[ 23.712455] BUG: Bad rss-counter state mm:00000000d26773c2 type:MM_FILEPAGES val:33 [ 23.713252] BUG: Bad rss-counter state mm:00000000d26773c2 type:MM_ANONPAGES val:22 [ 23.843821] ================================================================== [ 23.844548] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.845274] Read of size 8 at addr ffff88800e0f1a50 by task sshd/218 [ 23.845853] [ 23.846021] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.846665] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.847397] Call Trace: [ 23.847647] [ 23.847866] dump_stack_lvl+0x91/0xf0 [ 23.848425] print_report+0xcc/0x620 [ 23.848793] ? __virt_addr_valid+0x102/0x340 [ 23.849213] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.849678] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.850141] kasan_report+0xbe/0xf0 [ 23.850511] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.850979] vma_interval_tree_remove+0xc75/0xec0 [ 23.851436] vma_prepare+0xc54/0x11a0 [ 23.851809] __split_vma+0x5af/0x950 [ 23.852169] ? __pfx___split_vma+0x10/0x10 [ 23.852594] ? find_held_lock+0x2c/0x110 [ 23.853022] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.853470] ? lock_is_held_type+0x9f/0x120 [ 23.853878] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.854337] ? mtree_range_walk+0x632/0x900 [ 23.854754] ? mas_walk+0x5c7/0x7c0 [ 23.855118] do_vmi_munmap+0x1f1/0x2b0 [ 23.855494] mmap_region+0x1f9/0x2660 [ 23.855879] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.856268] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.856803] ? __pfx_lock_acquire+0x10/0x10 [ 23.857206] ? __pfx_mmap_region+0x10/0x10 [ 23.857612] ? security_mmap_addr+0x7d/0xa0 [ 23.858018] ? get_unmapped_area+0x1f5/0x3f0 [ 23.858433] do_mmap+0x854/0xf00 [ 23.858765] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.859139] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.859569] ksys_mmap_pgoff+0x3af/0x500 [ 23.859967] do_syscall_64+0x3f/0x90 [ 23.860349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.860886] RIP: 0033:0x7f55dbfafd82 [ 23.861275] 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 [ 23.863067] RSP: 002b:00007ffcdc984a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.863836] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55dbfafd82 [ 23.864537] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55db3e9000 [ 23.865243] RBP: 00007f55db3e9000 R08: 0000000000000009 R09: 0000000000001000 [ 23.865940] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636fc348ec0 [ 23.866651] R13: 00007ffcdc984ab0 R14: 00007ffcdc984ae0 R15: 00007ffcdc984e40 [ 23.867370] [ 23.867618] [ 23.867794] Allocated by task 211: [ 23.868153] kasan_save_stack+0x22/0x50 [ 23.868567] kasan_set_track+0x25/0x30 [ 23.868969] __kasan_slab_alloc+0x59/0x70 [ 23.869407] kmem_cache_alloc+0x16b/0x370 [ 23.869828] vm_area_dup+0x20/0x160 [ 23.870180] __split_vma+0x170/0x950 [ 23.870534] split_vma+0xc6/0x110 [ 23.870870] mprotect_fixup+0x8d2/0xb30 [ 23.871252] do_mprotect_pkey+0x87e/0xd40 [ 23.871663] __x64_sys_mprotect+0x78/0xc0 [ 23.872058] do_syscall_64+0x3f/0x90 [ 23.872424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.872933] [ 23.873108] Freed by task 211: [ 23.873412] kasan_save_stack+0x22/0x50 [ 23.873799] kasan_set_track+0x25/0x30 [ 23.874175] kasan_save_free_info+0x2b/0x50 [ 23.874580] __kasan_slab_free+0x10a/0x190 [ 23.874985] kmem_cache_free+0x10d/0x4d0 [ 23.875370] rcu_core+0x8c8/0x2860 [ 23.875714] __do_softirq+0x1b7/0x7d4 [ 23.876078] [ 23.876244] Last potentially related work creation: [ 23.876687] kasan_save_stack+0x22/0x50 [ 23.877069] __kasan_record_aux_stack+0x8e/0xa0 [ 23.877501] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.877991] remove_vma+0x139/0x170 [ 23.878336] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.878758] do_vmi_munmap+0x1f1/0x2b0 [ 23.879130] __vm_munmap+0x138/0x3a0 [ 23.879485] __x64_sys_munmap+0x59/0x80 [ 23.879870] do_syscall_64+0x3f/0x90 [ 