syzkaller login: [ 38.639685] BUG: Bad rss-counter state mm:00000000c3a98d60 type:MM_FILEPAGES val:33 [ 38.641773] BUG: Bad rss-counter state mm:00000000c3a98d60 type:MM_ANONPAGES val:22 [ 38.809098] ================================================================== [ 38.809989] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.810893] Read of size 8 at addr ffff88800d6a9df0 by task sshd/219 [ 38.811643] [ 38.811868] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.812770] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.813862] Call Trace: [ 38.814187] [ 38.814472] dump_stack_lvl+0x91/0xf0 [ 38.814969] print_report+0xcc/0x620 [ 38.815450] ? __virt_addr_valid+0x102/0x340 [ 38.816046] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.816673] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.817297] kasan_report+0xbe/0xf0 [ 38.817784] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.818417] vma_interval_tree_remove+0xc75/0xec0 [ 38.819016] vma_prepare+0xc54/0x11a0 [ 38.819496] __split_vma+0x5af/0x950 [ 38.819985] ? __pfx___split_vma+0x10/0x10 [ 38.820516] ? find_held_lock+0x2c/0x110 [ 38.821037] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.821607] ? lock_is_held_type+0x9f/0x120 [ 38.822146] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.822750] ? mtree_range_walk+0x632/0x900 [ 38.823300] ? mas_walk+0x5c7/0x7c0 [ 38.823785] do_vmi_munmap+0x1f1/0x2b0 [ 38.824277] mmap_region+0x1f9/0x2660 [ 38.824758] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.825268] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.825981] ? __pfx_lock_acquire+0x10/0x10 [ 38.826522] ? __pfx_mmap_region+0x10/0x10 [ 38.827060] ? security_mmap_addr+0x7d/0xa0 [ 38.827595] ? get_unmapped_area+0x1f5/0x3f0 [ 38.828172] do_mmap+0x854/0xf00 [ 38.828612] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.829111] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.829687] ksys_mmap_pgoff+0x3af/0x500 [ 38.830201] do_syscall_64+0x3f/0x90 [ 38.830682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.831430] RIP: 0033:0x7fde9ee5cd82 [ 38.831882] 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 [ 38.833958] RSP: 002b:00007fffdd3fff08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.834836] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde9ee5cd82 [ 38.835681] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde9e296000 [ 38.836511] RBP: 00007fde9e296000 R08: 0000000000000009 R09: 0000000000001000 [ 38.837338] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dbc2f25d90 [ 38.838163] R13: 00007fffdd3fff20 R14: 00007fffdd3fff50 R15: 00007fffdd4002b0 [ 38.839006] [ 38.839293] [ 38.839506] Allocated by task 212: [ 38.839931] kasan_save_stack+0x22/0x50 [ 38.840424] kasan_set_track+0x25/0x30 [ 38.840911] __kasan_slab_alloc+0x59/0x70 [ 38.841427] kmem_cache_alloc+0x16b/0x370 [ 38.841934] vm_area_dup+0x20/0x160 [ 38.842378] __split_vma+0x170/0x950 [ 38.842845] split_vma+0xc6/0x110 [ 38.843274] mprotect_fixup+0x8d2/0xb30 [ 38.843769] do_mprotect_pkey+0x87e/0xd40 [ 38.844279] __x64_sys_mprotect+0x78/0xc0 [ 38.844792] do_syscall_64+0x3f/0x90 [ 38.845258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.845887] [ 38.846100] Freed by task 212: [ 38.846482] kasan_save_stack+0x22/0x50 [ 38.846977] kasan_set_track+0x25/0x30 [ 38.847458] kasan_save_free_info+0x2b/0x50 [ 38.847992] __kasan_slab_free+0x10a/0x190 [ 38.848515] kmem_cache_free+0x10d/0x4d0 [ 38.849013] rcu_core+0x8c8/0x2860 [ 38.849450] __do_softirq+0x1b7/0x7d4 [ 38.849919] [ 38.850130] Last potentially related work creation: [ 38.850703] kasan_save_stack+0x22/0x50 [ 38.851199] __kasan_record_aux_stack+0x8e/0xa0 [ 38.851766] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.852396] remove_vma+0x139/0x170 [ 38.852836] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.853383] do_vmi_munmap+0x1f1/0x2b0 [ 38.853860] __vm_munmap+0x138/0x3a0 [ 38.854319] __x64_sys_munmap+0x59/0x80 [ 38.854807] do_syscall_64+0x3f/0x90 [ 38.855269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.855961] [ 38.856173] Second to last potentially related work creation: [ 