syzkaller login: [ 70.869389] BUG: Bad rss-counter state mm:00000000f1452cec type:MM_FILEPAGES val:33 [ 70.870614] BUG: Bad rss-counter state mm:00000000f1452cec type:MM_ANONPAGES val:22 [ 70.991668] ================================================================== [ 70.992586] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.993524] Read of size 8 at addr ffff88800e7cd140 by task sshd/220 [ 70.994451] [ 70.994672] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 70.995714] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.996732] Call Trace: [ 70.997050] [ 70.997336] dump_stack_lvl+0x91/0xf0 [ 70.997825] print_report+0xcc/0x620 [ 70.998314] ? __virt_addr_valid+0x102/0x340 [ 70.998880] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.999501] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.000124] kasan_report+0xbe/0xf0 [ 71.000601] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.001225] vma_interval_tree_remove+0xc75/0xec0 [ 71.001832] vma_prepare+0xc54/0x11a0 [ 71.002313] __split_vma+0x5af/0x950 [ 71.002795] ? __pfx___split_vma+0x10/0x10 [ 71.003318] ? find_held_lock+0x2c/0x110 [ 71.003838] do_vmi_align_munmap+0x2ba/0x11f0 [ 71.004412] ? lock_is_held_type+0x9f/0x120 [ 71.004949] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 71.005560] ? mtree_range_walk+0x632/0x900 [ 71.006105] ? mas_walk+0x5c7/0x7c0 [ 71.006603] do_vmi_munmap+0x1f1/0x2b0 [ 71.007094] mmap_region+0x1f9/0x2660 [ 71.007585] ? vm_mmap_pgoff+0x15c/0x3a0 [ 71.008100] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 71.008805] ? __pfx_lock_acquire+0x10/0x10 [ 71.009341] ? __pfx_mmap_region+0x10/0x10 [ 71.009875] ? security_mmap_addr+0x7d/0xa0 [ 71.010421] ? get_unmapped_area+0x1f5/0x3f0 [ 71.010970] do_mmap+0x854/0xf00 [ 71.011410] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.011904] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.012484] ksys_mmap_pgoff+0x3af/0x500 [ 71.012985] do_syscall_64+0x3f/0x90 [ 71.013472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.014109] RIP: 0033:0x7f6355b92d82 [ 71.014586] 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 [ 71.016714] RSP: 002b:00007fffaf6629a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 71.017634] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6355b92d82 [ 71.018491] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6354fcc000 [ 71.019350] RBP: 00007f6354fcc000 R08: 0000000000000009 R09: 0000000000001000 [ 71.020199] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bcd892bec0 [ 71.021062] R13: 00007fffaf6629c0 R14: 00007fffaf6629f0 R15: 00007fffaf662d50 [ 71.021927] [ 71.022217] [ 71.022439] Allocated by task 213: [ 71.022873] kasan_save_stack+0x22/0x50 [ 71.023394] kasan_set_track+0x25/0x30 [ 71.023890] __kasan_slab_alloc+0x59/0x70 [ 71.024412] kmem_cache_alloc+0x16b/0x370 [ 71.024927] vm_area_dup+0x20/0x160 [ 71.025391] __split_vma+0x170/0x950 [ 71.025857] split_vma+0xc6/0x110 [ 71.026298] mprotect_fixup+0x8d2/0xb30 [ 71.026823] do_mprotect_pkey+0x87e/0xd40 [ 71.027350] __x64_sys_mprotect+0x78/0xc0 [ 71.027872] do_syscall_64+0x3f/0x90 [ 71.028343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.028987] [ 71.029203] Freed by task 213: [ 71.029600] kasan_save_stack+0x22/0x50 [ 71.030105] kasan_set_track+0x25/0x30 [ 71.030607] kasan_save_free_info+0x2b/0x50 [ 71.031140] __kasan_slab_free+0x10a/0x190 [ 71.031673] kmem_cache_free+0x10d/0x4d0 [ 71.032180] rcu_core+0x8c8/0x2860 [ 71.032635] __do_softirq+0x1b7/0x7d4 [ 71.033110] [ 71.033328] Last potentially related work creation: [ 71.033920] kasan_save_stack+0x22/0x50 [ 71.034425] __kasan_record_aux_stack+0x8e/0xa0 [ 71.035067] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.035718] remove_vma+0x139/0x170 [ 71.036170] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.036725] do_vmi_munmap+0x1f1/0x2b0 [ 71.037209] __vm_munmap+0x138/0x3a0 [ 71.037678] __x64_sys_munmap+0x59/0x80 [ 71.038170] do_syscall_64+0x3f/0x90 [ 71.038654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.039299] [ 71.039518] Second to last potentially related work creation: [ 71.040205] kasan_save_stack+0x22/0x50 [ 