syzkaller login: [ 30.301340] BUG: Bad rss-counter state mm:000000008b82ee64 type:MM_FILEPAGES val:33 [ 30.302577] BUG: Bad rss-counter state mm:000000008b82ee64 type:MM_ANONPAGES val:22 [ 30.339608] ================================================================== [ 30.340642] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.341596] Read of size 8 at addr ffff888019544140 by task sshd/219 [ 30.342442] [ 30.342686] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.343544] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.344527] Call Trace: [ 30.344849] [ 30.345136] dump_stack_lvl+0x91/0xf0 [ 30.345631] print_report+0xcc/0x620 [ 30.346109] ? __virt_addr_valid+0x102/0x340 [ 30.346675] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.347293] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.347914] kasan_report+0xbe/0xf0 [ 30.348385] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.349010] vma_interval_tree_remove+0xc75/0xec0 [ 30.349622] vma_prepare+0xc54/0x11a0 [ 30.350100] __split_vma+0x5af/0x950 [ 30.350594] ? __pfx___split_vma+0x10/0x10 [ 30.351140] ? find_held_lock+0x2c/0x110 [ 30.351669] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.352242] ? lock_is_held_type+0x9f/0x120 [ 30.352790] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.353414] ? mtree_range_walk+0x632/0x900 [ 30.353980] ? mas_walk+0x5c7/0x7c0 [ 30.354461] do_vmi_munmap+0x1f1/0x2b0 [ 30.354984] mmap_region+0x1f9/0x2660 [ 30.355470] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.355989] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.356713] ? __pfx_lock_acquire+0x10/0x10 [ 30.357260] ? __pfx_mmap_region+0x10/0x10 [ 30.357798] ? security_mmap_addr+0x7d/0xa0 [ 30.358331] ? get_unmapped_area+0x1f5/0x3f0 [ 30.358905] do_mmap+0x854/0xf00 [ 30.359351] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.359852] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.360420] ksys_mmap_pgoff+0x3af/0x500 [ 30.360938] do_syscall_64+0x3f/0x90 [ 30.361427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.362086] RIP: 0033:0x7f2daa5a3d82 [ 30.362551] 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 [ 30.364679] RSP: 002b:00007fffb9ecaa88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.365582] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2daa5a3d82 [ 30.366442] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2da99dd000 [ 30.367326] RBP: 00007f2da99dd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.368182] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e313290ec0 [ 30.369037] R13: 00007fffb9ecaaa0 R14: 00007fffb9ecaad0 R15: 00007fffb9ecae30 [ 30.369897] [ 30.370192] [ 30.370408] Allocated by task 212: [ 30.370845] kasan_save_stack+0x22/0x50 [ 30.371356] kasan_set_track+0x25/0x30 [ 30.371854] __kasan_slab_alloc+0x59/0x70 [ 30.372382] kmem_cache_alloc+0x16b/0x370 [ 30.372898] vm_area_dup+0x20/0x160 [ 30.373353] __split_vma+0x170/0x950 [ 30.373821] split_vma+0xc6/0x110 [ 30.374267] mprotect_fixup+0x8d2/0xb30 [ 30.374780] do_mprotect_pkey+0x87e/0xd40 [ 30.375308] __x64_sys_mprotect+0x78/0xc0 [ 30.375830] do_syscall_64+0x3f/0x90 [ 30.376315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.376958] [ 30.377178] Freed by task 212: [ 30.377571] kasan_save_stack+0x22/0x50 [ 30.378081] kasan_set_track+0x25/0x30 [ 30.378596] kasan_save_free_info+0x2b/0x50 [ 30.379130] __kasan_slab_free+0x10a/0x190 [ 30.379661] kmem_cache_free+0x10d/0x4d0 [ 30.380172] rcu_core+0x8c8/0x2860 [ 30.380616] __do_softirq+0x1b7/0x7d4 [ 30.381100] [ 30.381321] Last potentially related work creation: [ 30.381917] kasan_save_stack+0x22/0x50 [ 30.382422] __kasan_record_aux_stack+0x8e/0xa0 [ 30.383003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.383650] remove_vma+0x139/0x170 [ 30.384105] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.384675] do_vmi_munmap+0x1f1/0x2b0 [ 30.385163] __vm_munmap+0x138/0x3a0 [ 30.385632] __x64_sys_munmap+0x59/0x80 [ 30.386131] do_syscall_64+0x3f/0x90 [ 30.386625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.387276] [ 30.387492] The buggy address belongs to the object at ffff8880195440e8 [ 30.387492] which belongs to the cache vm_area_struct of size 168 [ 30.388961] The buggy address is located 88 bytes inside of [ 30.388961] freed 168-byte region [ffff8880195440e8, ffff888019544190) [ 30.390381] [ 30.390609] The buggy address belongs to the physical page: [ 30.391268] page:0000000021f9375e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19544 [ 30.392373] memcg:ffff888016514701 [ 30.392801] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.393449] page_type: 0xffffffff() [ 30.393910] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.394840] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016514701 [ 30.395758] page dumped because: kasan: bad access detected [ 30.396423] [ 30.396642] Memory state around the buggy address: [ 30.397236] ffff888019544000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.398092] ffff888019544080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.398976] >ffff888019544100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.399842] ^ [ 30.400479] ffff888019544180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.401339] ffff888019544200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.402199] ================================================================== [ 30.403344] Disabling lock debugging due to kernel taint [ 32.400145] BUG: Bad rss-counter state mm:000000001f7a17f0 type:MM_FILEPAGES val:33 [ 32.401129] BUG: Bad rss-counter state mm:000000001f7a17f0 type:MM_ANONPAGES val:22 [ 32.954631] BUG: Bad rss-counter state mm:00000000124c8749 type:MM_FILEPAGES val:33 [ 32.955849] BUG: Bad rss-counter state mm:00000000124c8749 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35898' (ECDSA) to the list of known hosts. 2023/06/20 11:41:42 fuzzer started 2023/06/20 11:41:42 dialing manager at localhost:36067 2023/06/20 11:41:42 checking machine... 2023/06/20 11:41:42 checking revisions... [ 33.615241] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:41:43 testing simple program... [ 33.666270] cgroup: Unknown subsys name 'net' [ 33.705804] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:41:42 Registers: info registers vcpu 0 RAX=000055a928c17ed0 RBX=000055a928c17a20 RCX=00007f176a1358d0 RDX=00007f175c007da0 RSI=000055a928c13e00 RDI=000055a928c17a20 RBP=000055a928c13e00 RSP=00007f176a1358b0 R8 =00007f176a136700 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000286 R12=0000000000000000 R13=000055a927494a50 R14=000055a927494ec0 R15=00007f175c007da0 RIP=000055a92744db72 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f176a136700 00000000 00000000 GS =0000 0000000000000000 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=00007fbb666d7618 CR3=0000000015812000 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=2032343a31343a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a31343a3131203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c04400 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=00007faeb586c470 CR3=000000000f238000 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=2740032b8975b2812e40feb86c889e4a XMM02=000000000011ad68eff9b2d0a8fce9cb XMM03=000000000011ae382c67c8bc2e329bc3 XMM04=a205449d7087372400000000000ae988 XMM05=dfcdbad4f1609c370000000000132248 XMM06=806171799158d96700000000001320d0 XMM07=e042d86d42eb936e00000000001225f0 XMM08=b3b99fdb18d7183f000000000011ae38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000