[ 33.412814] BUG: Bad rss-counter state mm:000000009fc9664a type:MM_FILEPAGES val:33 [ 33.413730] BUG: Bad rss-counter state mm:000000009fc9664a type:MM_ANONPAGES val:22 [ 33.575087] ================================================================== [ 33.576000] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.576940] Read of size 8 at addr ffff8880146c0c20 by task sshd/219 [ 33.577828] [ 33.578047] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.578929] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.579933] Call Trace: [ 33.580254] <TASK> [ 33.580537] dump_stack_lvl+0x91/0xf0 [ 33.581029] print_report+0xcc/0x620 [ 33.581511] ? __virt_addr_valid+0x102/0x340 [ 33.582066] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.582690] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.583315] kasan_report+0xbe/0xf0 [ 33.583795] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.584418] vma_interval_tree_remove+0xc75/0xec0 [ 33.585026] vma_prepare+0xc54/0x11a0 [ 33.585507] __split_vma+0x5af/0x950 [ 33.585975] ? __pfx___split_vma+0x10/0x10 [ 33.586498] ? find_held_lock+0x2c/0x110 [ 33.587038] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.587603] ? lock_is_held_type+0x9f/0x120 [ 33.588141] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.588749] ? mtree_range_walk+0x632/0x900 [ 33.589294] ? mas_walk+0x5c7/0x7c0 [ 33.589767] do_vmi_munmap+0x1f1/0x2b0 [ 33.590256] mmap_region+0x1f9/0x2660 [ 33.590750] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.591264] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.591974] ? __pfx_lock_acquire+0x10/0x10 [ 33.592504] ? __pfx_mmap_region+0x10/0x10 [ 33.593033] ? security_mmap_addr+0x7d/0xa0 [ 33.593566] ? get_unmapped_area+0x1f5/0x3f0 [ 33.594120] do_mmap+0x854/0xf00 [ 33.594559] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.595058] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.595617] ksys_mmap_pgoff+0x3af/0x500 [ 33.596122] do_syscall_64+0x3f/0x90 [ 33.596595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.597241] RIP: 0033:0x7f1d000a2d82 [ 33.597694] 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 [ 33.599822] RSP: 002b:00007ffc03c629d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.600735] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d000a2d82 [ 33.601580] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1cff4dc000 [ 33.602436] RBP: 00007f1cff4dc000 R08: 0000000000000009 R09: 0000000000001000 [ 33.603282] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e066674f70 [ 33.604121] R13: 00007ffc03c629f0 R14: 00007ffc03c62a20 R15: 00007ffc03c62d80 [ 33.604977] </TASK> [ 33.605267] [ 33.605481] Allocated by task 212: [ 33.605914] kasan_save_stack+0x22/0x50 [ 33.606420] kasan_set_track+0x25/0x30 [ 33.606932] __kasan_slab_alloc+0x59/0x70 [ 33.607454] kmem_cache_alloc+0x16b/0x370 [ 33.607974] vm_area_dup+0x20/0x160 [ 33.608426] __split_vma+0x170/0x950 [ 33.608892] split_vma+0xc6/0x110 [ 33.609327] mprotect_fixup+0x8d2/0xb30 [ 33.609825] do_mprotect_pkey+0x87e/0xd40 [ 33.610343] __x64_sys_mprotect+0x78/0xc0 [ 33.610867] do_syscall_64+0x3f/0x90 [ 33.611340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.611985] [ 33.612205] Freed by task 212: [ 33.612595] kasan_save_stack+0x22/0x50 [ 33.613099] kasan_set_track+0x25/0x30 [ 33.613592] kasan_save_free_info+0x2b/0x50 [ 33.614121] __kasan_slab_free+0x10a/0x190 [ 33.614671] kmem_cache_free+0x10d/0x4d0 [ 33.615185] rcu_core+0x8c8/0x2860 [ 33.615625] __do_softirq+0x1b7/0x7d4 [ 33.616104] [ 33.616319] Last potentially related work creation: [ 33.616908] kasan_save_stack+0x22/0x50 [ 33.617411] __kasan_record_aux_stack+0x8e/0xa0 [ 33.617985] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.618624] remove_vma+0x139/0x170 [ 33.619280] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.619990] do_vmi_munmap+0x1f1/0x2b0 [ 33.620575] __vm_munmap+0x138/0x3a0 [ 33.621157] __x64_sys_munmap+0x59/0x80 [ 33.621768] do_syscall_64+0x3f/0x90 [ 33.622359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.623215] [ 33.623481] The buggy address belongs to the object at ffff8880146c0bc8 [ 33.623481] which belongs to the cache vm_area_struct of size 168 [ 33.625314] The buggy address is located 88 bytes inside of [ 33.625314] freed 168-byte region [ffff8880146c0bc8, ffff8880146c0c70) [ 33.627081] [ 33.627356] The buggy address belongs to the physical page: [ 33.628164] page:00000000be3a4161 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146c0 [ 33.629482] memcg:ffff8880146c1001 [ 33.630007] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.630818] page_type: 0xffffffff() [ 33.631363] raw: 0100000000000200 ffff88800879fc80 ffffea00005af800 0000000000000006 [ 33.632471] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146c1001 [ 33.633569] page dumped because: kasan: bad access detected [ 33.634375] [ 33.634635] Memory state around the buggy address: [ 33.635339] ffff8880146c0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.636230] ffff8880146c0b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.637098] >ffff8880146c0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.637977] ^ [ 33.638511] ffff8880146c0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.639394] ffff8880146c0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.640261] ================================================================== [ 33.641261] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.748384] BUG: Bad rss-counter state mm:000000009a0088dd type:MM_FILEPAGES val:33 [ 35.749460] BUG: Bad rss-counter state mm:000000009a0088dd type:MM_ANONPAGES val:22 [ 36.191708] BUG: Bad rss-counter state mm:00000000be203a61 type:MM_FILEPAGES val:33 [ 36.192900] BUG: Bad rss-counter state mm:00000000be203a61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54169' (ECDSA) to the list of known hosts. 2023/06/19 22:45:22 fuzzer started 2023/06/19 22:45:22 dialing manager at localhost:44161 2023/06/19 22:45:22 checking machine... 2023/06/19 22:45:22 checking revisions... [ 36.877053] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:45:22 testing simple program... [ 36.917141] cgroup: Unknown subsys name 'net' [ 36.967473] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:45:12 Registers: info registers vcpu 0 RAX=1ffff11001e69613 RBX=ffff88800f34b068 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800f34b098 RBP=ffff88800ed1b2e0 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6c88 R12=dffffc0000000000 R13=ffff88800f100f18 R14=ffffffff813782a8 R15=ffff88800f100f18 RIP=ffffffff81846362 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2296ab3900 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=00007f2295ec0728 CR3=000000000c612000 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=7f20009f1f3c844f00000000000ae988 XMM05=3bcc8935391963b80000000000133d90 XMM06=dfcdbad4f1609c3700000000001328b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000010 RBX=0000000000000010 RCX=ffffffff8449f02b RDX=ffff88800f61d1c0 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff888019d86408 RSP=ffff88800f747ce8 R8 =0000000000000006 R9 =00007f7df3ad744c R10=00007f7df3ad3fff R11=0000000000000000 R12=0000000000000001 R13=000000000000000e R14=00007f7df3ad744c R15=00007f7df3ad3fff RIP=ffffffff8449f03b RFL=00000216 [----AP-] 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 00007f7df3a1b900 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=00007f7df3ad744c CR3=000000000ec60000 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