syzkaller login: [ 31.457177] BUG: Bad rss-counter state mm:00000000021d94f6 type:MM_FILEPAGES val:33 [ 31.458120] BUG: Bad rss-counter state mm:00000000021d94f6 type:MM_ANONPAGES val:22 [ 31.579240] ================================================================== [ 31.579914] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.580574] Read of size 8 at addr ffff88801a4f4df0 by task sshd/219 [ 31.581117] [ 31.581277] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.581878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.582572] Call Trace: [ 31.582829] [ 31.583198] dump_stack_lvl+0x91/0xf0 [ 31.583625] print_report+0xcc/0x620 [ 31.583990] ? __virt_addr_valid+0x102/0x340 [ 31.584390] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.584813] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.585262] kasan_report+0xbe/0xf0 [ 31.585607] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.586048] vma_interval_tree_remove+0xc75/0xec0 [ 31.586528] vma_prepare+0xc54/0x11a0 [ 31.586910] __split_vma+0x5af/0x950 [ 31.587238] ? __pfx___split_vma+0x10/0x10 [ 31.587602] ? find_held_lock+0x2c/0x110 [ 31.588001] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.588413] ? lock_is_held_type+0x9f/0x120 [ 31.588787] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.589272] ? mtree_range_walk+0x632/0x900 [ 31.589674] ? mas_walk+0x5c7/0x7c0 [ 31.590039] do_vmi_munmap+0x1f1/0x2b0 [ 31.590395] mmap_region+0x1f9/0x2660 [ 31.590760] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.591126] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.591633] ? __pfx_lock_acquire+0x10/0x10 [ 31.592009] ? __pfx_mmap_region+0x10/0x10 [ 31.592369] ? security_mmap_addr+0x7d/0xa0 [ 31.592726] ? get_unmapped_area+0x1f5/0x3f0 [ 31.593107] do_mmap+0x854/0xf00 [ 31.593425] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.593783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.594196] ksys_mmap_pgoff+0x3af/0x500 [ 31.594560] do_syscall_64+0x3f/0x90 [ 31.594929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.595380] RIP: 0033:0x7f22946c0d82 [ 31.595704] 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 [ 31.597199] RSP: 002b:00007fff24fe7f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.597824] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22946c0d82 [ 31.598410] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2293afa000 [ 31.599055] RBP: 00007f2293afa000 R08: 0000000000000009 R09: 0000000000001000 [ 31.599644] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643f770af70 [ 31.600215] R13: 00007fff24fe7f40 R14: 00007fff24fe7f70 R15: 00007fff24fe82d0 [ 31.600823] [ 31.601034] [ 31.601187] Allocated by task 212: [ 31.601464] kasan_save_stack+0x22/0x50 [ 31.601795] kasan_set_track+0x25/0x30 [ 31.602124] __kasan_slab_alloc+0x59/0x70 [ 31.602501] kmem_cache_alloc+0x16b/0x370 [ 31.602868] vm_area_dup+0x20/0x160 [ 31.603178] __split_vma+0x170/0x950 [ 31.603505] split_vma+0xc6/0x110 [ 31.603796] mprotect_fixup+0x8d2/0xb30 [ 31.604133] do_mprotect_pkey+0x87e/0xd40 [ 31.604500] __x64_sys_mprotect+0x78/0xc0 [ 31.604858] do_syscall_64+0x3f/0x90 [ 31.605199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.605643] [ 31.605797] Freed by task 212: [ 31.606072] kasan_save_stack+0x22/0x50 [ 31.606415] kasan_set_track+0x25/0x30 [ 31.606780] kasan_save_free_info+0x2b/0x50 [ 31.607155] __kasan_slab_free+0x10a/0x190 [ 31.607512] kmem_cache_free+0x10d/0x4d0 [ 31.607871] rcu_core+0x8c8/0x2860 [ 31.608194] __do_softirq+0x1b7/0x7d4 [ 31.608536] [ 31.608688] Last potentially related work creation: [ 31.609111] kasan_save_stack+0x22/0x50 [ 31.609466] __kasan_record_aux_stack+0x8e/0xa0 [ 31.609876] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.610327] remove_vma+0x139/0x170 [ 31.610658] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.611113] do_vmi_munmap+0x1f1/0x2b0 [ 31.611464] __vm_munmap+0x138/0x3a0 [ 31.611788] __x64_sys_munmap+0x59/0x80 [ 31.612143] do_syscall_64+0x3f/0x90 [ 31.612496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.612983] [ 31.613134] The buggy address belongs to the object at ffff88801a4f4d98 [ 31.613134] which belongs to the cache vm_area_struct of size 168 [ 31.614141] The buggy address is located 88 bytes inside of [ 31.614141] freed 168-byte region [ffff88801a4f4d98, ffff88801a4f4e40) [ 31.615181] [ 31.615350] The buggy address belongs to the physical page: [ 31.615833] page:000000003c86fdc2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a4f4 [ 31.616595] memcg:ffff888009bb6601 [ 31.616892] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.617349] page_type: 0xffffffff() [ 31.617661] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.618296] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009bb6601 [ 31.618974] page dumped because: kasan: bad access detected [ 31.619434] [ 31.619587] Memory state around the buggy address: [ 31.619998] ffff88801a4f4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.620581] ffff88801a4f4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.621172] >ffff88801a4f4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.621734] ^ [ 31.622293] ffff88801a4f4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.622904] ffff88801a4f4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.623497] ================================================================== [ 31.624259] Disabling lock debugging due to kernel taint [ 33.503723] BUG: Bad rss-counter state mm:00000000e43465b5 type:MM_FILEPAGES val:33 [ 33.504451] BUG: Bad rss-counter state mm:00000000e43465b5 type:MM_ANONPAGES val:22 [ 33.881759] BUG: Bad rss-counter state mm:0000000082fab943 type:MM_FILEPAGES val:33 [ 33.882532] BUG: Bad rss-counter state mm:0000000082fab943 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2353' (ECDSA) to the list of known hosts. 2023/06/20 09:18:01 fuzzer started 2023/06/20 09:18:01 dialing manager at localhost:44161 2023/06/20 09:18:01 checking machine... 2023/06/20 09:18:01 checking revisions... [ 34.396089] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:18:01 testing simple program... [ 34.437074] cgroup: Unknown subsys name 'net' [ 34.489530] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:18:00 Registers: info registers vcpu 0 RAX=ffffffff81f17b40 RBX=ffffffff852c75b8 RCX=0000000000000000 RDX=ffff888018d7b680 RSI=0000000000000081 RDI=ffff88800c223438 RBP=dffffc0000000000 RSP=ffff888017d2f9a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800c223438 R14=0000000000000081 R15=ffff88800c22343a RIP=ffffffff81f17b40 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 00007f4fdb7ec900 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=00007f4fdbda1650 CR3=000000000ed88000 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=2031303a38313a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a38313a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8613751f RBX=0000000000000001 RCX=ffffffff8613751a RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888013f2f390 RSP=ffff888013f2f2c8 R8 =ffffffff8613751e R9 =ffff888013f2f378 R10=0000000000038001 R11=0000000000020d8a R12=ffff888013f2f398 R13=ffff888013f2f380 R14=ffff888013f2f688 R15=ffff888013f2f338 RIP=ffffffff81131134 RFL=00000297 [--S-APC] 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 00007f227af76900 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=00007f227a4098d0 CR3=000000000c64e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=036bce491e36ae6000000000000ae988 XMM05=7ab3190091d49a7c00000000001351d0 XMM06=bee66fa295ac4dbb0000000000133f70 XMM07=fb795ef6d65770560000000000124488 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000