[ 32.591935] BUG: Bad rss-counter state mm:00000000f3d12e15 type:MM_FILEPAGES val:33 [ 32.593483] BUG: Bad rss-counter state mm:00000000f3d12e15 type:MM_ANONPAGES val:22 [ 32.778352] ================================================================== [ 32.779446] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.780644] Read of size 8 at addr ffff8880068353f8 by task sshd/219 [ 32.781463] [ 32.781679] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.782559] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.783521] Call Trace: [ 32.783840] [ 32.784125] dump_stack_lvl+0x91/0xf0 [ 32.784612] print_report+0xcc/0x620 [ 32.785094] ? __virt_addr_valid+0x102/0x340 [ 32.785649] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.786272] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.786888] kasan_report+0xbe/0xf0 [ 32.787362] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.787978] vma_interval_tree_remove+0xc75/0xec0 [ 32.788586] vma_prepare+0xc54/0x11a0 [ 32.789078] __split_vma+0x5af/0x950 [ 32.789549] ? __pfx___split_vma+0x10/0x10 [ 32.790123] ? find_held_lock+0x2c/0x110 [ 32.790656] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.791247] ? lock_is_held_type+0x9f/0x120 [ 32.791789] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.792431] ? mtree_range_walk+0x632/0x900 [ 32.792984] ? mas_walk+0x5c7/0x7c0 [ 32.793453] do_vmi_munmap+0x1f1/0x2b0 [ 32.793949] mmap_region+0x1f9/0x2660 [ 32.794437] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.794960] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.795684] ? __pfx_lock_acquire+0x10/0x10 [ 32.796224] ? __pfx_mmap_region+0x10/0x10 [ 32.796758] ? security_mmap_addr+0x7d/0xa0 [ 32.797291] ? get_unmapped_area+0x1f5/0x3f0 [ 32.797851] do_mmap+0x854/0xf00 [ 32.798302] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.798804] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.799388] ksys_mmap_pgoff+0x3af/0x500 [ 32.799900] do_syscall_64+0x3f/0x90 [ 32.800384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.801051] RIP: 0033:0x7f3539aa2d82 [ 32.801521] 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 [ 32.803698] RSP: 002b:00007ffc6230cab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.804609] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3539aa2d82 [ 32.805525] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3538edc000 [ 32.806431] RBP: 00007f3538edc000 R08: 0000000000000009 R09: 0000000000001000 [ 32.807340] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557170f66b20 [ 32.808264] R13: 00007ffc6230cad0 R14: 00007ffc6230cb00 R15: 00007ffc6230ce60 [ 32.809176] [ 32.809484] [ 32.809720] Allocated by task 212: [ 32.810192] kasan_save_stack+0x22/0x50 [ 32.810736] kasan_set_track+0x25/0x30 [ 32.811261] __kasan_slab_alloc+0x59/0x70 [ 32.811818] kmem_cache_alloc+0x16b/0x370 [ 32.812376] vm_area_dup+0x20/0x160 [ 32.812851] __split_vma+0x170/0x950 [ 32.813354] split_vma+0xc6/0x110 [ 32.813806] mprotect_fixup+0x8d2/0xb30 [ 32.814344] do_mprotect_pkey+0x87e/0xd40 [ 32.814888] __x64_sys_mprotect+0x78/0xc0 [ 32.815439] do_syscall_64+0x3f/0x90 [ 32.815924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.816602] [ 32.816827] Freed by task 203: [ 32.817238] kasan_save_stack+0x22/0x50 [ 32.817754] kasan_set_track+0x25/0x30 [ 32.818279] kasan_save_free_info+0x2b/0x50 [ 32.818830] __kasan_slab_free+0x10a/0x190 [ 32.819385] kmem_cache_free+0x10d/0x4d0 [ 32.819913] rcu_core+0x8c8/0x2860 [ 32.820380] __do_softirq+0x1b7/0x7d4 [ 32.820883] [ 32.821110] Last potentially related work creation: [ 32.821724] kasan_save_stack+0x22/0x50 [ 32.822273] __kasan_record_aux_stack+0x8e/0xa0 [ 32.822876] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.823548] remove_vma+0x139/0x170 [ 32.824026] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.824602] do_vmi_munmap+0x1f1/0x2b0 [ 32.825117] __vm_munmap+0x138/0x3a0 [ 32.825600] __x64_sys_munmap+0x59/0x80 [ 32.826144] do_syscall_64+0x3f/0x90 [ 32.826645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.827318] [ 32.827545] Second to last