[ 25.619824] BUG: Bad rss-counter state mm:00000000bb9c1f8a type:MM_FILEPAGES val:33 [ 25.621004] BUG: Bad rss-counter state mm:00000000bb9c1f8a type:MM_ANONPAGES val:22 [ 25.654106] ================================================================== [ 25.655185] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.656307] Read of size 8 at addr ffff88801a2d4228 by task sshd/220 [ 25.657370] [ 25.657638] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.658137] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.658677] Call Trace: [ 25.658852] [ 25.659022] dump_stack_lvl+0x91/0xf0 [ 25.659301] print_report+0xcc/0x620 [ 25.659568] ? __virt_addr_valid+0x102/0x340 [ 25.659867] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.660201] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.660543] kasan_report+0xbe/0xf0 [ 25.660800] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.661143] vma_interval_tree_remove+0xc75/0xec0 [ 25.661472] vma_prepare+0xc54/0x11a0 [ 25.661739] __split_vma+0x5af/0x950 [ 25.662004] ? __pfx___split_vma+0x10/0x10 [ 25.662295] ? find_held_lock+0x2c/0x110 [ 25.662590] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.662899] ? lock_is_held_type+0x9f/0x120 [ 25.663210] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.663547] ? mtree_range_walk+0x632/0x900 [ 25.663866] ? mas_walk+0x5c7/0x7c0 [ 25.664134] do_vmi_munmap+0x1f1/0x2b0 [ 25.664422] mmap_region+0x1f9/0x2660 [ 25.664703] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.665000] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.665416] ? __pfx_lock_acquire+0x10/0x10 [ 25.665733] ? __pfx_mmap_region+0x10/0x10 [ 25.666047] ? security_mmap_addr+0x7d/0xa0 [ 25.666352] ? get_unmapped_area+0x1f5/0x3f0 [ 25.666679] do_mmap+0x854/0xf00 [ 25.666931] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.667229] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.667553] ksys_mmap_pgoff+0x3af/0x500 [ 25.667843] do_syscall_64+0x3f/0x90 [ 25.668121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.668499] RIP: 0033:0x7f9df40c5d82 [ 25.668763] 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 [ 25.670021] RSP: 002b:00007ffd9971be18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.670543] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9df40c5d82 [ 25.671048] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9df34ff000 [ 25.671554] RBP: 00007f9df34ff000 R08: 0000000000000009 R09: 0000000000001000 [ 25.672064] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f643f32ec0 [ 25.672565] R13: 00007ffd9971be30 R14: 00007ffd9971be60 R15: 00007ffd9971c1c0 [ 25.673062] [ 25.673231] [ 25.673355] Allocated by task 209: [ 25.673612] kasan_save_stack+0x22/0x50 [ 25.673901] kasan_set_track+0x25/0x30 [ 25.674194] __kasan_slab_alloc+0x59/0x70 [ 25.674504] kmem_cache_alloc+0x16b/0x370 [ 25.674803] vm_area_dup+0x20/0x160 [ 25.675067] __split_vma+0x170/0x950 [ 25.675402] split_vma+0xc6/0x110 [ 25.675661] mprotect_fixup+0x8d2/0xb30 [ 25.675957] do_mprotect_pkey+0x87e/0xd40 [ 25.676264] __x64_sys_mprotect+0x78/0xc0 [ 25.676571] do_syscall_64+0x3f/0x90 [ 25.676852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.677234] [ 25.677360] Freed by task 204: [ 25.677592] kasan_save_stack+0x22/0x50 [ 25.677883] kasan_set_track+0x25/0x30 [ 25.678168] kasan_save_free_info+0x2b/0x50 [ 25.678480] __kasan_slab_free+0x10a/0x190 [ 25.678786] kmem_cache_free+0x10d/0x4d0 [ 25.679082] rcu_core+0x8c8/0x2860 [ 25.679356] __do_softirq+0x1b7/0x7d4 [ 25.679632] [ 25.679758] Last potentially related work creation: [ 25.680103] kasan_save_stack+0x22/0x50 [ 25.680389] __kasan_record_aux_stack+0x8e/0xa0 [ 25.680728] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.681111] remove_vma+0x139/0x170 [ 25.681375] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.681697] do_vmi_munmap+0x1f1/0x2b0 [ 25.681978] __vm_munmap+0x138/0x3a0 [ 25.682255] __x64_sys_munmap+0x59/0x80 [ 25.682547] do_syscall_64+0x3f/0x90 [ 25.682825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.683203] [ 25.683330] The buggy address belongs to the object at ffff88801a2d41d0 [ 25.683330] which belongs to the cache vm_area_struct of size 168 [ 25.684208] The buggy address is located 88 bytes inside of [ 25.684208] freed 168-byte region [ffff88801a2d41d0, ffff88801a2d4278) [ 25.685048] [ 25.685171] The buggy address belongs to the physical page: [ 25.685567] page:00000000587bb348 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2d4 [ 25.686201] memcg:ffff88801a2afa01 [ 25.686455] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.686839] page_type: 0xffffffff() [ 25.687106] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.687646] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2afa01 [ 25.688197] page dumped because: kasan: bad access detected [ 25.688590] [ 25.688719] Memory state around the buggy address: [ 25.689063] ffff88801a2d4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.689576] ffff88801a2d4180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 25.690088] >ffff88801a2d4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 25.690595] ^ [ 25.690926] ffff88801a2d4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 25.691443] ffff88801a2d4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 25.691949] ================================================================== [ 25.692569] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.672143] BUG: Bad rss-counter state mm:00000000fda2e047 type:MM_FILEPAGES val:33 [ 27.673455] BUG: Bad rss-counter state mm:00000000fda2e047 type:MM_ANONPAGES val:22 [ 28.077795] BUG: Bad rss-counter state mm:0000000010eb7bbb type:MM_FILEPAGES val:33 [ 28.078971] BUG: Bad rss-counter state mm:0000000010eb7bbb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57231' (ECDSA) to the list of known hosts. 2023/06/19 19:15:31 fuzzer started 2023/06/19 19:15:32 dialing manager at localhost:44161 2023/06/19 19:15:32 checking machine... 2023/06/19 19:15:32 checking revisions... [ 28.777173] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:15:32 testing simple program... [ 28.828995] cgroup: Unknown subsys name 'net' [ 28.875707] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:15:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110011aff36 RSI=ffffffff84531da7 RDI=ffff888008d7f958 RBP=ffff888008d7f9b0 RSP=ffff888008d7f8e8 R8 =0000000000000001 R9 =ffff888008d7f998 R10=0000000000038001 R11=000000000000fdc6 R12=ffff888008d7fa20 R13=0000000000000000 R14=ffff888008d70000 R15=ffff888008d7f958 RIP=ffffffff8113062c 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 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=00007ff052d8f650 CR3=00000000090c6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=ffff888008c58400 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=00007f777a49a380 CR3=000000000c506000 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=35313a3931203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303638 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000