71.040719] __kasan_record_aux_stack+0x8e/0xa0 [ 71.041292] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.041929] remove_vma+0x139/0x170 [ 71.042397] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.042955] do_vmi_munmap+0x1f1/0x2b0 [ 71.043447] mmap_region+0x1f9/0x2660 [ 71.043923] do_mmap+0x854/0xf00 [ 71.044356] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.044843] ksys_mmap_pgoff+0x3af/0x500 [ 71.045347] do_syscall_64+0x3f/0x90 [ 71.045819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.046474] [ 71.046688] The buggy address belongs to the object at ffff88800e7cd0e8 [ 71.046688] which belongs to the cache vm_area_struct of size 168 [ 71.048156] The buggy address is located 88 bytes inside of [ 71.048156] freed 168-byte region [ffff88800e7cd0e8, ffff88800e7cd190) [ 71.049569] [ 71.049785] The buggy address belongs to the physical page: [ 71.050452] page:00000000f5f3d6ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7cd [ 71.051544] memcg:ffff88800e707201 [ 71.051978] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 71.052683] page_type: 0xffffffff() [ 71.053135] raw: 0100000000000200 ffff88800879fc80 ffffea000039f980 dead00000000000b [ 71.054063] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e707201 [ 71.054987] page dumped because: kasan: bad access detected [ 71.055647] [ 71.055862] Memory state around the buggy address: [ 71.056438] ffff88800e7cd000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.057291] ffff88800e7cd080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 71.058156] >ffff88800e7cd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.059017] ^ [ 71.059665] ffff88800e7cd180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 71.060518] ffff88800e7cd200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 71.061369] ================================================================== [ 71.062370] Disabling lock debugging due to kernel taint [ 73.322001] BUG: Bad rss-counter state mm:00000000b10c8be6 type:MM_FILEPAGES val:33 [ 73.322939] BUG: Bad rss-counter state mm:00000000b10c8be6 type:MM_ANONPAGES val:22 [ 73.801613] BUG: Bad rss-counter state mm:00000000fe373ab9 type:MM_FILEPAGES val:33 [ 73.802653] BUG: Bad rss-counter state mm:00000000fe373ab9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61273' (ECDSA) to the list of known hosts. 2023/06/19 23:41:49 fuzzer started 2023/06/19 23:41:49 dialing manager at localhost:44161 2023/06/19 23:41:49 checking machine... 2023/06/19 23:41:49 checking revisions... [ 74.621364] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:41:50 testing simple program... [ 74.686400] cgroup: Unknown subsys name 'net' [ 74.731178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:41:02 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d8220 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=1ffff11001e0cf0d RSP=ffff88800f067860 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000287 R13=ffffea00005a7480 R14=ffffffff8366dfdf R15=ffff88800d959d00 RIP=ffffffff812e004a RFL=00000046 [---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 00007fc30fc75700 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=00007fe879f5c650 CR3=000000000dba2000 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=3a5d3932325b646873732039343a3134 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383930 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=0000000000000001 RBX=ffffffff85e2baf0 RCX=ffffffff81b48003 RDX=0000000000000003 RSI=ffffffff8617de5e RDI=ffffffff85e2bae0 RBP=ffffffff85e2bae0 RSP=ffff88806cf099c0 R8 =ffffffff8617de5e R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000002c9c3 R12=ffffffff85e2baec R13=ffffffff85e2bae0 R14=ffffffff85e2bae0 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000213 [----A-C] 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 00007fc30f473700 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=00007f0fcf637e90 CR3=000000000dba2000 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=2039343a31343a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a31343a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000