[ 27.421543] BUG: Bad rss-counter state mm:00000000d0f7d22a type:MM_FILEPAGES val:33 [ 27.422773] BUG: Bad rss-counter state mm:00000000d0f7d22a type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.541582] ================================================================== [ 27.542504] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.543465] Read of size 8 at addr ffff88800e9ca228 by task sshd/220 [ 27.544252] [ 27.544474] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.545452] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.546455] Call Trace: [ 27.546783] [ 27.547080] dump_stack_lvl+0x91/0xf0 [ 27.547616] print_report+0xcc/0x620 [ 27.548107] ? __virt_addr_valid+0x102/0x340 [ 27.548675] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.549292] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.549931] kasan_report+0xbe/0xf0 [ 27.550406] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.551035] vma_interval_tree_remove+0xc75/0xec0 [ 27.551655] vma_prepare+0xc54/0x11a0 [ 27.552136] __split_vma+0x5af/0x950 [ 27.552612] ? __pfx___split_vma+0x10/0x10 [ 27.553140] ? find_held_lock+0x2c/0x110 [ 27.553671] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.554250] ? lock_is_held_type+0x9f/0x120 [ 27.554789] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.555423] ? mtree_range_walk+0x632/0x900 [ 27.555978] ? mas_walk+0x5c7/0x7c0 [ 27.556455] do_vmi_munmap+0x1f1/0x2b0 [ 27.556956] mmap_region+0x1f9/0x2660 [ 27.557440] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.557961] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.558684] ? __pfx_lock_acquire+0x10/0x10 [ 27.559237] ? __pfx_mmap_region+0x10/0x10 [ 27.559771] ? security_mmap_addr+0x7d/0xa0 [ 27.560299] ? get_unmapped_area+0x1f5/0x3f0 [ 27.560859] do_mmap+0x854/0xf00 [ 27.561297] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.561792] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.562363] ksys_mmap_pgoff+0x3af/0x500 [ 27.562877] do_syscall_64+0x3f/0x90 [ 27.563374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.564063] RIP: 0033:0x7f9f563a2d82 [ 27.564519] 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 [ 27.566632] RSP: 002b:00007ffd951edc78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.567561] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9f563a2d82 [ 27.568409] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9f557dc000 [ 27.569257] RBP: 00007f9f557dc000 R08: 0000000000000009 R09: 0000000000001000 [ 27.570100] R10: 0000000000000812 R11: 0000000000000206 R12: 00005622f64e4ec0 [ 27.570945] R13: 00007ffd951edc90 R14: 00007ffd951edcc0 R15: 00007ffd951ee020 [ 27.571825] [ 27.572119] [ 27.572333] Allocated by task 213: [ 27.572770] kasan_save_stack+0x22/0x50 [ 27.573273] kasan_set_track+0x25/0x30 [ 27.573766] __kasan_slab_alloc+0x59/0x70 [ 27.574298] kmem_cache_alloc+0x16b/0x370 [ 27.574813] vm_area_dup+0x20/0x160 [ 27.575286] __split_vma+0x170/0x950 [ 27.575755] split_vma+0xc6/0x110 [ 27.576193] mprotect_fixup+0x8d2/0xb30 [ 27.576711] do_mprotect_pkey+0x87e/0xd40 [ 27.577236] __x64_sys_mprotect+0x78/0xc0 [ 27.577773] do_syscall_64+0x3f/0x90 [ 27.578251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.578907] [ 27.579125] Freed by task 13: [ 27.579521] kasan_save_stack+0x22/0x50 [ 27.580025] kasan_set_track+0x25/0x30 [ 27.580517] kasan_save_free_info+0x2b/0x50 [ 27.581048] __kasan_slab_free+0x10a/0x190 [ 27.581586] kmem_cache_free+0x10d/0x4d0 [ 27.582092] rcu_core+0x8c8/0x2860 [ 27.582536] __do_softirq+0x1b7/0x7d4 [ 27.583011] [ 27.583230] Last potentially related work creation: [ 27.583864] kasan_save_stack+0x22/0x50 [ 27.584375] __kasan_record_aux_stack+0x8e/0xa0 [ 27.584964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.585614] remove_vma+0x139/0x170 [ 27.586068] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.586626] do_vmi_munmap+0x1f1/0x2b0 [ 27.587115] __vm_munmap+0x138/0x3a0 [ 27.587605] __x64_sys_munmap+0x59/0x80 [ 27.588101] do_syscall_64+0x3f/0x90 [ 27.588573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.589225] [ 27.589438] The buggy address belongs to the object at ffff88800e9ca1d0 [ 27.589438] which belongs to the cache vm_area_struct of size 168 [ 27.590927] The buggy address is located 88 bytes inside of [ 27.590927] freed 168-byte region [ffff88800e9ca1d0, ffff88800e9ca278) [ 27.592358] [ 27.592575] The buggy address belongs to the physical page: [ 27.593239] page:0000000067cdff22 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9ca [ 27.594333] memcg:ffff88800d35e001 [ 27.594764] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.595432] page_type: 0xffffffff() [ 27.595884] raw: 0100000000000200 ffff88800879fc80 ffffea000038edc0 dead000000000008 [ 27.596798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d35e001 [ 27.597702] page dumped because: kasan: bad access detected [ 27.598365] [ 27.598581] Memory state around the buggy address: [ 27.599156] ffff88800e9ca100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.600022] ffff88800e9ca180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 27.600889] >ffff88800e9ca200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 27.601749] ^ [ 27.602315] ffff88800e9ca280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 27.603167] ffff88800e9ca300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 27.604081] ================================================================== [ 27.605121] Disabling lock debugging due to kernel taint [ 29.792070] BUG: Bad rss-counter state mm:000000007793f196 type:MM_FILEPAGES val:33 [ 29.793230] BUG: Bad rss-counter state mm:000000007793f196 type:MM_ANONPAGES val:22 [ 30.229064] BUG: Bad rss-counter state mm:00000000f4b7381d type:MM_FILEPAGES val:33 [ 30.230225] BUG: Bad rss-counter state mm:00000000f4b7381d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14119' (ECDSA) to the list of known hosts. 2023/06/19 18:48:46 fuzzer started 2023/06/19 18:48:46 dialing manager at localhost:44161 2023/06/19 18:48:46 checking machine... 2023/06/19 18:48:46 checking revisions... [ 30.858797] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:48:46 testing simple program... [ 30.909674] cgroup: Unknown subsys name 'net' [ 30.965456] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:48:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801665f2d8 RCX=0000000000000001 RDX=1ffff11002ccbe5c RSI=ffff88801665f6b0 RDI=ffff88801665f2e0 RBP=ffff88801665f6b0 RSP=ffff88801665f230 R8 =ffffffff86136d80 R9 =ffff88801665f318 R10=0000000000038001 R11=0000000000020c48 R12=0000000000000008 R13=ffff88801665f320 R14=ffff88801665f6b8 R15=ffff88801665f2d8 RIP=ffffffff81130445 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 00007f17667de900 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=00007f1766d95618 CR3=0000000019c72000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c58400 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=00007fdbc8d74030 CR3=0000000019cf4000 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=2035343a38343a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a38343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000