[ 30.536037] BUG: Bad rss-counter state mm:0000000092890f8e type:MM_FILEPAGES val:33 [ 30.536713] BUG: Bad rss-counter state mm:0000000092890f8e type:MM_ANONPAGES val:22 [ 30.734162] ================================================================== [ 30.734841] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.735520] Read of size 8 at addr ffff888009468228 by task sshd/220 [ 30.740032] [ 30.740199] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.740823] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.741534] Call Trace: [ 30.741776] [ 30.741984] dump_stack_lvl+0x91/0xf0 [ 30.742345] print_report+0xcc/0x620 [ 30.742708] ? __virt_addr_valid+0x102/0x340 [ 30.743121] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.743567] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.744058] kasan_report+0xbe/0xf0 [ 30.744411] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.744875] vma_interval_tree_remove+0xc75/0xec0 [ 30.745321] vma_prepare+0xc54/0x11a0 [ 30.745674] __split_vma+0x5af/0x950 [ 30.746025] ? __pfx___split_vma+0x10/0x10 [ 30.746419] ? find_held_lock+0x2c/0x110 [ 30.746808] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.747233] ? lock_is_held_type+0x9f/0x120 [ 30.747642] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.748124] ? mtree_range_walk+0x632/0x900 [ 30.748531] ? mas_walk+0x5c7/0x7c0 [ 30.748881] do_vmi_munmap+0x1f1/0x2b0 [ 30.749250] mmap_region+0x1f9/0x2660 [ 30.749609] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.749990] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.750517] ? __pfx_lock_acquire+0x10/0x10 [ 30.750913] ? __pfx_mmap_region+0x10/0x10 [ 30.751304] ? security_mmap_addr+0x7d/0xa0 [ 30.751703] ? get_unmapped_area+0x1f5/0x3f0 [ 30.756148] do_mmap+0x854/0xf00 [ 30.756469] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.756827] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.757230] ksys_mmap_pgoff+0x3af/0x500 [ 30.757596] do_syscall_64+0x3f/0x90 [ 30.757950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.758426] RIP: 0033:0x7f3e4789bd82 [ 30.758755] 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 [ 30.760327] RSP: 002b:00007ffd8f275388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.760983] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e4789bd82 [ 30.761603] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e46cd5000 [ 30.762226] RBP: 00007f3e46cd5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.762850] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558498b2bf60 [ 30.763467] R13: 00007ffd8f2753a0 R14: 00007ffd8f2753d0 R15: 00007ffd8f275730 [ 30.764108] [ 30.764305] [ 30.764448] Allocated by task 212: [ 30.764730] kasan_save_stack+0x22/0x50 [ 30.765066] kasan_set_track+0x25/0x30 [ 30.765394] __kasan_slab_alloc+0x59/0x70 [ 30.765740] kmem_cache_alloc+0x16b/0x370 [ 30.766078] vm_area_dup+0x20/0x160 [ 30.766377] __split_vma+0x170/0x950 [ 30.766677] split_vma+0xc6/0x110 [ 30.766968] mprotect_fixup+0x8d2/0xb30 [ 30.767298] do_mprotect_pkey+0x87e/0xd40 [ 30.767640] __x64_sys_mprotect+0x78/0xc0 [ 30.768039] do_syscall_64+0x3f/0x90 [ 30.768383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.768857] [ 30.769021] Freed by task 0: [ 30.769295] kasan_save_stack+0x22/0x50 [ 30.769657] kasan_set_track+0x25/0x30 [ 30.770027] kasan_save_free_info+0x2b/0x50 [ 30.770419] __kasan_slab_free+0x10a/0x190 [ 30.770810] kmem_cache_free+0x10d/0x4d0 [ 30.771193] rcu_core+0x8c8/0x2860 [ 30.771523] __do_softirq+0x1b7/0x7d4 [ 30.771910] [ 30.772067] Last potentially related work creation: [ 30.772497] kasan_save_stack+0x22/0x50 [ 30.772876] __kasan_record_aux_stack+0x8e/0xa0 [ 30.773304] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.773774] remove_vma+0x139/0x170 [ 30.774111] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.774525] do_vmi_munmap+0x1f1/0x2b0 [ 30.774877] __vm_munmap+0x138/0x3a0 [ 30.775234] __x64_sys_munmap+0x59/0x80 [ 30.775608] do_syscall_64+0x3f/0x90 [ 30.775984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.776464] [ 30.776626] The buggy address belongs to the object at ffff8880094681d0 [ 30.776626] which belongs to the cache vm_area_struct of size 168 [ 30.777708] The buggy address is located 88 bytes inside of [ 30.777708] freed 168-byte region [ffff8880094681d0, ffff888009468278) [ 30.778750] [ 30.778902] The buggy address belongs to the physical page: [ 30.779383] page:00000000f2ab4129 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9468 [ 30.780228] memcg:ffff88800d6d7901 [ 30.780546] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.781062] page_type: 0xffffffff() [ 30.781385] raw: 0100000000000200 ffff8880087a0c80 ffffea0000314800 dead000000000009 [ 30.782079] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6d7901 [ 30.782761] page dumped because: kasan: bad access detected [ 30.783248] [ 30.783412] Memory state around the buggy address: [ 30.783864] ffff888009468100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.784497] ffff888009468180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.785135] >ffff888009468200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.785760] ^ [ 30.786180] ffff888009468280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.786818] ffff888009468300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.787450] ================================================================== [ 30.792348] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.995921] BUG: Bad rss-counter state mm:00000000103ef661 type:MM_FILEPAGES val:33 [ 34.996568] BUG: Bad rss-counter state mm:00000000103ef661 type:MM_ANONPAGES val:22 [ 35.494178] BUG: Bad rss-counter state mm:00000000a6bba0e1 type:MM_FILEPAGES val:33 [ 35.495154] BUG: Bad rss-counter state mm:00000000a6bba0e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25948' (ECDSA) to the list of known hosts. 2023/06/21 08:09:27 fuzzer started 2023/06/21 08:09:27 dialing manager at localhost:36067 2023/06/21 08:09:27 checking machine... 2023/06/21 08:09:27 checking revisions... [ 36.347928] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:09:27 testing simple program... [ 36.402511] cgroup: Unknown subsys name 'net' [ 36.491564] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:09:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffb087931a0 CR3=000000000cc94000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=8209c8f1f97959bf00000000001332c8 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=6157d6cc8e41778c00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000000000fd RDI=0000000000000001 RBP=ffff888016dffb78 RSP=ffff888016dffab0 R8 =0000000000000001 R9 =ffffed1002dbff62 R10=ffff888016dffb17 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007f98f733b900 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=00007f98f733b6f8 CR3=000000000fd5c000 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