syzkaller login: [ 30.865584] BUG: Bad rss-counter state mm:000000001afbddc2 type:MM_FILEPAGES val:33 [ 30.867124] BUG: Bad rss-counter state mm:000000001afbddc2 type:MM_ANONPAGES val:22 [ 31.048557] ================================================================== [ 31.049759] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.051099] Read of size 8 at addr ffff888016f0fa50 by task sshd/221 [ 31.052105] [ 31.052429] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.053460] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.054543] Call Trace: [ 31.054900] [ 31.055222] dump_stack_lvl+0x91/0xf0 [ 31.055767] print_report+0xcc/0x620 [ 31.056320] ? __virt_addr_valid+0x102/0x340 [ 31.056950] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.057649] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.058332] kasan_report+0xbe/0xf0 [ 31.058866] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.059552] vma_interval_tree_remove+0xc75/0xec0 [ 31.060213] vma_prepare+0xc54/0x11a0 [ 31.060756] __split_vma+0x5af/0x950 [ 31.061276] ? __pfx___split_vma+0x10/0x10 [ 31.061870] ? find_held_lock+0x2c/0x110 [ 31.062449] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.063076] ? lock_is_held_type+0x9f/0x120 [ 31.063671] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.064362] ? mtree_range_walk+0x632/0x900 [ 31.064974] ? mas_walk+0x5c7/0x7c0 [ 31.065497] do_vmi_munmap+0x1f1/0x2b0 [ 31.066060] mmap_region+0x1f9/0x2660 [ 31.066619] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.067194] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.067984] ? __pfx_lock_acquire+0x10/0x10 [ 31.068596] ? __pfx_mmap_region+0x10/0x10 [ 31.069181] ? security_mmap_addr+0x7d/0xa0 [ 31.069782] ? get_unmapped_area+0x1f5/0x3f0 [ 31.070391] do_mmap+0x854/0xf00 [ 31.070885] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.071440] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.072065] ksys_mmap_pgoff+0x3af/0x500 [ 31.072657] do_syscall_64+0x3f/0x90 [ 31.073188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.073916] RIP: 0033:0x7f6acd632d82 [ 31.074423] 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 [ 31.076831] RSP: 002b:00007fff1245a778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.077870] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6acd632d82 [ 31.078853] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6acca6c000 [ 31.079840] RBP: 00007f6acca6c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.080826] R10: 0000000000000812 R11: 0000000000000206 R12: 000056035799dd90 [ 31.081808] R13: 00007fff1245a790 R14: 00007fff1245a7c0 R15: 00007fff1245ab20 [ 31.082802] [ 31.083137] [ 31.083388] Allocated by task 214: [ 31.083882] kasan_save_stack+0x22/0x50 [ 31.084497] kasan_set_track+0x25/0x30 [ 31.085066] __kasan_slab_alloc+0x59/0x70 [ 31.085668] kmem_cache_alloc+0x16b/0x370 [ 31.086278] vm_area_dup+0x20/0x160 [ 31.086802] __split_vma+0x170/0x950 [ 31.087341] split_vma+0xc6/0x110 [ 31.087843] mprotect_fixup+0x8d2/0xb30 [ 31.088436] do_mprotect_pkey+0x87e/0xd40 [ 31.089029] __x64_sys_mprotect+0x78/0xc0 [ 31.089625] do_syscall_64+0x3f/0x90 [ 31.090165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.090958] [ 31.091204] Freed by task 204: [ 31.091654] kasan_save_stack+0x22/0x50 [ 31.092230] kasan_set_track+0x25/0x30 [ 31.092823] kasan_save_free_info+0x2b/0x50 [ 31.093430] __kasan_slab_free+0x10a/0x190 [ 31.094033] kmem_cache_free+0x10d/0x4d0 [ 31.094619] rcu_core+0x8c8/0x2860 [ 31.095124] __do_softirq+0x1b7/0x7d4 [ 31.095672] [ 31.095918] Last potentially related work creation: [ 31.096595] kasan_save_stack+0x22/0x50 [ 31.097167] __kasan_record_aux_stack+0x8e/0xa0 [ 31.097827] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.098566] remove_vma+0x139/0x170 [ 31.099084] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.099718] do_vmi_munmap+0x1f1/0x2b0 [ 