[ 26.671142] BUG: Bad rss-counter state mm:00000000aabf59db type:MM_FILEPAGES val:33 [ 26.672366] BUG: Bad rss-counter state mm:00000000aabf59db type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.792394] ================================================================== [ 26.793471] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.794608] Read of size 8 at addr ffff888015b215c8 by task sshd/220 [ 26.795648] [ 26.795866] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.796746] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.797760] Call Trace: [ 26.798099] [ 26.798384] dump_stack_lvl+0x91/0xf0 [ 26.798884] print_report+0xcc/0x620 [ 26.799381] ? __virt_addr_valid+0x102/0x340 [ 26.799950] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.800583] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.801204] kasan_report+0xbe/0xf0 [ 26.801684] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.802317] vma_interval_tree_remove+0xc75/0xec0 [ 26.802926] vma_prepare+0xc54/0x11a0 [ 26.803421] __split_vma+0x5af/0x950 [ 26.803901] ? __pfx___split_vma+0x10/0x10 [ 26.804445] ? find_held_lock+0x2c/0x110 [ 26.804971] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.805560] ? lock_is_held_type+0x9f/0x120 [ 26.806133] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.806741] ? mtree_range_walk+0x632/0x900 [ 26.807299] ? mas_walk+0x5c7/0x7c0 [ 26.807787] do_vmi_munmap+0x1f1/0x2b0 [ 26.808298] mmap_region+0x1f9/0x2660 [ 26.808789] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.809312] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.810035] ? __pfx_lock_acquire+0x10/0x10 [ 26.810572] ? __pfx_mmap_region+0x10/0x10 [ 26.811113] ? security_mmap_addr+0x7d/0xa0 [ 26.811660] ? get_unmapped_area+0x1f5/0x3f0 [ 26.812222] do_mmap+0x854/0xf00 [ 26.812664] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.813160] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.813745] ksys_mmap_pgoff+0x3af/0x500 [ 26.814283] do_syscall_64+0x3f/0x90 [ 26.814771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.815429] RIP: 0033:0x7f3d1e51ed82 [ 26.815898] 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 [ 26.818127] RSP: 002b:00007fff2dffcad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.819049] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3d1e51ed82 [ 26.819906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3d1d958000 [ 26.820767] RBP: 00007f3d1d958000 R08: 0000000000000009 R09: 0000000000001000 [ 26.821633] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c04419ec0 [ 26.822513] R13: 00007fff2dffcaf0 R14: 00007fff2dffcb20 R15: 00007fff2dffce80 [ 26.823379] [ 26.823676] [ 26.823902] Allocated by task 213: [ 26.824336] kasan_save_stack+0x22/0x50 [ 26.824850] kasan_set_track+0x25/0x30 [ 26.825352] __kasan_slab_alloc+0x59/0x70 [ 26.825887] kmem_cache_alloc+0x16b/0x370 [ 26.826425] vm_area_dup+0x20/0x160 [ 26.826893] __split_vma+0x170/0x950 [ 26.827369] split_vma+0xc6/0x110 [ 26.827811] mprotect_fixup+0x8d2/0xb30 [ 26.828326] do_mprotect_pkey+0x87e/0xd40 [ 26.828851] __x64_sys_mprotect+0x78/0xc0 [ 26.829383] do_syscall_64+0x3f/0x90 [ 26.829862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.830506] [ 26.830730] Freed by task 203: [ 26.831123] kasan_save_stack+0x22/0x50 [ 26.831626] kasan_set_track+0x25/0x30 [ 26.832128] kasan_save_free_info+0x2b/0x50 [ 26.832678] __kasan_slab_free+0x10a/0x190 [ 26.833212] kmem_cache_free+0x10d/0x4d0 [ 26.833727] rcu_core+0x8c8/0x2860 [ 26.834199] __do_softirq+0x1b7/0x7d4 [ 26.834683] [ 26.834907] Last potentially related work creation: [ 26.835501] kasan_save_stack+0x22/0x50 [ 26.836023] __kasan_record_aux_stack+0x8e/0xa0 [ 26.836639] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.837291] remove_vma+0x139/0x170 [ 26.837743] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.838321] do_vmi_munmap+0x1f1/0x2b0 [ 26.838808] __vm_munmap+0x138/0x3a0 [ 26.839278] __x64_sys_munmap+0x59/0x80 [ 26.839780] do_syscall_64+0x3f/0x90 [ 26.840258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.840912] [ 26.841130] The buggy address belongs to the object at ffff888015b21570 [ 26.841130] which belongs to the cache vm_area_struct of size 168 [ 26.842617] The buggy address is located 88 bytes inside of [ 26.842617] freed 168-byte region [ffff888015b21570, ffff888015b21618) [ 26.844026] [ 26.844244] The buggy address belongs to the physical page: [ 26.844909] page:00000000e00b9b26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b21 [ 26.846027] memcg:ffff88800dda2c01 [ 26.846460] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.847106] page_type: 0xffffffff() [ 26.847556] raw: 0100000000000200 ffff88800879fc80 ffffea00003b9a00 dead000000000004 [ 26.848475] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dda2c01 [ 26.849380] page dumped because: kasan: bad access detected [ 26.850053] [ 26.850267] Memory state around the buggy address: [ 26.850854] ffff888015b21480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.851709] ffff888015b21500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 26.852569] >ffff888015b21580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.853422] ^ [ 26.854092] ffff888015b21600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 26.854954] ffff888015b21680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.855813] ================================================================== [ 26.856794] Disabling lock debugging due to kernel taint [ 28.979380] BUG: Bad rss-counter state mm:000000002c93b104 type:MM_FILEPAGES val:33 [ 28.980479] BUG: Bad rss-counter state mm:000000002c93b104 type:MM_ANONPAGES val:22 [ 29.570513] BUG: Bad rss-counter state mm:00000000664d2d07 type:MM_FILEPAGES val:33 [ 29.571704] BUG: Bad rss-counter state mm:00000000664d2d07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59570' (ECDSA) to the list of known hosts. 2023/06/20 02:12:34 fuzzer started 2023/06/20 02:12:35 dialing manager at localhost:44161 2023/06/20 02:12:35 checking machine... 2023/06/20 02:12:35 checking revisions... [ 30.219158] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:12:35 testing simple program... [ 30.259468] cgroup: Unknown subsys name 'net' [ 30.304100] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:12:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85db8af0 RCX=ffffffff813782a7 RDX=0000000000000000 RSI=ffffffff860d1670 RDI=ffffffff85db8aec RBP=ffffffff85db8af4 RSP=ffff88806ce099e0 R8 =ffffffff860d1670 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffffffff85db8af4 R13=ffffffff85db8aec R14=ffffffff85db8af0 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000256 [---ZAP-] 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 00007f476a95a900 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=00007f476af11618 CR3=000000001a28e000 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=2034333a32313a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a32313a3230203032 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007f97eaea2a60 CR3=000000000d77c000 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=9a0c102d27609fa7eb4178f144d27ba0 XMM02=2c67c8bc2e329bc3000000000011c968 XMM03=fb795ef6d657705600000000001237b8 XMM04=77d88c43f4f3eea700000000000ae988 XMM05=19e9129bd510f2350000000000133358 XMM06=ce4ec808f58bdaf30000000000132260 XMM07=e042d86d42eb936e0000000000123a38 XMM08=e687920de5c72857000000000011c9c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000