syzkaller login: [ 122.577412] BUG: Bad rss-counter state mm:000000001302162e type:MM_FILEPAGES val:33 [ 122.579482] BUG: Bad rss-counter state mm:000000001302162e type:MM_ANONPAGES val:22 [ 122.771063] ================================================================== [ 122.772097] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 122.773139] Read of size 8 at addr ffff8880187add08 by task sshd/222 [ 122.774095] [ 122.774348] CPU: 0 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 122.775485] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 122.776597] Call Trace: [ 122.776955] [ 122.777269] dump_stack_lvl+0x91/0xf0 [ 122.777811] print_report+0xcc/0x620 [ 122.778364] ? __virt_addr_valid+0x102/0x340 [ 122.778980] ? vma_interval_tree_remove+0xc75/0xec0 [ 122.779669] ? vma_interval_tree_remove+0xc75/0xec0 [ 122.780316] kasan_report+0xbe/0xf0 [ 122.780827] ? vma_interval_tree_remove+0xc75/0xec0 [ 122.781515] vma_interval_tree_remove+0xc75/0xec0 [ 122.782189] vma_prepare+0xc54/0x11a0 [ 122.782741] __split_vma+0x5af/0x950 [ 122.783264] ? __pfx___split_vma+0x10/0x10 [ 122.783855] ? find_held_lock+0x2c/0x110 [ 122.784395] do_vmi_align_munmap+0x2ba/0x11f0 [ 122.785016] ? lock_is_held_type+0x9f/0x120 [ 122.785613] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 122.786308] ? mtree_range_walk+0x632/0x900 [ 122.786931] ? mas_walk+0x5c7/0x7c0 [ 122.787455] do_vmi_munmap+0x1f1/0x2b0 [ 122.788004] mmap_region+0x1f9/0x2660 [ 122.788539] ? vm_mmap_pgoff+0x15c/0x3a0 [ 122.789110] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 122.789890] ? __pfx_lock_acquire+0x10/0x10 [ 122.790495] ? __pfx_mmap_region+0x10/0x10 [ 122.791082] ? security_mmap_addr+0x7d/0xa0 [ 122.791671] ? get_unmapped_area+0x1f5/0x3f0 [ 122.792281] do_mmap+0x854/0xf00 [ 122.792772] vm_mmap_pgoff+0x1a6/0x3a0 [ 122.793329] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 122.793960] ksys_mmap_pgoff+0x3af/0x500 [ 122.794550] do_syscall_64+0x3f/0x90 [ 122.795086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 122.795808] RIP: 0033:0x7f57c68bbd82 [ 122.796324] 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 [ 122.798719] RSP: 002b:00007ffdfcd32108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 122.799742] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57c68bbd82 [ 122.800695] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f57c5cf5000 [ 122.801653] RBP: 00007f57c5cf5000 R08: 0000000000000009 R09: 0000000000001000 [ 122.802621] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556694c8cd90 [ 122.803584] R13: 00007ffdfcd32120 R14: 00007ffdfcd32150 R15: 00007ffdfcd324b0 [ 122.804546] [ 122.804874] [ 122.805117] Allocated by task 213: [ 122.805605] kasan_save_stack+0x22/0x50 [ 122.806178] kasan_set_track+0x25/0x30 [ 122.806756] __kasan_slab_alloc+0x59/0x70 [ 122.807343] kmem_cache_alloc+0x16b/0x370 [ 122.807933] vm_area_dup+0x20/0x160 [ 122.808449] __split_vma+0x170/0x950 [ 122.808967] split_vma+0xc6/0x110 [ 122.809429] mprotect_fixup+0x8d2/0xb30 [ 122.809989] do_mprotect_pkey+0x87e/0xd40 [ 122.810586] __x64_sys_mprotect+0x78/0xc0 [ 122.811175] do_syscall_64+0x3f/0x90 [ 122.811704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 122.812426] [ 122.812670] Freed by task 203: [ 122.813119] kasan_save_stack+0x22/0x50 [ 122.813691] kasan_set_track+0x25/0x30 [ 122.814256] kasan_save_free_info+0x2b/0x50 [ 122.814855] __kasan_slab_free+0x10a/0x190 [ 122.815461] kmem_cache_free+0x10d/0x4d0 [ 122.816036] rcu_core+0x8c8/0x2860 [ 122.816542] __do_softirq+0x1b7/0x7d4 [ 122.817087] [ 122.817333] Last potentially related work creation: [ 122.817999] kasan_save_stack+0x22/0x50 [ 122.818587] __kasan_record_aux_stack+0x8e/0xa0 [ 