syzkaller login: [ 30.955244] BUG: Bad rss-counter state mm:0000000041e9034f type:MM_FILEPAGES val:33 [ 30.956445] BUG: Bad rss-counter state mm:0000000041e9034f type:MM_ANONPAGES val:22 [ 30.993079] ================================================================== [ 30.994062] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.995029] Read of size 8 at addr ffff88800f65ea50 by task sshd/220 [ 30.995902] [ 30.996121] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.996983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.997971] Call Trace: [ 30.998307] [ 30.998610] dump_stack_lvl+0x91/0xf0 [ 30.999114] print_report+0xcc/0x620 [ 30.999605] ? __virt_addr_valid+0x102/0x340 [ 31.000166] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.000802] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.001444] kasan_report+0xbe/0xf0 [ 31.001956] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.002629] vma_interval_tree_remove+0xc75/0xec0 [ 31.003277] vma_prepare+0xc54/0x11a0 [ 31.003795] __split_vma+0x5af/0x950 [ 31.004313] ? __pfx___split_vma+0x10/0x10 [ 31.004876] ? find_held_lock+0x2c/0x110 [ 31.005428] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.006035] ? lock_is_held_type+0x9f/0x120 [ 31.006635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.007288] ? mtree_range_walk+0x632/0x900 [ 31.007886] ? mas_walk+0x5c7/0x7c0 [ 31.008401] do_vmi_munmap+0x1f1/0x2b0 [ 31.008927] mmap_region+0x1f9/0x2660 [ 31.009442] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.009993] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.010771] ? __pfx_lock_acquire+0x10/0x10 [ 31.011340] ? __pfx_mmap_region+0x10/0x10 [ 31.011906] ? security_mmap_addr+0x7d/0xa0 [ 31.012478] ? get_unmapped_area+0x1f5/0x3f0 [ 31.013071] do_mmap+0x854/0xf00 [ 31.013541] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.014066] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.014688] ksys_mmap_pgoff+0x3af/0x500 [ 31.015241] do_syscall_64+0x3f/0x90 [ 31.015757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.016455] RIP: 0033:0x7f9ed0030d82 [ 31.016941] 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 [ 31.019282] RSP: 002b:00007fff14866ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.020257] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ed0030d82 [ 31.021163] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ecf46a000 [ 31.022070] RBP: 00007f9ecf46a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.023012] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9ad4e2d90 [ 31.023922] R13: 00007fff14866d00 R14: 00007fff14866d30 R15: 00007fff14867090 [ 31.024846] [ 31.025157] [ 31.025393] Allocated by task 213: [ 31.025853] kasan_save_stack+0x22/0x50 [ 31.026398] kasan_set_track+0x25/0x30 [ 31.026935] __kasan_slab_alloc+0x59/0x70 [ 31.027497] kmem_cache_alloc+0x16b/0x370 [ 31.028051] vm_area_dup+0x20/0x160 [ 31.028541] __split_vma+0x170/0x950 [ 31.029041] split_vma+0xc6/0x110 [ 31.029511] mprotect_fixup+0x8d2/0xb30 [ 31.030049] do_mprotect_pkey+0x87e/0xd40 [ 31.030611] __x64_sys_mprotect+0x78/0xc0 [ 31.031166] do_syscall_64+0x3f/0x90 [ 31.031676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.032373] [ 31.032604] Freed by task 213: [ 31.033024] kasan_save_stack+0x22/0x50 [ 31.033567] kasan_set_track+0x25/0x30 [ 31.034093] kasan_save_free_info+0x2b/0x50 [ 31.034683] __kasan_slab_free+0x10a/0x190 [ 31.035253] kmem_cache_free+0x10d/0x4d0 [ 31.035813] rcu_core+0x8c8/0x2860 [ 31.036285] __do_softirq+0x1b7/0x7d4 [ 31.036811] [ 31.037054] Last potentially related work creation: [ 31.037666] kasan_save_stack+0x22/0x50 [ 31.038198] __kasan_record_aux_stack+0x8e/0xa0 [ 31.038779] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.039425] remove_vma+0x139/0x170 [ 31.039881] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.040448] do_vmi_munmap+0x1f1/0x2b0 [ 31.040939] __vm_munmap+0x138/0x3a0 [ 31.041420] __x64_sys_munmap+0x59/0x80 [ 31.041920] do_syscall_64+0x3f/0x90 [ 31.042411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.043079] [ 31.043295] The buggy address belongs to the object at ffff88800f65e9f8 [ 31.043295] which belongs to the cache vm_area_struct of size 168 [ 31.044779] The buggy address is located 88 bytes inside of [ 31.044779] freed 168-byte region [ffff88800f65e9f8, ffff88800f65eaa0) [ 31.046213] [ 31.046432] The buggy address belongs to the physical page: [ 31.047123] page:00000000a1684671 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf65e [ 31.048212] memcg:ffff88800ccf5a01 [ 31.048641] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.049293] page_type: 0xffffffff() [ 31.049745] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.050682] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ccf5a01 [ 31.051592] page dumped because: kasan: bad access detected [ 31.052259] [ 31.052475] Memory state around the buggy address: [ 31.053050] ffff88800f65e900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.053911] ffff88800f65e980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.054776] >ffff88800f65ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.055637] ^ [ 31.056340] ffff88800f65ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.057202] ffff88800f65eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.058058] ================================================================== [ 31.059114] Disabling lock debugging due to kernel taint [ 33.016490] BUG: Bad rss-counter state mm:0000000017ff3d26 type:MM_FILEPAGES val:33 [ 33.017674] BUG: Bad rss-counter state mm:0000000017ff3d26 type:MM_ANONPAGES val:22 [ 33.463231] BUG: Bad rss-counter state mm:000000009eb04b34 type:MM_FILEPAGES val:33 [ 33.464395] BUG: Bad rss-counter state mm:000000009eb04b34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12237' (ECDSA) to the list of known hosts. 2023/06/21 06:28:13 fuzzer started 2023/06/21 06:28:13 dialing manager at localhost:36067 2023/06/21 06:28:13 checking machine... 2023/06/21 06:28:13 checking revisions... [ 34.083361] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:28:13 testing simple program... [ 34.130053] cgroup: Unknown subsys name 'net' [ 34.173985] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:28:13 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f254ec0 RCX=ffffffff81846775 RDX=1ffff11001e4a9d8 RSI=0000000000000000 RDI=ffff88800f254ec0 RBP=0000000000000000 RSP=ffff88801960f8d8 R8 =0000000000000001 R9 =ffffed1001e4a9da R10=ffff88800f254ed3 R11=0000000000000000 R12=ffffffff81845e00 R13=ffffea000063fec0 R14=ffffffff81c63c8c R15=0000000000000000 RIP=ffffffff811430c4 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 00007ff1bcb29700 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=00007f8c587a4160 CR3=0000000016b28000 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=2033313a38323a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a38323a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800d7acb40 RCX=ffff88800d7acb40 RDX=00000000000c000c RSI=ffff88800d7acb40 RDI=ffff888008fae000 RBP=ffff88800c65fa28 RSP=ffff88800c65f990 R8 =00000000800c000b R9 =0000000000000000 R10=ffffea000035eb00 R11=0000000000100007 R12=ffffea000035eb00 R13=0000000000000000 R14=00000000000c000b R15=ffff888008fae000 RIP=ffffffff81809672 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 00007efe34146900 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=00007fff96caf000 CR3=000000000e754000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000