[ 30.892702] BUG: Bad rss-counter state mm:00000000783e31e4 type:MM_FILEPAGES val:33 [ 30.893638] BUG: Bad rss-counter state mm:00000000783e31e4 type:MM_ANONPAGES val:22 [ 31.012659] ================================================================== [ 31.013314] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.013987] Read of size 8 at addr ffff88800d9c6228 by task sshd/219 [ 31.014535] [ 31.014688] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.015288] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.015973] Call Trace: [ 31.016185] [ 31.016370] dump_stack_lvl+0x91/0xf0 [ 31.016715] print_report+0xcc/0x620 [ 31.017252] ? __virt_addr_valid+0x102/0x340 [ 31.017627] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.018103] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.018528] kasan_report+0xbe/0xf0 [ 31.018846] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.019278] vma_interval_tree_remove+0xc75/0xec0 [ 31.019694] vma_prepare+0xc54/0x11a0 [ 31.020047] __split_vma+0x5af/0x950 [ 31.020362] ? __pfx___split_vma+0x10/0x10 [ 31.020709] ? find_held_lock+0x2c/0x110 [ 31.021092] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.021476] ? lock_is_held_type+0x9f/0x120 [ 31.021881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.022290] ? mtree_range_walk+0x632/0x900 [ 31.022666] ? mas_walk+0x5c7/0x7c0 [ 31.022981] do_vmi_munmap+0x1f1/0x2b0 [ 31.023318] mmap_region+0x1f9/0x2660 [ 31.023631] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.023990] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.024453] ? __pfx_lock_acquire+0x10/0x10 [ 31.024789] ? __pfx_mmap_region+0x10/0x10 [ 31.025163] ? security_mmap_addr+0x7d/0xa0 [ 31.025498] ? get_unmapped_area+0x1f5/0x3f0 [ 31.025915] do_mmap+0x854/0xf00 [ 31.026204] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.026518] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.026867] ksys_mmap_pgoff+0x3af/0x500 [ 31.027212] do_syscall_64+0x3f/0x90 [ 31.027542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.027988] RIP: 0033:0x7fefd3886d82 [ 31.028302] 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 [ 31.029836] RSP: 002b:00007ffe1467d228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.030452] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fefd3886d82 [ 31.031042] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fefd2cc0000 [ 31.031588] RBP: 00007fefd2cc0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.032205] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3690beec0 [ 31.032795] R13: 00007ffe1467d240 R14: 00007ffe1467d270 R15: 00007ffe1467d5d0 [ 31.033400] [ 31.033601] [ 31.033775] Allocated by task 212: [ 31.034069] kasan_save_stack+0x22/0x50 [ 31.034424] kasan_set_track+0x25/0x30 [ 31.034756] __kasan_slab_alloc+0x59/0x70 [ 31.035136] kmem_cache_alloc+0x16b/0x370 [ 31.035490] vm_area_dup+0x20/0x160 [ 31.035798] __split_vma+0x170/0x950 [ 31.036122] split_vma+0xc6/0x110 [ 31.036420] mprotect_fixup+0x8d2/0xb30 [ 31.036762] do_mprotect_pkey+0x87e/0xd40 [ 31.037127] __x64_sys_mprotect+0x78/0xc0 [ 31.037489] do_syscall_64+0x3f/0x90 [ 31.037860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.038300] [ 31.038451] Freed by task 210: [ 31.038724] kasan_save_stack+0x22/0x50 [ 31.039079] kasan_set_track+0x25/0x30 [ 31.039422] kasan_save_free_info+0x2b/0x50 [ 31.039786] __kasan_slab_free+0x10a/0x190 [ 31.040155] kmem_cache_free+0x10d/0x4d0 [ 31.040506] rcu_core+0x8c8/0x2860 [ 31.040820] __do_softirq+0x1b7/0x7d4 [ 31.041152] [ 31.041302] Last potentially related work creation: [ 31.041747] kasan_save_stack+0x22/0x50 [ 31.042097] __kasan_record_aux_stack+0x8e/0xa0 [ 31.042497] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.042924] remove_vma+0x139/0x170 [ 31.043246] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.043629] do_vmi_munmap+0x1f1/0x2b0 [ 31.043969] __vm_munmap+0x138/0x3a0 [ 31.044294] __x64_sys_munmap+0x59/0x80 [ 31.044640] do_syscall_64+0x3f/0x90 [ 31.044966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.045390] [ 31.045535] Second to last potentially related work creation: [ 