[ 26.613577] BUG: Bad rss-counter state mm:000000002d245deb type:MM_FILEPAGES val:33 [ 26.614610] BUG: Bad rss-counter state mm:000000002d245deb type:MM_ANONPAGES val:22 [ 26.970495] ================================================================== [ 26.971398] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.972326] Read of size 8 at addr ffff88801a3cd5c8 by task sshd/219 [ 26.973177] [ 26.973391] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.974253] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.975222] Call Trace: [ 26.975540] [ 26.975828] dump_stack_lvl+0x91/0xf0 [ 26.976310] print_report+0xcc/0x620 [ 26.976808] ? __virt_addr_valid+0x102/0x340 [ 26.977362] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.977978] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.978584] kasan_report+0xbe/0xf0 [ 26.979061] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.979675] vma_interval_tree_remove+0xc75/0xec0 [ 26.980290] vma_prepare+0xc54/0x11a0 [ 26.980765] __split_vma+0x5af/0x950 [ 26.981233] ? __pfx___split_vma+0x10/0x10 [ 26.981766] ? find_held_lock+0x2c/0x110 [ 26.982319] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.982882] ? lock_is_held_type+0x9f/0x120 [ 26.983426] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.984027] ? mtree_range_walk+0x632/0x900 [ 26.984574] ? mas_walk+0x5c7/0x7c0 [ 26.985048] do_vmi_munmap+0x1f1/0x2b0 [ 26.985544] mmap_region+0x1f9/0x2660 [ 26.986032] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.986539] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.987256] ? __pfx_lock_acquire+0x10/0x10 [ 26.987780] ? __pfx_mmap_region+0x10/0x10 [ 26.988311] ? security_mmap_addr+0x7d/0xa0 [ 26.988833] ? get_unmapped_area+0x1f5/0x3f0 [ 26.989390] do_mmap+0x854/0xf00 [ 26.989834] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.990330] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.990887] ksys_mmap_pgoff+0x3af/0x500 [ 26.991398] do_syscall_64+0x3f/0x90 [ 26.991873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.992512] RIP: 0033:0x7f7bb7069d82 [ 26.992966] 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 [ 26.995093] RSP: 002b:00007ffd00592228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.996000] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7bb7069d82 [ 26.996841] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7bb64a3000 [ 26.997685] RBP: 00007f7bb64a3000 R08: 0000000000000009 R09: 0000000000001000 [ 26.998536] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dff959eec0 [ 26.999384] R13: 00007ffd00592240 R14: 00007ffd00592270 R15: 00007ffd005925d0 [ 27.000239] [ 27.000527] [ 27.000740] Allocated by task 206: [ 27.001176] kasan_save_stack+0x22/0x50 [ 27.001675] kasan_set_track+0x25/0x30 [ 27.002173] __kasan_slab_alloc+0x59/0x70 [ 27.002692] kmem_cache_alloc+0x16b/0x370 [ 27.003210] vm_area_dup+0x20/0x160 [ 27.003661] __split_vma+0x170/0x950 [ 27.004126] split_vma+0xc6/0x110 [ 27.004568] mprotect_fixup+0x8d2/0xb30 [ 27.005065] do_mprotect_pkey+0x87e/0xd40 [ 27.005581] __x64_sys_mprotect+0x78/0xc0 [ 27.006122] do_syscall_64+0x3f/0x90 [ 27.006593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.007248] [ 27.007461] Freed by task 205: [ 27.007850] kasan_save_stack+0x22/0x50 [ 27.008350] kasan_set_track+0x25/0x30 [ 27.008839] kasan_save_free_info+0x2b/0x50 [ 27.009364] __kasan_slab_free+0x10a/0x190 [ 27.009899] kmem_cache_free+0x10d/0x4d0 [ 27.010412] rcu_core+0x8c8/0x2860 [ 27.010860] __do_softirq+0x1b7/0x7d4 [ 27.011335] [ 27.011556] Last potentially related work creation: [ 27.012140] kasan_save_stack+0x22/0x50 [ 27.012648] __kasan_record_aux_stack+0x8e/0xa0 [ 27.013224] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.013878] remove_vma+0x139/0x170 [ 27.014326] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.014883] do_vmi_munmap+0x1f1/0x2b0 [ 27.015363] __vm_munmap+0x138/0x3a0 [ 27.015832] __x64_sys_munmap+0x59/0x80 [ 27.016328] do_syscall_64+0x3f/0x90 [ 27.016809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.017458] [ 27.017676] The buggy address belongs to the object at ffff88801a3cd570 [ 27.017676] which belongs to the cache vm_area_struct of size 168 [ 27.019143] The buggy address is located 88 bytes inside of [ 27.019143] freed 168-byte region [ffff88801a3cd570, ffff88801a3cd618) [ 27.020551] [ 27.020765] The buggy address belongs to the physical page: [ 27.021422] page:00000000d20f3442 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3cd [ 27.022518] memcg:ffff88801a3ce001 [ 27.022941] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.023582] page_type: 0xffffffff() [ 27.024034] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 27.024948] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3ce001 [ 27.025855] page dumped because: kasan: bad access detected [ 27.026514] [ 27.026734] Memory state around the buggy address: [ 27.027313] ffff88801a3cd480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.028170] ffff88801a3cd500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 27.029024] >ffff88801a3cd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.029887] ^ [ 27.030548] ffff88801a3cd600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 27.031402] ffff88801a3cd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.032256] ================================================================== [ 27.033222] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.166987] BUG: Bad rss-counter state mm:0000000041766c72 type:MM_FILEPAGES val:33 [ 29.167998] BUG: Bad rss-counter state mm:0000000041766c72 type:MM_ANONPAGES val:22 [ 29.621278] BUG: Bad rss-counter state mm:00000000b8b68fb0 type:MM_FILEPAGES val:33 [ 29.622529] BUG: Bad rss-counter state mm:00000000b8b68fb0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17548' (ECDSA) to the list of known hosts. 2023/06/20 00:46:25 fuzzer started 2023/06/20 00:46:25 dialing manager at localhost:44161 2023/06/20 00:46:25 checking machine... 2023/06/20 00:46:25 checking revisions... [ 30.332813] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:46:25 testing simple program... [ 30.381322] cgroup: Unknown subsys name 'net' [ 30.418414] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:46:22 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888015c87e70 RSI=0000000000000053 RDI=ffff88801639a800 RBP=0000000000000053 RSP=ffff888015c87780 R8 =0000000000000006 R9 =ffff88801639a800 R10=ffff888004800000 R11=0000000000000000 R12=ffff88801639a800 R13=ffff888015c87e70 R14=0000000000000053 R15=ffff888015c87e70 RIP=ffffffff814c07eb 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 00007f81dae7f900 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=00007f22d25ee650 CR3=000000000f59e000 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=1d730e7acb5bc497ab42f1af2a08a078 XMM02=000000000011cad8eff9b2d0a8fce9cb XMM03=000000000011cba82c67c8bc2e329bc3 XMM04=ef24b406f6f9727f00000000000ae988 XMM05=18a2e9ff3de9d07000000000001345a0 XMM06=dfcdbad4f1609c370000000000132df8 XMM07=fb795ef6d65770560000000000120df0 XMM08=2c67c8bc2e329bc3000000000011cb48 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=0000559b6bebd000 CR3=0000000016c0a000 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=2035323a36343a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a36343a3030203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000