[ 48.777970] BUG: Bad rss-counter state mm:000000006a4b8128 type:MM_FILEPAGES val:33 [ 48.778980] BUG: Bad rss-counter state mm:000000006a4b8128 type:MM_ANONPAGES val:22 [ 48.941065] ================================================================== [ 48.942016] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.942961] Read of size 8 at addr ffff88801bc2dc20 by task sshd/218 [ 48.943744] [ 48.944062] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.944945] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.945906] Call Trace: [ 48.946224] [ 48.946505] dump_stack_lvl+0x91/0xf0 [ 48.946996] print_report+0xcc/0x620 [ 48.947474] ? __virt_addr_valid+0x102/0x340 [ 48.948024] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.948648] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.949261] kasan_report+0xbe/0xf0 [ 48.949737] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.950358] vma_interval_tree_remove+0xc75/0xec0 [ 48.950957] vma_prepare+0xc54/0x11a0 [ 48.951431] __split_vma+0x5af/0x950 [ 48.951903] ? __pfx___split_vma+0x10/0x10 [ 48.952424] ? find_held_lock+0x2c/0x110 [ 48.952964] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.953536] ? lock_is_held_type+0x9f/0x120 [ 48.954070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.954675] ? mtree_range_walk+0x632/0x900 [ 48.955225] ? mas_walk+0x5c7/0x7c0 [ 48.955704] do_vmi_munmap+0x1f1/0x2b0 [ 48.956195] mmap_region+0x1f9/0x2660 [ 48.956683] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.957203] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.957919] ? __pfx_lock_acquire+0x10/0x10 [ 48.958458] ? __pfx_mmap_region+0x10/0x10 [ 48.958987] ? security_mmap_addr+0x7d/0xa0 [ 48.959529] ? get_unmapped_area+0x1f5/0x3f0 [ 48.960095] do_mmap+0x854/0xf00 [ 48.960533] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.961049] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.961609] ksys_mmap_pgoff+0x3af/0x500 [ 48.962115] do_syscall_64+0x3f/0x90 [ 48.962594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.963232] RIP: 0033:0x7fadefb83d82 [ 48.963683] 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 [ 48.965794] RSP: 002b:00007fff393d34d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.966697] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fadefb83d82 [ 48.967535] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fadeefbd000 [ 48.968377] RBP: 00007fadeefbd000 R08: 0000000000000009 R09: 0000000000001000 [ 48.969222] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d97f369ec0 [ 48.970068] R13: 00007fff393d34f0 R14: 00007fff393d3520 R15: 00007fff393d3880 [ 48.970920] [ 48.971215] [ 48.971427] Allocated by task 210: [ 48.971865] kasan_save_stack+0x22/0x50 [ 48.972365] kasan_set_track+0x25/0x30 [ 48.972871] __kasan_slab_alloc+0x59/0x70 [ 48.973395] kmem_cache_alloc+0x16b/0x370 [ 48.973909] vm_area_dup+0x20/0x160 [ 48.974369] __split_vma+0x170/0x950 [ 48.974842] split_vma+0xc6/0x110 [ 48.975278] mprotect_fixup+0x8d2/0xb30 [ 48.975775] do_mprotect_pkey+0x87e/0xd40 [ 48.976291] __x64_sys_mprotect+0x78/0xc0 [ 48.976831] do_syscall_64+0x3f/0x90 [ 48.977307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.977944] [ 48.978157] Freed by task 210: [ 48.978555] kasan_save_stack+0x22/0x50 [ 48.979077] kasan_set_track+0x25/0x30 [ 48.979575] kasan_save_free_info+0x2b/0x50 [ 48.980109] __kasan_slab_free+0x10a/0x190 [ 48.980656] kmem_cache_free+0x10d/0x4d0 [ 48.981161] rcu_core+0x8c8/0x2860 [ 48.981601] __do_softirq+0x1b7/0x7d4 [ 48.982083] [ 48.982300] Last potentially related work creation: [ 48.982883] kasan_save_stack+0x22/0x50 [ 48.983379] __kasan_record_aux_stack+0x8e/0xa0 [ 48.983958] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.984594] remove_vma+0x139/0x170 [ 48.985047] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.985603] do_vmi_munmap+0x1f1/0x2b0 [ 48.986083] __vm_munmap+0x138/0x3a0 [ 48.986552] __x64_sys_munmap+0x59/0x80 [ 48.987057] do_syscall_64+0x3f/0x90 [ 48.987523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.988156] [ 48.988368] The buggy address belongs to the object at ffff88801bc2dbc8 [ 48.988368] which belongs to the cache vm_area_struct of size 168 [ 48.989829] The buggy address is located 88 bytes inside of [ 48.989829] freed 168-byte region [ffff88801bc2dbc8, ffff88801bc2dc70) [ 48.991209] [ 48.991422] The buggy address belongs to the physical page: [ 48.992070] page:00000000cf6270c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc2d [ 48.993166] memcg:ffff88801a3d8901 [ 48.993590] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.994229] page_type: 0xffffffff() [ 48.994683] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 48.995597] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3d8901 [ 48.996498] page dumped because: kasan: bad access detected [ 48.997165] [ 48.997380] Memory state around the buggy address: [ 48.997963] ffff88801bc2db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.998811] ffff88801bc2db80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 48.999661] >ffff88801bc2dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 49.000512] ^ [ 49.001058] ffff88801bc2dc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 49.001901] ffff88801bc2dd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 49.002755] ================================================================== [ 49.003798] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 50.855457] BUG: Bad rss-counter state mm:00000000f13e9421 type:MM_FILEPAGES val:33 [ 50.857059] BUG: Bad rss-counter state mm:00000000f13e9421 type:MM_ANONPAGES val:22 [ 51.365775] BUG: Bad rss-counter state mm:00000000b28b2b4b type:MM_FILEPAGES val:33 [ 51.367004] BUG: Bad rss-counter state mm:00000000b28b2b4b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1556' (ECDSA) to the list of known hosts. 2023/06/19 23:01:23 fuzzer started 2023/06/19 23:01:24 dialing manager at localhost:44161 2023/06/19 23:01:24 checking machine... 2023/06/19 23:01:24 checking revisions... [ 52.114468] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:01:24 testing simple program... [ 52.166339] cgroup: Unknown subsys name 'net' [ 52.221371] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:01:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81806192 RDI=ffff88806ce3de20 RBP=1ffff110028e1ea7 RSP=ffff88801470f528 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000d000c R12=ffff88806ce3de20 R13=ffffffff81806192 R14=0000000000000000 R15=0000000000000004 RIP=ffffffff812d8649 RFL=00000012 [----A--] 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 00007fb41180f900 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=000055b89d530748 CR3=000000000c74a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=c8d6006e5fa8710300000000000ae988 XMM05=c46b8c606067757e0000000000134c78 XMM06=b72cf927fca5af9c00000000001339b0 XMM07=fb795ef6d657705600000000001241b0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f0a6a00 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffed1001e14d5d RBP=00000000000000e8 RSP=ffff88800cfcfa90 R8 =0000000000042a50 R9 =0000000000000000 R10=ffffed1001e14d40 R11=ffff88800f0a6a00 R12=ffff88800f0a6a00 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff8180ffa3 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 00007fcd4ad34900 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=00007fcd4b2eb618 CR3=0000000009d9a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000