syzkaller login: [ 31.092171] BUG: Bad rss-counter state mm:000000006c45d4ef type:MM_FILEPAGES val:33 [ 31.093345] BUG: Bad rss-counter state mm:000000006c45d4ef type:MM_ANONPAGES val:22 [ 31.261925] ================================================================== [ 31.263024] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.264015] Read of size 8 at addr ffff888015d02880 by task sshd/220 [ 31.264903] [ 31.265119] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.265985] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.266986] Call Trace: [ 31.267311] [ 31.267593] dump_stack_lvl+0x91/0xf0 [ 31.268079] print_report+0xcc/0x620 [ 31.268561] ? __virt_addr_valid+0x102/0x340 [ 31.269112] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.269730] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.270354] kasan_report+0xbe/0xf0 [ 31.270843] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.271463] vma_interval_tree_remove+0xc75/0xec0 [ 31.272067] vma_prepare+0xc54/0x11a0 [ 31.272546] __split_vma+0x5af/0x950 [ 31.273038] ? __pfx___split_vma+0x10/0x10 [ 31.273590] ? find_held_lock+0x2c/0x110 [ 31.274133] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.274737] ? lock_is_held_type+0x9f/0x120 [ 31.275296] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.275920] ? mtree_range_walk+0x632/0x900 [ 31.276489] ? mas_walk+0x5c7/0x7c0 [ 31.276982] do_vmi_munmap+0x1f1/0x2b0 [ 31.277489] mmap_region+0x1f9/0x2660 [ 31.277983] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.278518] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.279258] ? __pfx_lock_acquire+0x10/0x10 [ 31.279808] ? __pfx_mmap_region+0x10/0x10 [ 31.280356] ? security_mmap_addr+0x7d/0xa0 [ 31.280905] ? get_unmapped_area+0x1f5/0x3f0 [ 31.281476] do_mmap+0x854/0xf00 [ 31.281937] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.282451] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.283029] ksys_mmap_pgoff+0x3af/0x500 [ 31.283557] do_syscall_64+0x3f/0x90 [ 31.284061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.284728] RIP: 0033:0x7f160f2cfd82 [ 31.285200] 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 [ 31.287450] RSP: 002b:00007fff9f617998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.288397] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f160f2cfd82 [ 31.289279] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f160e709000 [ 31.290167] RBP: 00007f160e709000 R08: 0000000000000009 R09: 0000000000001000 [ 31.291055] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a49b5a0ec0 [ 31.291932] R13: 00007fff9f6179b0 R14: 00007fff9f6179e0 R15: 00007fff9f617d40 [ 31.292825] [ 31.293131] [ 31.293355] Allocated by task 213: [ 31.293801] kasan_save_stack+0x22/0x50 [ 31.294321] kasan_set_track+0x25/0x30 [ 31.294842] __kasan_slab_alloc+0x59/0x70 [ 31.295384] kmem_cache_alloc+0x16b/0x370 [ 31.295926] vm_area_dup+0x20/0x160 [ 31.296396] __split_vma+0x170/0x950 [ 31.296879] split_vma+0xc6/0x110 [ 31.297327] mprotect_fixup+0x8d2/0xb30 [ 31.297844] do_mprotect_pkey+0x87e/0xd40 [ 31.298379] __x64_sys_mprotect+0x78/0xc0 [ 31.298950] do_syscall_64+0x3f/0x90 [ 31.299442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.300103] [ 31.300323] Freed by task 213: [ 31.300728] kasan_save_stack+0x22/0x50 [ 31.301247] kasan_set_track+0x25/0x30 [ 31.301763] kasan_save_free_info+0x2b/0x50 [ 31.302317] __kasan_slab_free+0x10a/0x190 [ 31.302883] kmem_cache_free+0x10d/0x4d0 [ 31.303408] rcu_core+0x8c8/0x2860 [ 31.303874] __do_softirq+0x1b7/0x7d4 [ 31.304367] [ 31.304587] Last potentially related work creation: [ 31.305195] kasan_save_stack+0x22/0x50 [ 31.305716] __kasan_record_aux_stack+0x8e/0xa0 [ 31.306318] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.306994] remove_vma+0x139/0x170 [ 31.307464] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.308041] do_vmi_munmap+0x1f1/0x2b0 [ 