[ 30.546760] BUG: Bad rss-counter state mm:000000000e0b7e45 type:MM_FILEPAGES val:33 [ 30.548830] BUG: Bad rss-counter state mm:000000000e0b7e45 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.714856] ================================================================== [ 30.715781] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.716719] Read of size 8 at addr ffff88800ce6bc20 by task sshd/220 [ 30.717483] [ 30.717704] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.718721] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.719715] Call Trace: [ 30.720042] [ 30.720346] dump_stack_lvl+0x91/0xf0 [ 30.720833] print_report+0xcc/0x620 [ 30.721315] ? __virt_addr_valid+0x102/0x340 [ 30.721864] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.722505] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.723126] kasan_report+0xbe/0xf0 [ 30.723609] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.724236] vma_interval_tree_remove+0xc75/0xec0 [ 30.724835] vma_prepare+0xc54/0x11a0 [ 30.725311] __split_vma+0x5af/0x950 [ 30.725788] ? __pfx___split_vma+0x10/0x10 [ 30.726343] ? find_held_lock+0x2c/0x110 [ 30.726867] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.727431] ? lock_is_held_type+0x9f/0x120 [ 30.727975] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.728587] ? mtree_range_walk+0x632/0x900 [ 30.729137] ? mas_walk+0x5c7/0x7c0 [ 30.729619] do_vmi_munmap+0x1f1/0x2b0 [ 30.730113] mmap_region+0x1f9/0x2660 [ 30.730612] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.731145] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.731869] ? __pfx_lock_acquire+0x10/0x10 [ 30.732413] ? __pfx_mmap_region+0x10/0x10 [ 30.732939] ? security_mmap_addr+0x7d/0xa0 [ 30.733482] ? get_unmapped_area+0x1f5/0x3f0 [ 30.734039] do_mmap+0x854/0xf00 [ 30.734504] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.735000] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.735554] ksys_mmap_pgoff+0x3af/0x500 [ 30.736074] do_syscall_64+0x3f/0x90 [ 30.736548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.737203] RIP: 0033:0x7f6102bd0d82 [ 30.737669] 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 [ 30.739799] RSP: 002b:00007fffbe0b9bc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.740701] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6102bd0d82 [ 30.741559] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f610200a000 [ 30.742421] RBP: 00007f610200a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.743281] R10: 0000000000000812 R11: 0000000000000206 R12: 000056419c9baec0 [ 30.744163] R13: 00007fffbe0b9be0 R14: 00007fffbe0b9c10 R15: 00007fffbe0b9f70 [ 30.745037] [ 30.745342] [ 30.745570] Allocated by task 213: [ 30.746034] kasan_save_stack+0x22/0x50 [ 30.746576] kasan_set_track+0x25/0x30 [ 30.747100] __kasan_slab_alloc+0x59/0x70 [ 30.747649] kmem_cache_alloc+0x16b/0x370 [ 30.748190] vm_area_dup+0x20/0x160 [ 30.748663] __split_vma+0x170/0x950 [ 30.749148] split_vma+0xc6/0x110 [ 30.749607] mprotect_fixup+0x8d2/0xb30 [ 30.750133] do_mprotect_pkey+0x87e/0xd40 [ 30.750684] __x64_sys_mprotect+0x78/0xc0 [ 30.751235] do_syscall_64+0x3f/0x90 [ 30.751729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.752406] [ 30.752628] Freed by task 13: [ 30.753029] kasan_save_stack+0x22/0x50 [ 30.753559] kasan_set_track+0x25/0x30 [ 30.754072] kasan_save_free_info+0x2b/0x50 [ 30.754634] __kasan_slab_free+0x10a/0x190 [ 30.755191] kmem_cache_free+0x10d/0x4d0 [ 30.755733] rcu_core+0x8c8/0x2860 [ 30.756204] __do_softirq+0x1b7/0x7d4 [ 30.756701] [ 30.756922] Last potentially related work creation: [ 30.757542] kasan_save_stack+0x22/0x50 [ 30.758063] __kasan_record_aux_stack+0x8e/0xa0 [ 30.758688] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.759368] remove_vma+0x139/0x170 [ 30.759840] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.760432] do_vmi_munmap+0x1f1/0x2b0 [ 30.760941] __vm_munmap+0x138/0x3a0 [ 30.761440] __x64_sys_munmap+0x59/0x80 [ 30.761957] do_syscall_64+0x3f/0x90 [ 30.762467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.763145] [ 30.763367] Second to last potentially related work creation: [ 30.764088] kasan_save_stack+0x22/0x50 [ 30.764608] __kasan_record_aux_stack+0x8e/0xa0 [ 30.765221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.765903] remove_vma+0x139/0x170 [ 30.766399] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.766977] do_vmi_munmap+0x1f1/0x2b0 [ 30.767488] mmap_region+0x1f9/0x2660 [ 30.767992] do_mmap+0x854/0xf00 [ 30.768435] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.768944] ksys_mmap_pgoff+0x3af/0x500 [ 30.769481] do_syscall_64+0x3f/0x90 [ 30.769979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.770658] [ 30.770885] The buggy address belongs to the object at ffff88800ce6bbc8 [ 30.770885] which belongs to the cache vm_area_struct of size 168 [ 30.772437] The buggy address is located 88 bytes inside of [ 30.772437] freed 168-byte region [ffff88800ce6bbc8, ffff88800ce6bc70) [ 30.773913] [ 30.774134] The buggy address belongs to the physical page: [ 30.774840] page:00000000a50d5126 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xce6b [ 30.775971] memcg:ffff88800dfb6501 [ 30.776410] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.777085] page_type: 0xffffffff() [ 30.777550] raw: 0100000000000200 ffff88800879fc80 ffffea00003aeb40 dead000000000008 [ 30.778531] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfb6501 [ 30.779483] page dumped because: kasan: bad access detected [ 30.780175] [ 30.780398] Memory state around the buggy address: [ 30.781000] ffff88800ce6bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.781902] ffff88800ce6bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.782815] >ffff88800ce6bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.783705] ^ [ 30.784259] ffff88800ce6bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.785152] ffff88800ce6bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.786052] ================================================================== [ 30.787136] Disabling lock debugging due to kernel taint [ 32.649949] BUG: Bad rss-counter state mm:000000001c13cb99 type:MM_FILEPAGES val:33 [ 32.651091] BUG: Bad rss-counter state mm:000000001c13cb99 type:MM_ANONPAGES val:22 [ 33.090307] BUG: Bad rss-counter state mm:00000000859824a2 type:MM_FILEPAGES val:33 [ 33.091887] BUG: Bad rss-counter state mm:00000000859824a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23733' (ECDSA) to the list of known hosts. 2023/06/19 20:50:06 fuzzer started 2023/06/19 20:50:06 dialing manager at localhost:44161 2023/06/19 20:50:06 checking machine... 2023/06/19 20:50:06 checking revisions... [ 33.824962] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:50:06 testing simple program... [ 33.872260] cgroup: Unknown subsys name 'net' [ 33.921528] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:50:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000000e5 RCX=1ffff1100193d912 RDX=0000000000000010 RSI=ffff8880159387c0 RDI=ffff88800c9ec92c RBP=00000000000001d0 RSP=ffff88801802fc38 R8 =0000000000000001 R9 =ffff88800c9ec92c R10=ffff88800c9ec8e3 R11=00000000000b6996 R12=ffff88800deb9400 R13=0000000000000000 R14=ffff88800c9ec92c R15=ffff88800c9ec850 RIP=ffffffff844d2b3f RFL=00000286 [--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 00007f842e6d0900 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=00007ffe3936d000 CR3=000000000fcf4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f852e6c07e0 CR3=000000000dbde000 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=2035303a30353a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a30353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000