syzkaller login: [ 31.575524] BUG: Bad rss-counter state mm:000000000a72b139 type:MM_FILEPAGES val:33 [ 31.576973] BUG: Bad rss-counter state mm:000000000a72b139 type:MM_ANONPAGES val:22 [ 31.727615] ================================================================== [ 31.728512] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.729453] Read of size 8 at addr ffff88800e3d14e0 by task sshd/220 [ 31.730221] [ 31.730450] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.731449] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.732474] Call Trace: [ 31.732846] [ 31.733137] dump_stack_lvl+0x91/0xf0 [ 31.733641] print_report+0xcc/0x620 [ 31.734145] ? __virt_addr_valid+0x102/0x340 [ 31.734719] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.735363] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.736006] kasan_report+0xbe/0xf0 [ 31.736500] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.737164] vma_interval_tree_remove+0xc75/0xec0 [ 31.737795] vma_prepare+0xc54/0x11a0 [ 31.738308] __split_vma+0x5af/0x950 [ 31.738805] ? __pfx___split_vma+0x10/0x10 [ 31.739357] ? find_held_lock+0x2c/0x110 [ 31.739901] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.740493] ? lock_is_held_type+0x9f/0x120 [ 31.741079] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.741710] ? mtree_range_walk+0x632/0x900 [ 31.742288] ? mas_walk+0x5c7/0x7c0 [ 31.742783] do_vmi_munmap+0x1f1/0x2b0 [ 31.743298] mmap_region+0x1f9/0x2660 [ 31.743802] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.744339] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.745097] ? __pfx_lock_acquire+0x10/0x10 [ 31.745668] ? __pfx_mmap_region+0x10/0x10 [ 31.746228] ? security_mmap_addr+0x7d/0xa0 [ 31.746791] ? get_unmapped_area+0x1f5/0x3f0 [ 31.747355] do_mmap+0x854/0xf00 [ 31.747795] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.748299] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.748872] ksys_mmap_pgoff+0x3af/0x500 [ 31.749389] do_syscall_64+0x3f/0x90 [ 31.749871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.750517] RIP: 0033:0x7fede2f4fd82 [ 31.750976] 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 [ 31.753134] RSP: 002b:00007fffb67645e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.754048] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fede2f4fd82 [ 31.754909] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fede2389000 [ 31.755776] RBP: 00007fede2389000 R08: 0000000000000009 R09: 0000000000001000 [ 31.756636] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614be8c9ec0 [ 31.757495] R13: 00007fffb6764600 R14: 00007fffb6764630 R15: 00007fffb6764990 [ 31.758360] [ 31.758651] [ 31.758878] Allocated by task 213: [ 31.759304] kasan_save_stack+0x22/0x50 [ 31.759816] kasan_set_track+0x25/0x30 [ 31.760306] __kasan_slab_alloc+0x59/0x70 [ 31.760850] kmem_cache_alloc+0x16b/0x370 [ 31.761360] vm_area_dup+0x20/0x160 [ 31.761817] __split_vma+0x170/0x950 [ 31.762285] split_vma+0xc6/0x110 [ 31.762726] mprotect_fixup+0x8d2/0xb30 [ 31.763232] do_mprotect_pkey+0x87e/0xd40 [ 31.763751] __x64_sys_mprotect+0x78/0xc0 [ 31.764273] do_syscall_64+0x3f/0x90 [ 31.764767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.765425] [ 31.765640] Freed by task 213: [ 31.766029] kasan_save_stack+0x22/0x50 [ 31.766530] kasan_set_track+0x25/0x30 [ 31.767028] kasan_save_free_info+0x2b/0x50 [ 31.767559] __kasan_slab_free+0x10a/0x190 [ 31.768087] kmem_cache_free+0x10d/0x4d0 [ 31.768608] rcu_core+0x8c8/0x2860 [ 31.769049] __do_softirq+0x1b7/0x7d4 [ 31.769531] [ 31.769749] Last potentially related work creation: [ 31.770336] kasan_save_stack+0x22/0x50 [ 31.770840] __kasan_record_aux_stack+0x8e/0xa0 [ 31.771408] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.772048] remove_vma+0x139/0x170 [ 31.772504] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.773077] do_vmi_munmap+0x1f1/0x2b0 [ 31.773567] __vm_munmap+0x138/0x3a0 [ 31.774036] __x64_sys_munmap+0x59/0x80 [ 31.774530] do_syscall_64+0x3f/0x90 [ 31.775012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.775653] [ 31.775867] The buggy address belongs to the object at ffff88800e3d1488 [ 31.775867] which belongs to the cache vm_area_struct of size 168 [ 31.777333] The buggy address is located 88 bytes inside of [ 31.777333] freed 168-byte region [ffff88800e3d1488, ffff88800e3d1530) [ 31.778741] [ 31.778957] The buggy address belongs to the physical page: [ 31.779633] page:000000000025a592 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3d1 [ 31.780731] memcg:ffff88800f473001 [ 31.781157] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.781801] page_type: 0xffffffff() [ 31.782261] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.783170] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f473001 [ 31.784081] page dumped because: kasan: bad access detected [ 31.784745] [ 31.784966] Memory state around the buggy address: [ 31.785545] ffff88800e3d1380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.786395] ffff88800e3d1400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.787254] >ffff88800e3d1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.788100] ^ [ 31.788866] ffff88800e3d1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.789773] ffff88800e3d1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.790636] ================================================================== [ 31.791611] Disabling lock debugging due to kernel taint [ 33.716602] BUG: Bad rss-counter state mm:00000000b3588fa9 type:MM_FILEPAGES val:33 [ 33.717612] BUG: Bad rss-counter state mm:00000000b3588fa9 type:MM_ANONPAGES val:22 [ 34.202258] BUG: Bad rss-counter state mm:00000000b73742a8 type:MM_FILEPAGES val:33 [ 34.203479] BUG: Bad rss-counter state mm:00000000b73742a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28834' (ECDSA) to the list of known hosts. 2023/06/21 06:42:40 fuzzer started 2023/06/21 06:42:40 dialing manager at localhost:36067 2023/06/21 06:42:40 checking machine... 2023/06/21 06:42:40 checking revisions... [ 34.895742] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:42:40 testing simple program... [ 34.945550] cgroup: Unknown subsys name 'net' [ 35.009776] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:42:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801429b540 RCX=1ffff1100d9c745c RDX=1ffff1100d9c7475 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000200 RSP=ffff888015a5f7f8 R8 =ffffffff85616740 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff8180fea4 RFL=00000056 [---ZAP-] 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 00007f6b5bfff700 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=00007f022146c0b0 CR3=000000000dad6000 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=2039333a32343a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a32343a3630203132 XMM08=5f6d65747379733d6a62757320353932 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=00007f8a59f48000 CR3=000000000ca2a000 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=11b05948713fcb98b64aeef61a93da1e XMM02=2c67c8bc2e329bc3000000000011c370 XMM03=fb795ef6d65770560000000000122c70 XMM04=b0c1a408e09d14f200000000000ae988 XMM05=19e9129bd510f2350000000000132a48 XMM06=b5c649764d4f611b00000000001318b0 XMM07=e042d86d42eb936e0000000000122ef0 XMM08=e7f9655995300997000000000011c3d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000