[ 30.496597] BUG: Bad rss-counter state mm:00000000e9d27fc6 type:MM_FILEPAGES val:33 [ 30.497276] BUG: Bad rss-counter state mm:00000000e9d27fc6 type:MM_ANONPAGES val:22 [ 30.700932] ================================================================== [ 30.701558] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.702154] Read of size 8 at addr ffff8880098b66b0 by task sshd/222 [ 30.702633] [ 30.702773] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.703322] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.703951] Call Trace: [ 30.704161] [ 30.704342] dump_stack_lvl+0x91/0xf0 [ 30.704652] print_report+0xcc/0x620 [ 30.705021] ? __virt_addr_valid+0x102/0x340 [ 30.705381] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.705768] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.706168] kasan_report+0xbe/0xf0 [ 30.706471] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.706861] vma_interval_tree_remove+0xc75/0xec0 [ 30.707256] vma_prepare+0xc54/0x11a0 [ 30.707561] __split_vma+0x5af/0x950 [ 30.707859] ? __pfx___split_vma+0x10/0x10 [ 30.708207] ? find_held_lock+0x2c/0x110 [ 30.708540] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.708923] ? lock_is_held_type+0x9f/0x120 [ 30.709278] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.709667] ? mtree_range_walk+0x632/0x900 [ 30.710039] ? mas_walk+0x5c7/0x7c0 [ 30.710339] do_vmi_munmap+0x1f1/0x2b0 [ 30.710645] mmap_region+0x1f9/0x2660 [ 30.710958] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.711288] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.711733] ? __pfx_lock_acquire+0x10/0x10 [ 30.712079] ? __pfx_mmap_region+0x10/0x10 [ 30.712413] ? security_mmap_addr+0x7d/0xa0 [ 30.713827] ? get_unmapped_area+0x1f5/0x3f0 [ 30.714242] do_mmap+0x854/0xf00 [ 30.714524] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.714838] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.715264] ksys_mmap_pgoff+0x3af/0x500 [ 30.715594] do_syscall_64+0x3f/0x90 [ 30.715903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.716368] RIP: 0033:0x7f1398340d82 [ 30.716658] 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 [ 30.719882] RSP: 002b:00007ffc46b048c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.721325] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1398340d82 [ 30.721855] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f139777a000 [ 30.729203] RBP: 00007f139777a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.729758] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b982564ec0 [ 30.730314] R13: 00007ffc46b048e0 R14: 00007ffc46b04910 R15: 00007ffc46b04c70 [ 30.730875] [ 30.731073] [ 30.731219] Allocated by task 213: [ 30.731503] kasan_save_stack+0x22/0x50 [ 30.731847] kasan_set_track+0x25/0x30 [ 30.732173] __kasan_slab_alloc+0x59/0x70 [ 30.732523] kmem_cache_alloc+0x16b/0x370 [ 30.732903] vm_area_dup+0x20/0x160 [ 30.733217] __split_vma+0x170/0x950 [ 30.733572] split_vma+0xc6/0x110 [ 30.733902] mprotect_fixup+0x8d2/0xb30 [ 30.734276] do_mprotect_pkey+0x87e/0xd40 [ 30.734623] __x64_sys_mprotect+0x78/0xc0 [ 30.734968] do_syscall_64+0x3f/0x90 [ 30.735287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.735701] [ 30.735845] Freed by task 13: [ 30.736100] kasan_save_stack+0x22/0x50 [ 30.736429] kasan_set_track+0x25/0x30 [ 30.736762] kasan_save_free_info+0x2b/0x50 [ 30.737113] __kasan_slab_free+0x10a/0x190 [ 30.737474] kmem_cache_free+0x10d/0x4d0 [ 30.737811] rcu_core+0x8c8/0x2860 [ 30.738107] __do_softirq+0x1b7/0x7d4 [ 30.738425] [ 30.738571] Last potentially related work creation: [ 30.738952] kasan_save_stack+0x22/0x50 [ 30.739287] __kasan_record_aux_stack+0x8e/0xa0 [ 30.739665] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.740092] remove_vma+0x139/0x170 [ 30.740392] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.740800] do_vmi_munmap+0x1f1/0x2b0 [ 30.741121] __vm_munmap+0x138/0x3a0 [ 30.741428] __x64_sys_munmap+0x59/0x80 [ 30.741757] do_syscall_64+0x3f/0x90 [ 30.742077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.742501] [ 30.742644] The buggy address belongs to the object at ffff8880098b6658 [ 30.742644] which belongs to the cache vm_area_struct of size 168 [ 30.743590] The buggy address is located 88 bytes inside of [ 30.743590] freed 168-byte region [ffff8880098b6658, ffff8880098b6700) [ 30.744496] [ 30.744643] The buggy address belongs to the physical page: [ 30.745102] page:00000000e95e2f59 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x98b6 [ 30.745804] memcg:ffff888015b52201 [ 30.746084] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.746494] page_type: 0xffffffff() [ 30.746792] raw: 0100000000000200 ffff8880087a0c80 ffffea0000669740 dead000000000004 [ 30.747391] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b52201 [ 30.747982] page dumped because: kasan: bad access detected [ 30.748413] [ 30.748556] Memory state around the buggy address: [ 30.748976] ffff8880098b6580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.749529] ffff8880098b6600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.750080] >ffff8880098b6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.750638] ^ [ 30.751016] ffff8880098b6700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.751573] ffff8880098b6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.752126] ================================================================== [ 30.755979] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.744146] BUG: Bad rss-counter state mm:00000000a5d4fe10 type:MM_FILEPAGES val:33 [ 33.759989] BUG: Bad rss-counter state mm:00000000a5d4fe10 type:MM_ANONPAGES val:22 [ 35.009041] BUG: Bad rss-counter state mm:00000000304a5320 type:MM_FILEPAGES val:33 [ 35.009697] BUG: Bad rss-counter state mm:00000000304a5320 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19949' (ECDSA) to the list of known hosts. 2023/06/21 08:17:23 fuzzer started 2023/06/21 08:17:23 dialing manager at localhost:36067 2023/06/21 08:17:23 checking machine... 2023/06/21 08:17:23 checking revisions... [ 35.910925] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:17:23 testing simple program... [ 35.962485] cgroup: Unknown subsys name 'net' [ 36.053857] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:17:23 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800eb67000 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800eb67000 RBP=ffff88800eb67000 RSP=ffff888016e57610 R8 =0000000000000000 R9 =ffffed1001d6ce00 R10=ffff88800eb67003 R11=0000000000000001 R12=ffff888014631890 R13=0000000000000000 R14=fffffbfff0ba7c92 R15=dffffc0000000000 RIP=ffffffff812e049f 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=00007f0f0ce3f790 CR3=000000000c388000 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=0000000000000000fffffffe7ffbfeff XMM01=00000000000000020000000000000000 XMM02=00000000000000008000000000000006 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf39500 RCX=ffffffff8123150a RDX=1ffff1100d9e72b1 RSI=0000000000000004 RDI=ffff88806cf39f99 RBP=000000000000000a RSP=ffff88806cf09f60 R8 =0000000000000001 R9 =ffffed100d9e72b0 R10=ffff88806cf39587 R11=ffff88806cf09ff8 R12=ffff88806cf39500 R13=ffff888008d951c0 R14=0000000000000001 R15=ffffffff852c7908 RIP=ffffffff81231685 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 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=00007f94eaf09328 CR3=0000000005482000 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