syzkaller login: [ 30.675017] BUG: Bad rss-counter state mm:000000000c1147d6 type:MM_FILEPAGES val:33 [ 30.676292] BUG: Bad rss-counter state mm:000000000c1147d6 type:MM_ANONPAGES val:22 [ 30.836722] ================================================================== [ 30.837691] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.838771] Read of size 8 at addr ffff888019c8bb38 by task sshd/227 [ 30.839586] [ 30.839845] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.840771] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.841790] Call Trace: [ 30.842129] [ 30.842430] dump_stack_lvl+0x91/0xf0 [ 30.842950] print_report+0xcc/0x620 [ 30.843463] ? __virt_addr_valid+0x102/0x340 [ 30.844055] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.844715] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.845361] kasan_report+0xbe/0xf0 [ 30.845868] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.846539] vma_interval_tree_remove+0xc75/0xec0 [ 30.847206] vma_prepare+0xc54/0x11a0 [ 30.847730] __split_vma+0x5af/0x950 [ 30.848266] ? __pfx___split_vma+0x10/0x10 [ 30.848843] ? find_held_lock+0x2c/0x110 [ 30.849414] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.850036] ? lock_is_held_type+0x9f/0x120 [ 30.850630] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.851296] ? mtree_range_walk+0x632/0x900 [ 30.851920] ? mas_walk+0x5c7/0x7c0 [ 30.852442] do_vmi_munmap+0x1f1/0x2b0 [ 30.852980] mmap_region+0x1f9/0x2660 [ 30.853507] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.854073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.854851] ? __pfx_lock_acquire+0x10/0x10 [ 30.855444] ? __pfx_mmap_region+0x10/0x10 [ 30.856040] ? security_mmap_addr+0x7d/0xa0 [ 30.856627] ? get_unmapped_area+0x1f5/0x3f0 [ 30.857230] do_mmap+0x854/0xf00 [ 30.857710] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.858252] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.858873] ksys_mmap_pgoff+0x3af/0x500 [ 30.859427] do_syscall_64+0x3f/0x90 [ 30.859964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.860675] RIP: 0033:0x7f550f3a7d82 [ 30.861172] 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 [ 30.863516] RSP: 002b:00007ffe60c9dc98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.864527] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f550f3a7d82 [ 30.865462] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f550e7e1000 [ 30.866383] RBP: 00007f550e7e1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.867312] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8d36a1ec0 [ 30.868266] R13: 00007ffe60c9dcb0 R14: 00007ffe60c9dce0 R15: 00007ffe60c9e040 [ 30.869204] [ 30.869525] [ 30.869763] Allocated by task 220: [ 30.870232] kasan_save_stack+0x22/0x50 [ 30.870792] kasan_set_track+0x25/0x30 [ 30.871331] __kasan_slab_alloc+0x59/0x70 [ 30.871917] kmem_cache_alloc+0x16b/0x370 [ 30.872482] vm_area_dup+0x20/0x160 [ 30.872984] __split_vma+0x170/0x950 [ 30.873496] split_vma+0xc6/0x110 [ 30.873979] mprotect_fixup+0x8d2/0xb30 [ 30.874530] do_mprotect_pkey+0x87e/0xd40 [ 30.875108] __x64_sys_mprotect+0x78/0xc0 [ 30.875692] do_syscall_64+0x3f/0x90 [ 30.876237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876945] [ 30.877181] Freed by task 220: [ 30.877617] kasan_save_stack+0x22/0x50 [ 30.878169] kasan_set_track+0x25/0x30 [ 30.878718] kasan_save_free_info+0x2b/0x50 [ 30.879309] __kasan_slab_free+0x10a/0x190 [ 30.879919] kmem_cache_free+0x10d/0x4d0 [ 30.880473] rcu_core+0x8c8/0x2860 [ 30.880964] __do_softirq+0x1b7/0x7d4 [ 30.881489] [ 30.881727] Last potentially related work creation: [ 30.882368] kasan_save_stack+0x22/0x50 [ 30.882932] __kasan_record_aux_stack+0x8e/0xa0 [ 30.883564] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.884286] remove_vma+0x139/0x170 [ 30.884788] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.885405] do_vmi_munmap+0x1f1/0x2b0 [ 30.885944] __vm_munmap+0x138/0x3a0 [ 