31.100265] __vm_munmap+0x138/0x3a0 [ 31.100817] __x64_sys_munmap+0x59/0x80 [ 31.101382] do_syscall_64+0x3f/0x90 [ 31.101927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.102667] [ 31.102918] The buggy address belongs to the object at ffff888016f0f9f8 [ 31.102918] which belongs to the cache vm_area_struct of size 168 [ 31.104612] The buggy address is located 88 bytes inside of [ 31.104612] freed 168-byte region [ffff888016f0f9f8, ffff888016f0faa0) [ 31.106227] [ 31.106474] The buggy address belongs to the physical page: [ 31.107226] page:000000009eb51c45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f0f [ 31.108494] memcg:ffff88801030dc01 [ 31.108982] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.109729] page_type: 0xffffffff() [ 31.110235] raw: 0100000000000200 ffff8880087a0c80 ffffea0000317540 dead000000000002 [ 31.111282] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801030dc01 [ 31.112352] page dumped because: kasan: bad access detected [ 31.113131] [ 31.113371] Memory state around the buggy address: [ 31.114043] ffff888016f0f900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.115026] ffff888016f0f980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.115997] >ffff888016f0fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.116965] ^ [ 31.117763] ffff888016f0fa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.118735] ffff888016f0fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.119706] ================================================================== [ 31.120849] Disabling lock debugging due to kernel taint [ 32.671849] BUG: Bad rss-counter state mm:00000000fe948c5f type:MM_FILEPAGES val:33 [ 32.672946] BUG: Bad rss-counter state mm:00000000fe948c5f type:MM_ANONPAGES val:22 [ 33.238107] BUG: Bad rss-counter state mm:00000000d95d9e8a type:MM_FILEPAGES val:33 [ 33.239266] BUG: Bad rss-counter state mm:00000000d95d9e8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44866' (ECDSA) to the list of known hosts. 2023/06/20 18:46:38 fuzzer started 2023/06/20 18:46:38 dialing manager at localhost:36067 2023/06/20 18:46:38 checking machine... 2023/06/20 18:46:38 checking revisions... [ 33.844431] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:46:38 testing simple program... [ 33.893965] cgroup: Unknown subsys name 'net' [ 33.931322] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:46:37 Registers: info registers vcpu 0 RAX=0000000000028790 RBX=1ffff110011b3f90 RCX=dffffc0000000000 RDX=ffff88806ce28790 RSI=0000000000000000 RDI=ffffffff852c7900 RBP=ffff888008d91b40 RSP=ffff888008d9fc40 R8 =0000000000000001 R9 =1ffffffff0a58f20 R10=ffff888008d91f27 R11=1ffff1100d9c7479 R12=0000000000000002 R13=ffff888008d92450 R14=ffff888008d91b54 R15=ffff88806cf39500 RIP=ffffffff8124d55a RFL=00000012 [----A--] 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 0000000000000000 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=00007f22bc62d780 CR3=000000000d5f4000 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=0fa26c1526e1ffa6d448ba9e1b85bef1 XMM02=ec2efd57dc4c00df000000000011be18 XMM03=849c47f7fd2853f8000000000011bee8 XMM04=e7e9b9119c247bdb00000000000ae988 XMM05=2da174af480d9dd200000000001336d8 XMM06=c291bd5c70af25b900000000001324c8 XMM07=fb795ef6d65770560000000000122800 XMM08=2c67c8bc2e329bc3000000000011be88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880158c9b40 RSI=0000000000000000 RDI=0000000000000000 RBP=000000000000d14a RSP=ffff888018237960 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=2f6e6962732f7273 R12=ffff8880182379d8 R13=ffffed1003046f3c R14=ffffed1003046f3b R15=ffff8880182379e0 RIP=ffffffff814c0400 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 00007f017b755900 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=00007f017bd0d0b0 CR3=000000000f942000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000