syzkaller login: [ 30.553646] BUG: Bad rss-counter state mm:00000000caf2af0f type:MM_FILEPAGES val:33 [ 30.555219] BUG: Bad rss-counter state mm:00000000caf2af0f type:MM_ANONPAGES val:22 [ 30.722244] ================================================================== [ 30.723362] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.724537] Read of size 8 at addr ffff888017f1f3f8 by task sshd/221 [ 30.725557] [ 30.725816] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.726894] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.727880] Call Trace: [ 30.728207] [ 30.728492] dump_stack_lvl+0x91/0xf0 [ 30.728987] print_report+0xcc/0x620 [ 30.729506] ? __virt_addr_valid+0x102/0x340 [ 30.730053] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.730672] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.731312] kasan_report+0xbe/0xf0 [ 30.731785] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.732412] vma_interval_tree_remove+0xc75/0xec0 [ 30.733021] vma_prepare+0xc54/0x11a0 [ 30.733541] __split_vma+0x5af/0x950 [ 30.734021] ? __pfx___split_vma+0x10/0x10 [ 30.734552] ? find_held_lock+0x2c/0x110 [ 30.735089] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.735653] ? lock_is_held_type+0x9f/0x120 [ 30.736193] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.736802] ? mtree_range_walk+0x632/0x900 [ 30.737362] ? mas_walk+0x5c7/0x7c0 [ 30.737878] do_vmi_munmap+0x1f1/0x2b0 [ 30.738374] mmap_region+0x1f9/0x2660 [ 30.738890] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.739407] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.740121] ? __pfx_lock_acquire+0x10/0x10 [ 30.740659] ? __pfx_mmap_region+0x10/0x10 [ 30.741187] ? security_mmap_addr+0x7d/0xa0 [ 30.741754] ? get_unmapped_area+0x1f5/0x3f0 [ 30.742308] do_mmap+0x854/0xf00 [ 30.742757] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.743255] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.743817] ksys_mmap_pgoff+0x3af/0x500 [ 30.744322] do_syscall_64+0x3f/0x90 [ 30.744805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.745478] RIP: 0033:0x7f02f1538d82 [ 30.745942] 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 [ 30.748100] RSP: 002b:00007ffd8505ce48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.749014] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02f1538d82 [ 30.749913] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02f0972000 [ 30.750804] RBP: 00007f02f0972000 R08: 0000000000000009 R09: 0000000000001000 [ 30.751659] R10: 0000000000000812 R11: 0000000000000206 R12: 000056112bec4ec0 [ 30.752531] R13: 00007ffd8505ce60 R14: 00007ffd8505ce90 R15: 00007ffd8505d1f0 [ 30.753413] [ 30.753704] [ 30.753919] Allocated by task 214: [ 30.754349] kasan_save_stack+0x22/0x50 [ 30.754876] kasan_set_track+0x25/0x30 [ 30.755377] __kasan_slab_alloc+0x59/0x70 [ 30.755897] kmem_cache_alloc+0x16b/0x370 [ 30.756425] vm_area_dup+0x20/0x160 [ 30.756903] __split_vma+0x170/0x950 [ 30.757372] split_vma+0xc6/0x110 [ 30.757806] mprotect_fixup+0x8d2/0xb30 [ 30.758307] do_mprotect_pkey+0x87e/0xd40 [ 30.758852] __x64_sys_mprotect+0x78/0xc0 [ 30.759374] do_syscall_64+0x3f/0x90 [ 30.759848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.760535] [ 30.760755] Freed by task 204: [ 30.761155] kasan_save_stack+0x22/0x50 [ 30.761661] kasan_set_track+0x25/0x30 [ 30.762154] kasan_save_free_info+0x2b/0x50 [ 30.762689] __kasan_slab_free+0x10a/0x190 [ 30.763244] kmem_cache_free+0x10d/0x4d0 [ 30.763755] rcu_core+0x8c8/0x2860 [ 30.764210] __do_softirq+0x1b7/0x7d4 [ 30.764736] [ 30.764950] Last potentially related work creation: [ 30.765527] kasan_save_stack+0x22/0x50 [ 30.766033] __kasan_record_aux_stack+0x8e/0xa0 [ 30.766613] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.767280] remove_vma+0x139/0x170 [ 30.767735] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.768299] do_vmi_munmap+0x1f1/0x2b0 [ 30.768818] __vm_munmap+0x138/0x3a0 [ 30.769291] __x64_sys_munmap+0x59/0x80 [ 30.769788] do_syscall_64+0x3f/0x90 [ 30.770266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.770933] [ 30.771150] The buggy address belongs to the object at ffff888017f1f3a0 [ 30.771150] which belongs to the cache vm_area_struct of size 168 [ 30.772664] The buggy address is located 88 bytes inside of [ 30.772664] freed 168-byte region [ffff888017f1f3a0, ffff888017f1f448) [ 30.774382] [ 30.774647] The buggy address belongs to the physical page: [ 30.775322] page:000000005b0dd11f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f1f [ 30.776447] memcg:ffff88800eff3201 [ 30.776878] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.777540] page_type: 0xffffffff() [ 30.777996] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.778940] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eff3201 [ 30.779876] page dumped because: kasan: bad access detected [ 30.780558] [ 30.780777] Memory state around the buggy address: [ 30.781369] ffff888017f1f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.782238] ffff888017f1f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.783120] >ffff888017f1f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.783994] ^ [ 30.784865] ffff888017f1f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.785742] ffff888017f1f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.786606] ================================================================== [ 30.787752] Disabling lock debugging due to kernel taint [ 33.487366] BUG: Bad rss-counter state mm:00000000f7830b5c type:MM_FILEPAGES val:33 [ 33.488550] BUG: Bad rss-counter state mm:00000000f7830b5c type:MM_ANONPAGES val:22 [ 34.021976] BUG: Bad rss-counter state mm:00000000769b6ae6 type:MM_FILEPAGES val:33 [ 34.023187] BUG: Bad rss-counter state mm:00000000769b6ae6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59875' (ECDSA) to the list of known hosts. 2023/06/21 01:34:10 fuzzer started 2023/06/21 01:34:10 dialing manager at localhost:36067 2023/06/21 01:34:10 checking machine... 2023/06/21 01:34:10 checking revisions... [ 34.661903] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:34:10 testing simple program... [ 34.707370] cgroup: Unknown subsys name 'net' [ 34.769669] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:34:10 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000246 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84535ffc RBP=ffffffff856d84a0 RSP=ffff88800f0ff7c8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888008fae280 R13=0000000000000000 R14=0000000000082cc0 R15=0000000000082cc0 RIP=ffffffff84536004 RFL=00000286 [--S--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 00007fd71a0c6900 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=00007ffd6c49d000 CR3=000000000e5da000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=00007ff2289826b0 CR3=000000000c7b8000 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=4d9c1b4058b8c6a93e4ac84fa3b39711 XMM02=ec2efd57dc4c00df0000000000119bd0 XMM03=4cd3b7f2523794f80000000000119ca0 XMM04=02709e156fe445e000000000000ae988 XMM05=52149dd2c0bc24d00000000000132188 XMM06=c291bd5c70af25b90000000000131228 XMM07=e042d86d42eb936e0000000000121730 XMM08=4cd3b7f2523794f80000000000119ca0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000