31.308547] __vm_munmap+0x138/0x3a0 [ 31.309036] __x64_sys_munmap+0x59/0x80 [ 31.309551] do_syscall_64+0x3f/0x90 [ 31.310042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.310736] [ 31.310962] The buggy address belongs to the object at ffff888015d02828 [ 31.310962] which belongs to the cache vm_area_struct of size 168 [ 31.312502] The buggy address is located 88 bytes inside of [ 31.312502] freed 168-byte region [ffff888015d02828, ffff888015d028d0) [ 31.313974] [ 31.314194] The buggy address belongs to the physical page: [ 31.314895] page:000000003117e0c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d02 [ 31.316027] memcg:ffff888016b12201 [ 31.316473] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.317136] page_type: 0xffffffff() [ 31.317610] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.318573] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b12201 [ 31.319517] page dumped because: kasan: bad access detected [ 31.320203] [ 31.320423] Memory state around the buggy address: [ 31.321026] ffff888015d02780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.321923] ffff888015d02800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.322832] >ffff888015d02880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.323720] ^ [ 31.324151] ffff888015d02900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.325055] ffff888015d02980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.325950] ================================================================== [ 31.326954] Disabling lock debugging due to kernel taint [ 34.079201] BUG: Bad rss-counter state mm:00000000b43937aa type:MM_FILEPAGES val:33 [ 34.080757] BUG: Bad rss-counter state mm:00000000b43937aa type:MM_ANONPAGES val:22 [ 34.637690] BUG: Bad rss-counter state mm:00000000696c7670 type:MM_FILEPAGES val:33 [ 34.638691] BUG: Bad rss-counter state mm:00000000696c7670 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30889' (ECDSA) to the list of known hosts. 2023/06/20 16:16:33 fuzzer started 2023/06/20 16:16:33 dialing manager at localhost:36067 2023/06/20 16:16:33 checking machine... 2023/06/20 16:16:33 checking revisions... [ 35.271880] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:16:33 testing simple program... [ 35.321490] cgroup: Unknown subsys name 'net' [ 35.374981] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:16:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800885d0c0 RCX=ffffffff812e0135 RDX=1ffff1100110ba1a RSI=0000000000000004 RDI=ffff888015e57848 RBP=1ffff11002bcaf05 RSP=ffff888015e57820 R8 =0000000000000001 R9 =ffffed1002bcaf09 R10=0000000000000003 R11=0000000000000000 R12=ffff888019f80000 R13=ffff88800885d0d0 R14=0000000000000000 R15=ffff888015e57b98 RIP=ffffffff812e01b4 RFL=00000046 [---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 00007efc73f29700 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=00007f465d951f90 CR3=000000000eae2000 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=00000000000000000000000000000000 XMM01=9a6589bb24d16d8573407123948ca2de XMM02=000000000011da10eff9b2d0a8fce9cb XMM03=000000000011dae02c67c8bc2e329bc3 XMM04=e3ecee5dbce38c9300000000000ae988 XMM05=19e9129bd510f2350000000000131fa0 XMM06=0b0f474961be11550000000000130e08 XMM07=e042d86d42eb936e0000000000122468 XMM08=fb61886cee794950000000000011dae0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864aa4f0 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801a19eff0 RSP=ffff88801a19ef28 R8 =ffffffff864aa4f4 R9 =ffff88801a19efd8 R10=0000000000038001 R11=00000000000b3bfc R12=ffff88801a19eff8 R13=ffff88801a19efe0 R14=ffff88801a19efd9 R15=ffff88801a19ef98 RIP=ffffffff81130b06 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 00007fe8aa281900 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=00007fe8aa260020 CR3=000000000ced6000 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