[ 30.884313] BUG: Bad rss-counter state mm:00000000dd4cdd65 type:MM_FILEPAGES val:33 [ 30.885595] BUG: Bad rss-counter state mm:00000000dd4cdd65 type:MM_ANONPAGES val:22 [ 30.922580] ================================================================== [ 30.923493] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.924446] Read of size 8 at addr ffff88800de2c5c8 by task sshd/221 [ 30.925295] [ 30.925516] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.926389] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.927399] Call Trace: [ 30.927723] [ 30.928009] dump_stack_lvl+0x91/0xf0 [ 30.928500] print_report+0xcc/0x620 [ 30.928979] ? __virt_addr_valid+0x102/0x340 [ 30.929529] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.930141] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.930767] kasan_report+0xbe/0xf0 [ 30.931240] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.931861] vma_interval_tree_remove+0xc75/0xec0 [ 30.932465] vma_prepare+0xc54/0x11a0 [ 30.932948] __split_vma+0x5af/0x950 [ 30.933420] ? __pfx___split_vma+0x10/0x10 [ 30.933950] ? find_held_lock+0x2c/0x110 [ 30.934473] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.935069] ? lock_is_held_type+0x9f/0x120 [ 30.935623] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.936238] ? mtree_range_walk+0x632/0x900 [ 30.936807] ? mas_walk+0x5c7/0x7c0 [ 30.937287] do_vmi_munmap+0x1f1/0x2b0 [ 30.937809] mmap_region+0x1f9/0x2660 [ 30.938314] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.938841] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.939550] ? __pfx_lock_acquire+0x10/0x10 [ 30.940083] ? __pfx_mmap_region+0x10/0x10 [ 30.940617] ? security_mmap_addr+0x7d/0xa0 [ 30.941152] ? get_unmapped_area+0x1f5/0x3f0 [ 30.941715] do_mmap+0x854/0xf00 [ 30.942160] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.942674] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.943244] ksys_mmap_pgoff+0x3af/0x500 [ 30.943755] do_syscall_64+0x3f/0x90 [ 30.944246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.944905] RIP: 0033:0x7fdb71f8fd82 [ 30.945365] 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 [ 30.947537] RSP: 002b:00007ffe069cb508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.948449] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb71f8fd82 [ 30.949304] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb713c9000 [ 30.950166] RBP: 00007fdb713c9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.951038] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604ed1c4ec0 [ 30.951894] R13: 00007ffe069cb520 R14: 00007ffe069cb550 R15: 00007ffe069cb8b0 [ 30.952772] [ 30.953070] [ 30.953282] Allocated by task 214: [ 30.953714] kasan_save_stack+0x22/0x50 [ 30.954232] kasan_set_track+0x25/0x30 [ 30.954744] __kasan_slab_alloc+0x59/0x70 [ 30.955281] kmem_cache_alloc+0x16b/0x370 [ 30.955793] vm_area_dup+0x20/0x160 [ 30.956252] __split_vma+0x170/0x950 [ 30.956720] split_vma+0xc6/0x110 [ 30.957163] mprotect_fixup+0x8d2/0xb30 [ 30.957665] do_mprotect_pkey+0x87e/0xd40 [ 30.958191] __x64_sys_mprotect+0x78/0xc0 [ 30.958719] do_syscall_64+0x3f/0x90 [ 30.959198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.959853] [ 30.960069] Freed by task 214: [ 30.960465] kasan_save_stack+0x22/0x50 [ 30.960965] kasan_set_track+0x25/0x30 [ 30.961461] kasan_save_free_info+0x2b/0x50 [ 30.961997] __kasan_slab_free+0x10a/0x190 [ 30.962533] kmem_cache_free+0x10d/0x4d0 [ 30.963048] rcu_core+0x8c8/0x2860 [ 30.963505] __do_softirq+0x1b7/0x7d4 [ 30.963992] [ 30.964213] Last potentially related work creation: [ 30.964798] kasan_save_stack+0x22/0x50 [ 30.965303] __kasan_record_aux_stack+0x8e/0xa0 [ 30.965887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.966543] remove_vma+0x139/0x170 [ 30.967003] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.967574] do_vmi_munmap+0x1f1/0x2b0 [ 30.968071] __vm_munmap+0x138/0x3a0 [ 30.968537] __x64_sys_munmap+0x59/0x80 [ 30.969037] do_syscall_64+0x3f/0x90 [ 30.969512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.970158] [ 30.970377] The buggy address belongs to the object at ffff88800de2c570 [ 30.970377] which belongs to the cache vm_area_struct of size 168 [ 30.971867] The buggy address is located 88 bytes inside of [ 30.971867] freed 168-byte region [ffff88800de2c570, ffff88800de2c618) [ 30.973282] [ 30.973502] The buggy address belongs to the physical page: [ 30.974152] page:0000000003dc9125 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde2c [ 30.975236] memcg:ffff88800e196501 [ 30.975665] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.976311] page_type: 0xffffffff() [ 30.976760] raw: 0100000000000200 ffff8880087a0c80 ffffea000038bd80 000000000000000c [ 30.977676] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e196501 [ 30.978608] page dumped because: kasan: bad access detected [ 30.979279] [ 30.979498] Memory state around the buggy address: [ 30.980089] ffff88800de2c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.980954] ffff88800de2c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.981825] >ffff88800de2c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.982686] ^ [ 30.983364] ffff88800de2c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.984219] ffff88800de2c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.985075] ================================================================== [ 30.986174] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.940456] BUG: Bad rss-counter state mm:000000007706d8af type:MM_FILEPAGES val:33 [ 32.941867] BUG: Bad rss-counter state mm:000000007706d8af type:MM_ANONPAGES val:22 [ 33.513932] BUG: Bad rss-counter state mm:00000000a5ada025 type:MM_FILEPAGES val:33 [ 33.515079] BUG: Bad rss-counter state mm:00000000a5ada025 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34187' (ECDSA) to the list of known hosts. 2023/06/21 04:14:46 fuzzer started 2023/06/21 04:14:47 dialing manager at localhost:36067 2023/06/21 04:14:47 checking machine... 2023/06/21 04:14:47 checking revisions... [ 34.128091] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:14:47 testing simple program... [ 34.177769] cgroup: Unknown subsys name 'net' [ 34.214972] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:14:46 Registers: info registers vcpu 0 RAX=1ffffffff0a59571 RBX=ffffffff852cab70 RCX=0000000000000000 RDX=ffff8880165d8000 RSI=ffffffff81eeabe3 RDI=ffffffff852cab88 RBP=dffffc0000000000 RSP=ffff88800ec878b0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=63206e6f69737365 R12=ffff88800ec87e60 R13=ffff88800ec87918 R14=ffff88800ec87928 R15=0000000000000001 RIP=ffffffff81eeabf2 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 00007f8592849700 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=00007f293337f618 CR3=000000000cc0e000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732036343a3431 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363232 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fbd44b95ba0 CR3=000000000c770000 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=78ef9c018df3bb8ac04953913c0f8720 XMM02=2c67c8bc2e329bc3000000000011a7f8 XMM03=fb795ef6d65770560000000000121970 XMM04=7e81f0455ab50fa600000000000ae988 XMM05=e4cb8bb95a7664b60000000000131518 XMM06=553382149e62323b00000000001306f0 XMM07=e042d86d42eb936e0000000000121bf0 XMM08=7f694727203ecc74000000000011a858 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000