Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.556824] BUG: Bad rss-counter state mm:00000000334f5d53 type:MM_FILEPAGES val:33 [ 30.557834] BUG: Bad rss-counter state mm:00000000334f5d53 type:MM_ANONPAGES val:22 [ 30.719991] ================================================================== [ 30.720866] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.721782] Read of size 8 at addr ffff88800d89a4e0 by task sshd/221 [ 30.722705] [ 30.722933] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.723781] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.724766] Call Trace: [ 30.725098] [ 30.725374] dump_stack_lvl+0x91/0xf0 [ 30.725863] print_report+0xcc/0x620 [ 30.726336] ? __virt_addr_valid+0x102/0x340 [ 30.726896] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.727517] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.728126] kasan_report+0xbe/0xf0 [ 30.728599] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.729217] vma_interval_tree_remove+0xc75/0xec0 [ 30.729813] vma_prepare+0xc54/0x11a0 [ 30.730289] __split_vma+0x5af/0x950 [ 30.730753] ? __pfx___split_vma+0x10/0x10 [ 30.731295] ? find_held_lock+0x2c/0x110 [ 30.731814] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.732373] ? lock_is_held_type+0x9f/0x120 [ 30.732910] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.733514] ? mtree_range_walk+0x632/0x900 [ 30.734059] ? mas_walk+0x5c7/0x7c0 [ 30.734532] do_vmi_munmap+0x1f1/0x2b0 [ 30.735024] mmap_region+0x1f9/0x2660 [ 30.735497] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.736012] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.736723] ? __pfx_lock_acquire+0x10/0x10 [ 30.737254] ? __pfx_mmap_region+0x10/0x10 [ 30.737780] ? security_mmap_addr+0x7d/0xa0 [ 30.738323] ? get_unmapped_area+0x1f5/0x3f0 [ 30.738884] do_mmap+0x854/0xf00 [ 30.739324] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.739812] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.740366] ksys_mmap_pgoff+0x3af/0x500 [ 30.740870] do_syscall_64+0x3f/0x90 [ 30.741348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.741990] RIP: 0033:0x7f99beab3d82 [ 30.742440] 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 [ 30.744542] RSP: 002b:00007fff3e0ba298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.745444] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99beab3d82 [ 30.746286] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99bdeed000 [ 30.747129] RBP: 00007f99bdeed000 R08: 0000000000000009 R09: 0000000000001000 [ 30.747962] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579661b1f70 [ 30.748830] R13: 00007fff3e0ba2b0 R14: 00007fff3e0ba2e0 R15: 00007fff3e0ba640 [ 30.749683] [ 30.749973] [ 30.750187] Allocated by task 214: [ 30.750613] kasan_save_stack+0x22/0x50 [ 30.751134] kasan_set_track+0x25/0x30 [ 30.751621] __kasan_slab_alloc+0x59/0x70 [ 30.752134] kmem_cache_alloc+0x16b/0x370 [ 30.752650] vm_area_dup+0x20/0x160 [ 30.753109] __split_vma+0x170/0x950 [ 30.753571] split_vma+0xc6/0x110 [ 30.754014] mprotect_fixup+0x8d2/0xb30 [ 30.754508] do_mprotect_pkey+0x87e/0xd40 [ 30.755034] __x64_sys_mprotect+0x78/0xc0 [ 30.755554] do_syscall_64+0x3f/0x90 [ 30.756028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.756683] [ 30.756892] Freed by task 214: [ 30.757284] kasan_save_stack+0x22/0x50 [ 30.757778] kasan_set_track+0x25/0x30 [ 30.758258] kasan_save_free_info+0x2b/0x50 [ 30.758776] __kasan_slab_free+0x10a/0x190 [ 30.759324] kmem_cache_free+0x10d/0x4d0 [ 30.759822] rcu_core+0x8c8/0x2860 [ 30.760262] __do_softirq+0x1b7/0x7d4 [ 30.760737] [ 30.760951] Last potentially related work creation: [ 30.761527] kasan_save_stack+0x22/0x50 [ 30.762025] __kasan_record_aux_stack+0x8e/0xa0 [ 30.762590] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.763235] remove_vma+0x139/0x170 [ 30.763685] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.764236] do_vmi_munmap+0x1f1/0x2b0 [ 30.764710] __vm_munmap+0x138/0x3a0 [ 30.765173] __x64_sys_munmap+0x59/0x80 [ 30.765665] do_syscall_64+0x3f/0x90 [ 30.766138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.766777] [ 30.767001] The buggy address belongs to the object at ffff88800d89a488 [ 30.767001] which belongs to the cache vm_area_struct of size 168 [ 30.768458] The buggy address is located 88 bytes inside of [ 30.768458] freed 168-byte region [ffff88800d89a488, ffff88800d89a530) [ 30.769867] [ 30.770089] The buggy address belongs to the physical page: [ 30.770746] page:000000000208f69f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd89a [ 30.771837] memcg:ffff88800d3abf01 [ 30.772259] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.772943] page_type: 0xffffffff() [ 30.773390] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.774289] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3abf01 [ 30.775190] page dumped because: kasan: bad access detected [ 30.775830] [ 30.776042] Memory state around the buggy address: [ 30.776614] ffff88800d89a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.777456] ffff88800d89a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.778291] >ffff88800d89a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.779149] ^ [ 30.779922] ffff88800d89a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.780763] ffff88800d89a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.781592] ================================================================== [ 30.782557] Disabling lock debugging due to kernel taint [ 32.666974] BUG: Bad rss-counter state mm:000000009736e2ab type:MM_FILEPAGES val:33 [ 32.668198] BUG: Bad rss-counter state mm:000000009736e2ab type:MM_ANONPAGES val:22 [ 33.134183] BUG: Bad rss-counter state mm:00000000abdb93a2 type:MM_FILEPAGES val:33 [ 33.135396] BUG: Bad rss-counter state mm:00000000abdb93a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15186' (ECDSA) to the list of known hosts. 2023/06/21 06:45:12 fuzzer started 2023/06/21 06:45:12 dialing manager at localhost:36067 2023/06/21 06:45:12 checking machine... 2023/06/21 06:45:12 checking revisions... [ 33.813774] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:45:12 testing simple program... [ 33.859419] cgroup: Unknown subsys name 'net' [ 33.896135] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:45:12 Registers: info registers vcpu 0 RAX=0000000000000246 RBX=ffff888015c02000 RCX=0000000000000000 RDX=ffff88800844e900 RSI=0000000000000000 RDI=ffff888015c02f40 RBP=ffff88800f497b90 RSP=ffff88800f497ad0 R8 =0000000000000001 R9 =0000000000000000 R10=ffff888015c02f30 R11=00000000000b6a61 R12=ffff88800844f780 R13=ffff888015c02000 R14=ffffea0000570080 R15=ffff88806ce3de00 RIP=ffffffff81807383 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 00007fdfd43f2900 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=00007fdfd49aa0b0 CR3=000000001be2e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815345ff RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff845137bf RSP=ffff888008e07e60 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81534607 RFL=00000047 [---Z-PC] 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=00007fff8cd28ef8 CR3=000000000eef6000 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=2032313a35343a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a35343a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000