[ 35.424059] BUG: Bad rss-counter state mm:00000000442c20bb type:MM_FILEPAGES val:33 [ 35.425533] BUG: Bad rss-counter state mm:00000000442c20bb type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.595288] ================================================================== [ 35.596222] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.597174] Read of size 8 at addr ffff88800eebadf0 by task sshd/220 [ 35.598071] [ 35.598293] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.599165] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.600157] Call Trace: [ 35.600479] <TASK> [ 35.600770] dump_stack_lvl+0x91/0xf0 [ 35.601264] print_report+0xcc/0x620 [ 35.601778] ? __virt_addr_valid+0x102/0x340 [ 35.602339] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.602963] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.603577] kasan_report+0xbe/0xf0 [ 35.604056] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.604680] vma_interval_tree_remove+0xc75/0xec0 [ 35.605288] vma_prepare+0xc54/0x11a0 [ 35.605783] __split_vma+0x5af/0x950 [ 35.606260] ? __pfx___split_vma+0x10/0x10 [ 35.606799] ? find_held_lock+0x2c/0x110 [ 35.607330] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.607891] ? lock_is_held_type+0x9f/0x120 [ 35.608433] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.609051] ? mtree_range_walk+0x632/0x900 [ 35.609620] ? mas_walk+0x5c7/0x7c0 [ 35.610100] do_vmi_munmap+0x1f1/0x2b0 [ 35.610602] mmap_region+0x1f9/0x2660 [ 35.611084] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.611602] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.612319] ? __pfx_lock_acquire+0x10/0x10 [ 35.612848] ? __pfx_mmap_region+0x10/0x10 [ 35.613410] ? security_mmap_addr+0x7d/0xa0 [ 35.613944] ? get_unmapped_area+0x1f5/0x3f0 [ 35.614495] do_mmap+0x854/0xf00 [ 35.614940] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.615438] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.616009] ksys_mmap_pgoff+0x3af/0x500 [ 35.616521] do_syscall_64+0x3f/0x90 [ 35.617008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.617668] RIP: 0033:0x7f589082cd82 [ 35.618133] 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 [ 35.620285] RSP: 002b:00007ffe7990d568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.621208] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f589082cd82 [ 35.622081] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f588fc66000 [ 35.622931] RBP: 00007f588fc66000 R08: 0000000000000009 R09: 0000000000001000 [ 35.623787] R10: 0000000000000812 R11: 0000000000000206 R12: 000055faa3cf1f70 [ 35.624645] R13: 00007ffe7990d580 R14: 00007ffe7990d5b0 R15: 00007ffe7990d910 [ 35.625532] </TASK> [ 35.625826] [ 35.626047] Allocated by task 213: [ 35.626477] kasan_save_stack+0x22/0x50 [ 35.626994] kasan_set_track+0x25/0x30 [ 35.627484] __kasan_slab_alloc+0x59/0x70 [ 35.628013] kmem_cache_alloc+0x16b/0x370 [ 35.628545] vm_area_dup+0x20/0x160 [ 35.629003] __split_vma+0x170/0x950 [ 35.629483] split_vma+0xc6/0x110 [ 35.629933] mprotect_fixup+0x8d2/0xb30 [ 35.630444] do_mprotect_pkey+0x87e/0xd40 [ 35.630968] __x64_sys_mprotect+0x78/0xc0 [ 35.631493] do_syscall_64+0x3f/0x90 [ 35.631968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.632619] [ 35.632836] Freed by task 19: [ 35.633223] kasan_save_stack+0x22/0x50 [ 35.633748] kasan_set_track+0x25/0x30 [ 35.634253] kasan_save_free_info+0x2b/0x50 [ 35.634781] __kasan_slab_free+0x10a/0x190 [ 35.635312] kmem_cache_free+0x10d/0x4d0 [ 35.635816] rcu_core+0x8c8/0x2860 [ 35.636267] __do_softirq+0x1b7/0x7d4 [ 35.636744] [ 35.636968] Last potentially related work creation: [ 35.637569] kasan_save_stack+0x22/0x50 [ 35.638077] __kasan_record_aux_stack+0x8e/0xa0 [ 35.638661] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.639310] remove_vma+0x139/0x170 [ 35.639777] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.640341] do_vmi_munmap+0x1f1/0x2b0 [ 35.640834] __vm_munmap+0x138/0x3a0 [ 35.641298] __x64_sys_munmap+0x59/0x80 [ 35.641822] do_syscall_64+0x3f/0x90 [ 35.642295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.642933] [ 35.643149] Second to last potentially related work creation: [ 35.643829] kasan_save_stack+0x22/0x50 [ 35.644337] __kasan_record_aux_stack+0x8e/0xa0 [ 