[ 32.564517] BUG: Bad rss-counter state mm:0000000074169c52 type:MM_FILEPAGES val:33 [ 32.565745] BUG: Bad rss-counter state mm:0000000074169c52 type:MM_ANONPAGES val:22 [ 32.604720] ================================================================== [ 32.606048] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.607191] Read of size 8 at addr ffff888015a4a4e0 by task sshd/219 [ 32.608292] [ 32.608601] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.609850] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.611113] Call Trace: [ 32.611519] [ 32.611879] dump_stack_lvl+0x91/0xf0 [ 32.612440] print_report+0xcc/0x620 [ 32.613043] ? __virt_addr_valid+0x102/0x340 [ 32.613786] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.614524] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.615195] kasan_report+0xbe/0xf0 [ 32.615855] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.616533] vma_interval_tree_remove+0xc75/0xec0 [ 32.617199] vma_prepare+0xc54/0x11a0 [ 32.617725] __split_vma+0x5af/0x950 [ 32.618239] ? __pfx___split_vma+0x10/0x10 [ 32.618938] ? find_held_lock+0x2c/0x110 [ 32.619520] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.620137] ? lock_is_held_type+0x9f/0x120 [ 32.620932] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.621664] ? mtree_range_walk+0x632/0x900 [ 32.622342] ? mas_walk+0x5c7/0x7c0 [ 32.622900] do_vmi_munmap+0x1f1/0x2b0 [ 32.623502] mmap_region+0x1f9/0x2660 [ 32.624167] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.624727] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.625516] ? __pfx_lock_acquire+0x10/0x10 [ 32.626098] ? __pfx_mmap_region+0x10/0x10 [ 32.626677] ? security_mmap_addr+0x7d/0xa0 [ 32.627259] ? get_unmapped_area+0x1f5/0x3f0 [ 32.627876] do_mmap+0x854/0xf00 [ 32.628362] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.628933] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.629560] ksys_mmap_pgoff+0x3af/0x500 [ 32.630122] do_syscall_64+0x3f/0x90 [ 32.630649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.631363] RIP: 0033:0x7f6b97f7ad82 [ 32.631874] 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 [ 32.634203] RSP: 002b:00007ffe214412a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.635206] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b97f7ad82 [ 32.636141] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b973b4000 [ 32.637076] RBP: 00007f6b973b4000 R08: 0000000000000009 R09: 0000000000001000 [ 32.638005] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e1875dbec0 [ 32.638928] R13: 00007ffe214412c0 R14: 00007ffe214412f0 R15: 00007ffe21441650 [ 32.639879] [ 32.640205] [ 32.640447] Allocated by task 212: [ 32.640942] kasan_save_stack+0x22/0x50 [ 32.641507] kasan_set_track+0x25/0x30 [ 32.642051] __kasan_slab_alloc+0x59/0x70 [ 32.642631] kmem_cache_alloc+0x16b/0x370 [ 32.643201] vm_area_dup+0x20/0x160 [ 32.643707] __split_vma+0x170/0x950 [ 32.644235] split_vma+0xc6/0x110 [ 32.644725] mprotect_fixup+0x8d2/0xb30 [ 32.645297] do_mprotect_pkey+0x87e/0xd40 [ 32.645882] __x64_sys_mprotect+0x78/0xc0 [ 32.646469] do_syscall_64+0x3f/0x90 [ 32.647001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.647715] [ 32.647953] Freed by task 212: [ 32.648381] kasan_save_stack+0x22/0x50 [ 32.648946] kasan_set_track+0x25/0x30 [ 32.649496] kasan_save_free_info+0x2b/0x50 [ 32.650167] __kasan_slab_free+0x10a/0x190 [ 32.650750] kmem_cache_free+0x10d/0x4d0 [ 32.651311] rcu_core+0x8c8/0x2860 [ 32.651802] __do_softirq+0x1b7/0x7d4 [ 32.652328] [ 32.652570] Last potentially related work creation: [ 32.653227] kasan_save_stack+0x22/0x50 [ 32.653788] __kasan_record_aux_stack+0x8e/0xa0 [ 32.654434] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.655147] remove_vma+0x139/0x170 [ 32.655649] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.656267] do_vmi_munmap+0x1f1/0x2b0 [ 32.656830] __vm_munmap+0x138/0x3a0 [ 32.657363] __x64_sys_munmap+0x59/0x80 [ 32.657932] do_syscall_64+0x3f/0x90 [ 32.658475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.659214] [ 32.659458] The buggy address belongs to the object at ffff888015a4a488 [ 32.659458] which belongs to the cache vm_area_struct of size 168 [ 32.661148] The buggy address is located 88 bytes inside of [ 32.661148] freed 168-byte region [ffff888015a4a488, ffff888015a4a530) [ 32.662753] [ 32.663002] The buggy address belongs to the physical page: [ 32.663756] page:000000008adc330a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a4a [ 32.665010] memcg:ffff888017ee6401 [ 32.665505] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.666248] page_type: 0xffffffff() [ 32.666765] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.667827] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017ee6401 [ 32.668889] page dumped because: kasan: bad access detected [ 32.669646] [ 32.669899] Memory state around the buggy address: [ 32.670568] ffff888015a4a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.671552] ffff888015a4a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.672532] >ffff888015a4a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.673507] ^ [ 32.674397] ffff888015a4a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.675402] ffff888015a4a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.676385] ================================================================== [ 32.677510] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.672095] BUG: Bad rss-counter state mm:0000000037a857db type:MM_FILEPAGES val:33 [ 34.672932] BUG: Bad rss-counter state mm:0000000037a857db type:MM_ANONPAGES val:22 [ 35.164837] BUG: Bad rss-counter state mm:0000000079d90e61 type:MM_FILEPAGES val:33 [ 35.166148] BUG: Bad rss-counter state mm:0000000079d90e61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44683' (ECDSA) to the list of known hosts. 2023/06/19 10:51:40 fuzzer started 2023/06/19 10:51:40 dialing manager at localhost:44161 2023/06/19 10:51:40 checking machine... 2023/06/19 10:51:40 checking revisions... [ 35.952153] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:51:40 testing simple program... [ 35.992006] cgroup: Unknown subsys name 'net' [ 36.055393] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:51:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800ffe1f40 RCX=0000000000000000 RDX=ffff88800ffe1f40 RSI=ffffffff81f07e20 RDI=ffff88800dc48e04 RBP=0000000000000001 RSP=ffff88801cc9fc98 R8 =ffff88801cc9fc70 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800ef48c00 R13=ffff88800ebf7180 R14=0000000000000000 R15=ffff888008f92000 RIP=ffffffff81f07eed 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 00007fda20f6e900 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=00007fda21525618 CR3=000000000caf6000 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=2039333a31353a3031203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a31353a3031203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=ffffffff864b1a01 RDX=1ffff1100d9e135e RSI=0000000000000000 RDI=ffffffff812889a5 RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =ffffffff864b1a38 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b53b8 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff8880165c67a0 RIP=ffffffff811303b2 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 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=00007fcba6ed0020 CR3=000000000c606000 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=4f443e3de8c23aa2c946d05cb57ceb66 XMM02=000000000011d158ec2efd57dc4c00df XMM03=0000000000123ec885a0df2931fc28a1 XMM04=eab44f33db99097000000000000ae988 XMM05=e4cb8bb95a7664b600000000001337a0 XMM06=e5af0778cc27a25e0000000000132978 XMM07=e042d86d42eb936e00000000001241a0 XMM08=85a0df2931fc28a1000000000011d1b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000