syzkaller login: [ 48.536826] BUG: Bad rss-counter state mm:000000000e121ab3 type:MM_FILEPAGES val:33 [ 48.538068] BUG: Bad rss-counter state mm:000000000e121ab3 type:MM_ANONPAGES val:22 [ 48.710170] ================================================================== [ 48.711090] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.712018] Read of size 8 at addr ffff88800f1c7228 by task sshd/219 [ 48.712877] [ 48.713095] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.713968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.714962] Call Trace: [ 48.715284] [ 48.715563] dump_stack_lvl+0x91/0xf0 [ 48.716051] print_report+0xcc/0x620 [ 48.716535] ? __virt_addr_valid+0x102/0x340 [ 48.717089] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.717733] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.718346] kasan_report+0xbe/0xf0 [ 48.718818] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.719442] vma_interval_tree_remove+0xc75/0xec0 [ 48.720043] vma_prepare+0xc54/0x11a0 [ 48.720521] __split_vma+0x5af/0x950 [ 48.720991] ? __pfx___split_vma+0x10/0x10 [ 48.721517] ? find_held_lock+0x2c/0x110 [ 48.722048] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.722627] ? lock_is_held_type+0x9f/0x120 [ 48.723178] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.723820] ? mtree_range_walk+0x632/0x900 [ 48.724404] ? mas_walk+0x5c7/0x7c0 [ 48.724897] do_vmi_munmap+0x1f1/0x2b0 [ 48.725398] mmap_region+0x1f9/0x2660 [ 48.725928] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.726472] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.727229] ? __pfx_lock_acquire+0x10/0x10 [ 48.727799] ? __pfx_mmap_region+0x10/0x10 [ 48.728369] ? security_mmap_addr+0x7d/0xa0 [ 48.728930] ? get_unmapped_area+0x1f5/0x3f0 [ 48.729514] do_mmap+0x854/0xf00 [ 48.730004] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.730535] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.731131] ksys_mmap_pgoff+0x3af/0x500 [ 48.731678] do_syscall_64+0x3f/0x90 [ 48.732187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.732874] RIP: 0033:0x7fc223da2d82 [ 48.733369] 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 [ 48.735662] RSP: 002b:00007ffd1fe6ab38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.736629] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc223da2d82 [ 48.737541] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc2231dc000 [ 48.738470] RBP: 00007fc2231dc000 R08: 0000000000000009 R09: 0000000000001000 [ 48.739382] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558dbb2a8980 [ 48.740284] R13: 00007ffd1fe6ab50 R14: 00007ffd1fe6ab80 R15: 00007ffd1fe6aee0 [ 48.741196] [ 48.741508] [ 48.741740] Allocated by task 212: [ 48.742194] kasan_save_stack+0x22/0x50 [ 48.742728] kasan_set_track+0x25/0x30 [ 48.743258] __kasan_slab_alloc+0x59/0x70 [ 48.743816] kmem_cache_alloc+0x16b/0x370 [ 48.744369] vm_area_dup+0x20/0x160 [ 48.744855] __split_vma+0x170/0x950 [ 48.745352] split_vma+0xc6/0x110 [ 48.745841] mprotect_fixup+0x8d2/0xb30 [ 48.746387] do_mprotect_pkey+0x87e/0xd40 [ 48.746944] __x64_sys_mprotect+0x78/0xc0 [ 48.747506] do_syscall_64+0x3f/0x90 [ 48.748007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.748694] [ 48.748921] Freed by task 212: [ 48.749344] kasan_save_stack+0x22/0x50 [ 48.749891] kasan_set_track+0x25/0x30 [ 48.750425] kasan_save_free_info+0x2b/0x50 [ 48.750998] __kasan_slab_free+0x10a/0x190 [ 48.751568] kmem_cache_free+0x10d/0x4d0 [ 48.752112] rcu_core+0x8c8/0x2860 [ 48.752584] __do_softirq+0x1b7/0x7d4 [ 48.753093] [ 48.753321] Last potentially related work creation: [ 48.753957] kasan_save_stack+0x22/0x50 [ 48.754497] __kasan_record_aux_stack+0x8e/0xa0 [ 48.755118] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.755811] remove_vma+0x139/0x170 [ 48.756293] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.756885] do_vmi_munmap+0x1f1/0x2b0 [ 48.757406] __vm_munmap+0x138/0x3a0 [ 48.757921] __x64_sys_munmap+0x59/0x80 [ 48.758448] do_syscall_64+0x3f/0x90 [ 48.758958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.759646] [ 48.759873] The buggy address belongs to the object at ffff88800f1c71d0 [ 48.759873] which belongs to the cache vm_area_struct of size 168 [ 48.761432] The buggy address is located 88 bytes inside of [ 48.761432] freed 168-byte region [ffff88800f1c71d0, ffff88800f1c7278) [ 48.762944] [ 48.763179] The buggy address belongs to the physical page: [ 48.763878] page:000000007cda6b9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1c7 [ 48.765037] memcg:ffff88800ed60201 [ 48.765494] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 48.766263] page_type: 0xffffffff() [ 48.766739] raw: 0100000000000200 ffff88800879fc80 ffffea0000343b80 dead000000000003 [ 48.767716] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed60201 [ 48.768686] page dumped because: kasan: bad access detected [ 48.769391] [ 48.769617] Memory state around the buggy address: [ 48.770252] ffff88800f1c7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.771161] ffff88800f1c7180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 48.772073] >ffff88800f1c7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 48.772980] ^ [ 48.773568] ffff88800f1c7280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 48.774506] ffff88800f1c7300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 48.775420] ================================================================== [ 48.776453] Disabling lock debugging due to kernel taint [ 50.831271] BUG: Bad rss-counter state mm:00000000ee4d6cbf type:MM_FILEPAGES val:33 [ 50.832842] BUG: Bad rss-counter state mm:00000000ee4d6cbf type:MM_ANONPAGES val:22 [ 51.231102] BUG: Bad rss-counter state mm:0000000099f8ed2a type:MM_FILEPAGES val:33 [ 51.232878] BUG: Bad rss-counter state mm:0000000099f8ed2a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60372' (ECDSA) to the list of known hosts. 2023/06/20 05:37:40 fuzzer started 2023/06/20 05:37:40 dialing manager at localhost:44161 2023/06/20 05:37:40 checking machine... 2023/06/20 05:37:40 checking revisions... [ 51.969955] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:37:40 testing simple program... [ 52.033160] cgroup: Unknown subsys name 'net' [ 52.091560] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:37:30 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=00007f82e3b14780 CR3=000000000c740000 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=23b9ef0350386fa7b24af5ac553b0fc2 XMM02=0000000000120698ec2efd57dc4c00df XMM03=00000000001259d025e831bc974be849 XMM04=a3d83d4332cd1afa00000000000ae988 XMM05=f5293e2e5a48034800000000001363c0 XMM06=806171799158d96700000000001350f0 XMM07=e042d86d42eb936e0000000000126410 XMM08=25e831bc974be84900000000001206f8 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=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=00007fa55ff3d618 CR3=000000000c674000 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=2030343a37333a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a37333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000