[ 63.820001] BUG: Bad rss-counter state mm:000000006ae9f7e6 type:MM_FILEPAGES val:33 [ 63.821066] BUG: Bad rss-counter state mm:000000006ae9f7e6 type:MM_ANONPAGES val:22 [ 63.979073] ================================================================== [ 63.979970] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.980911] Read of size 8 at addr ffff88800d947140 by task sshd/220 [ 63.981674] [ 63.981894] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 63.983046] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.984031] Call Trace: [ 63.984345] [ 63.984623] dump_stack_lvl+0x91/0xf0 [ 63.985140] print_report+0xcc/0x620 [ 63.985638] ? __virt_addr_valid+0x102/0x340 [ 63.986180] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.986785] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.987393] kasan_report+0xbe/0xf0 [ 63.987860] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.988481] vma_interval_tree_remove+0xc75/0xec0 [ 63.989086] vma_prepare+0xc54/0x11a0 [ 63.989560] __split_vma+0x5af/0x950 [ 63.990032] ? __pfx___split_vma+0x10/0x10 [ 63.990559] ? find_held_lock+0x2c/0x110 [ 63.991069] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.991626] ? lock_is_held_type+0x9f/0x120 [ 63.992156] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.992765] ? mtree_range_walk+0x632/0x900 [ 63.993304] ? mas_walk+0x5c7/0x7c0 [ 63.993775] do_vmi_munmap+0x1f1/0x2b0 [ 63.994262] mmap_region+0x1f9/0x2660 [ 63.994739] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.995248] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.995959] ? __pfx_lock_acquire+0x10/0x10 [ 63.996487] ? __pfx_mmap_region+0x10/0x10 [ 63.997028] ? security_mmap_addr+0x7d/0xa0 [ 63.997552] ? get_unmapped_area+0x1f5/0x3f0 [ 63.998096] do_mmap+0x854/0xf00 [ 63.998535] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.999026] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.999590] ksys_mmap_pgoff+0x3af/0x500 [ 64.000090] do_syscall_64+0x3f/0x90 [ 64.000566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.001203] RIP: 0033:0x7f3c4dc8ad82 [ 64.001658] 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 [ 64.003748] RSP: 002b:00007ffc710f5cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.004643] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c4dc8ad82 [ 64.005487] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c4d0c4000 [ 64.006339] RBP: 00007f3c4d0c4000 R08: 0000000000000009 R09: 0000000000001000 [ 64.007182] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a375236b20 [ 64.008022] R13: 00007ffc710f5ce0 R14: 00007ffc710f5d10 R15: 00007ffc710f6070 [ 64.008901] [ 64.009191] [ 64.009409] Allocated by task 213: [ 64.009831] kasan_save_stack+0x22/0x50 [ 64.010333] kasan_set_track+0x25/0x30 [ 64.010822] __kasan_slab_alloc+0x59/0x70 [ 64.011342] kmem_cache_alloc+0x16b/0x370 [ 64.011852] vm_area_dup+0x20/0x160 [ 64.012301] __split_vma+0x170/0x950 [ 64.012775] split_vma+0xc6/0x110 [ 64.013226] mprotect_fixup+0x8d2/0xb30 [ 64.013724] do_mprotect_pkey+0x87e/0xd40 [ 64.014239] __x64_sys_mprotect+0x78/0xc0 [ 64.014756] do_syscall_64+0x3f/0x90 [ 64.015222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.015855] [ 64.016068] Freed by task 19: [ 64.016449] kasan_save_stack+0x22/0x50 [ 64.016964] kasan_set_track+0x25/0x30 [ 64.017450] kasan_save_free_info+0x2b/0x50 [ 64.017976] __kasan_slab_free+0x10a/0x190 [ 64.018504] kmem_cache_free+0x10d/0x4d0 [ 64.019009] rcu_core+0x8c8/0x2860 [ 64.019457] __do_softirq+0x1b7/0x7d4 [ 64.019929] [ 64.020141] Last potentially related work creation: [ 64.020734] kasan_save_stack+0x22/0x50 [ 64.021236] __kasan_record_aux_stack+0x8e/0xa0 [ 64.021803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.022440] remove_vma+0x139/0x170 [ 64.022882] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.023447] do_vmi_munmap+0x1f1/0x2b0 [ 64.023942] __vm_munmap+0x138/0x3a0 [ 64.024415] __x64_sys_munmap+0x59/0x80 [ 64.024944] do_syscall_64+0x3f/0x90 [ 64.025421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.026084] [ 64.026307] The buggy address belongs to the object at ffff88800d9470e8 [ 64.026307] which belongs to the cache vm_area_struct of size 168 [ 64.027813] The buggy address is located 88 bytes inside of [ 64.027813] freed 168-byte region [ffff88800d9470e8, ffff88800d947190) [ 64.029275] [ 64.029496] The buggy address belongs to the physical page: [ 64.030170] page:00000000220a90bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd947 [ 64.031285] memcg:ffff88800e299101 [ 64.031716] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 64.032437] page_type: 0xffffffff() [ 64.032906] raw: 0100000000000200 ffff88800879fc80 ffffea0000359400 dead000000000003 [ 64.033858] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e299101 [ 64.034778] page dumped because: kasan: bad access detected [ 64.035459] [ 64.035680] Memory state around the buggy address: [ 64.036268] ffff88800d947000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.037157] ffff88800d947080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 64.038053] >ffff88800d947100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.038935] ^ [ 64.039604] ffff88800d947180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 64.040491] ffff88800d947200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 64.041384] ================================================================== [ 64.042653] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 66.402003] BUG: Bad rss-counter state mm:0000000090d20e5c type:MM_FILEPAGES val:33 [ 66.402976] BUG: Bad rss-counter state mm:0000000090d20e5c type:MM_ANONPAGES val:22 [ 66.884529] BUG: Bad rss-counter state mm:00000000c17c230a type:MM_FILEPAGES val:33 [ 66.886261] BUG: Bad rss-counter state mm:00000000c17c230a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30756' (ECDSA) to the list of known hosts. 2023/06/19 22:00:05 fuzzer started 2023/06/19 22:00:05 dialing manager at localhost:44161 2023/06/19 22:00:05 checking machine... 2023/06/19 22:00:05 checking revisions... [ 67.607048] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:00:05 testing simple program... [ 67.662438] cgroup: Unknown subsys name 'net' [ 67.725075] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:59:32 Registers: info registers vcpu 0 RAX=000000000000000c RBX=1ffff11001b2ee9d RCX=0000000000000000 RDX=0000000000000800 RSI=000000000000000c RDI=ffff88800d977508 RBP=0000000000000040 RSP=ffff88800d9774e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88801b848d80 R13=0000000000000000 R14=ffff88801cb2d048 R15=ffff88801cb2d000 RIP=ffffffff82271264 RFL=00000287 [--S--PC] 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 00007fa621c6c900 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=00007fa621098330 CR3=000000000d63e000 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=2035303a30303a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a30303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888019d9e480 RCX=ffff888019d9e480 RDX=00000000802a001e RSI=ffff888019d9e480 RDI=ffff88800879f3c0 RBP=ffff888016eafa28 RSP=ffff888016eaf990 R8 =00000000802a001d R9 =0000000000000000 R10=ffffea0000676780 R11=00000000802a001e R12=ffffea0000676780 R13=ffff888019d9e420 R14=00000000802a001d R15=ffff88800879f3c0 RIP=ffffffff818094f2 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 00007ff954585900 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=00007ffcd5e11000 CR3=000000000e81a000 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