syzkaller login: [ 71.554766] BUG: Bad rss-counter state mm:00000000f8c82235 type:MM_FILEPAGES val:33 [ 71.555962] BUG: Bad rss-counter state mm:00000000f8c82235 type:MM_ANONPAGES val:22 [ 71.721041] ================================================================== [ 71.722147] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.723068] Read of size 8 at addr ffff8880145e83f8 by task sshd/220 [ 71.723855] [ 71.724077] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 71.725111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.726074] Call Trace: [ 71.726394] [ 71.726682] dump_stack_lvl+0x91/0xf0 [ 71.727172] print_report+0xcc/0x620 [ 71.727656] ? __virt_addr_valid+0x102/0x340 [ 71.728206] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.728819] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.729447] kasan_report+0xbe/0xf0 [ 71.729921] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.730533] vma_interval_tree_remove+0xc75/0xec0 [ 71.731140] vma_prepare+0xc54/0x11a0 [ 71.731631] __split_vma+0x5af/0x950 [ 71.732104] ? __pfx___split_vma+0x10/0x10 [ 71.732643] ? find_held_lock+0x2c/0x110 [ 71.733184] do_vmi_align_munmap+0x2ba/0x11f0 [ 71.733752] ? lock_is_held_type+0x9f/0x120 [ 71.734291] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 71.734902] ? mtree_range_walk+0x632/0x900 [ 71.735457] ? mas_walk+0x5c7/0x7c0 [ 71.735937] do_vmi_munmap+0x1f1/0x2b0 [ 71.736433] mmap_region+0x1f9/0x2660 [ 71.736918] ? vm_mmap_pgoff+0x15c/0x3a0 [ 71.737440] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 71.738180] ? __pfx_lock_acquire+0x10/0x10 [ 71.738709] ? __pfx_mmap_region+0x10/0x10 [ 71.739231] ? security_mmap_addr+0x7d/0xa0 [ 71.739754] ? get_unmapped_area+0x1f5/0x3f0 [ 71.740302] do_mmap+0x854/0xf00 [ 71.740739] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.741237] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.741796] ksys_mmap_pgoff+0x3af/0x500 [ 71.742305] do_syscall_64+0x3f/0x90 [ 71.742792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.743439] RIP: 0033:0x7fe6c017cd82 [ 71.743898] 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 [ 71.746028] RSP: 002b:00007ffe475b43e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 71.746944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6c017cd82 [ 71.747796] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6bf5b6000 [ 71.748677] RBP: 00007fe6bf5b6000 R08: 0000000000000009 R09: 0000000000001000 [ 71.749566] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564129e19d90 [ 71.750446] R13: 00007ffe475b4400 R14: 00007ffe475b4430 R15: 00007ffe475b4790 [ 71.751338] [ 71.751641] [ 71.751863] Allocated by task 213: [ 71.752313] kasan_save_stack+0x22/0x50 [ 71.752835] kasan_set_track+0x25/0x30 [ 71.753365] __kasan_slab_alloc+0x59/0x70 [ 71.753912] kmem_cache_alloc+0x16b/0x370 [ 71.754444] vm_area_dup+0x20/0x160 [ 71.754927] __split_vma+0x170/0x950 [ 71.755410] split_vma+0xc6/0x110 [ 71.755861] mprotect_fixup+0x8d2/0xb30 [ 71.756381] do_mprotect_pkey+0x87e/0xd40 [ 71.756925] __x64_sys_mprotect+0x78/0xc0 [ 71.757488] do_syscall_64+0x3f/0x90 [ 71.757973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.758639] [ 71.758862] Freed by task 213: [ 71.759269] kasan_save_stack+0x22/0x50 [ 71.759792] kasan_set_track+0x25/0x30 [ 71.760306] kasan_save_free_info+0x2b/0x50 [ 71.760866] __kasan_slab_free+0x10a/0x190 [ 71.761429] kmem_cache_free+0x10d/0x4d0 [ 71.761958] rcu_core+0x8c8/0x2860 [ 71.762426] __do_softirq+0x1b7/0x7d4 [ 71.762973] [ 71.763198] Last potentially related work creation: [ 71.763816] kasan_save_stack+0x22/0x50 [ 71.764338] __kasan_record_aux_stack+0x8e/0xa0 [ 71.764955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.765624] remove_vma+0x139/0x170 [ 71.766099] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.766678] do_vmi_munmap+0x1f1/0x2b0 [ 71.767184] __vm_munmap+0x138/0x3a0 [ 71.767673] __x64_sys_munmap+0x59/0x80 [ 71.768193] do_syscall_64+0x3f/0x90 [ 71.768685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.769367] [ 71.769592] The buggy address belongs to the object at ffff8880145e83a0 [ 71.769592] which belongs to the cache vm_area_struct of size 168 [ 71.771140] The buggy address is located 88 bytes inside of [ 71.771140] freed 168-byte region [ffff8880145e83a0, ffff8880145e8448) [ 71.772618] [ 71.772848] The buggy address belongs to the physical page: [ 71.773558] page:000000003e0f0ea0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145e8 [ 71.774697] memcg:ffff88800fecc701 [ 71.775139] flags: 0x100000000000200(slab|node=0|zone=1) [ 71.775816] page_type: 0xffffffff() [ 71.776283] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 71.777263] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fecc701 [ 71.778214] page dumped because: kasan: bad access detected [ 71.778908] [ 71.779128] Memory state around the buggy address: [ 71.779735] ffff8880145e8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 71.780622] ffff8880145e8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 71.781524] >ffff8880145e8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 71.782419] ^ [ 71.783306] ffff8880145e8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 71.784188] ffff8880145e8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.785112] ================================================================== [ 71.786162] Disabling lock debugging due to kernel taint [ 74.073663] BUG: Bad rss-counter state mm:000000007692fd79 type:MM_FILEPAGES val:33 [ 74.074682] BUG: Bad rss-counter state mm:000000007692fd79 type:MM_ANONPAGES val:22 [ 74.625847] BUG: Bad rss-counter state mm:000000001def6a55 type:MM_FILEPAGES val:33 [ 74.627074] BUG: Bad rss-counter state mm:000000001def6a55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51325' (ECDSA) to the list of known hosts. 2023/06/20 00:41:14 fuzzer started 2023/06/20 00:41:14 dialing manager at localhost:44161 2023/06/20 00:41:14 checking machine... 2023/06/20 00:41:14 checking revisions... [ 75.337507] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:41:14 testing simple program... [ 75.396942] cgroup: Unknown subsys name 'net' [ 75.437150] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:40:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=1ffff11003052e8c RSI=ffffffff8180c522 RDI=ffff8880182974d0 RBP=ffff8880182974a0 RSP=ffff8880182973f8 R8 =ffffffff860d68fa R9 =ffff888018297448 R10=0000000000038001 R11=0000000000010b7e R12=ffff8880182974d0 R13=0000000000000000 R14=ffff8880159d3680 R15=000000000000001e RIP=ffffffff813ad42f RFL=00000286 [--S--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 00007f60d391a700 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=00007f37acbb9618 CR3=000000000c664000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732033313a3134 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363438 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81288f47 RDX=000000000000288f RSI=000000000000288f RDI=ffffffff864f1dfc RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000000 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000000ba82 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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 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=00007f76af485f70 CR3=000000000c690000 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=ccd423f22ad58aaac34d68cf43f9cb0c XMM02=2c67c8bc2e329bc30000000000120698 XMM03=fb795ef6d65770560000000000127df8 XMM04=459142f3f162655b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000137fe8 XMM06=8de896983ef7064700000000001366e8 XMM07=e042d86d42eb936e0000000000128078 XMM08=7cdcbf13d62e152b00000000001206f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000