syzkaller login: [ 30.995550] BUG: Bad rss-counter state mm:00000000bbdd539f type:MM_FILEPAGES val:33 [ 30.996754] BUG: Bad rss-counter state mm:00000000bbdd539f type:MM_ANONPAGES val:22 [ 31.038801] ================================================================== [ 31.039743] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.040689] Read of size 8 at addr ffff8880161b0d08 by task sshd/220 [ 31.041468] [ 31.041685] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.042544] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.043511] Call Trace: [ 31.043827] [ 31.044108] dump_stack_lvl+0x91/0xf0 [ 31.044606] print_report+0xcc/0x620 [ 31.045097] ? __virt_addr_valid+0x102/0x340 [ 31.045645] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.046262] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.046873] kasan_report+0xbe/0xf0 [ 31.047346] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.047965] vma_interval_tree_remove+0xc75/0xec0 [ 31.048603] vma_prepare+0xc54/0x11a0 [ 31.049075] __split_vma+0x5af/0x950 [ 31.049541] ? __pfx___split_vma+0x10/0x10 [ 31.050068] ? find_held_lock+0x2c/0x110 [ 31.050585] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.051155] ? lock_is_held_type+0x9f/0x120 [ 31.051689] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.052305] ? mtree_range_walk+0x632/0x900 [ 31.052885] ? mas_walk+0x5c7/0x7c0 [ 31.053360] do_vmi_munmap+0x1f1/0x2b0 [ 31.053854] mmap_region+0x1f9/0x2660 [ 31.054338] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.054846] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.055562] ? __pfx_lock_acquire+0x10/0x10 [ 31.056091] ? __pfx_mmap_region+0x10/0x10 [ 31.056635] ? security_mmap_addr+0x7d/0xa0 [ 31.057167] ? get_unmapped_area+0x1f5/0x3f0 [ 31.057729] do_mmap+0x854/0xf00 [ 31.058185] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.058677] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.059243] ksys_mmap_pgoff+0x3af/0x500 [ 31.059756] do_syscall_64+0x3f/0x90 [ 31.060240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.060907] RIP: 0033:0x7f6c8a34fd82 [ 31.061366] 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 [ 31.063475] RSP: 002b:00007ffd696ae418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.064381] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c8a34fd82 [ 31.065219] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c89789000 [ 31.066057] RBP: 00007f6c89789000 R08: 0000000000000009 R09: 0000000000001000 [ 31.066901] R10: 0000000000000812 R11: 0000000000000206 R12: 00005650ae348d90 [ 31.067744] R13: 00007ffd696ae430 R14: 00007ffd696ae460 R15: 00007ffd696ae7c0 [ 31.068599] [ 31.068891] [ 31.069108] Allocated by task 213: [ 31.069543] kasan_save_stack+0x22/0x50 [ 31.070044] kasan_set_track+0x25/0x30 [ 31.070537] __kasan_slab_alloc+0x59/0x70 [ 31.071056] kmem_cache_alloc+0x16b/0x370 [ 31.071564] vm_area_dup+0x20/0x160 [ 31.072016] __split_vma+0x170/0x950 [ 31.072495] split_vma+0xc6/0x110 [ 31.072928] mprotect_fixup+0x8d2/0xb30 [ 31.073423] do_mprotect_pkey+0x87e/0xd40 [ 31.073938] __x64_sys_mprotect+0x78/0xc0 [ 31.074458] do_syscall_64+0x3f/0x90 [ 31.074925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.075567] [ 31.075779] Freed by task 19: [ 31.076166] kasan_save_stack+0x22/0x50 [ 31.076678] kasan_set_track+0x25/0x30 [ 31.077169] kasan_save_free_info+0x2b/0x50 [ 31.077698] __kasan_slab_free+0x10a/0x190 [ 31.078230] kmem_cache_free+0x10d/0x4d0 [ 31.078731] rcu_core+0x8c8/0x2860 [ 31.079171] __do_softirq+0x1b7/0x7d4 [ 31.079648] [ 31.079862] Last potentially related work creation: [ 31.080448] kasan_save_stack+0x22/0x50 [ 31.080947] __kasan_record_aux_stack+0x8e/0xa0 [ 31.081523] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.082157] remove_vma+0x139/0x170 [ 31.082605] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.083157] do_vmi_munmap+0x1f1/0x2b0 [ 31.083642] __vm_munmap+0x138/0x3a0 [ 31.084108] __x64_sys_munmap+0x59/0x80 [ 31.084636] do_syscall_64+0x3f/0x90 [ 31.085106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.085742] [ 31.085955] The buggy address belongs to the object at ffff8880161b0cb0 [ 31.085955] which belongs to the cache vm_area_struct of size 168 [ 31.087408] The buggy address is located 88 bytes inside of [ 31.087408] freed 168-byte region [ffff8880161b0cb0, ffff8880161b0d58) [ 31.088806] [ 31.089023] The buggy address belongs to the physical page: [ 31.089680] page:000000006c6dff67 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x161b0 [ 31.090769] memcg:ffff8880146bdd01 [ 31.091196] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.091843] page_type: 0xffffffff() [ 31.092295] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.093229] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146bdd01 [ 31.094134] page dumped because: kasan: bad access detected [ 31.094786] [ 31.095000] Memory state around the buggy address: [ 31.095582] ffff8880161b0c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.096440] ffff8880161b0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.097286] >ffff8880161b0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.098146] ^ [ 31.098590] ffff8880161b0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.099440] ffff8880161b0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.100296] ================================================================== [ 31.101591] Disabling lock debugging due to kernel taint [ 32.953704] BUG: Bad rss-counter state mm:0000000040f3d61d type:MM_FILEPAGES val:33 [ 32.954613] BUG: Bad rss-counter state mm:0000000040f3d61d type:MM_ANONPAGES val:22 [ 33.486550] BUG: Bad rss-counter state mm:00000000720740eb type:MM_FILEPAGES val:33 [ 33.487699] BUG: Bad rss-counter state mm:00000000720740eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43756' (ECDSA) to the list of known hosts. 2023/06/21 07:31:31 fuzzer started 2023/06/21 07:31:31 dialing manager at localhost:36067 2023/06/21 07:31:31 checking machine... 2023/06/21 07:31:31 checking revisions... [ 34.124721] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:31:31 testing simple program... [ 34.174248] cgroup: Unknown subsys name 'net' [ 34.225300] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:31:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8175d034 RDX=ffff88801464d1c0 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000043 RSP=ffff88800f287cf8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=000000001aa7d067 R13=ffff88801aa7d228 R14=ffff88800f287df0 R15=0000000000000000 RIP=ffffffff814c0438 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efd54f88900 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=00007efd5504550c CR3=0000000018cbc000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007fbac79fa000 CR3=0000000009bb6000 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=2031333a31333a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a31333a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000