38.856840] kasan_save_stack+0x22/0x50 [ 38.857333] __kasan_record_aux_stack+0x8e/0xa0 [ 38.857898] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.858530] remove_vma+0x139/0x170 [ 38.858982] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.859546] do_vmi_munmap+0x1f1/0x2b0 [ 38.860032] mmap_region+0x1f9/0x2660 [ 38.860509] do_mmap+0x854/0xf00 [ 38.860939] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.861419] ksys_mmap_pgoff+0x3af/0x500 [ 38.861930] do_syscall_64+0x3f/0x90 [ 38.862399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.863037] [ 38.863251] The buggy address belongs to the object at ffff88800d6a9d98 [ 38.863251] which belongs to the cache vm_area_struct of size 168 [ 38.864704] The buggy address is located 88 bytes inside of [ 38.864704] freed 168-byte region [ffff88800d6a9d98, ffff88800d6a9e40) [ 38.866082] [ 38.866297] The buggy address belongs to the physical page: [ 38.866951] page:0000000087c5718e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6a9 [ 38.868034] memcg:ffff88800d3c0801 [ 38.868455] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.869091] page_type: 0xffffffff() [ 38.869536] raw: 0100000000000200 ffff8880087a0c80 ffffea000036e140 dead000000000004 [ 38.870447] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3c0801 [ 38.871340] page dumped because: kasan: bad access detected [ 38.871997] [ 38.872213] Memory state around the buggy address: [ 38.872786] ffff88800d6a9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.873648] ffff88800d6a9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.874474] >ffff88800d6a9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.875303] ^ [ 38.876120] ffff88800d6a9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.876977] ffff88800d6a9e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.877822] ================================================================== [ 38.878878] Disabling lock debugging due to kernel taint [ 41.232330] BUG: Bad rss-counter state mm:00000000fbdab5b9 type:MM_FILEPAGES val:33 [ 41.233583] BUG: Bad rss-counter state mm:00000000fbdab5b9 type:MM_ANONPAGES val:22 [ 41.626912] BUG: Bad rss-counter state mm:00000000b049fb89 type:MM_FILEPAGES val:33 [ 41.628083] BUG: Bad rss-counter state mm:00000000b049fb89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58857' (ECDSA) to the list of known hosts. 2023/06/21 01:50:02 fuzzer started 2023/06/21 01:50:02 dialing manager at localhost:36067 2023/06/21 01:50:02 checking machine... 2023/06/21 01:50:02 checking revisions... [ 42.397739] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:50:02 testing simple program... [ 42.450480] cgroup: Unknown subsys name 'net' [ 42.527563] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:50:02 Registers: info registers vcpu 0 RAX=a2050c7f60a4a100 RBX=00007ffc90168350 RCX=000000000000001e RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=00007ffc90168590 RSP=00007ffc90168100 R8 =0000000000000007 R9 =0000000000000001 R10=0000000000000017 R11=000055eab04cc290 R12=0000000000000000 R13=0000000000000000 R14=0000000000000053 R15=0000000000000005 RIP=000055eab04637c5 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f19a1074900 00000000 00000000 GS =0000 0000000000000000 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=00007f19a04b2990 CR3=000000000d668000 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=7e8a42789393c4b7000000000011acf0 XMM01=0e930a47a0460bb687468d7174cd00c9 XMM02=2c67c8bc2e329bc3000000000011b030 XMM03=fb795ef6d657705600000000001219d0 XMM04=05614d0a389f912700000000000ae988 XMM05=dfcdbad4f1609c3700000000001328d8 XMM06=d79363699b47358d0000000000131ab0 XMM07=e042d86d42eb936e0000000000121ca8 XMM08=338af8a25f172519000000000011b090 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c04400 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=00007fffd57695e8 CR3=000000001a0a4000 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=2031303a30353a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a30353a3130203132 XMM08=64696720303d64697520612f6e3d6469 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000