31.046052] kasan_save_stack+0x22/0x50 [ 31.046403] __kasan_record_aux_stack+0x8e/0xa0 [ 31.046794] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.047272] remove_vma+0x139/0x170 [ 31.047574] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.047939] do_vmi_munmap+0x1f1/0x2b0 [ 31.048269] mmap_region+0x1f9/0x2660 [ 31.048598] do_mmap+0x854/0xf00 [ 31.048895] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.049234] ksys_mmap_pgoff+0x3af/0x500 [ 31.049578] do_syscall_64+0x3f/0x90 [ 31.049970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.050404] [ 31.050549] The buggy address belongs to the object at ffff88800d9c61d0 [ 31.050549] which belongs to the cache vm_area_struct of size 168 [ 31.051550] The buggy address is located 88 bytes inside of [ 31.051550] freed 168-byte region [ffff88800d9c61d0, ffff88800d9c6278) [ 31.052486] [ 31.052635] The buggy address belongs to the physical page: [ 31.053131] page:000000006ef7d1da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9c6 [ 31.053902] memcg:ffff8880094da601 [ 31.054233] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.054670] page_type: 0xffffffff() [ 31.054977] raw: 0100000000000200 ffff8880087a0c80 ffffea000032de40 dead000000000008 [ 31.055591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094da601 [ 31.056217] page dumped because: kasan: bad access detected [ 31.056686] [ 31.056835] Memory state around the buggy address: [ 31.057221] ffff88800d9c6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.057832] ffff88800d9c6180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.058409] >ffff88800d9c6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.058984] ^ [ 31.059378] ffff88800d9c6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.059976] ffff88800d9c6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.060576] ================================================================== [ 31.061708] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.048626] BUG: Bad rss-counter state mm:00000000e0956a90 type:MM_FILEPAGES val:33 [ 33.050284] BUG: Bad rss-counter state mm:00000000e0956a90 type:MM_ANONPAGES val:22 [ 33.518543] BUG: Bad rss-counter state mm:00000000669efffb type:MM_FILEPAGES val:33 [ 33.519776] BUG: Bad rss-counter state mm:00000000669efffb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37029' (ECDSA) to the list of known hosts. 2023/06/21 08:28:32 fuzzer started 2023/06/21 08:28:32 dialing manager at localhost:36067 2023/06/21 08:28:32 checking machine... 2023/06/21 08:28:32 checking revisions... [ 34.309229] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:28:32 testing simple program... [ 34.375938] cgroup: Unknown subsys name 'net' [ 34.450179] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:28:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000255 RCX=ffffffff8171ad4c RDX=ffff88800d709b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888009632658 RSP=ffff8880146e7e70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=00007f4f74cadc00 R14=ffff888009632668 R15=ffff888010151bc0 RIP=ffffffff814c0860 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4f75828900 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=00007f4f74cadc00 CR3=000000000d766000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=36123546ca3f7e6f00000000000ae988 XMM05=6f813512033f8d2a0000000000133708 XMM06=806171799158d9670000000000132438 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff09a5f79 RBX=ffff88801469fa3a RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818c1ed3 RDI=ffffffff84d2fbc8 RBP=0000000000000019 RSP=ffff88801469f958 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88800998e280 R11=0000000000000000 R12=ffff88800998e280 R13=ffff88800998e280 R14=ffffffff84d2fb80 R15=dffffc0000000000 RIP=ffffffff818c1f42 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 00007fbe0fb4b900 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=00007fff78087000 CR3=000000001caf4000 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=6720646572637465733a4d41503d706f 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