[ 27.070377] BUG: Bad rss-counter state mm:00000000c8a0f274 type:MM_FILEPAGES val:33 [ 27.071377] BUG: Bad rss-counter state mm:00000000c8a0f274 type:MM_ANONPAGES val:22 [ 27.230150] ================================================================== [ 27.231063] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.232023] Read of size 8 at addr ffff888014771a50 by task sshd/219 [ 27.232798] [ 27.233018] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.234051] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.235045] Call Trace: [ 27.235365] [ 27.235694] dump_stack_lvl+0x91/0xf0 [ 27.236180] print_report+0xcc/0x620 [ 27.236665] ? __virt_addr_valid+0x102/0x340 [ 27.237229] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.237852] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.238476] kasan_report+0xbe/0xf0 [ 27.238966] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.239604] vma_interval_tree_remove+0xc75/0xec0 [ 27.240205] vma_prepare+0xc54/0x11a0 [ 27.240683] __split_vma+0x5af/0x950 [ 27.241165] ? __pfx___split_vma+0x10/0x10 [ 27.241707] ? find_held_lock+0x2c/0x110 [ 27.242230] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.242796] ? lock_is_held_type+0x9f/0x120 [ 27.243332] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.243969] ? mtree_range_walk+0x632/0x900 [ 27.244526] ? mas_walk+0x5c7/0x7c0 [ 27.245002] do_vmi_munmap+0x1f1/0x2b0 [ 27.245501] mmap_region+0x1f9/0x2660 [ 27.245983] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.246495] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.247201] ? __pfx_lock_acquire+0x10/0x10 [ 27.247749] ? __pfx_mmap_region+0x10/0x10 [ 27.248274] ? security_mmap_addr+0x7d/0xa0 [ 27.248810] ? get_unmapped_area+0x1f5/0x3f0 [ 27.249354] do_mmap+0x854/0xf00 [ 27.249792] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.250286] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.250847] ksys_mmap_pgoff+0x3af/0x500 [ 27.251365] do_syscall_64+0x3f/0x90 [ 27.251849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.252496] RIP: 0033:0x7fb0fc5ecd82 [ 27.252954] 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 [ 27.255076] RSP: 002b:00007ffd73740668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.256000] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0fc5ecd82 [ 27.256850] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0fba26000 [ 27.257693] RBP: 00007fb0fba26000 R08: 0000000000000009 R09: 0000000000001000 [ 27.258538] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562695370f70 [ 27.259386] R13: 00007ffd73740680 R14: 00007ffd737406b0 R15: 00007ffd73740a10 [ 27.260245] [ 27.260538] [ 27.260766] Allocated by task 210: [ 27.261205] kasan_save_stack+0x22/0x50 [ 27.261717] kasan_set_track+0x25/0x30 [ 27.262212] __kasan_slab_alloc+0x59/0x70 [ 27.262733] kmem_cache_alloc+0x16b/0x370 [ 27.263254] vm_area_dup+0x20/0x160 [ 27.263732] __split_vma+0x170/0x950 [ 27.264191] split_vma+0xc6/0x110 [ 27.264639] mprotect_fixup+0x8d2/0xb30 [ 27.265139] do_mprotect_pkey+0x87e/0xd40 [ 27.265664] __x64_sys_mprotect+0x78/0xc0 [ 27.266188] do_syscall_64+0x3f/0x90 [ 27.266663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.267298] [ 27.267531] Freed by task 210: [ 27.267924] kasan_save_stack+0x22/0x50 [ 27.268431] kasan_set_track+0x25/0x30 [ 27.268926] kasan_save_free_info+0x2b/0x50 [ 27.269462] __kasan_slab_free+0x10a/0x190 [ 27.269998] kmem_cache_free+0x10d/0x4d0 [ 27.270506] rcu_core+0x8c8/0x2860 [ 27.270949] __do_softirq+0x1b7/0x7d4 [ 27.271445] [ 27.271667] Last potentially related work creation: [ 27.272252] kasan_save_stack+0x22/0x50 [ 27.272758] __kasan_record_aux_stack+0x8e/0xa0 [ 27.273329] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.273973] remove_vma+0x139/0x170 [ 27.274430] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.274985] do_vmi_munmap+0x1f1/0x2b0 [ 27.275494] __vm_munmap+0x138/0x3a0 [ 27.275965] __x64_sys_munmap+0x59/0x80 [ 27.276468] do_syscall_64+0x3f/0x90 [ 27.276943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.277582] [ 27.277806] The buggy address belongs to the object at ffff8880147719f8 [ 27.277806] which belongs to the cache vm_area_struct of size 168 [ 27.279299] The buggy address is located 88 bytes inside of [ 27.279299] freed 168-byte region [ffff8880147719f8, ffff888014771aa0) [ 27.280733] [ 27.280955] The buggy address belongs to the physical page: [ 27.281617] page:0000000091579f8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14771 [ 27.282715] memcg:ffff88800ff3ca01 [ 27.283145] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.283811] page_type: 0xffffffff() [ 27.284270] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 27.285194] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff3ca01 [ 27.286113] page dumped because: kasan: bad access detected [ 27.286797] [ 27.287018] Memory state around the buggy address: [ 27.287614] ffff888014771900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.288474] ffff888014771980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 27.289336] >ffff888014771a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.290199] ^ [ 27.290920] ffff888014771a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 27.291783] ffff888014771b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.292640] ================================================================== [ 27.293776] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.080472] BUG: Bad rss-counter state mm:00000000cf9fb389 type:MM_FILEPAGES val:33 [ 29.081154] BUG: Bad rss-counter state mm:00000000cf9fb389 type:MM_ANONPAGES val:22 [ 29.584352] BUG: Bad rss-counter state mm:000000003817a1f6 type:MM_FILEPAGES val:33 [ 29.585347] BUG: Bad rss-counter state mm:000000003817a1f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6329' (ECDSA) to the list of known hosts. 2023/06/20 00:36:15 fuzzer started 2023/06/20 00:36:15 dialing manager at localhost:44161 2023/06/20 00:36:15 checking machine... 2023/06/20 00:36:15 checking revisions... [ 30.323021] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:36:15 testing simple program... [ 30.381813] cgroup: Unknown subsys name 'net' [ 30.425186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:36:11 Registers: info registers vcpu 0 RAX=ffffffff81eff520 RBX=ffffffff852c79c8 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000002 RDI=ffff88800e7f0280 RBP=dffffc0000000000 RSP=ffff888009587ec8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=0000000000000002 R15=ffff88800e7f0280 RIP=ffffffff81eff524 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 00007f4b568ae900 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=00007f4b56e660b0 CR3=000000000e5a2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f3fb27c0da0 CR3=000000000dc7c000 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=2034313a36333a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a36333a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000