syzkaller login: [ 35.890100] BUG: Bad rss-counter state mm:000000003bb7bebb type:MM_FILEPAGES val:33 [ 35.891349] BUG: Bad rss-counter state mm:000000003bb7bebb type:MM_ANONPAGES val:22 [ 35.928178] ================================================================== [ 35.929267] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.930395] Read of size 8 at addr ffff8880199925c8 by task sshd/222 [ 35.931515] [ 35.931788] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.932994] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.934369] Call Trace: [ 35.934755] [ 35.935152] dump_stack_lvl+0x91/0xf0 [ 35.935779] print_report+0xcc/0x620 [ 35.936310] ? __virt_addr_valid+0x102/0x340 [ 35.936890] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.937543] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.938192] kasan_report+0xbe/0xf0 [ 35.938709] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.939372] vma_interval_tree_remove+0xc75/0xec0 [ 35.940005] vma_prepare+0xc54/0x11a0 [ 35.940512] __split_vma+0x5af/0x950 [ 35.941011] ? __pfx___split_vma+0x10/0x10 [ 35.941562] ? find_held_lock+0x2c/0x110 [ 35.942117] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.942721] ? lock_is_held_type+0x9f/0x120 [ 35.943293] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.943938] ? mtree_range_walk+0x632/0x900 [ 35.944514] ? mas_walk+0x5c7/0x7c0 [ 35.945010] do_vmi_munmap+0x1f1/0x2b0 [ 35.945524] mmap_region+0x1f9/0x2660 [ 35.946028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.946583] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.947326] ? __pfx_lock_acquire+0x10/0x10 [ 35.947884] ? __pfx_mmap_region+0x10/0x10 [ 35.948435] ? security_mmap_addr+0x7d/0xa0 [ 35.948993] ? get_unmapped_area+0x1f5/0x3f0 [ 35.949562] do_mmap+0x854/0xf00 [ 35.950030] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.950565] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.951159] ksys_mmap_pgoff+0x3af/0x500 [ 35.951683] do_syscall_64+0x3f/0x90 [ 35.952183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.952860] RIP: 0033:0x7f29bc8d2d82 [ 35.953343] 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 [ 35.955577] RSP: 002b:00007ffd7973aed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.956699] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29bc8d2d82 [ 35.957579] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29bbd0c000 [ 35.958468] RBP: 00007f29bbd0c000 R08: 0000000000000009 R09: 0000000000001000 [ 35.959384] R10: 0000000000000812 R11: 0000000000000206 R12: 000056247e777ec0 [ 35.960263] R13: 00007ffd7973aef0 R14: 00007ffd7973af20 R15: 00007ffd7973b280 [ 35.961153] [ 35.961456] [ 35.961680] Allocated by task 215: [ 35.962122] kasan_save_stack+0x22/0x50 [ 35.962659] kasan_set_track+0x25/0x30 [ 35.963176] __kasan_slab_alloc+0x59/0x70 [ 35.963726] kmem_cache_alloc+0x16b/0x370 [ 35.964272] vm_area_dup+0x20/0x160 [ 35.964750] __split_vma+0x170/0x950 [ 35.965242] split_vma+0xc6/0x110 [ 35.965701] mprotect_fixup+0x8d2/0xb30 [ 35.966246] do_mprotect_pkey+0x87e/0xd40 [ 35.966781] __x64_sys_mprotect+0x78/0xc0 [ 35.967327] do_syscall_64+0x3f/0x90 [ 35.967810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.968468] [ 35.968691] Freed by task 215: [ 35.969094] kasan_save_stack+0x22/0x50 [ 35.969612] kasan_set_track+0x25/0x30 [ 35.970125] kasan_save_free_info+0x2b/0x50 [ 35.970681] __kasan_slab_free+0x10a/0x190 [ 35.971232] kmem_cache_free+0x10d/0x4d0 [ 35.971759] rcu_core+0x8c8/0x2860 [ 35.972216] __do_softirq+0x1b7/0x7d4 [ 35.972714] [ 35.972935] Last potentially related work creation: [ 35.973528] kasan_save_stack+0x22/0x50 [ 35.974054] __kasan_record_aux_stack+0x8e/0xa0 [ 35.974654] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.975317] remove_vma+0x139/0x170 [ 35.975777] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.976348] do_vmi_munmap+0x1f1/0x2b0 [ 35.976848] __vm_munmap+0x138/0x3a0 [ 35.977327] __x64_sys_munmap+0x59/0x80 [ 35.977837] do_syscall_64+0x3f/0x90 [ 35.978335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.978985] [ 35.979205] The buggy address belongs to the object at ffff888019992570 [ 35.979205] which belongs to the cache vm_area_struct of size 168 [ 35.980687] The buggy address is located 88 bytes inside of [ 35.980687] freed 168-byte region [ffff888019992570, ffff888019992618) [ 35.982121] [ 35.982352] The buggy address belongs to the physical page: [ 35.983016] page:00000000b1a5635a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19992 [ 35.984140] memcg:ffff88800fbe6101 [ 35.984576] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.985233] page_type: 0xffffffff() [ 35.985691] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.986634] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbe6101 [ 35.987560] page dumped because: kasan: bad access detected [ 35.988229] [ 35.988449] Memory state around the buggy address: [ 35.989033] ffff888019992480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.989891] ffff888019992500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 35.990773] >ffff888019992580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.991626] ^ [ 35.992297] ffff888019992600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.993186] ffff888019992680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.994059] ================================================================== [ 35.995387] Disabling lock debugging due to kernel taint [ 38.955979] BUG: Bad rss-counter state mm:00000000b8d9ce60 type:MM_FILEPAGES val:33 [ 38.957040] BUG: Bad rss-counter state mm:00000000b8d9ce60 type:MM_ANONPAGES val:22 [ 39.469054] BUG: Bad rss-counter state mm:00000000a7aa6bd1 type:MM_FILEPAGES val:33 [ 39.470365] BUG: Bad rss-counter state mm:00000000a7aa6bd1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55871' (ECDSA) to the list of known hosts. 2023/06/19 16:25:06 fuzzer started 2023/06/19 16:25:06 dialing manager at localhost:44161 2023/06/19 16:25:06 checking machine... 2023/06/19 16:25:06 checking revisions... [ 40.151816] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:25:07 testing simple program... [ 40.192175] cgroup: Unknown subsys name 'net' [ 40.235246] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:25:01 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffffffff8604e274 RCX=ffffffff8450d49f RDX=0000000000000004 RSI=ffffffff864b19b0 RDI=ffffffff8604e26c RBP=ffffffff8604e26c RSP=ffff88806ce099b8 R8 =ffffffff864b19b0 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b53a6 R12=ffffffff8604e27c R13=ffffffff8604e26c R14=ffffffff8604e26c R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000212 [----A--] 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=00007ffe3d9ef338 CR3=000000000e762000 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=2036303a35323a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a35323a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff861d2062 RBX=ffffffff85e63c38 RCX=ffffffff81f553e2 RDX=0000000000000000 RSI=ffffffff861d1ff6 RDI=ffffffff85e63bf0 RBP=ffffffff85e63c3c RSP=ffff8880143a73f8 R8 =ffffffff861d1ff6 R9 =ffff8880143a74e0 R10=0000000000038001 R11=000000000003aa07 R12=ffffffff85e63c38 R13=ffffffff85e63bf0 R14=0000000000000012 R15=dffffc0000000000 RIP=ffffffff8112fcb7 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 00007fc8da7da900 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=00007ff479afa650 CR3=000000000f2e8000 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=abc65ffb262d0990d64b2b85457870cc XMM02=eff9b2d0a8fce9cb000000000011c678 XMM03=2c67c8bc2e329bc3000000000011c7a0 XMM04=99d98cf2ef60649600000000000ae988 XMM05=8734f6cdb2a435e30000000000134d28 XMM06=59d5b690e0af863b0000000000133be0 XMM07=fb795ef6d657705600000000001240e8 XMM08=2c67c8bc2e329bc3000000000011c7a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000