syzkaller login: [ 33.114706] BUG: Bad rss-counter state mm:0000000077795224 type:MM_FILEPAGES val:33 [ 33.115719] BUG: Bad rss-counter state mm:0000000077795224 type:MM_ANONPAGES val:22 [ 33.271153] ================================================================== [ 33.272106] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.273048] Read of size 8 at addr ffff8880176cc6b0 by task sshd/220 [ 33.273822] [ 33.274043] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.275067] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.276038] Call Trace: [ 33.276364] [ 33.276651] dump_stack_lvl+0x91/0xf0 [ 33.277144] print_report+0xcc/0x620 [ 33.277672] ? __virt_addr_valid+0x102/0x340 [ 33.278268] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.278908] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.279545] kasan_report+0xbe/0xf0 [ 33.280032] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.280659] vma_interval_tree_remove+0xc75/0xec0 [ 33.281280] vma_prepare+0xc54/0x11a0 [ 33.281789] __split_vma+0x5af/0x950 [ 33.282260] ? __pfx___split_vma+0x10/0x10 [ 33.282799] ? find_held_lock+0x2c/0x110 [ 33.283325] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.283898] ? lock_is_held_type+0x9f/0x120 [ 33.284442] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.285058] ? mtree_range_walk+0x632/0x900 [ 33.285610] ? mas_walk+0x5c7/0x7c0 [ 33.286102] do_vmi_munmap+0x1f1/0x2b0 [ 33.286602] mmap_region+0x1f9/0x2660 [ 33.287085] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.287599] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.288326] ? __pfx_lock_acquire+0x10/0x10 [ 33.288870] ? __pfx_mmap_region+0x10/0x10 [ 33.289399] ? security_mmap_addr+0x7d/0xa0 [ 33.289947] ? get_unmapped_area+0x1f5/0x3f0 [ 33.290500] do_mmap+0x854/0xf00 [ 33.290940] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.291449] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.292015] ksys_mmap_pgoff+0x3af/0x500 [ 33.292528] do_syscall_64+0x3f/0x90 [ 33.293010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.293659] RIP: 0033:0x7fb8d9690d82 [ 33.294126] 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 [ 33.296251] RSP: 002b:00007ffdec203828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.297166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb8d9690d82 [ 33.298046] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb8d8aca000 [ 33.298907] RBP: 00007fb8d8aca000 R08: 0000000000000009 R09: 0000000000001000 [ 33.299762] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9c1ef9980 [ 33.300614] R13: 00007ffdec203840 R14: 00007ffdec203870 R15: 00007ffdec203bd0 [ 33.301489] [ 33.301800] [ 33.302016] Allocated by task 213: [ 33.302450] kasan_save_stack+0x22/0x50 [ 33.302961] kasan_set_track+0x25/0x30 [ 33.303461] __kasan_slab_alloc+0x59/0x70 [ 33.303988] kmem_cache_alloc+0x16b/0x370 [ 33.304508] vm_area_dup+0x20/0x160 [ 33.304982] __split_vma+0x170/0x950 [ 33.305456] split_vma+0xc6/0x110 [ 33.305921] mprotect_fixup+0x8d2/0xb30 [ 33.306440] do_mprotect_pkey+0x87e/0xd40 [ 33.306974] __x64_sys_mprotect+0x78/0xc0 [ 33.307499] do_syscall_64+0x3f/0x90 [ 33.307981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.308623] [ 33.308838] Freed by task 213: [ 33.309236] kasan_save_stack+0x22/0x50 [ 33.309754] kasan_set_track+0x25/0x30 [ 33.310253] kasan_save_free_info+0x2b/0x50 [ 33.310798] __kasan_slab_free+0x10a/0x190 [ 33.311349] kmem_cache_free+0x10d/0x4d0 [ 33.311865] rcu_core+0x8c8/0x2860 [ 33.312319] __do_softirq+0x1b7/0x7d4 [ 33.312798] [ 33.313022] Last potentially related work creation: [ 33.313612] kasan_save_stack+0x22/0x50 [ 33.314139] __kasan_record_aux_stack+0x8e/0xa0 [ 33.314719] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.315365] remove_vma+0x139/0x170 [ 33.315928] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.316499] do_vmi_munmap+0x1f1/0x2b0 [ 33.316991] __vm_munmap+0x138/0x3a0 [ 33.317467] __x64_sys_munmap+0x59/0x80 [ 33.317973] do_syscall_64+0x3f/0x90 [ 33.318457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.319108] [ 33.319326] The buggy address belongs to the object at ffff8880176cc658 [ 33.319326] which belongs to the cache vm_area_struct of size 168 [ 33.320787] The buggy address is located 88 bytes inside of [ 33.320787] freed 168-byte region [ffff8880176cc658, ffff8880176cc700) [ 33.322200] [ 33.322419] The buggy address belongs to the physical page: [ 33.323073] page:00000000ff804277 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x176cc [ 33.324166] memcg:ffff8880197e9101 [ 33.324596] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.325244] page_type: 0xffffffff() [ 33.325710] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.326626] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197e9101 [ 33.327536] page dumped because: kasan: bad access detected [ 33.328212] [ 33.328427] Memory state around the buggy address: [ 33.329022] ffff8880176cc580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.329894] ffff8880176cc600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.330745] >ffff8880176cc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.331617] ^ [ 33.332204] ffff8880176cc700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.333084] ffff8880176cc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.333966] ================================================================== [ 33.334886] Disabling lock debugging due to kernel taint [ 35.549279] BUG: Bad rss-counter state mm:0000000019cfb5af type:MM_FILEPAGES val:33 [ 35.550507] BUG: Bad rss-counter state mm:0000000019cfb5af type:MM_ANONPAGES val:22 [ 36.112478] BUG: Bad rss-counter state mm:00000000f7d54cba type:MM_FILEPAGES val:33 [ 36.113649] BUG: Bad rss-counter state mm:00000000f7d54cba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15941' (ECDSA) to the list of known hosts. 2023/06/20 07:13:00 fuzzer started 2023/06/20 07:13:00 dialing manager at localhost:44161 2023/06/20 07:13:00 checking machine... 2023/06/20 07:13:00 checking revisions... [ 36.727601] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:13:00 testing simple program... [ 36.772788] cgroup: Unknown subsys name 'net' [ 36.826840] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:12:55 Registers: info registers vcpu 0 RAX=ffffffff81807ebb RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002d20eea RSI=ffffffff81807ebb RDI=ffff8880169077c0 RBP=ffff888016907790 RSP=ffff8880169076f0 R8 =0000000000000001 R9 =ffff888016907738 R10=0000000000038001 R11=0000000000020de7 R12=ffff8880169077c0 R13=0000000000000000 R14=ffff888010073680 R15=0000000000000dc0 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007fdc8bdfd900 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=00007ffc55baf000 CR3=0000000015f14000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fcce8684000 CR3=000000000e466000 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=2039353a32313a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a32313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000