[ 30.735912] BUG: Bad rss-counter state mm:00000000e6c2dd5b type:MM_FILEPAGES val:33 [ 30.737130] BUG: Bad rss-counter state mm:00000000e6c2dd5b type:MM_ANONPAGES val:22 [ 30.778207] ================================================================== [ 30.779268] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.780363] Read of size 8 at addr ffff88800e927ed8 by task sshd/219 [ 30.781237] [ 30.781462] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.782422] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.783610] Call Trace: [ 30.783944] [ 30.784237] dump_stack_lvl+0x91/0xf0 [ 30.784743] print_report+0xcc/0x620 [ 30.785234] ? __virt_addr_valid+0x102/0x340 [ 30.785818] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.786526] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.787197] kasan_report+0xbe/0xf0 [ 30.787669] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.788410] vma_interval_tree_remove+0xc75/0xec0 [ 30.789129] vma_prepare+0xc54/0x11a0 [ 30.789633] __split_vma+0x5af/0x950 [ 30.790165] ? __pfx___split_vma+0x10/0x10 [ 30.790718] ? find_held_lock+0x2c/0x110 [ 30.791238] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.791907] ? lock_is_held_type+0x9f/0x120 [ 30.792569] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.793252] ? mtree_range_walk+0x632/0x900 [ 30.793839] ? mas_walk+0x5c7/0x7c0 [ 30.794313] do_vmi_munmap+0x1f1/0x2b0 [ 30.794810] mmap_region+0x1f9/0x2660 [ 30.795303] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.795821] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.796578] ? __pfx_lock_acquire+0x10/0x10 [ 30.797122] ? __pfx_mmap_region+0x10/0x10 [ 30.797691] ? security_mmap_addr+0x7d/0xa0 [ 30.798228] ? get_unmapped_area+0x1f5/0x3f0 [ 30.798773] do_mmap+0x854/0xf00 [ 30.799222] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.799734] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.800295] ksys_mmap_pgoff+0x3af/0x500 [ 30.800808] do_syscall_64+0x3f/0x90 [ 30.801288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.801941] RIP: 0033:0x7f9557e3fd82 [ 30.802406] 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 [ 30.804586] RSP: 002b:00007ffeb9b04e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.805540] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9557e3fd82 [ 30.806433] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9557279000 [ 30.807272] RBP: 00007f9557279000 R08: 0000000000000009 R09: 0000000000001000 [ 30.808108] R10: 0000000000000812 R11: 0000000000000206 R12: 00005593e02b8ec0 [ 30.808961] R13: 00007ffeb9b04e50 R14: 00007ffeb9b04e80 R15: 00007ffeb9b051e0 [ 30.809824] [ 30.810119] [ 30.810335] Allocated by task 212: [ 30.810776] kasan_save_stack+0x22/0x50 [ 30.811307] kasan_set_track+0x25/0x30 [ 30.811820] __kasan_slab_alloc+0x59/0x70 [ 30.812361] kmem_cache_alloc+0x16b/0x370 [ 30.812895] vm_area_dup+0x20/0x160 [ 30.813353] __split_vma+0x170/0x950 [ 30.813839] split_vma+0xc6/0x110 [ 30.814290] mprotect_fixup+0x8d2/0xb30 [ 30.814805] do_mprotect_pkey+0x87e/0xd40 [ 30.815332] __x64_sys_mprotect+0x78/0xc0 [ 30.815874] do_syscall_64+0x3f/0x90 [ 30.816368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.817023] [ 30.817243] Freed by task 212: [ 30.817672] kasan_save_stack+0x22/0x50 [ 30.818194] kasan_set_track+0x25/0x30 [ 30.818703] kasan_save_free_info+0x2b/0x50 [ 30.819257] __kasan_slab_free+0x10a/0x190 [ 30.819800] kmem_cache_free+0x10d/0x4d0 [ 30.820320] rcu_core+0x8c8/0x2860 [ 30.820768] __do_softirq+0x1b7/0x7d4 [ 30.821244] [ 30.821459] Last potentially related work creation: [ 30.822073] kasan_save_stack+0x22/0x50 [ 30.822598] __kasan_record_aux_stack+0x8e/0xa0 [ 30.823269] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.823933] remove_vma+0x139/0x170 [ 30.824386] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.824950] do_vmi_munmap+0x1f1/0x2b0 [ 30.825462] __vm_munmap+0x138/0x3a0 [ 30.825959] __x64_sys_munmap+0x59/0x80 [ 30.826467] do_syscall_64+0x3f/0x90 [ 30.826952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827617] [ 30.827837] Second to last potentially related work creation: [ 