_addr_valid+0x102/0x340 [ 31.335149] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.335775] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336401] kasan_report+0xbe/0xf0 [ 31.336878] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.337513] vma_interval_tree_remove+0xc75/0xec0 [ 31.338125] vma_prepare+0xc54/0x11a0 [ 31.338603] __split_vma+0x5af/0x950 [ 31.339083] ? __pfx___split_vma+0x10/0x10 [ 31.339616] ? find_held_lock+0x2c/0x110 [ 31.340142] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.340705] ? lock_is_held_type+0x9f/0x120 [ 31.341273] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.341884] ? mtree_range_walk+0x632/0x900 [ 31.342435] ? mas_walk+0x5c7/0x7c0 [ 31.342910] do_vmi_munmap+0x1f1/0x2b0 [ 31.343413] mmap_region+0x1f9/0x2660 [ 31.343897] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.344412] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.345136] ? __pfx_lock_acquire+0x10/0x10 [ 31.345674] ? __pfx_mmap_region+0x10/0x10 [ 31.346211] ? security_mmap_addr+0x7d/0xa0 [ 31.346754] ? get_unmapped_area+0x1f5/0x3f0 [ 31.347315] do_mmap+0x854/0xf00 [ 31.347757] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.348251] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.348828] ksys_mmap_pgoff+0x3af/0x500 [ 31.349351] do_syscall_64+0x3f/0x90 [ 31.349838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.350489] RIP: 0033:0x7f7063016d82 [ 31.350951] 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 [ 31.353120] RSP: 002b:00007fff3ae831f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.354041] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7063016d82 [ 31.354899] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7062450000 [ 31.355753] RBP: 00007f7062450000 R08: 0000000000000009 R09: 0000000000001000 [ 31.356605] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624e60d2f70 [ 31.357473] R13: 00007fff3ae83210 R14: 00007fff3ae83240 R15: 00007fff3ae835a0 [ 31.358327] [ 31.358626] [ 31.358844] Allocated by task 210: [ 31.359271] kasan_save_stack+0x22/0x50 [ 31.359788] kasan_set_track+0x25/0x30 [ 31.360283] __kasan_slab_alloc+0x59/0x70 [ 31.360813] kmem_cache_alloc+0x16b/0x370 [ 31.361346] vm_area_dup+0x20/0x160 [ 31.361804] __split_vma+0x170/0x950 [ 31.362281] split_vma+0xc6/0x110 [ 31.362727] mprotect_fixup+0x8d2/0xb30 [ 31.363238] do_mprotect_pkey+0x87e/0xd40 [ 31.363764] __x64_sys_mprotect+0x78/0xc0 [ 31.364297] do_syscall_64+0x3f/0x90 [ 31.364776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.365452] [ 31.365671] Freed by task 210: [ 31.366069] kasan_save_stack+0x22/0x50 [ 31.366577] kasan_set_track+0x25/0x30 [ 31.367075] kasan_save_free_info+0x2b/0x50 [ 31.367619] __kasan_slab_free+0x10a/0x190 [ 31.368161] kmem_cache_free+0x10d/0x4d0 [ 31.368677] rcu_core+0x8c8/0x2860 [ 31.369138] __do_softirq+0x1b7/0x7d4 [ 31.369618] [ 31.369837] Last potentially related work creation: [ 31.370430] kasan_save_stack+0x22/0x50 [ 31.370936] __kasan_record_aux_stack+0x8e/0xa0 [ 31.371511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.372164] remove_vma+0x139/0x170 [ 31.372629] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.373211] do_vmi_munmap+0x1f1/0x2b0 [ 31.373707] __vm_munmap+0x138/0x3a0 [ 31.374173] __x64_sys_munmap+0x59/0x80 [ 31.374685] do_syscall_64+0x3f/0x90 [ 31.375171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.375830] [ 31.376055] Second to last potentially related work creation: [ 31.376748] kasan_save_stack+0x22/0x50 [ 31.377276] __kasan_record_aux_stack+0x8e/0xa0 [ 31.377860] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.378509] remove_vma+0x139/0x170 [ 31.378966] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.379534] do_vmi_munmap+0x1f1/0x2b0 [ 31.380033] mmap_region+0x1f9/0x2660 [ 31.380524] do_mmap+0x854/0xf00 [ 31.380976] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.381485] ksys_mmap_pgoff+0x3af/0x500 [ 31.382008] do_syscall_64+0x3f/0x90 [ 31.382501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.383168] [ 31.383393] The buggy address belongs to the object at ffff88800ec7f1d0 [ 31.383393] which belongs to the cache vm_area_struct of size 168 [ 31.384917] The buggy address is located 88 bytes inside of [ 31.384917] freed 168-byte region [ffff88800ec7f1d0, ffff88800ec7f278) [ 31.386396] [ 31.386618] The buggy address belongs to the physical page: [ 31.387302] page:000000005e92dfe2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec7f [ 31.388425] memcg:ffff88800dfff101 [ 31.388868] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.389610] page_type: 0xffffffff() [ 31.390077] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380380 dead000000000007 [ 31.391025] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfff101 [ 31.391966] page dumped because: kasan: bad access detected [ 31.392648] [ 31.392871] Memory state around the buggy address: [ 31.393480] ffff88800ec7f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.394373] ffff88800ec7f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.395256] >ffff88800ec7f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.396140] ^ [ 31.396717] ffff88800ec7f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.397621] ffff88800ec7f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.398510] ================================================================== [ 31.399572] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.907236] BUG: Bad rss-counter state mm:00000000963b05d8 type:MM_FILEPAGES val:33 [ 33.908243] BUG: Bad rss-counter state mm:00000000963b05d8 type:MM_ANONPAGES val:22 [ 34.376969] BUG: Bad rss-counter state mm:00000000aabfc42b type:MM_FILEPAGES val:33 [ 34.377984] BUG: Bad rss-counter state mm:00000000aabfc42b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9835' (ECDSA) to the list of known hosts. 2023/06/21 10:28:39 fuzzer started 2023/06/21 10:28:39 dialing manager at localhost:36067 2023/06/21 10:28:39 checking machine... 2023/06/21 10:28:39 checking revisions... [ 35.062482] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:28:39 testing simple program... [ 35.112742] cgroup: Unknown subsys name 'net' [ 35.155758] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:28:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009b1b680 RCX=ffffffff83ab193d RDX=ffff8880142d1b40 RSI=0000000000000004 RDI=ffffffff87f97e40 RBP=ffffffff87f97e40 RSP=ffff8880165af500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000b5e00000b5e R12=0000000000000000 R13=00000000000000d0 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff8180fea8 RFL=00000293 [--S-A-C] 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 00007fe50ae93900 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=00007fe50b44a618 CR3=000000001cc18000 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=00007f71e327dfb0 CR3=0000000016a00000 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=2038333a38323a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a38323a3031203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000