[ 23.680917] BUG: Bad rss-counter state mm:000000001aad055f type:MM_FILEPAGES val:33 [ 23.682080] BUG: Bad rss-counter state mm:000000001aad055f type:MM_ANONPAGES val:22 [ 23.795396] ================================================================== [ 23.796201] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.796954] Read of size 8 at addr ffff88800e341df0 by task sshd/220 [ 23.797717] [ 23.797899] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.798598] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.799390] Call Trace: [ 23.799658] [ 23.799883] dump_stack_lvl+0x91/0xf0 [ 23.800287] print_report+0xcc/0x620 [ 23.800694] ? __virt_addr_valid+0x102/0x340 [ 23.801151] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.801629] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.802083] kasan_report+0xbe/0xf0 [ 23.802434] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.802895] vma_interval_tree_remove+0xc75/0xec0 [ 23.803347] vma_prepare+0xc54/0x11a0 [ 23.803712] __split_vma+0x5af/0x950 [ 23.804064] ? __pfx___split_vma+0x10/0x10 [ 23.804452] ? find_held_lock+0x2c/0x110 [ 23.804837] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.805250] ? lock_is_held_type+0x9f/0x120 [ 23.805653] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.806101] ? mtree_range_walk+0x632/0x900 [ 23.806507] ? mas_walk+0x5c7/0x7c0 [ 23.806860] do_vmi_munmap+0x1f1/0x2b0 [ 23.807226] mmap_region+0x1f9/0x2660 [ 23.807600] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.807885] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.808278] ? __pfx_lock_acquire+0x10/0x10 [ 23.808574] ? __pfx_mmap_region+0x10/0x10 [ 23.808867] ? security_mmap_addr+0x7d/0xa0 [ 23.809157] ? get_unmapped_area+0x1f5/0x3f0 [ 23.809456] do_mmap+0x854/0xf00 [ 23.809697] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.809967] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.810279] ksys_mmap_pgoff+0x3af/0x500 [ 23.810558] do_syscall_64+0x3f/0x90 [ 23.810819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.811172] RIP: 0033:0x7f2557269d82 [ 23.811430] 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 [ 23.812587] RSP: 002b:00007ffca6058228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.813085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2557269d82 [ 23.813544] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25566a3000 [ 23.814002] RBP: 00007f25566a3000 R08: 0000000000000009 R09: 0000000000001000 [ 23.814461] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a8c3f6d90 [ 23.814926] R13: 00007ffca6058240 R14: 00007ffca6058270 R15: 00007ffca60585d0 [ 23.815400] [ 23.815564] [ 23.815687] Allocated by task 213: [ 23.815921] kasan_save_stack+0x22/0x50 [ 23.816198] kasan_set_track+0x25/0x30 [ 23.816466] __kasan_slab_alloc+0x59/0x70 [ 23.816753] kmem_cache_alloc+0x16b/0x370 [ 23.817034] vm_area_dup+0x20/0x160 [ 23.817290] __split_vma+0x170/0x950 [ 23.817551] split_vma+0xc6/0x110 [ 23.817792] mprotect_fixup+0x8d2/0xb30 [ 23.818067] do_mprotect_pkey+0x87e/0xd40 [ 23.818352] __x64_sys_mprotect+0x78/0xc0 [ 23.818636] do_syscall_64+0x3f/0x90 [ 23.818895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.819246] [ 23.819378] Freed by task 19: [ 23.819592] kasan_save_stack+0x22/0x50 [ 23.819864] kasan_set_track+0x25/0x30 [ 23.820138] kasan_save_free_info+0x2b/0x50 [ 23.820431] __kasan_slab_free+0x10a/0x190 [ 23.820722] kmem_cache_free+0x10d/0x4d0 [ 23.820999] rcu_core+0x8c8/0x2860 [ 23.821244] __do_softirq+0x1b7/0x7d4 [ 23.821506] [ 23.821627] Last potentially related work creation: [ 23.821945] kasan_save_stack+0x22/0x50 [ 23.822222] __kasan_record_aux_stack+0x8e/0xa0 [ 23.822536] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.822884] remove_vma+0x139/0x170 [ 23.823131] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.823446] do_vmi_munmap+0x1f1/0x2b0 [ 23.823722] __vm_munmap+0x138/0x3a0 [ 23.823977] __x64_sys_munmap+0x59/0x80 [ 23.824250] do_syscall_64+0x3f/0x90 [ 23.824509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.824865] [ 23.824985] The buggy address belongs to the object at ffff88800e341d98 [ 23.824985] which belongs to the cache vm_area_struct of size 168 [ 23.825783] The buggy address is located 88 bytes inside of [ 23.825783] freed 168-byte region [ffff88800e341d98, ffff88800e341e40) [ 23.826546] [ 23.826666] The buggy address belongs to the physical page: [ 23.827026] page:000000009ed4a84c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe341 [ 23.827625] memcg:ffff88800e7bb001 [ 23.827857] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.828209] page_type: 0xffffffff() [ 23.828457] raw: 0100000000000200 ffff8880087a0c80 ffffea000034e740 0000000000000002 [ 23.828957] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7bb001 [ 23.829447] page dumped because: kasan: bad access detected [ 23.829810] [ 23.829929] Memory state around the buggy address: [ 23.830253] ffff88800e341c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 23.830722] ffff88800e341d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 23.831188] >ffff88800e341d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 23.831662] ^ [ 23.832102] ffff88800e341e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 23.832567] ffff88800e341e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.833026] ================================================================== [ 23.833560] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.219540] BUG: Bad rss-counter state mm:00000000fc364e17 type:MM_FILEPAGES val:33 [ 26.220698] BUG: Bad rss-counter state mm:00000000fc364e17 type:MM_ANONPAGES val:22 [ 26.774361] BUG: Bad rss-counter state mm:0000000001a22009 type:MM_FILEPAGES val:33 [ 26.775598] BUG: Bad rss-counter state mm:0000000001a22009 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62229' (ECDSA) to the list of known hosts. 2023/06/21 04:03:08 fuzzer started 2023/06/21 04:03:09 dialing manager at localhost:36067 2023/06/21 04:03:09 checking machine... 2023/06/21 04:03:09 checking revisions... [ 27.403237] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:03:09 testing simple program... [ 27.455287] cgroup: Unknown subsys name 'net' [ 27.494622] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:03:08 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=00007f0c92d57000 CR3=000000000c80a000 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=2038303a33303a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a33303a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff810bd033 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09a01 RSI=ffff88806cf09a68 RDI=ffff88806cf09a68 RBP=ffff88806cf09ac8 RSP=ffff88806cf099a8 R8 =ffffffff86098096 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09a70 R15=ffff88806cf09a70 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fac98a5a900 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=00007fac9901434c CR3=000000000c570000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000