syzkaller login: [ 30.970091] BUG: Bad rss-counter state mm:0000000047d641a5 type:MM_FILEPAGES val:33 [ 30.971101] BUG: Bad rss-counter state mm:0000000047d641a5 type:MM_ANONPAGES val:22 [ 31.083351] ================================================================== [ 31.083985] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.084605] Read of size 8 at addr ffff88800c62f140 by task sshd/221 [ 31.085114] [ 31.085254] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.085813] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.086439] Call Trace: [ 31.086651] [ 31.086842] dump_stack_lvl+0x91/0xf0 [ 31.087166] print_report+0xcc/0x620 [ 31.087475] ? __virt_addr_valid+0x102/0x340 [ 31.088053] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.088460] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.088841] kasan_report+0xbe/0xf0 [ 31.089191] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.089620] vma_interval_tree_remove+0xc75/0xec0 [ 31.090055] vma_prepare+0xc54/0x11a0 [ 31.090374] __split_vma+0x5af/0x950 [ 31.090679] ? __pfx___split_vma+0x10/0x10 [ 31.091011] ? find_held_lock+0x2c/0x110 [ 31.091348] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.091727] ? lock_is_held_type+0x9f/0x120 [ 31.092087] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.092480] ? mtree_range_walk+0x632/0x900 [ 31.092845] ? mas_walk+0x5c7/0x7c0 [ 31.093184] do_vmi_munmap+0x1f1/0x2b0 [ 31.093507] mmap_region+0x1f9/0x2660 [ 31.093830] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.094167] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.094637] ? __pfx_lock_acquire+0x10/0x10 [ 31.094994] ? __pfx_mmap_region+0x10/0x10 [ 31.095344] ? security_mmap_addr+0x7d/0xa0 [ 31.095700] ? get_unmapped_area+0x1f5/0x3f0 [ 31.096071] do_mmap+0x854/0xf00 [ 31.096358] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.096678] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.097076] ksys_mmap_pgoff+0x3af/0x500 [ 31.097402] do_syscall_64+0x3f/0x90 [ 31.097702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.098118] RIP: 0033:0x7f01a4e91d82 [ 31.098400] 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 [ 31.099842] RSP: 002b:00007ffe4f9aeb38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.100441] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01a4e91d82 [ 31.101005] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f01a42cb000 [ 31.101626] RBP: 00007f01a42cb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.102193] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dbfdbe0ec0 [ 31.102752] R13: 00007ffe4f9aeb50 R14: 00007ffe4f9aeb80 R15: 00007ffe4f9aeee0 [ 31.103318] [ 31.103511] [ 31.103652] Allocated by task 214: [ 31.103933] kasan_save_stack+0x22/0x50 [ 31.104264] kasan_set_track+0x25/0x30 [ 31.104574] __kasan_slab_alloc+0x59/0x70 [ 31.104908] kmem_cache_alloc+0x16b/0x370 [ 31.105248] vm_area_dup+0x20/0x160 [ 31.105533] __split_vma+0x170/0x950 [ 31.105831] split_vma+0xc6/0x110 [ 31.106112] mprotect_fixup+0x8d2/0xb30 [ 31.106427] do_mprotect_pkey+0x87e/0xd40 [ 31.106760] __x64_sys_mprotect+0x78/0xc0 [ 31.107080] do_syscall_64+0x3f/0x90 [ 31.107376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.107785] [ 31.107917] Freed by task 214: [ 31.108161] kasan_save_stack+0x22/0x50 [ 31.108473] kasan_set_track+0x25/0x30 [ 31.108778] kasan_save_free_info+0x2b/0x50 [ 31.109157] __kasan_slab_free+0x10a/0x190 [ 31.109492] kmem_cache_free+0x10d/0x4d0 [ 31.109838] rcu_core+0x8c8/0x2860 [ 31.110135] __do_softirq+0x1b7/0x7d4 [ 31.110432] [ 31.110565] Last potentially related work creation: [ 31.110925] kasan_save_stack+0x22/0x50 [ 31.111241] __kasan_record_aux_stack+0x8e/0xa0 [ 31.111598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.112052] remove_vma+0x139/0x170 [ 31.112372] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.112763] do_vmi_munmap+0x1f1/0x2b0 [ 31.113123] __vm_munmap+0x138/0x3a0 [ 31.113438] __x64_sys_munmap+0x59/0x80 [ 31.113773] do_syscall_64+0x3f/0x90 [ 31.114095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.114529] [ 31.114671] The buggy address belongs to the object at ffff88800c62f0e8 [ 31.114671] which belongs to the cache vm_area_struct of size 168 [ 31.115659] The buggy address is located 88 bytes inside of [ 31.115659] freed 168-byte region [ffff88800c62f0e8, ffff88800c62f190) [ 31.116608] [ 31.116752] The buggy address belongs to the physical page: [ 31.117216] page:0000000017b44cf6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc62f [ 31.117950] memcg:ffff8880097e0701 [ 31.118236] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.118660] page_type: 0xffffffff() [ 31.118961] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.119574] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097e0701 [ 31.120199] page dumped because: kasan: bad access detected [ 31.120609] [ 31.120742] Memory state around the buggy address: [ 31.121171] ffff88800c62f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.121714] ffff88800c62f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.122291] >ffff88800c62f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.122877] ^ [ 31.123309] ffff88800c62f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.123894] ffff88800c62f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.124473] ================================================================== [ 31.125360] Disabling lock debugging due to kernel taint [ 32.525295] BUG: Bad rss-counter state mm:000000009d164593 type:MM_FILEPAGES val:33 [ 32.526443] BUG: Bad rss-counter state mm:000000009d164593 type:MM_ANONPAGES val:22 [ 32.875406] BUG: Bad rss-counter state mm:000000004a6368be type:MM_FILEPAGES val:33 [ 32.876096] BUG: Bad rss-counter state mm:000000004a6368be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35169' (ECDSA) to the list of known hosts. 2023/06/21 09:30:42 fuzzer started 2023/06/21 09:30:42 dialing manager at localhost:36067 2023/06/21 09:30:42 checking machine... 2023/06/21 09:30:42 checking revisions... [ 33.452214] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:30:42 testing simple program... [ 33.489168] cgroup: Unknown subsys name 'net' [ 33.532543] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:30:42 Registers: info registers vcpu 0 RAX=ffffffff8451105e RBX=ffffffff813ad470 RCX=ffffffff860a1401 RDX=1ffff1100d9c135e RSI=ffffffff8451105e RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff860a1444 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff8880100928d0 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 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=00007f48c490c000 CR3=000000000c5fe000 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=2031343a30333a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a30333a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801426ff48 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801426ff01 RSI=ffff88801426fef8 RDI=ffff88801426fef8 RBP=ffff88801426f040 RSP=ffff88801426ef78 R8 =0000000000000001 R9 =ffff88801426f028 R10=0000000000038001 R11=000000000001e471 R12=ffff88801426f048 R13=ffff88801426f030 R14=ffff88801426fef8 R15=ffff88801426efe8 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f153d041900 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=00007f153cfde008 CR3=000000001be00000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000