[ 33.797553] BUG: Bad rss-counter state mm:00000000802c7b17 type:MM_FILEPAGES val:33 [ 33.798229] BUG: Bad rss-counter state mm:00000000802c7b17 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.960065] ================================================================== [ 33.960660] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.961259] Read of size 8 at addr ffff88800d57fdf0 by task sshd/220 [ 33.962337] [ 33.962485] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.963099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.964089] Call Trace: [ 33.964297] [ 33.964490] dump_stack_lvl+0x91/0xf0 [ 33.964862] print_report+0xcc/0x620 [ 33.965179] ? __virt_addr_valid+0x102/0x340 [ 33.965612] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.966017] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.966416] kasan_report+0xbe/0xf0 [ 33.966768] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.967165] vma_interval_tree_remove+0xc75/0xec0 [ 33.967561] vma_prepare+0xc54/0x11a0 [ 33.967917] __split_vma+0x5af/0x950 [ 33.968218] ? __pfx___split_vma+0x10/0x10 [ 33.968558] ? find_held_lock+0x2c/0x110 [ 33.968948] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.969307] ? lock_is_held_type+0x9f/0x120 [ 33.971996] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.972383] ? mtree_range_walk+0x632/0x900 [ 33.972788] ? mas_walk+0x5c7/0x7c0 [ 33.973094] do_vmi_munmap+0x1f1/0x2b0 [ 33.973411] mmap_region+0x1f9/0x2660 [ 33.973800] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.974122] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.974620] ? __pfx_lock_acquire+0x10/0x10 [ 33.974965] ? __pfx_mmap_region+0x10/0x10 [ 33.975299] ? security_mmap_addr+0x7d/0xa0 [ 33.975692] ? get_unmapped_area+0x1f5/0x3f0 [ 33.976036] do_mmap+0x854/0xf00 [ 33.976313] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.976686] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.977043] ksys_mmap_pgoff+0x3af/0x500 [ 33.977366] do_syscall_64+0x3f/0x90 [ 33.977754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.978164] RIP: 0033:0x7fc0ab118d82 [ 33.978462] 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 [ 33.979897] RSP: 002b:00007ffe32970fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.980474] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc0ab118d82 [ 33.981055] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0aa552000 [ 33.981665] RBP: 00007fc0aa552000 R08: 0000000000000009 R09: 0000000000001000 [ 33.982192] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556507ea6ec0 [ 33.982766] R13: 00007ffe32970fe0 R14: 00007ffe32971010 R15: 00007ffe32971370 [ 33.983298] [ 33.983494] [ 33.983688] Allocated by task 213: [ 33.983959] kasan_save_stack+0x22/0x50 [ 33.984288] kasan_set_track+0x25/0x30 [ 33.984656] __kasan_slab_alloc+0x59/0x70 [ 33.984988] kmem_cache_alloc+0x16b/0x370 [ 33.985315] vm_area_dup+0x20/0x160 [ 33.985690] __split_vma+0x170/0x950 [ 33.985990] split_vma+0xc6/0x110 [ 33.986303] mprotect_fixup+0x8d2/0xb30 [ 33.986678] do_mprotect_pkey+0x87e/0xd40 [ 33.987010] __x64_sys_mprotect+0x78/0xc0 [ 33.987346] do_syscall_64+0x3f/0x90 [ 33.987704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.988108] [ 33.988245] Freed by task 213: [ 33.988503] kasan_save_stack+0x22/0x50 [ 33.988879] kasan_set_track+0x25/0x30 [ 33.989196] kasan_save_free_info+0x2b/0x50 [ 33.989558] __kasan_slab_free+0x10a/0x190 [ 33.989985] kmem_cache_free+0x10d/0x4d0 [ 33.990341] rcu_core+0x8c8/0x2860 [ 33.990723] __do_softirq+0x1b7/0x7d4 [ 33.991051] [ 33.991205] Last potentially related work creation: [ 33.991652] kasan_save_stack+0x22/0x50 [ 33.991975] __kasan_record_aux_stack+0x8e/0xa0 [ 33.992378] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.992887] remove_vma+0x139/0x170 [ 33.993198] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.993638] do_vmi_munmap+0x1f1/0x2b0 [ 33.993951] __vm_munmap+0x138/0x3a0 [ 