syzkaller login: [ 36.013167] BUG: Bad rss-counter state mm:000000007e3df220 type:MM_FILEPAGES val:33 [ 36.014267] BUG: Bad rss-counter state mm:000000007e3df220 type:MM_ANONPAGES val:22 [ 36.055023] ================================================================== [ 36.056048] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.057009] Read of size 8 at addr ffff888016858b38 by task sshd/219 [ 36.057961] [ 36.058179] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.059042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.060034] Call Trace: [ 36.060337] <TASK> [ 36.060622] dump_stack_lvl+0x91/0xf0 [ 36.061115] print_report+0xcc/0x620 [ 36.061592] ? __virt_addr_valid+0x102/0x340 [ 36.062158] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.062779] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.063397] kasan_report+0xbe/0xf0 [ 36.063872] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.064490] vma_interval_tree_remove+0xc75/0xec0 [ 36.065090] vma_prepare+0xc54/0x11a0 [ 36.065562] __split_vma+0x5af/0x950 [ 36.066041] ? __pfx___split_vma+0x10/0x10 [ 36.066584] ? find_held_lock+0x2c/0x110 [ 36.067103] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.067671] ? lock_is_held_type+0x9f/0x120 [ 36.068204] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.068813] ? mtree_range_walk+0x632/0x900 [ 36.069365] ? mas_walk+0x5c7/0x7c0 [ 36.069862] do_vmi_munmap+0x1f1/0x2b0 [ 36.070517] mmap_region+0x1f9/0x2660 [ 36.071061] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.071570] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.072290] ? __pfx_lock_acquire+0x10/0x10 [ 36.072832] ? __pfx_mmap_region+0x10/0x10 [ 36.073378] ? security_mmap_addr+0x7d/0xa0 [ 36.073922] ? get_unmapped_area+0x1f5/0x3f0 [ 36.074474] do_mmap+0x854/0xf00 [ 36.074917] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.075434] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.075997] ksys_mmap_pgoff+0x3af/0x500 [ 36.076508] do_syscall_64+0x3f/0x90 [ 36.076989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.077638] RIP: 0033:0x7f2f42a36d82 [ 36.078113] 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 [ 36.080253] RSP: 002b:00007fff1a76f1d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.081173] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f42a36d82 [ 36.082048] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f41e70000 [ 36.082944] RBP: 00007f2f41e70000 R08: 0000000000000009 R09: 0000000000001000 [ 36.083828] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a017b52d90 [ 36.084713] R13: 00007fff1a76f1f0 R14: 00007fff1a76f220 R15: 00007fff1a76f580 [ 36.085614] </TASK> [ 36.085929] [ 36.086157] Allocated by task 212: [ 36.086611] kasan_save_stack+0x22/0x50 [ 36.087146] kasan_set_track+0x25/0x30 [ 36.087658] __kasan_slab_alloc+0x59/0x70 [ 36.088209] kmem_cache_alloc+0x16b/0x370 [ 36.088744] vm_area_dup+0x20/0x160 [ 36.089218] __split_vma+0x170/0x950 [ 36.089703] split_vma+0xc6/0x110 [ 36.090181] mprotect_fixup+0x8d2/0xb30 [ 36.090711] do_mprotect_pkey+0x87e/0xd40 [ 36.091254] __x64_sys_mprotect+0x78/0xc0 [ 36.091802] do_syscall_64+0x3f/0x90 [ 36.092299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.092973] [ 36.093201] Freed by task 212: [ 36.093614] kasan_save_stack+0x22/0x50 [ 36.094151] kasan_set_track+0x25/0x30 [ 36.094671] kasan_save_free_info+0x2b/0x50 [ 36.095217] __kasan_slab_free+0x10a/0x190 [ 36.095771] kmem_cache_free+0x10d/0x4d0 [ 36.096294] rcu_core+0x8c8/0x2860 [ 36.096759] __do_softirq+0x1b7/0x7d4 [ 36.097253] [ 36.097480] Last potentially related work creation: [ 36.098105] kasan_save_stack+0x22/0x50 [ 36.098629] __kasan_record_aux_stack+0x8e/0xa0 [ 36.099227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.099969] remove_vma+0x139/0x170 [ 36.100446] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.101024] do_vmi_munmap+0x1f1/0x2b0 [ 36.101534] __vm_munmap+0x138/0x3a0 [ 36.102030] __x64_sys_munmap+0x59/0x80 [ 36.102547] do_syscall_64+0x3f/0x90 [ 36.103039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.103703] [ 36.103926] The buggy address belongs to the object at ffff888016858ae0 [ 36.103926] which belongs to the cache vm_area_struct of size 168 [ 36.105466] The buggy address is located 88 bytes inside of [ 36.105466] freed 168-byte region [ffff888016858ae0, ffff888016858b88) [ 36.106941] [ 36.107162] The buggy address belongs to the physical page: [ 36.107848] page:00000000bc2eb4f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16858 [ 36.108995] memcg:ffff888019775201 [ 36.109439] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.110139] page_type: 0xffffffff() [ 36.110611] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.111567] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019775201 [ 36.112511] page dumped because: kasan: bad access detected [ 36.113207] [ 36.113430] Memory state around the buggy address: [ 36.114059] ffff888016858a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.114955] ffff888016858a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 36.115851] >ffff888016858b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.116737] ^ [ 36.117374] ffff888016858b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.118283] ffff888016858c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.119175] ================================================================== [ 36.120148] Disabling lock debugging due to kernel taint [ 38.971540] BUG: Bad rss-counter state mm:0000000029bddaca type:MM_FILEPAGES val:33 [ 38.972703] BUG: Bad rss-counter state mm:0000000029bddaca type:MM_ANONPAGES val:22 [ 39.392468] BUG: Bad rss-counter state mm:000000000fd0c940 type:MM_FILEPAGES val:33 [ 39.393748] BUG: Bad rss-counter state mm:000000000fd0c940 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42373' (ECDSA) to the list of known hosts. 2023/06/20 03:27:13 fuzzer started 2023/06/20 03:27:13 dialing manager at localhost:44161 2023/06/20 03:27:13 checking machine... 2023/06/20 03:27:13 checking revisions... [ 40.117498] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:27:13 testing simple program... [ 40.172307] cgroup: Unknown subsys name 'net' [ 40.218955] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:27:08 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff81534376 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88801caafb98 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffffffff81806df1 R12=ffff8880087b6500 R13=ffff88806ce40d70 R14=0000000000000246 R15=ffff88806ce40d50 RIP=ffffffff8180f006 RFL=00000086 [--S--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 00007f4b2f9e9900 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=00007f4b2ffa10b0 CR3=000000001c9f2000 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=2032313a37323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a37323a3330203032 XMM08=3d656e696c646d632022656369767265 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=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=00007f799fa53b90 CR3=000000000910e000 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=1f3e80c750956c92794c5cad71f9ee9d XMM02=2c67c8bc2e329bc3000000000011de00 XMM03=fb795ef6d65770560000000000124af0 XMM04=d179277f77ca8cc700000000000ae988 XMM05=dfcdbad4f1609c3700000000001345e8 XMM06=28a727732291a2940000000000133450 XMM07=e042d86d42eb936e0000000000124d70 XMM08=1b718988fb29a1cc000000000011de60 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000