[ 24.167723] BUG: Bad rss-counter state mm:00000000a9bc6c59 type:MM_FILEPAGES val:33 [ 24.168441] BUG: Bad rss-counter state mm:00000000a9bc6c59 type:MM_ANONPAGES val:22 [ 24.341042] ================================================================== [ 24.341987] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.342948] Read of size 8 at addr ffff888008ed2968 by task sshd/219 [ 24.343821] [ 24.344043] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.344935] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.345966] Call Trace: [ 24.346291] [ 24.346584] dump_stack_lvl+0x91/0xf0 [ 24.347085] print_report+0xcc/0x620 [ 24.347582] ? __virt_addr_valid+0x102/0x340 [ 24.348141] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.348767] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.349405] kasan_report+0xbe/0xf0 [ 24.349905] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.350532] vma_interval_tree_remove+0xc75/0xec0 [ 24.351131] vma_prepare+0xc54/0x11a0 [ 24.351614] __split_vma+0x5af/0x950 [ 24.352084] ? __pfx___split_vma+0x10/0x10 [ 24.352617] ? find_held_lock+0x2c/0x110 [ 24.353159] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.353724] ? lock_is_held_type+0x9f/0x120 [ 24.354260] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.354871] ? mtree_range_walk+0x632/0x900 [ 24.355417] ? mas_walk+0x5c7/0x7c0 [ 24.355897] do_vmi_munmap+0x1f1/0x2b0 [ 24.356386] mmap_region+0x1f9/0x2660 [ 24.356864] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.357388] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.358103] ? __pfx_lock_acquire+0x10/0x10 [ 24.358637] ? __pfx_mmap_region+0x10/0x10 [ 24.359167] ? security_mmap_addr+0x7d/0xa0 [ 24.359696] ? get_unmapped_area+0x1f5/0x3f0 [ 24.360245] do_mmap+0x854/0xf00 [ 24.360682] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.361187] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.361752] ksys_mmap_pgoff+0x3af/0x500 [ 24.362267] do_syscall_64+0x3f/0x90 [ 24.362742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.363388] RIP: 0033:0x7f15c6fa2d82 [ 24.363842] 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 [ 24.365963] RSP: 002b:00007ffeb7b9ca78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.366871] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f15c6fa2d82 [ 24.367712] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15c63dc000 [ 24.368549] RBP: 00007f15c63dc000 R08: 0000000000000009 R09: 0000000000001000 [ 24.369402] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565124866ec0 [ 24.370240] R13: 00007ffeb7b9ca90 R14: 00007ffeb7b9cac0 R15: 00007ffeb7b9ce20 [ 24.371086] [ 24.371380] [ 24.371593] Allocated by task 212: [ 24.372018] kasan_save_stack+0x22/0x50 [ 24.372521] kasan_set_track+0x25/0x30 [ 24.373023] __kasan_slab_alloc+0x59/0x70 [ 24.373545] kmem_cache_alloc+0x16b/0x370 [ 24.374059] vm_area_dup+0x20/0x160 [ 24.374523] __split_vma+0x170/0x950 [ 24.374987] split_vma+0xc6/0x110 [ 24.375426] mprotect_fixup+0x8d2/0xb30 [ 24.375930] do_mprotect_pkey+0x87e/0xd40 [ 24.376453] __x64_sys_mprotect+0x78/0xc0 [ 24.377005] do_syscall_64+0x3f/0x90 [ 24.377481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.378126] [ 24.378340] Freed by task 19: [ 24.378721] kasan_save_stack+0x22/0x50 [ 24.379223] kasan_set_track+0x25/0x30 [ 24.379717] kasan_save_free_info+0x2b/0x50 [ 24.380247] __kasan_slab_free+0x10a/0x190 [ 24.380776] kmem_cache_free+0x10d/0x4d0 [ 24.381289] rcu_core+0x8c8/0x2860 [ 24.381731] __do_softirq+0x1b7/0x7d4 [ 24.382207] [ 24.382421] Last potentially related work creation: [ 24.383008] kasan_save_stack+0x22/0x50 [ 24.383520] __kasan_record_aux_stack+0x8e/0xa0 [ 24.384116] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.384760] remove_vma+0x139/0x170 [ 24.385250] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.385819] do_vmi_munmap+0x1f1/0x2b0 [ 24.386313] __vm_munmap+0x138/0x3a0 [ 24.386799] __x64_sys_munmap+0x59/0x80 [ 24.387315] do_syscall_64+0x3f/0x90 [ 24.387850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.388536] [ 24.388758] Second to last potentially related work creation: [ 24.389476] kasan_save_stack+0x22/0x50 [ 24.390001] __kasan_record_aux_stack+0x8e/0xa0 [ 24.390601] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.391268] remove_vma+0x139/0x170 [ 24.391741] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.392337] do_vmi_munmap+0x1f1/0x2b0 [ 24.392849] mmap_region+0x1f9/0x2660 [ 24.393376] do_mmap+0x854/0xf00 [ 24.393827] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.394325] ksys_mmap_pgoff+0x3af/0x500 [ 24.394835] do_syscall_64+0x3f/0x90 [ 24.395329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.395974] [ 24.396201] The buggy address belongs to the object at ffff888008ed2910 [ 24.396201] which belongs to the cache vm_area_struct of size 168 [ 24.397723] The buggy address is located 88 bytes inside of [ 24.397723] freed 168-byte region [ffff888008ed2910, ffff888008ed29b8) [ 24.399223] [ 24.399446] The buggy address belongs to the physical page: [ 24.400152] page:0000000048c0bea1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8ed2 [ 24.401286] memcg:ffff88800c9f5e01 [ 24.401741] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.402480] page_type: 0xffffffff() [ 24.402956] raw: 0100000000000200 ffff88800879fc80 ffffea00003b0340 dead000000000003 [ 24.403936] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9f5e01 [ 24.404911] page dumped because: kasan: bad access detected [ 24.405609] [ 24.405829] Memory state around the buggy address: [ 24.406439] ffff888008ed2800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.407340] ffff888008ed2880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.408248] >ffff888008ed2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.409158] ^ [ 24.409982] ffff888008ed2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 24.410899] ffff888008ed2a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.411800] ================================================================== [ 24.412866] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.562072] BUG: Bad rss-counter state mm:00000000b4014eac type:MM_FILEPAGES val:33 [ 26.562992] BUG: Bad rss-counter state mm:00000000b4014eac type:MM_ANONPAGES val:22 [ 27.056177] BUG: Bad rss-counter state mm:000000007a34574e type:MM_FILEPAGES val:33 [ 27.057187] BUG: Bad rss-counter state mm:000000007a34574e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37042' (ECDSA) to the list of known hosts. 2023/06/19 15:57:56 fuzzer started 2023/06/19 15:57:56 dialing manager at localhost:44161 2023/06/19 15:57:56 checking machine... 2023/06/19 15:57:56 checking revisions... [ 27.768083] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:57:56 testing simple program... [ 27.805699] cgroup: Unknown subsys name 'net' [ 27.845999] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:57:55 Registers: info registers vcpu 0 RAX=ffff88801cd37710 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce0a001 RSI=ffff88806ce09ff8 RDI=ffff88806ce09ff8 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff864b115c R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b523e R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ff8 R15=ffff88806ce09a70 RIP=ffffffff81130df7 RFL=00000202 [-------] 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 00007ff284def900 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=00007ff2853a6618 CR3=0000000016724000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffd2e761ff8 CR3=000000000fe2c000 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=2035353a37353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a37353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000