33.994282] __x64_sys_munmap+0x59/0x80 [ 33.994651] do_syscall_64+0x3f/0x90 [ 33.994968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.995426] [ 33.995648] Second to last potentially related work creation: [ 33.996140] kasan_save_stack+0x22/0x50 [ 33.996512] __kasan_record_aux_stack+0x8e/0xa0 [ 33.996978] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.997462] remove_vma+0x139/0x170 [ 33.997836] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.998223] do_vmi_munmap+0x1f1/0x2b0 [ 33.998613] mmap_region+0x1f9/0x2660 [ 33.999097] do_mmap+0x854/0xf00 [ 33.999407] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.999823] ksys_mmap_pgoff+0x3af/0x500 [ 34.000185] do_syscall_64+0x3f/0x90 [ 34.000533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.001026] [ 34.001183] The buggy address belongs to the object at ffff88800d57fd98 [ 34.001183] which belongs to the cache vm_area_struct of size 168 [ 34.002303] The buggy address is located 88 bytes inside of [ 34.002303] freed 168-byte region [ffff88800d57fd98, ffff88800d57fe40) [ 34.003468] [ 34.003681] The buggy address belongs to the physical page: [ 34.004165] page:000000001ddf1f79 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd57f [ 34.005011] memcg:ffff888014159801 [ 34.005368] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.005870] page_type: 0xffffffff() [ 34.006162] raw: 0100000000000200 ffff88800879fc80 ffffea00003be5c0 dead000000000004 [ 34.006798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014159801 [ 34.007436] page dumped because: kasan: bad access detected [ 34.008064] [ 34.008216] Memory state around the buggy address: [ 34.008700] ffff88800d57fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 34.009319] ffff88800d57fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 34.010006] >ffff88800d57fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.010661] ^ [ 34.011209] ffff88800d57fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.011836] ffff88800d57fe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.012426] ================================================================== [ 34.019115] Disabling lock debugging due to kernel taint [ 36.554612] BUG: Bad rss-counter state mm:0000000096644393 type:MM_FILEPAGES val:33 [ 36.555268] BUG: Bad rss-counter state mm:0000000096644393 type:MM_ANONPAGES val:22 [ 37.620359] BUG: Bad rss-counter state mm:0000000026037b46 type:MM_FILEPAGES val:33 [ 37.621360] BUG: Bad rss-counter state mm:0000000026037b46 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11575' (ECDSA) to the list of known hosts. 2023/06/20 10:16:36 fuzzer started 2023/06/20 10:16:36 dialing manager at localhost:44161 2023/06/20 10:16:36 checking machine... 2023/06/20 10:16:36 checking revisions... [ 38.557606] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:16:37 testing simple program... [ 38.631508] cgroup: Unknown subsys name 'net' [ 38.717547] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:16:32 Registers: info registers vcpu 0 RAX=00000000384e0138 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000017 RSI=ffffffff813c7dd8 RDI=ffffffff85497f20 RBP=ffff88806ce09db8 RSP=ffff88806ce09cf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=ffffffffffffffff R13=ffffffffffffffff R14=00000017379c30d0 R15=0000000000000000 RIP=ffffffff810a48a7 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 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=00007f8323b09328 CR3=000000000c468000 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=7473207265746e756f632d7373722064 XMM04=61203530203763203030206631206630 XMM05=6666206666203066203030206433203e XMM06=30302039302038622066652039382038 XMM07=00000000000000000000000000000000 XMM08=6c61762053454741504e4f4e415f4d4d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffe147feefa CR3=0000000009746000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000