syzkaller login: [ 31.451815] BUG: Bad rss-counter state mm:00000000d40169a3 type:MM_FILEPAGES val:33 [ 31.453341] BUG: Bad rss-counter state mm:00000000d40169a3 type:MM_ANONPAGES val:22 [ 31.601995] ================================================================== [ 31.602933] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.603901] Read of size 8 at addr ffff88800c7b3228 by task sshd/222 [ 31.604690] [ 31.605069] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.605978] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.606985] Call Trace: [ 31.607303] [ 31.607626] dump_stack_lvl+0x91/0xf0 [ 31.608119] print_report+0xcc/0x620 [ 31.608625] ? __virt_addr_valid+0x102/0x340 [ 31.609184] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.609815] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.610462] kasan_report+0xbe/0xf0 [ 31.610947] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.611615] vma_interval_tree_remove+0xc75/0xec0 [ 31.612224] vma_prepare+0xc54/0x11a0 [ 31.612718] __split_vma+0x5af/0x950 [ 31.613197] ? __pfx___split_vma+0x10/0x10 [ 31.613740] ? find_held_lock+0x2c/0x110 [ 31.614260] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.614856] ? lock_is_held_type+0x9f/0x120 [ 31.615428] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.616044] ? mtree_range_walk+0x632/0x900 [ 31.616614] ? mas_walk+0x5c7/0x7c0 [ 31.617096] do_vmi_munmap+0x1f1/0x2b0 [ 31.617604] mmap_region+0x1f9/0x2660 [ 31.618092] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.618637] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.619382] ? __pfx_lock_acquire+0x10/0x10 [ 31.619949] ? __pfx_mmap_region+0x10/0x10 [ 31.620495] ? security_mmap_addr+0x7d/0xa0 [ 31.621031] ? get_unmapped_area+0x1f5/0x3f0 [ 31.621602] do_mmap+0x854/0xf00 [ 31.622049] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.622573] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.623141] ksys_mmap_pgoff+0x3af/0x500 [ 31.623674] do_syscall_64+0x3f/0x90 [ 31.624158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.624819] RIP: 0033:0x7fc983b0ed82 [ 31.625283] 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 [ 31.627501] RSP: 002b:00007ffc7a14e7f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.628434] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc983b0ed82 [ 31.629293] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc982f48000 [ 31.630167] RBP: 00007fc982f48000 R08: 0000000000000009 R09: 0000000000001000 [ 31.631050] R10: 0000000000000812 R11: 0000000000000206 R12: 000055af105e5f70 [ 31.631923] R13: 00007ffc7a14e810 R14: 00007ffc7a14e840 R15: 00007ffc7a14eba0 [ 31.632795] [ 31.633094] [ 31.633312] Allocated by task 215: [ 31.633764] kasan_save_stack+0x22/0x50 [ 31.634272] kasan_set_track+0x25/0x30 [ 31.634794] __kasan_slab_alloc+0x59/0x70 [ 31.635320] kmem_cache_alloc+0x16b/0x370 [ 31.635877] vm_area_dup+0x20/0x160 [ 31.636333] __split_vma+0x170/0x950 [ 31.636824] split_vma+0xc6/0x110 [ 31.637268] mprotect_fixup+0x8d2/0xb30 [ 31.637789] do_mprotect_pkey+0x87e/0xd40 [ 31.638313] __x64_sys_mprotect+0x78/0xc0 [ 31.638865] do_syscall_64+0x3f/0x90 [ 31.639353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.640026] [ 31.640241] Freed by task 215: [ 31.640648] kasan_save_stack+0x22/0x50 [ 31.641161] kasan_set_track+0x25/0x30 [ 31.641670] kasan_save_free_info+0x2b/0x50 [ 31.642213] __kasan_slab_free+0x10a/0x190 [ 31.642784] kmem_cache_free+0x10d/0x4d0 [ 31.643299] rcu_core+0x8c8/0x2860 [ 31.643782] __do_softirq+0x1b7/0x7d4 [ 31.644259] [ 31.644488] Last potentially related work creation: [ 31.645079] kasan_save_stack+0x22/0x50 [ 31.645605] __kasan_record_aux_stack+0x8e/0xa0 [ 31.646267] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.646946] remove_vma+0x139/0x170 [ 31.647419] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.647977] do_vmi_munmap+0x1f1/0x2b0 [ 31.648484] __vm_munmap+0x138/0x3a0 [ 31.648953] __x64_sys_munmap+0x59/0x80 [ 31.649463] do_syscall_64+0x3f/0x90 [ 31.649944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.650616] [ 31.650836] The buggy address belongs to the object at ffff88800c7b31d0 [ 31.650836] which belongs to the cache vm_area_struct of size 168 [ 31.652358] The buggy address is located 88 bytes inside of [ 31.652358] freed 168-byte region [ffff88800c7b31d0, ffff88800c7b3278) [ 31.653803] [ 31.654022] The buggy address belongs to the physical page: [ 31.654718] page:00000000269539bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7b3 [ 31.655842] memcg:ffff88800e41e801 [ 31.656271] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.656990] page_type: 0xffffffff() [ 31.657457] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.658396] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e41e801 [ 31.659313] page dumped because: kasan: bad access detected [ 31.660027] [ 31.660246] Memory state around the buggy address: [ 31.660841] ffff88800c7b3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.661716] ffff88800c7b3180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.662599] >ffff88800c7b3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.663529] ^ [ 31.664089] ffff88800c7b3280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.664973] ffff88800c7b3300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.665843] ================================================================== [ 31.666957] Disabling lock debugging due to kernel taint [ 33.573477] BUG: Bad rss-counter state mm:000000005b8a89e4 type:MM_FILEPAGES val:33 [ 33.574755] BUG: Bad rss-counter state mm:000000005b8a89e4 type:MM_ANONPAGES val:22 [ 34.091404] BUG: Bad rss-counter state mm:0000000026055693 type:MM_FILEPAGES val:33 [ 34.092634] BUG: Bad rss-counter state mm:0000000026055693 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11700' (ECDSA) to the list of known hosts. 2023/06/19 16:15:18 fuzzer started 2023/06/19 16:15:19 dialing manager at localhost:44161 2023/06/19 16:15:19 checking machine... 2023/06/19 16:15:19 checking revisions... [ 34.755567] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:15:19 testing simple program... [ 34.800859] cgroup: Unknown subsys name 'net' [ 34.865343] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:15:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b1c96 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801d0ff950 RSP=ffff88801d0ff888 R8 =ffffffff863b1c9a R9 =ffff88801d0ff938 R10=0000000000038001 R11=000000000008a977 R12=ffff88801d0ff958 R13=ffff88801d0ff940 R14=ffff88801d0fff40 R15=ffff88801d0ff8f8 RIP=ffffffff81131151 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 00007fe6628e2900 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=00007fe662e99618 CR3=000000000ed56000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f4e67e42300 CR3=000000000c5ee000 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=63eef268e05f458d284b89a7f81d9f25 XMM02=2c67c8bc2e329bc3000000000011d550 XMM03=fb795ef6d65770560000000000124330 XMM04=d33c4c3b02a5ae2100000000000ae988 XMM05=59d5b690e0af863b0000000000133ec8 XMM06=c36f150bc42b46d90000000000132d30 XMM07=e042d86d42eb936e00000000001245b0 XMM08=bea94f8041f32a2b000000000011d5b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000