[ 23.565014] BUG: Bad rss-counter state mm:00000000d287aa70 type:MM_FILEPAGES val:33 [ 23.566543] BUG: Bad rss-counter state mm:00000000d287aa70 type:MM_ANONPAGES val:22 [ 23.669371] ================================================================== [ 23.670073] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.670814] Read of size 8 at addr ffff88800daf3c20 by task sshd/220 [ 23.671406] [ 23.671571] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.672255] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.673021] Call Trace: [ 23.673433] [ 23.673695] dump_stack_lvl+0x91/0xf0 [ 23.674078] print_report+0xcc/0x620 [ 23.674455] ? __virt_addr_valid+0x102/0x340 [ 23.674884] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.675378] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.675886] kasan_report+0xbe/0xf0 [ 23.676263] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.676725] vma_interval_tree_remove+0xc75/0xec0 [ 23.677120] vma_prepare+0xc54/0x11a0 [ 23.677437] __split_vma+0x5af/0x950 [ 23.677744] ? __pfx___split_vma+0x10/0x10 [ 23.678089] ? find_held_lock+0x2c/0x110 [ 23.678431] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.678799] ? lock_is_held_type+0x9f/0x120 [ 23.679158] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.679552] ? mtree_range_walk+0x632/0x900 [ 23.679911] ? mas_walk+0x5c7/0x7c0 [ 23.680229] do_vmi_munmap+0x1f1/0x2b0 [ 23.680549] mmap_region+0x1f9/0x2660 [ 23.680863] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.681199] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.681667] ? __pfx_lock_acquire+0x10/0x10 [ 23.682016] ? __pfx_mmap_region+0x10/0x10 [ 23.682359] ? security_mmap_addr+0x7d/0xa0 [ 23.682707] ? get_unmapped_area+0x1f5/0x3f0 [ 23.683064] do_mmap+0x854/0xf00 [ 23.683353] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.683672] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.684052] ksys_mmap_pgoff+0x3af/0x500 [ 23.684386] do_syscall_64+0x3f/0x90 [ 23.684702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.685128] RIP: 0033:0x7f50357a8d82 [ 23.685428] 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 [ 23.686829] RSP: 002b:00007ffdab57df28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.687420] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f50357a8d82 [ 23.687976] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5034be2000 [ 23.688541] RBP: 00007f5034be2000 R08: 0000000000000009 R09: 0000000000001000 [ 23.689103] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fba5e25b20 [ 23.689656] R13: 00007ffdab57df40 R14: 00007ffdab57df70 R15: 00007ffdab57e2d0 [ 23.690209] [ 23.690402] [ 23.690541] Allocated by task 213: [ 23.690822] kasan_save_stack+0x22/0x50 [ 23.691149] kasan_set_track+0x25/0x30 [ 23.691470] __kasan_slab_alloc+0x59/0x70 [ 23.691808] kmem_cache_alloc+0x16b/0x370 [ 23.692151] vm_area_dup+0x20/0x160 [ 23.692444] __split_vma+0x170/0x950 [ 23.692751] split_vma+0xc6/0x110 [ 23.693037] mprotect_fixup+0x8d2/0xb30 [ 23.693363] do_mprotect_pkey+0x87e/0xd40 [ 23.693699] __x64_sys_mprotect+0x78/0xc0 [ 23.694041] do_syscall_64+0x3f/0x90 [ 23.694347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.694767] [ 23.694906] Freed by task 204: [ 23.695159] kasan_save_stack+0x22/0x50 [ 23.695487] kasan_set_track+0x25/0x30 [ 23.695806] kasan_save_free_info+0x2b/0x50 [ 23.696166] __kasan_slab_free+0x10a/0x190 [ 23.696513] kmem_cache_free+0x10d/0x4d0 [ 23.696841] rcu_core+0x8c8/0x2860 [ 23.697134] __do_softirq+0x1b7/0x7d4 [ 23.697451] [ 23.697589] Last potentially related work creation: [ 23.697972] kasan_save_stack+0x22/0x50 [ 23.698298] __kasan_record_aux_stack+0x8e/0xa0 [ 23.698673] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.699093] remove_vma+0x139/0x170 [ 23.699384] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.699743] do_vmi_munmap+0x1f1/0x2b0 [ 23.700063] __vm_munmap+0x138/0x3a0 [ 23.700372] __x64_sys_munmap+0x59/0x80 [ 23.700692] do_syscall_64+0x3f/0x90 [ 23.701001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.701417] [ 23.701556] The buggy address belongs to the object at ffff88800daf3bc8 [ 23.701556] which belongs to the cache vm_area_struct of size 168 [ 23.702509] The buggy address is located 88 bytes inside of [ 23.702509] freed 168-byte region [ffff88800daf3bc8, ffff88800daf3c70) [ 23.703426] [ 23.703569] The buggy address belongs to the physical page: [ 23.703997] page:000000005a1f7642 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdaf3 [ 23.704715] memcg:ffff88800e4f9b01 [ 23.704992] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.705410] page_type: 0xffffffff() [ 23.705700] raw: 0100000000000200 ffff8880087a0c80 ffffea000037b1c0 dead000000000002 [ 23.706292] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4f9b01 [ 23.706880] page dumped because: kasan: bad access detected [ 23.707308] [ 23.707450] Memory state around the buggy address: [ 23.707834] ffff88800daf3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.708397] ffff88800daf3b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 23.708953] >ffff88800daf3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.709509] ^ [ 23.709851] ffff88800daf3c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 23.710414] ffff88800daf3d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 23.710969] ================================================================== [ 23.711561] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.254695] BUG: Bad rss-counter state mm:000000000118cd51 type:MM_FILEPAGES val:33 [ 25.255461] BUG: Bad rss-counter state mm:000000000118cd51 type:MM_ANONPAGES val:22 [ 25.712554] BUG: Bad rss-counter state mm:000000001f3cc214 type:MM_FILEPAGES val:33 [ 25.713757] BUG: Bad rss-counter state mm:000000001f3cc214 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63820' (ECDSA) to the list of known hosts. 2023/06/21 06:26:54 fuzzer started 2023/06/21 06:26:54 dialing manager at localhost:36067 2023/06/21 06:26:54 checking machine... 2023/06/21 06:26:54 checking revisions... [ 26.296334] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:26:54 testing simple program... [ 26.335748] cgroup: Unknown subsys name 'net' [ 26.372768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:26:54 Registers: info registers vcpu 0 RAX=1ffff1100351f639 RBX=ffff88801a8fb198 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801a8fb1c8 RBP=ffff8880168bb488 RSP=ffff888008d9fc68 R8 =0000000000000001 R9 =ffffed10011b3f81 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff8880168fd7c0 R14=ffffffff81165022 R15=ffff88800f843680 RIP=ffffffff818464ec 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 0000000000000000 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=00007fa16bba20b0 CR3=000000000fd88000 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=36323a3630203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383931 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=ffffffff81263eb0 RBX=1ffff1100d9e13b4 RCX=1ffffffff0a57fdf RDX=0000000000000008 RSI=0000000000000001 RDI=ffff888008d91b40 RBP=ffff888008d91b40 RSP=ffff88806cf09d58 R8 =ffff888008d91b58 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=1ffff1100d9e7479 R12=0000000000000083 R13=ffff888008d92450 R14=ffff888008d91b54 R15=0000000000000001 RIP=ffffffff81263eb4 RFL=00000002 [-------] 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=00007fdbe34b9dd0 CR3=0000000009834000 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=c8d6f3e18d3a6e956f4407994ca1ac34 XMM02=000000000011a7c0ec2efd57dc4c00df XMM03=0000000000121208dd3f41e412af6904 XMM04=a3befaaf674d1f8e00000000000ae988 XMM05=19e9129bd510f2350000000000130da0 XMM06=8877408db45805da000000000012ff78 XMM07=e042d86d42eb936e00000000001214e0 XMM08=dd3f41e412af6904000000000011a820 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000