potentially related work creation: [ 32.828261] kasan_save_stack+0x22/0x50 [ 32.828788] __kasan_record_aux_stack+0x8e/0xa0 [ 32.829390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.830081] remove_vma+0x139/0x170 [ 32.830555] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.831144] do_vmi_munmap+0x1f1/0x2b0 [ 32.831654] mmap_region+0x1f9/0x2660 [ 32.832154] do_mmap+0x854/0xf00 [ 32.832602] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.833111] ksys_mmap_pgoff+0x3af/0x500 [ 32.833636] do_syscall_64+0x3f/0x90 [ 32.834140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.834807] [ 32.835032] The buggy address belongs to the object at ffff8880068353a0 [ 32.835032] which belongs to the cache vm_area_struct of size 168 [ 32.836571] The buggy address is located 88 bytes inside of [ 32.836571] freed 168-byte region [ffff8880068353a0, ffff888006835448) [ 32.838072] [ 32.838296] The buggy address belongs to the physical page: [ 32.838997] page:00000000490c99fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6835 [ 32.840142] memcg:ffff88800682e501 [ 32.840589] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.841260] page_type: 0xffffffff() [ 32.841733] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 32.842713] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800682e501 [ 32.843666] page dumped because: kasan: bad access detected [ 32.844365] [ 32.844588] Memory state around the buggy address: [ 32.845198] ffff888006835280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.846113] ffff888006835300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.847013] >ffff888006835380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.847901] ^ [ 32.848781] ffff888006835400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.849669] ffff888006835480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.850573] ================================================================== [ 32.851578] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.527716] BUG: Bad rss-counter state mm:00000000465aeb83 type:MM_FILEPAGES val:33 [ 35.528645] BUG: Bad rss-counter state mm:00000000465aeb83 type:MM_ANONPAGES val:22 [ 36.087627] BUG: Bad rss-counter state mm:000000009d23276e type:MM_FILEPAGES val:33 [ 36.088798] BUG: Bad rss-counter state mm:000000009d23276e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56913' (ECDSA) to the list of known hosts. 2023/06/19 14:05:53 fuzzer started 2023/06/19 14:05:54 dialing manager at localhost:44161 2023/06/19 14:05:54 checking machine... 2023/06/19 14:05:54 checking revisions... [ 36.784310] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:05:54 testing simple program... [ 36.830274] cgroup: Unknown subsys name 'net' [ 36.873031] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:05:52 Registers: info registers vcpu 0 RAX=ffffffff83c233f0 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800fec7901 RSI=ffff88800fec79b8 RDI=ffff88800fec79b8 RBP=ffff88800fec7540 RSP=ffff88800fec7478 R8 =ffffffff86411328 R9 =ffff88800fec7528 R10=0000000000038001 R11=000000000009a7e4 R12=ffff88800fec7548 R13=ffff88800fec7530 R14=ffff88800fec79c0 R15=ffff88800fec74e8 RIP=ffffffff81131041 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4b95d6c700 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=00007f9a04eb5650 CR3=000000000fddc000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732033353a3530 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363138 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85616740 RBP=ffff888008d71b40 RSP=ffff888008d87d60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffffed10011ae368 R13=ffff88806cf35000 R14=0000000000000000 R15=ffff888008d71b40 RIP=ffffffff812dffce 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 =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=00007fff9e2a2ac8 CR3=000000000fddc000 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=2033353a35303a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a35303a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000