122.819238] __call_rcu_common.constprop.0+0x6a/0xb90 [ 122.819951] remove_vma+0x139/0x170 [ 122.820422] do_vmi_align_munmap+0xd4a/0x11f0 [ 122.821032] do_vmi_munmap+0x1f1/0x2b0 [ 122.821583] __vm_munmap+0x138/0x3a0 [ 122.822111] __x64_sys_munmap+0x59/0x80 [ 122.822683] do_syscall_64+0x3f/0x90 [ 122.823217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 122.823947] [ 122.824192] The buggy address belongs to the object at ffff8880187adcb0 [ 122.824192] which belongs to the cache vm_area_struct of size 168 [ 122.825862] The buggy address is located 88 bytes inside of [ 122.825862] freed 168-byte region [ffff8880187adcb0, ffff8880187add58) [ 122.827473] [ 122.827723] The buggy address belongs to the physical page: [ 122.828429] page:0000000098e162c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x187ad [ 122.829670] memcg:ffff888016d1cb01 [ 122.830146] flags: 0x100000000000200(slab|node=0|zone=1) [ 122.830867] page_type: 0xffffffff() [ 122.831361] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 122.832382] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d1cb01 [ 122.833370] page dumped because: kasan: bad access detected [ 122.834098] [ 122.834340] Memory state around the buggy address: [ 122.834980] ffff8880187adc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 122.835913] ffff8880187adc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 122.836847] >ffff8880187add00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 122.837780] ^ [ 122.838249] ffff8880187add80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 122.839168] ffff8880187ade00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 122.840121] ================================================================== [ 122.841214] Disabling lock debugging due to kernel taint [ 124.896983] BUG: Bad rss-counter state mm:00000000ced25437 type:MM_FILEPAGES val:33 [ 124.898163] BUG: Bad rss-counter state mm:00000000ced25437 type:MM_ANONPAGES val:22 [ 125.372723] BUG: Bad rss-counter state mm:00000000b9dc0d0c type:MM_FILEPAGES val:33 [ 125.373817] BUG: Bad rss-counter state mm:00000000b9dc0d0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25692' (ECDSA) to the list of known hosts. 2023/06/19 19:03:58 fuzzer started 2023/06/19 19:03:58 dialing manager at localhost:44161 2023/06/19 19:03:58 checking machine... 2023/06/19 19:03:58 checking revisions... [ 126.127055] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:03:59 testing simple program... [ 126.176163] cgroup: Unknown subsys name 'net' [ 126.220493] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:02:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8542a6c0 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c83e7 RDI=ffffffff856529e0 RBP=ffffffff86605973 RSP=ffff88806ce09a10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86605973 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800c6401b0 RIP=ffffffff8135bd09 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 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=00007fad016374e0 CR3=000000000e858000 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=2038353a33303a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a33303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000a RCX=ffffffff83726442 RDX=ffff888018460000 RSI=000000000000000a RDI=000000000000000a RBP=000000000000000b RSP=ffff8880185677b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96b30 R14=ffffffff83c63980 R15=0000000000000006 RIP=ffffffff814c02c8 RFL=00000293 [--S-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 00007fa9f3889900 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=00007fa9f3e40618 CR3=000000000eca8000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000