syzkaller login: [ 30.788349] BUG: Bad rss-counter state mm:00000000dfbd68d9 type:MM_FILEPAGES val:33 [ 30.789371] BUG: Bad rss-counter state mm:00000000dfbd68d9 type:MM_ANONPAGES val:22 [ 30.827941] ================================================================== [ 30.829051] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.830249] Read of size 8 at addr ffff88800ef234e0 by task sshd/220 [ 30.831071] [ 30.831311] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.832266] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.833322] Call Trace: [ 30.833718] [ 30.834031] dump_stack_lvl+0x91/0xf0 [ 30.834537] print_report+0xcc/0x620 [ 30.835042] ? __virt_addr_valid+0x102/0x340 [ 30.835658] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836306] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836996] kasan_report+0xbe/0xf0 [ 30.837510] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.838193] vma_interval_tree_remove+0xc75/0xec0 [ 30.838893] vma_prepare+0xc54/0x11a0 [ 30.839395] __split_vma+0x5af/0x950 [ 30.839879] ? __pfx___split_vma+0x10/0x10 [ 30.840477] ? find_held_lock+0x2c/0x110 [ 30.841045] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.841632] ? lock_is_held_type+0x9f/0x120 [ 30.842226] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.842906] ? mtree_range_walk+0x632/0x900 [ 30.843455] ? mas_walk+0x5c7/0x7c0 [ 30.844002] do_vmi_munmap+0x1f1/0x2b0 [ 30.844514] mmap_region+0x1f9/0x2660 [ 30.845054] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.845561] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.846335] ? __pfx_lock_acquire+0x10/0x10 [ 30.846912] ? __pfx_mmap_region+0x10/0x10 [ 30.847475] ? security_mmap_addr+0x7d/0xa0 [ 30.848064] ? get_unmapped_area+0x1f5/0x3f0 [ 30.848619] do_mmap+0x854/0xf00 [ 30.849117] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.849647] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.850240] ksys_mmap_pgoff+0x3af/0x500 [ 30.850763] do_syscall_64+0x3f/0x90 [ 30.851334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.851998] RIP: 0033:0x7f15635bcd82 [ 30.852474] 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 [ 30.854799] RSP: 002b:00007ffedd089968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.855725] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f15635bcd82 [ 30.856662] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15629f6000 [ 30.857550] RBP: 00007f15629f6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.858519] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559382cc5f70 [ 30.859433] R13: 00007ffedd089980 R14: 00007ffedd0899b0 R15: 00007ffedd089d10 [ 30.860385] [ 30.860667] [ 30.860904] Allocated by task 213: [ 30.861385] kasan_save_stack+0x22/0x50 [ 30.861956] kasan_set_track+0x25/0x30 [ 30.862501] __kasan_slab_alloc+0x59/0x70 [ 30.863067] kmem_cache_alloc+0x16b/0x370 [ 30.863676] vm_area_dup+0x20/0x160 [ 30.864158] __split_vma+0x170/0x950 [ 30.864655] split_vma+0xc6/0x110 [ 30.865178] mprotect_fixup+0x8d2/0xb30 [ 30.865710] do_mprotect_pkey+0x87e/0xd40 [ 30.866242] __x64_sys_mprotect+0x78/0xc0 [ 30.866852] do_syscall_64+0x3f/0x90 [ 30.867339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867999] [ 30.868214] Freed by task 210: [ 30.868646] kasan_save_stack+0x22/0x50 [ 30.869284] kasan_set_track+0x25/0x30 [ 30.869854] kasan_save_free_info+0x2b/0x50 [ 30.870431] __kasan_slab_free+0x10a/0x190 [ 30.871086] kmem_cache_free+0x10d/0x4d0 [ 30.871620] rcu_core+0x8c8/0x2860 [ 30.872131] __do_softirq+0x1b7/0x7d4 [ 30.872709] [ 30.873007] Last potentially related work creation: [ 30.873676] kasan_save_stack+0x22/0x50 [ 30.874270] __kasan_record_aux_stack+0x8e/0xa0 [ 30.874958] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.875722] remove_vma+0x139/0x170 [ 30.876239] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.876918] do_vmi_munmap+0x1f1/0x2b0 [ 30.877444] __vm_munmap+0x138/0x3a0 [ 30.877984] __x64_sys_munmap+0x59/0x80 [ 30.878525] do_syscall_64+0x3f/0x90 [ 30.879030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.879718] [ 30.879950] The buggy address belongs to the object at ffff88800ef23488 [ 30.879950] which belongs to the cache vm_area_struct of size 168 [ 30.881546] The buggy address is located 88 bytes inside of [ 30.881546] freed 168-byte region [ffff88800ef23488, ffff88800ef23530) [ 30.883099] [ 30.883348] The buggy address belongs to the physical page: [ 30.884057] page:000000001096e8cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef23 [ 30.885258] memcg:ffff88800c673701 [ 30.885718] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.886433] page_type: 0xffffffff() [ 30.886885] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.887793] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c673701 [ 30.888683] page dumped because: kasan: bad access detected [ 30.889335] [ 30.889543] Memory state around the buggy address: [ 30.890121] ffff88800ef23380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.890976] ffff88800ef23400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.891823] >ffff88800ef23480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.892663] ^ [ 30.893415] ffff88800ef23500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.894266] ffff88800ef23580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.895115] ================================================================== [ 30.896127] Disabling lock debugging due to kernel taint [ 32.766056] BUG: Bad rss-counter state mm:0000000040a8f457 type:MM_FILEPAGES val:33 [ 32.766926] BUG: Bad rss-counter state mm:0000000040a8f457 type:MM_ANONPAGES val:22 [ 33.298048] BUG: Bad rss-counter state mm:000000006edbd4fd type:MM_FILEPAGES val:33 [ 33.299192] BUG: Bad rss-counter state mm:000000006edbd4fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51958' (ECDSA) to the list of known hosts. 2023/06/21 02:22:06 fuzzer started 2023/06/21 02:22:07 dialing manager at localhost:36067 2023/06/21 02:22:07 checking machine... 2023/06/21 02:22:07 checking revisions... [ 33.936759] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:22:07 testing simple program... [ 33.986538] cgroup: Unknown subsys name 'net' [ 34.034358] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:22:06 Registers: info registers vcpu 0 RAX=1ffff11002de99b1 RBX=ffff888016f4cd78 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888016f4cd88 RBP=ffff88801a3b7730 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=1ffff1100d9c7479 R12=dffffc0000000000 R13=ffff88801a3b7398 R14=ffffffff813782f8 R15=ffff88801a3b7398 RIP=ffffffff818464c3 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2d3aa2c900 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=00007f2d3b59e31c CR3=000000001a25a000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007f107c8f0000 CR3=00000000182ca000 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=2036303a32323a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a32323a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000