syzkaller login: [ 32.642532] BUG: Bad rss-counter state mm:00000000ba3e69a7 type:MM_FILEPAGES val:33 [ 32.643893] BUG: Bad rss-counter state mm:00000000ba3e69a7 type:MM_ANONPAGES val:22 [ 32.816687] ================================================================== [ 32.817635] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.818676] Read of size 8 at addr ffff888019db7d08 by task sshd/220 [ 32.819459] [ 32.819676] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.820546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.821548] Call Trace: [ 32.821867] [ 32.822155] dump_stack_lvl+0x91/0xf0 [ 32.822649] print_report+0xcc/0x620 [ 32.823133] ? __virt_addr_valid+0x102/0x340 [ 32.823695] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.824330] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.824978] kasan_report+0xbe/0xf0 [ 32.825463] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.826090] vma_interval_tree_remove+0xc75/0xec0 [ 32.826697] vma_prepare+0xc54/0x11a0 [ 32.827194] __split_vma+0x5af/0x950 [ 32.827671] ? __pfx___split_vma+0x10/0x10 [ 32.828204] ? find_held_lock+0x2c/0x110 [ 32.828736] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.829303] ? lock_is_held_type+0x9f/0x120 [ 32.829847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.830456] ? mtree_range_walk+0x632/0x900 [ 32.831010] ? mas_walk+0x5c7/0x7c0 [ 32.831493] do_vmi_munmap+0x1f1/0x2b0 [ 32.831992] mmap_region+0x1f9/0x2660 [ 32.832490] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.833005] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.833728] ? __pfx_lock_acquire+0x10/0x10 [ 32.834274] ? __pfx_mmap_region+0x10/0x10 [ 32.834810] ? security_mmap_addr+0x7d/0xa0 [ 32.835354] ? get_unmapped_area+0x1f5/0x3f0 [ 32.835907] do_mmap+0x854/0xf00 [ 32.836353] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.836873] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.837447] ksys_mmap_pgoff+0x3af/0x500 [ 32.837954] do_syscall_64+0x3f/0x90 [ 32.838440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.839089] RIP: 0033:0x7f7b95fecd82 [ 32.839552] 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 [ 32.841692] RSP: 002b:00007ffe787e45a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.842605] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b95fecd82 [ 32.843456] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b95426000 [ 32.844304] RBP: 00007f7b95426000 R08: 0000000000000009 R09: 0000000000001000 [ 32.845162] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e7e8a7eec0 [ 32.846009] R13: 00007ffe787e45c0 R14: 00007ffe787e45f0 R15: 00007ffe787e4950 [ 32.846877] [ 32.847184] [ 32.847400] Allocated by task 213: [ 32.847833] kasan_save_stack+0x22/0x50 [ 32.848346] kasan_set_track+0x25/0x30 [ 32.848864] __kasan_slab_alloc+0x59/0x70 [ 32.849395] kmem_cache_alloc+0x16b/0x370 [ 32.849910] vm_area_dup+0x20/0x160 [ 32.850370] __split_vma+0x170/0x950 [ 32.850840] split_vma+0xc6/0x110 [ 32.851282] mprotect_fixup+0x8d2/0xb30 [ 32.851782] do_mprotect_pkey+0x87e/0xd40 [ 32.852302] __x64_sys_mprotect+0x78/0xc0 [ 32.852831] do_syscall_64+0x3f/0x90 [ 32.853303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.853945] [ 32.854162] Freed by task 203: [ 32.854559] kasan_save_stack+0x22/0x50 [ 32.855061] kasan_set_track+0x25/0x30 [ 32.855557] kasan_save_free_info+0x2b/0x50 [ 32.856096] __kasan_slab_free+0x10a/0x190 [ 32.856642] kmem_cache_free+0x10d/0x4d0 [ 32.857153] rcu_core+0x8c8/0x2860 [ 32.857599] __do_softirq+0x1b7/0x7d4 [ 32.858084] [ 32.858301] Last potentially related work creation: [ 32.858891] kasan_save_stack+0x22/0x50 [ 32.859402] __kasan_record_aux_stack+0x8e/0xa0 [ 32.859982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.860647] remove_vma+0x139/0x170 [ 32.861098] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.861658] do_vmi_munmap+0x1f1/0x2b0 [ 32.862149] __vm_munmap+0x138/0x3a0 [ 32.862619] __x64_sys_munmap+0x59/0x80 [ 32.863114] do_syscall_64+0x3f/0x90 [ 32.863590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.864230] [ 32.864456] The buggy address belongs to the object at ffff888019db7cb0 [ 32.864456] which belongs to the cache vm_area_struct of size 168 [ 32.865918] The buggy address is located 88 bytes inside of [ 32.865918] freed 168-byte region [ffff888019db7cb0, ffff888019db7d58) [ 32.867323] [ 32.867541] The buggy address belongs to the physical page: [ 32.868195] page:0000000023fb561d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19db7 [ 32.869301] memcg:ffff88801ab50b01 [ 32.869736] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.870389] page_type: 0xffffffff() [ 32.870838] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.871756] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801ab50b01 [ 32.872673] page dumped because: kasan: bad access detected [ 32.873335] [ 32.873559] Memory state around the buggy address: [ 32.874145] ffff888019db7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.874999] ffff888019db7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.875866] >ffff888019db7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.876739] ^ [ 32.877181] ffff888019db7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.878032] ffff888019db7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.878869] ================================================================== [ 32.879839] Disabling lock debugging due to kernel taint [ 35.132815] BUG: Bad rss-counter state mm:0000000048c90f83 type:MM_FILEPAGES val:33 [ 35.134107] BUG: Bad rss-counter state mm:0000000048c90f83 type:MM_ANONPAGES val:22 [ 35.539423] BUG: Bad rss-counter state mm:00000000718b7428 type:MM_FILEPAGES val:33 [ 35.540401] BUG: Bad rss-counter state mm:00000000718b7428 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39660' (ECDSA) to the list of known hosts. 2023/06/20 01:41:14 fuzzer started 2023/06/20 01:41:15 dialing manager at localhost:44161 2023/06/20 01:41:15 checking machine... 2023/06/20 01:41:15 checking revisions... [ 36.221546] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:41:15 testing simple program... [ 36.281146] cgroup: Unknown subsys name 'net' [ 36.320551] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:41:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fe6fe2d5840 CR3=000000000c5d6000 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=8aab9c7a6b007b803f4ab74317e54431 XMM02=000000000011da80ec2efd57dc4c00df XMM03=0000000000124c30d596f0fbd14f36fd XMM04=e244cdfff4ad135900000000000ae988 XMM05=e4cb8bb95a7664b600000000001347b0 XMM06=a66a491578903f6b0000000000133618 XMM07=e042d86d42eb936e0000000000124eb0 XMM08=d596f0fbd14f36fd000000000011dae0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f500973e618 CR3=000000001592c000 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=2034313a31343a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a31343a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000