syzkaller login: [ 28.667623] BUG: Bad rss-counter state mm:00000000d7d48624 type:MM_FILEPAGES val:33 [ 28.668819] BUG: Bad rss-counter state mm:00000000d7d48624 type:MM_ANONPAGES val:22 [ 28.776650] ================================================================== [ 28.777339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.778094] Read of size 8 at addr ffff88800e33bc20 by task sshd/221 [ 28.778676] [ 28.778856] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.779517] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.780452] Call Trace: [ 28.780695] [ 28.780909] dump_stack_lvl+0x91/0xf0 [ 28.781287] print_report+0xcc/0x620 [ 28.781660] ? __virt_addr_valid+0x102/0x340 [ 28.782095] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.782568] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.783058] kasan_report+0xbe/0xf0 [ 28.783420] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.783878] vma_interval_tree_remove+0xc75/0xec0 [ 28.784213] vma_prepare+0xc54/0x11a0 [ 28.784474] __split_vma+0x5af/0x950 [ 28.784735] ? __pfx___split_vma+0x10/0x10 [ 28.785024] ? find_held_lock+0x2c/0x110 [ 28.785307] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.785613] ? lock_is_held_type+0x9f/0x120 [ 28.785910] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.786259] ? mtree_range_walk+0x632/0x900 [ 28.786574] ? mas_walk+0x5c7/0x7c0 [ 28.786847] do_vmi_munmap+0x1f1/0x2b0 [ 28.787127] mmap_region+0x1f9/0x2660 [ 28.787402] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.787691] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.788100] ? __pfx_lock_acquire+0x10/0x10 [ 28.788408] ? __pfx_mmap_region+0x10/0x10 [ 28.788706] ? security_mmap_addr+0x7d/0xa0 [ 28.789019] ? get_unmapped_area+0x1f5/0x3f0 [ 28.789336] do_mmap+0x854/0xf00 [ 28.789586] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.789865] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.790182] ksys_mmap_pgoff+0x3af/0x500 [ 28.790472] do_syscall_64+0x3f/0x90 [ 28.790747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.791121] RIP: 0033:0x7f62d3968d82 [ 28.791382] 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 [ 28.792630] RSP: 002b:00007ffe7a8fe2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.793144] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f62d3968d82 [ 28.793642] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62d2da2000 [ 28.794128] RBP: 00007f62d2da2000 R08: 0000000000000009 R09: 0000000000001000 [ 28.794621] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591194f7d90 [ 28.795127] R13: 00007ffe7a8fe310 R14: 00007ffe7a8fe340 R15: 00007ffe7a8fe6a0 [ 28.795623] [ 28.795788] [ 28.795916] Allocated by task 213: [ 28.796163] kasan_save_stack+0x22/0x50 [ 28.796450] kasan_set_track+0x25/0x30 [ 28.796736] __kasan_slab_alloc+0x59/0x70 [ 28.797036] kmem_cache_alloc+0x16b/0x370 [ 28.797331] vm_area_dup+0x20/0x160 [ 28.797599] __split_vma+0x170/0x950 [ 28.797858] split_vma+0xc6/0x110 [ 28.798104] mprotect_fixup+0x8d2/0xb30 [ 28.798388] do_mprotect_pkey+0x87e/0xd40 [ 28.798684] __x64_sys_mprotect+0x78/0xc0 [ 28.798987] do_syscall_64+0x3f/0x90 [ 28.799260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.799627] [ 28.799748] Freed by task 213: [ 28.799970] kasan_save_stack+0x22/0x50 [ 28.800258] kasan_set_track+0x25/0x30 [ 28.800543] kasan_save_free_info+0x2b/0x50 [ 28.800840] __kasan_slab_free+0x10a/0x190 [ 28.801149] kmem_cache_free+0x10d/0x4d0 [ 28.801438] rcu_core+0x8c8/0x2860 [ 28.801688] __do_softirq+0x1b7/0x7d4 [ 28.801959] [ 28.802076] Last potentially related work creation: [ 28.802416] kasan_save_stack+0x22/0x50 [ 28.802699] __kasan_record_aux_stack+0x8e/0xa0 [ 28.803037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.803411] remove_vma+0x139/0x170 [ 28.803667] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.803980] do_vmi_munmap+0x1f1/0x2b0 [ 28.804261] __vm_munmap+0x138/0x3a0 [ 28.804535] __x64_sys_munmap+0x59/0x80 [ 28.804823] do_syscall_64+0x3f/0x90 [ 