23.880235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.880724] [ 23.880888] Second to last potentially related work creation: [ 23.881401] kasan_save_stack+0x22/0x50 [ 23.881783] __kasan_record_aux_stack+0x8e/0xa0 [ 23.882220] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.882705] remove_vma+0x139/0x170 [ 23.883052] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.883473] do_vmi_munmap+0x1f1/0x2b0 [ 23.883854] mmap_region+0x1f9/0x2660 [ 23.884215] do_mmap+0x854/0xf00 [ 23.884540] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.884909] ksys_mmap_pgoff+0x3af/0x500 [ 23.885290] do_syscall_64+0x3f/0x90 [ 23.885676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.886203] [ 23.886374] The buggy address belongs to the object at ffff88800e0f19f8 [ 23.886374] which belongs to the cache vm_area_struct of size 168 [ 23.887555] The buggy address is located 88 bytes inside of [ 23.887555] freed 168-byte region [ffff88800e0f19f8, ffff88800e0f1aa0) [ 23.888620] [ 23.888785] The buggy address belongs to the physical page: [ 23.889287] page:0000000013aadd53 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0f1 [ 23.890104] memcg:ffff88800d257501 [ 23.890428] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.890956] page_type: 0xffffffff() [ 23.891298] raw: 0100000000000200 ffff8880087a0c80 ffffea00002e3a80 dead000000000007 [ 23.892046] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d257501 [ 23.892724] page dumped because: kasan: bad access detected [ 23.893231] [ 23.893397] Memory state around the buggy address: [ 23.893840] ffff88800e0f1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.894520] ffff88800e0f1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 23.895193] >ffff88800e0f1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.895925] ^ [ 23.896518] ffff88800e0f1a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 23.897213] ffff88800e0f1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.897936] ================================================================== [ 23.898879] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.248952] BUG: Bad rss-counter state mm:000000002febb463 type:MM_FILEPAGES val:33 [ 26.249951] BUG: Bad rss-counter state mm:000000002febb463 type:MM_ANONPAGES val:22 [ 26.794234] BUG: Bad rss-counter state mm:000000006e928ac5 type:MM_FILEPAGES val:33 [ 26.795211] BUG: Bad rss-counter state mm:000000006e928ac5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1569' (ECDSA) to the list of known hosts. 2023/06/20 10:49:25 fuzzer started 2023/06/20 10:49:25 dialing manager at localhost:36067 2023/06/20 10:49:25 checking machine... 2023/06/20 10:49:25 checking revisions... [ 27.516032] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:49:25 testing simple program... [ 27.577734] cgroup: Unknown subsys name 'net' [ 27.630556] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:49:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180ca5a RCX=ffffffff86139701 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8180ca5a RBP=ffff88806ce09af0 RSP=ffff88806ce09a68 R8 =ffffffff86139748 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800db35410 RIP=ffffffff811fc7a0 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 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=00007f083aca5ec0 CR3=0000000019a38000 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=2034323a39343a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a39343a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800e9a2b30 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000200 RSP=ffff88801662f9e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff81845e00 R13=0000000000000000 R14=0000000000000000 R15=ffff8880084c6140 RIP=ffffffff813710d2 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 00007f690fdd6900 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=00007f690fd9b008 CR3=000000001bc26000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000