syzkaller login: [ 28.809975] BUG: Bad rss-counter state mm:000000000091f872 type:MM_FILEPAGES val:33 [ 28.811245] BUG: Bad rss-counter state mm:000000000091f872 type:MM_ANONPAGES val:22 [ 29.026218] ================================================================== [ 29.027312] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.028542] Read of size 8 at addr ffff88800e2c34e0 by task sshd/221 [ 29.029448] [ 29.029702] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.030757] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.031943] Call Trace: [ 29.032341] [ 29.032673] dump_stack_lvl+0x91/0xf0 [ 29.033260] print_report+0xcc/0x620 [ 29.033831] ? __virt_addr_valid+0x102/0x340 [ 29.034500] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.035279] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.036000] kasan_report+0xbe/0xf0 [ 29.036576] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.037326] vma_interval_tree_remove+0xc75/0xec0 [ 29.038040] vma_prepare+0xc54/0x11a0 [ 29.038614] __split_vma+0x5af/0x950 [ 29.039231] ? __pfx___split_vma+0x10/0x10 [ 29.039860] ? find_held_lock+0x2c/0x110 [ 29.040497] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.041176] ? lock_is_held_type+0x9f/0x120 [ 29.041825] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.042564] ? mtree_range_walk+0x632/0x900 [ 29.043272] ? mas_walk+0x5c7/0x7c0 [ 29.043842] do_vmi_munmap+0x1f1/0x2b0 [ 29.044445] mmap_region+0x1f9/0x2660 [ 29.045017] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.045627] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.046558] ? __pfx_lock_acquire+0x10/0x10 [ 29.047304] ? __pfx_mmap_region+0x10/0x10 [ 29.047940] ? security_mmap_addr+0x7d/0xa0 [ 29.048587] ? get_unmapped_area+0x1f5/0x3f0 [ 29.049281] do_mmap+0x854/0xf00 [ 29.049798] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.050436] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.051137] ksys_mmap_pgoff+0x3af/0x500 [ 29.051762] do_syscall_64+0x3f/0x90 [ 29.052340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.053113] RIP: 0033:0x7f618d73ad82 [ 29.053686] 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 [ 29.056276] RSP: 002b:00007fff996cd448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.057380] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f618d73ad82 [ 29.058412] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f618cb74000 [ 29.059468] RBP: 00007f618cb74000 R08: 0000000000000009 R09: 0000000000001000 [ 29.060486] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa1773aec0 [ 29.061503] R13: 00007fff996cd460 R14: 00007fff996cd490 R15: 00007fff996cd7f0 [ 29.062514] [ 29.062850] [ 29.063109] Allocated by task 212: [ 29.063648] kasan_save_stack+0x22/0x50 [ 29.064260] kasan_set_track+0x25/0x30 [ 29.064826] __kasan_slab_alloc+0x59/0x70 [ 29.065457] kmem_cache_alloc+0x16b/0x370 [ 29.066055] vm_area_dup+0x20/0x160 [ 29.066587] __split_vma+0x170/0x950 [ 29.067156] split_vma+0xc6/0x110 [ 29.067686] mprotect_fixup+0x8d2/0xb30 [ 29.068298] do_mprotect_pkey+0x87e/0xd40 [ 29.068892] __x64_sys_mprotect+0x78/0xc0 [ 29.069609] do_syscall_64+0x3f/0x90 [ 29.070172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.070917] [ 29.071197] Freed by task 212: [ 29.071652] kasan_save_stack+0x22/0x50 [ 29.072204] kasan_set_track+0x25/0x30 [ 29.072707] kasan_save_free_info+0x2b/0x50 [ 29.073252] __kasan_slab_free+0x10a/0x190 [ 29.073785] kmem_cache_free+0x10d/0x4d0 [ 29.074309] rcu_core+0x8c8/0x2860 [ 29.074759] __do_softirq+0x1b7/0x7d4 [ 29.075258] [ 29.075473] Last potentially related work creation: [ 29.076055] kasan_save_stack+0x22/0x50 [ 29.076582] __kasan_record_aux_stack+0x8e/0xa0 [ 29.077172] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.077812] remove_vma+0x139/0x170 [ 29.078286] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.078844] do_vmi_munmap+0x1f1/0x2b0 [ 29.079367] __vm_munmap+0x138/0x3a0 [ 29.079836] __x64_sys_munmap+0x59/0x80 [ 29.080360] do_syscall_64+0x3f/0x90 [ 29.080838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.081493] [ 29.081711] Second to last potentially related work creation: [ 29.082403] kasan_save_stack+0x22/0x50 [ 29.082906] __kasan_record_aux_stack+0x8e/0xa0 [ 29.083500] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.084169] remove_vma+0x139/0x170 [ 29.084653] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.085238] do_vmi_munmap+0x1f1/0x2b0 [ 29.085732] mmap_region+0x1f9/0x2660 [ 29.086236] do_mmap+0x854/0xf00 [ 29.086681] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.087226] ksys_mmap_pgoff+0x3af/0x500 [ 29.087749] do_syscall_64+0x3f/0x90 [ 29.088262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.088930] [ 29.089159] The buggy address belongs to the object at ffff88800e2c3488 [ 29.089159] which belongs to the cache vm_area_struct of size 168 [ 29.090673] The buggy address is located 88 bytes inside of [ 29.090673] freed 168-byte region [ffff88800e2c3488, ffff88800e2c3530) [ 29.092162] [ 29.092391] The buggy address belongs to the physical page: [ 29.093066] page:000000003d35067e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2c3 [ 29.094213] memcg:ffff88800d8e6801 [ 29.094650] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.095340] page_type: 0xffffffff() [ 29.095809] raw: 0100000000000200 ffff8880087a0c80 ffffea0000360a40 dead000000000002 [ 29.096811] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8e6801 [ 29.097777] page dumped because: kasan: bad access detected [ 29.098478] [ 29.098701] Memory state around the buggy address: [ 29.099346] ffff88800e2c3380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.100259] ffff88800e2c3400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 29.101149] >ffff88800e2c3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.102047] ^ [ 29.102858] ffff88800e2c3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 29.103785] ffff88800e2c3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.104672] ================================================================== [ 29.105663] Disabling lock debugging due to kernel taint [ 31.229541] BUG: Bad rss-counter state mm:000000001a5a4d9a type:MM_FILEPAGES val:33 [ 31.230800] BUG: Bad rss-counter state mm:000000001a5a4d9a type:MM_ANONPAGES val:22 [ 31.608915] BUG: Bad rss-counter state mm:0000000062acda2d type:MM_FILEPAGES val:33 [ 31.609919] BUG: Bad rss-counter state mm:0000000062acda2d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30108' (ECDSA) to the list of known hosts. 2023/06/21 02:16:02 fuzzer started 2023/06/21 02:16:03 dialing manager at localhost:36067 2023/06/21 02:16:03 checking machine... 2023/06/21 02:16:03 checking revisions... [ 32.338879] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:16:03 testing simple program... [ 32.389131] cgroup: Unknown subsys name 'net' [ 32.436833] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:16:02 Registers: info registers vcpu 0 RAX=1ffff110023d218f RBX=ffff888011e90c48 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888011e90c78 RBP=ffff888011371be0 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888019a92a00 R14=ffffffff818d9c06 R15=ffff88800d364980 RIP=ffffffff818464e2 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 00007f5ae1cbe900 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=00007f5ae22760b0 CR3=0000000015c00000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 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=00007ffd53bbe6b8 CR3=0000000016d42000 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=2032303a36313a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a36313a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000