30.828525] kasan_save_stack+0x22/0x50 [ 30.829031] __kasan_record_aux_stack+0x8e/0xa0 [ 30.829605] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.830259] remove_vma+0x139/0x170 [ 30.830722] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.831285] do_vmi_munmap+0x1f1/0x2b0 [ 30.831765] mmap_region+0x1f9/0x2660 [ 30.832248] do_mmap+0x854/0xf00 [ 30.832676] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.833170] ksys_mmap_pgoff+0x3af/0x500 [ 30.833670] do_syscall_64+0x3f/0x90 [ 30.834144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.834783] [ 30.834999] The buggy address belongs to the object at ffff88800e927e80 [ 30.834999] which belongs to the cache vm_area_struct of size 168 [ 30.836472] The buggy address is located 88 bytes inside of [ 30.836472] freed 168-byte region [ffff88800e927e80, ffff88800e927f28) [ 30.837886] [ 30.838100] The buggy address belongs to the physical page: [ 30.838756] page:00000000ea464196 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe927 [ 30.839839] memcg:ffff88800de69801 [ 30.840262] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.840959] page_type: 0xffffffff() [ 30.841403] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b5840 dead000000000005 [ 30.842321] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de69801 [ 30.843234] page dumped because: kasan: bad access detected [ 30.843909] [ 30.844128] Memory state around the buggy address: [ 30.844714] ffff88800e927d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.845607] ffff88800e927e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.846493] >ffff88800e927e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.847347] ^ [ 30.848068] ffff88800e927f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.848925] ffff88800e927f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.849771] ================================================================== [ 30.850783] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.318687] BUG: Bad rss-counter state mm:00000000db511071 type:MM_FILEPAGES val:33 [ 33.319946] BUG: Bad rss-counter state mm:00000000db511071 type:MM_ANONPAGES val:22 [ 33.739631] BUG: Bad rss-counter state mm:0000000042eee0c9 type:MM_FILEPAGES val:33 [ 33.740854] BUG: Bad rss-counter state mm:0000000042eee0c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45560' (ECDSA) to the list of known hosts. 2023/06/20 20:49:07 fuzzer started 2023/06/20 20:49:07 dialing manager at localhost:36067 2023/06/20 20:49:07 checking machine... 2023/06/20 20:49:07 checking revisions... [ 34.558336] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:49:07 testing simple program... [ 34.611708] cgroup: Unknown subsys name 'net' [ 34.660693] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:49:07 Registers: info registers vcpu 0 RAX=ffffed100d9c5735 RBX=ffff88806ce2b9c0 RCX=0000000000000000 RDX=ffff888015b73680 RSI=ffffffff813be978 RDI=0000000000000005 RBP=0000000000000002 RSP=ffff88806ce09ea8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000003 R11=0000000000000001 R12=7fffffffffffffff R13=7fffffffffffffff R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff814c0864 RFL=00000086 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f39c98d4900 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=00007f39ca428044 CR3=0000000018486000 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=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=f5a8fd1eefda75edaa1b7672990cde36 XMM04=9a2fa702b23474de958e59331e365b8a XMM05=00000000000000000000000000000000 XMM06=9a2fa702b23474de951b59331e0c5b36 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f801b085000 CR3=000000000cd1e000 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=0f05d4e0c4d06b87b64ac0bf4262f8f0 XMM02=ec2efd57dc4c00df000000000011a920 XMM03=75c5eb125aae0a31000000000011a9f0 XMM04=0b225e434d1b60f200000000000ae988 XMM05=05518c3677437f2500000000001337c8 XMM06=806171799158d96700000000001324f8 XMM07=e042d86d42eb936e00000000001216b0 XMM08=75c5eb125aae0a31000000000011a9f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000