syzkaller login: [ 30.558405] BUG: Bad rss-counter state mm:0000000064f625e3 type:MM_FILEPAGES val:33 [ 30.560647] BUG: Bad rss-counter state mm:0000000064f625e3 type:MM_ANONPAGES val:22 [ 30.725910] ================================================================== [ 30.726823] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.727767] Read of size 8 at addr ffff88800ea9b310 by task sshd/220 [ 30.728531] [ 30.728833] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.729722] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.730690] Call Trace: [ 30.731026] [ 30.731316] dump_stack_lvl+0x91/0xf0 [ 30.731810] print_report+0xcc/0x620 [ 30.732297] ? __virt_addr_valid+0x102/0x340 [ 30.732847] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.733464] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.734091] kasan_report+0xbe/0xf0 [ 30.734566] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.735189] vma_interval_tree_remove+0xc75/0xec0 [ 30.735794] vma_prepare+0xc54/0x11a0 [ 30.736274] __split_vma+0x5af/0x950 [ 30.736747] ? __pfx___split_vma+0x10/0x10 [ 30.737275] ? find_held_lock+0x2c/0x110 [ 30.737805] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.738375] ? lock_is_held_type+0x9f/0x120 [ 30.738908] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.739528] ? mtree_range_walk+0x632/0x900 [ 30.740083] ? mas_walk+0x5c7/0x7c0 [ 30.740556] do_vmi_munmap+0x1f1/0x2b0 [ 30.741049] mmap_region+0x1f9/0x2660 [ 30.741553] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.742086] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.742864] ? __pfx_lock_acquire+0x10/0x10 [ 30.743413] ? __pfx_mmap_region+0x10/0x10 [ 30.743941] ? security_mmap_addr+0x7d/0xa0 [ 30.744478] ? get_unmapped_area+0x1f5/0x3f0 [ 30.745032] do_mmap+0x854/0xf00 [ 30.745467] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.745972] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.746533] ksys_mmap_pgoff+0x3af/0x500 [ 30.747041] do_syscall_64+0x3f/0x90 [ 30.747521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.748170] RIP: 0033:0x7f42439c4d82 [ 30.748632] 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 [ 30.750826] RSP: 002b:00007fff72b47e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.751742] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42439c4d82 [ 30.752615] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4242dfe000 [ 30.753480] RBP: 00007f4242dfe000 R08: 0000000000000009 R09: 0000000000001000 [ 30.754363] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b564e0aec0 [ 30.755213] R13: 00007fff72b47e70 R14: 00007fff72b47ea0 R15: 00007fff72b48200 [ 30.756098] [ 30.756392] [ 30.756615] Allocated by task 213: [ 30.757057] kasan_save_stack+0x22/0x50 [ 30.757570] kasan_set_track+0x25/0x30 [ 30.758094] __kasan_slab_alloc+0x59/0x70 [ 30.758625] kmem_cache_alloc+0x16b/0x370 [ 30.759143] vm_area_dup+0x20/0x160 [ 30.759608] __split_vma+0x170/0x950 [ 30.760083] split_vma+0xc6/0x110 [ 30.760535] mprotect_fixup+0x8d2/0xb30 [ 30.761043] do_mprotect_pkey+0x87e/0xd40 [ 30.761576] __x64_sys_mprotect+0x78/0xc0 [ 30.762136] do_syscall_64+0x3f/0x90 [ 30.762622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.763281] [ 30.763501] Freed by task 213: [ 30.763898] kasan_save_stack+0x22/0x50 [ 30.764416] kasan_set_track+0x25/0x30 [ 30.764921] kasan_save_free_info+0x2b/0x50 [ 30.765465] __kasan_slab_free+0x10a/0x190 [ 30.766019] kmem_cache_free+0x10d/0x4d0 [ 30.766544] rcu_core+0x8c8/0x2860 [ 30.766993] __do_softirq+0x1b7/0x7d4 [ 30.767481] [ 30.767702] Last potentially related work creation: [ 30.768304] kasan_save_stack+0x22/0x50 [ 30.768815] __kasan_record_aux_stack+0x8e/0xa0 [ 30.769408] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.770073] remove_vma+0x139/0x170 [ 30.770533] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.771100] do_vmi_munmap+0x1f1/0x2b0 [ 30.771597] __vm_munmap+0x138/0x3a0 [ 30.772074] __x64_sys_munmap+0x59/0x80 [ 30.772579] do_syscall_64+0x3f/0x90 [ 30.773066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.773737] [ 30.773957] The buggy address belongs to the object at ffff88800ea9b2b8 [ 30.773957] which belongs to the cache vm_area_struct of size 168 [ 30.775453] The buggy address is located 88 bytes inside of [ 30.775453] freed 168-byte region [ffff88800ea9b2b8, ffff88800ea9b360) [ 30.776883] [ 30.777102] The buggy address belongs to the physical page: [ 30.777786] page:0000000015778069 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea9b [ 30.778876] memcg:ffff88800d716401 [ 30.779313] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.779965] page_type: 0xffffffff() [ 30.780421] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.781353] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d716401 [ 30.782281] page dumped because: kasan: bad access detected [ 30.782952] [ 30.783175] Memory state around the buggy address: [ 30.783759] ffff88800ea9b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.784625] ffff88800ea9b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.785494] >ffff88800ea9b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.786363] ^ [ 30.786837] ffff88800ea9b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.787703] ffff88800ea9b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.788558] ================================================================== [ 30.789574] Disabling lock debugging due to kernel taint [ 32.791206] BUG: Bad rss-counter state mm:000000001f1ef8f7 type:MM_FILEPAGES val:33 [ 32.792202] BUG: Bad rss-counter state mm:000000001f1ef8f7 type:MM_ANONPAGES val:22 [ 33.278569] BUG: Bad rss-counter state mm:00000000b00170c8 type:MM_FILEPAGES val:33 [ 33.279934] BUG: Bad rss-counter state mm:00000000b00170c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19214' (ECDSA) to the list of known hosts. 2023/06/20 11:10:32 fuzzer started 2023/06/20 11:10:32 dialing manager at localhost:36067 2023/06/20 11:10:32 checking machine... 2023/06/20 11:10:32 checking revisions... [ 34.040903] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:10:32 testing simple program... [ 34.087196] cgroup: Unknown subsys name 'net' [ 34.213356] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:10:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fe9f67ed010 CR3=000000000cba6000 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=eac5c0320aead29c154ad701b88a3ba8 XMM02=ec2efd57dc4c00df000000000011a0a8 XMM03=b48b7647ba134950000000000011a178 XMM04=d626433245f194cc00000000000ae988 XMM05=9f11241b0544048d0000000000132268 XMM06=4fda316b135da52b0000000000131308 XMM07=e042d86d42eb936e00000000001218d8 XMM08=b48b7647ba134950000000000011a178 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008e37d48 RCX=0000000000000001 RDX=1ffff110011c6f2d RSI=ffff888008e37d38 RDI=ffff888008e37968 RBP=ffff888008e30000 RSP=ffff888008e378e8 R8 =0000000000000001 R9 =ffff888008e37998 R10=0000000000038001 R11=00000000000244d5 R12=ffff888008e379b8 R13=ffff888008e379a0 R14=ffff888008e37d38 R15=ffff888008e37958 RIP=ffffffff81131cac 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 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=00007f420d32f618 CR3=0000000018300000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000