30.886458] __x64_sys_munmap+0x59/0x80 [ 30.887026] do_syscall_64+0x3f/0x90 [ 30.887539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.888260] [ 30.888497] The buggy address belongs to the object at ffff888019c8bae0 [ 30.888497] which belongs to the cache vm_area_struct of size 168 [ 30.890111] The buggy address is located 88 bytes inside of [ 30.890111] freed 168-byte region [ffff888019c8bae0, ffff888019c8bb88) [ 30.891660] [ 30.891906] The buggy address belongs to the physical page: [ 30.892635] page:000000004b6d07d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c8b [ 30.893832] memcg:ffff88800d292301 [ 30.894300] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.895006] page_type: 0xffffffff() [ 30.895500] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.896534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d292301 [ 30.897538] page dumped because: kasan: bad access detected [ 30.898292] [ 30.898532] Memory state around the buggy address: [ 30.899191] ffff888019c8ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.900144] ffff888019c8ba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.901096] >ffff888019c8bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.902019] ^ [ 30.902676] ffff888019c8bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.903599] ffff888019c8bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.904535] ================================================================== [ 30.905627] Disabling lock debugging due to kernel taint [ 32.828476] BUG: Bad rss-counter state mm:000000003faa5afc type:MM_FILEPAGES val:33 [ 32.829638] BUG: Bad rss-counter state mm:000000003faa5afc type:MM_ANONPAGES val:22 [ 33.231123] BUG: Bad rss-counter state mm:00000000f5e02fef type:MM_FILEPAGES val:33 [ 33.232166] BUG: Bad rss-counter state mm:00000000f5e02fef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13776' (ECDSA) to the list of known hosts. 2023/06/20 19:32:32 fuzzer started 2023/06/20 19:32:32 dialing manager at localhost:36067 2023/06/20 19:32:32 checking machine... 2023/06/20 19:32:32 checking revisions... [ 33.970903] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:32:32 testing simple program... [ 34.014190] cgroup: Unknown subsys name 'net' [ 34.066103] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:32:31 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff83641156 RDX=0000000000000007 RSI=ffffffff863b4250 RDI=ffffffff85fa57f4 RBP=ffffffff85fa57f4 RSP=ffff8880143e7388 R8 =ffffffff863b4250 R9 =ffff8880143e7480 R10=0000000000038001 R11=000000000008ab8c R12=ffffffff85fa5810 R13=ffffffff85fa57f4 R14=ffffffff85fa57f4 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000217 [----APC] 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 00007f5d1b5b4900 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=00007f5d1aa31ec0 CR3=000000000d83a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=764c064faeabdb1c00000000000ae988 XMM05=7a420eb5c118bfee0000000000132a88 XMM06=e8008b1642ea3e600000000000131b28 XMM07=fb795ef6d65770560000000000121dc8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=800000001705c067 RCX=800000001705c067 RDX=ffff88800e4f5cf8 RSI=00007ffdde79f000 RDI=ffff88800e130740 RBP=ffff888016b27d90 RSP=ffff888016b27bf0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000000000 R13=ffff88800e130740 R14=00007ffdde79f000 R15=800000001705c067 RIP=ffffffff81141b46 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd4c2b0b900 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=00007ffdde79f9ec CR3=000000000e6fe000 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=00000000000000000000000000000000 XMM02=000000000000000000000000000000ff XMM03=d1a69e5bd9f463afb6007f38ee7af4b3 XMM04=de7eb8e54d854b68b51c5965e2578d43 XMM05=000000000000000000ff0000000000ff XMM06=d17e9e5b4d854b68b5005938e2578d43 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000