35.644919] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.645576] remove_vma+0x139/0x170 [ 35.646028] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.646581] do_vmi_munmap+0x1f1/0x2b0 [ 35.647071] mmap_region+0x1f9/0x2660 [ 35.647547] do_mmap+0x854/0xf00 [ 35.647983] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.648477] ksys_mmap_pgoff+0x3af/0x500 [ 35.648985] do_syscall_64+0x3f/0x90 [ 35.649474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.650121] [ 35.650339] The buggy address belongs to the object at ffff88800eebad98 [ 35.650339] which belongs to the cache vm_area_struct of size 168 [ 35.651820] The buggy address is located 88 bytes inside of [ 35.651820] freed 168-byte region [ffff88800eebad98, ffff88800eebae40) [ 35.653253] [ 35.653488] The buggy address belongs to the physical page: [ 35.654164] page:00000000a53918d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeeba [ 35.655254] memcg:ffff88800d196c01 [ 35.655690] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.656404] page_type: 0xffffffff() [ 35.656860] raw: 0100000000000200 ffff88800879fc80 ffffea00003268c0 dead000000000005 [ 35.657783] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d196c01 [ 35.658698] page dumped because: kasan: bad access detected [ 35.659373] [ 35.659587] Memory state around the buggy address: [ 35.660183] ffff88800eebac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.661062] ffff88800eebad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.661938] >ffff88800eebad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.662797] ^ [ 35.663623] ffff88800eebae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.664498] ffff88800eebae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.665371] ================================================================== [ 35.666522] Disabling lock debugging due to kernel taint [ 37.614911] BUG: Bad rss-counter state mm:0000000008df9149 type:MM_FILEPAGES val:33 [ 37.616040] BUG: Bad rss-counter state mm:0000000008df9149 type:MM_ANONPAGES val:22 [ 38.100174] BUG: Bad rss-counter state mm:00000000ecea3618 type:MM_FILEPAGES val:33 [ 38.101168] BUG: Bad rss-counter state mm:00000000ecea3618 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8606' (ECDSA) to the list of known hosts. 2023/06/20 03:06:26 fuzzer started 2023/06/20 03:06:26 dialing manager at localhost:44161 2023/06/20 03:06:26 checking machine... 2023/06/20 03:06:26 checking revisions... [ 38.828181] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:06:26 testing simple program... [ 38.875734] cgroup: Unknown subsys name 'net' [ 38.916172] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:06:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110018bd3ae RSI=0000000000000244 RDI=ffff88800c5e9d70 RBP=0000000000000000 RSP=ffff888016e0f868 R8 =ffffffff83c22dff R9 =0000000000000000 R10=0000000000000040 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888016e0fa38 R14=ffff88800c5e9d10 R15=0000000000000000 RIP=ffffffff8451daa9 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 00007f6dcb95a700 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=00007fe58d8e5618 CR3=000000000f740000 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=3a5d3932325b646873732036323a3630 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303232 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=ffff88806cf09a50 RCX=ffff88806cf09a70 RDX=1ffff1100d9e134f RSI=ffff888008e27dc0 RDI=ffff88806cf09a78 RBP=ffff888008e27dc0 RSP=ffff88806cf099a8 R8 =ffffffff864b115c R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b523e R12=0000000000000008 R13=ffff88806cf02000 R14=ffff888008e27dc8 R15=ffff88806cf09a50 RIP=ffffffff811304ae 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 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=00007f5145b5d8f0 CR3=000000000cb76000 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=725ed5f80a8be7924d403f0f98dab0cc XMM02=000000000011dca0eff9b2d0a8fce9cb XMM03=000000000011dd702c67c8bc2e329bc3 XMM04=d019fa360ea0a66a00000000000ae988 XMM05=bec15401c795670d0000000000135c90 XMM06=4fda316b135da52b00000000001349c0 XMM07=e042d86d42eb936e00000000001241b8 XMM08=26a9ab035c23f1ab000000000011dd70 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000