28.805104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.805477] [ 28.805597] Second to last potentially related work creation: [ 28.806000] kasan_save_stack+0x22/0x50 [ 28.806281] __kasan_record_aux_stack+0x8e/0xa0 [ 28.806608] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.806979] remove_vma+0x139/0x170 [ 28.807247] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.807571] do_vmi_munmap+0x1f1/0x2b0 [ 28.807850] mmap_region+0x1f9/0x2660 [ 28.808127] do_mmap+0x854/0xf00 [ 28.808378] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.808651] ksys_mmap_pgoff+0x3af/0x500 [ 28.808934] do_syscall_64+0x3f/0x90 [ 28.809210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.809585] [ 28.809707] The buggy address belongs to the object at ffff88800e33bbc8 [ 28.809707] which belongs to the cache vm_area_struct of size 168 [ 28.810557] The buggy address is located 88 bytes inside of [ 28.810557] freed 168-byte region [ffff88800e33bbc8, ffff88800e33bc70) [ 28.811383] [ 28.811504] The buggy address belongs to the physical page: [ 28.811877] page:0000000055193920 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe33b [ 28.812490] memcg:ffff88800ebd9d01 [ 28.812729] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.813094] page_type: 0xffffffff() [ 28.813351] raw: 0100000000000200 ffff8880087a0c80 ffffea00002518c0 dead00000000000a [ 28.813890] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebd9d01 [ 28.814421] page dumped because: kasan: bad access detected [ 28.814804] [ 28.814929] Memory state around the buggy address: [ 28.815262] ffff88800e33bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.815751] ffff88800e33bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.816241] >ffff88800e33bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.816737] ^ [ 28.817049] ffff88800e33bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.817555] ffff88800e33bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.818047] ================================================================== [ 28.818567] Disabling lock debugging due to kernel taint [ 31.265735] BUG: Bad rss-counter state mm:00000000597d557b type:MM_FILEPAGES val:33 [ 31.266608] BUG: Bad rss-counter state mm:00000000597d557b type:MM_ANONPAGES val:22 [ 31.732399] BUG: Bad rss-counter state mm:0000000012526887 type:MM_FILEPAGES val:33 [ 31.733637] BUG: Bad rss-counter state mm:0000000012526887 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33181' (ECDSA) to the list of known hosts. 2023/06/20 12:59:48 fuzzer started 2023/06/20 12:59:48 dialing manager at localhost:36067 2023/06/20 12:59:48 checking machine... 2023/06/20 12:59:48 checking revisions... [ 32.428776] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:59:48 testing simple program... [ 32.480491] cgroup: Unknown subsys name 'net' [ 32.537035] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:59:48 Registers: info registers vcpu 0 RAX=1ffffffff0a59442 RBX=ffffffff852ca210 RCX=0000000000000000 RDX=ffff888016c151c0 RSI=ffffffff81ef4c8c RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff888016487de0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000000000 R14=0000000000000003 R15=0000000000000010 RIP=ffffffff81ef4c97 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 00007f19ae9cd900 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=00007f19aef84618 CR3=000000000f55e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c96685 RBX=0000000000000001 RCX=ffffffff864b342a RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff864b342c RBP=ffff88806cf09ac0 RSP=ffff88806cf099f8 R8 =ffffffff864b342e R9 =ffff88806cf09aa8 R10=0000000000038001 R11=00000000000b53d8 R12=ffff88806cf09ac8 R13=ffff88806cf09ab0 R14=ffff888016487f40 R15=ffff88806cf09a68 RIP=ffffffff811311c7 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 00007f19ae9cd900 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=00007ffed5292000 CR3=000000000f55e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000