syzkaller login: [ 61.513576] BUG: Bad rss-counter state mm:000000001906e29a type:MM_FILEPAGES val:33 [ 61.515314] BUG: Bad rss-counter state mm:000000001906e29a type:MM_ANONPAGES val:22 [ 61.678660] ================================================================== [ 61.679988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.681346] Read of size 8 at addr ffff88800d3c15c8 by task sshd/226 [ 61.682649] [ 61.682957] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.684227] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.685657] Call Trace: [ 61.686039] [ 61.686383] dump_stack_lvl+0x91/0xf0 [ 61.686974] print_report+0xcc/0x620 [ 61.687558] ? __virt_addr_valid+0x102/0x340 [ 61.688211] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.688962] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.689721] kasan_report+0xbe/0xf0 [ 61.690310] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.691070] vma_interval_tree_remove+0xc75/0xec0 [ 61.691807] vma_prepare+0xc54/0x11a0 [ 61.692392] __split_vma+0x5af/0x950 [ 61.692966] ? __pfx___split_vma+0x10/0x10 [ 61.693545] ? find_held_lock+0x2c/0x110 [ 61.694044] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.694579] ? lock_is_held_type+0x9f/0x120 [ 61.695091] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.695664] ? mtree_range_walk+0x632/0x900 [ 61.696185] ? mas_walk+0x5c7/0x7c0 [ 61.696640] do_vmi_munmap+0x1f1/0x2b0 [ 61.697108] mmap_region+0x1f9/0x2660 [ 61.697567] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.698050] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.698719] ? __pfx_lock_acquire+0x10/0x10 [ 61.699218] ? __pfx_mmap_region+0x10/0x10 [ 61.699715] ? security_mmap_addr+0x7d/0xa0 [ 61.700214] ? get_unmapped_area+0x1f5/0x3f0 [ 61.700730] do_mmap+0x854/0xf00 [ 61.701149] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.701624] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.702156] ksys_mmap_pgoff+0x3af/0x500 [ 61.702634] do_syscall_64+0x3f/0x90 [ 61.703091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.703709] RIP: 0033:0x7f9cd3dbdd82 [ 61.704154] 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 [ 61.706232] RSP: 002b:00007fff4438bf88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.707114] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9cd3dbdd82 [ 61.707923] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9cd31f7000 [ 61.708750] RBP: 00007f9cd31f7000 R08: 0000000000000009 R09: 0000000000001000 [ 61.709590] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d4e282ec0 [ 61.710429] R13: 00007fff4438bfa0 R14: 00007fff4438bfd0 R15: 00007fff4438c330 [ 61.711289] [ 61.711567] [ 61.711772] Allocated by task 219: [ 61.712189] kasan_save_stack+0x22/0x50 [ 61.712696] kasan_set_track+0x25/0x30 [ 61.713180] __kasan_slab_alloc+0x59/0x70 [ 61.713696] kmem_cache_alloc+0x16b/0x370 [ 61.714208] vm_area_dup+0x20/0x160 [ 61.714646] __split_vma+0x170/0x950 [ 61.715105] split_vma+0xc6/0x110 [ 61.715526] mprotect_fixup+0x8d2/0xb30 [ 61.716014] do_mprotect_pkey+0x87e/0xd40 [ 61.716517] __x64_sys_mprotect+0x78/0xc0 [ 61.717033] do_syscall_64+0x3f/0x90 [ 61.717493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.718150] [ 61.718358] Freed by task 219: [ 61.718751] kasan_save_stack+0x22/0x50 [ 61.719246] kasan_set_track+0x25/0x30 [ 61.719728] kasan_save_free_info+0x2b/0x50 [ 61.720248] __kasan_slab_free+0x10a/0x190 [ 61.720767] kmem_cache_free+0x10d/0x4d0 [ 61.721269] rcu_core+0x8c8/0x2860 [ 61.721714] __do_softirq+0x1b7/0x7d4 [ 61.722182] [ 61.722390] Last potentially related work creation: [ 61.723042] kasan_save_stack+0x22/0x50 [ 61.723522] __kasan_record_aux_stack+0x8e/0xa0 [ 61.724088] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.724725] remove_vma+0x139/0x170 [ 61.725165] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.725720] do_vmi_munmap+0x1f1/0x2b0 [ 61.726199] __vm_munmap+0x138/0x3a0 [ 61.726664] __x64_sys_munmap+0x59/0x80 [ 61.727154] do_syscall_64+0x3f/0x90 [ 61.727621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.728256] [ 61.728468] The buggy address belongs to the object at ffff88800d3c1570 [ 61.728468] which belongs to the cache vm_area_struct of size 168 [ 61.729897] The buggy address is located 88 bytes inside of [ 61.729897] freed 168-byte region [ffff88800d3c1570, ffff88800d3c1618) [ 61.731269] [ 61.731481] The buggy address belongs to the physical page: [ 61.732124] page:00000000750319f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd3c1 [ 61.733171] memcg:ffff88800cb02001 [ 61.733586] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.734216] page_type: 0xffffffff() [ 61.734646] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.735526] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb02001 [ 61.736418] page dumped because: kasan: bad access detected [ 61.737062] [ 61.737274] Memory state around the buggy address: [ 61.737850] ffff88800d3c1480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.738685] ffff88800d3c1500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 61.739527] >ffff88800d3c1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.740350] ^ [ 61.741008] ffff88800d3c1600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 61.741859] ffff88800d3c1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.742698] ================================================================== [ 61.743684] Disabling lock debugging due to kernel taint [ 63.777645] BUG: Bad rss-counter state mm:000000001b1d459d type:MM_FILEPAGES val:33 [ 63.778822] BUG: Bad rss-counter state mm:000000001b1d459d type:MM_ANONPAGES val:22 [ 64.354019] BUG: Bad rss-counter state mm:000000006900b254 type:MM_FILEPAGES val:33 [ 64.355180] BUG: Bad rss-counter state mm:000000006900b254 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22467' (ECDSA) to the list of known hosts. 2023/06/21 01:03:11 fuzzer started 2023/06/21 01:03:12 dialing manager at localhost:36067 2023/06/21 01:03:12 checking machine... 2023/06/21 01:03:12 checking revisions... [ 65.008305] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:03:12 testing simple program... [ 65.065016] cgroup: Unknown subsys name 'net' [ 65.122594] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:03:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888019b252b8 RCX=0000000000000000 RDX=1ffff11003364a58 RSI=0000000000000000 RDI=ffff888019b252c8 RBP=ffff888008f7a000 RSP=ffff8880165afd30 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000007 R11=00000000000b6a61 R12=ffff888019b251a0 R13=ffff888019b25200 R14=ffff888019b25278 R15=ffff888019b25210 RIP=ffffffff818c89d2 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 00007eff2437a900 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=00007eff24931618 CR3=000000000ee68000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86098092 RDX=1ffff1100d9e135b RSI=1ffff1100d9e1359 RDI=ffff88806cf09ad8 RBP=ffff88806cf09ac8 RSP=ffff88806cf099b0 R8 =ffffffff86098096 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09a70 R15=ffff88806cf09a70 RIP=ffffffff811310f5 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 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=00007ff1b6371b60 CR3=000000000942c000 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=1059da1cfe3369a6584d91c59d66def3 XMM02=ec2efd57dc4c00df000000000011acd0 XMM03=94c2d478bfec6110000000000011ada0 XMM04=f7baa7ccc973a25d00000000000ae988 XMM05=6860aeb314f8829d0000000000132420 XMM06=e74dd1a5f3ac43850000000000131ca0 XMM07=e042d86d42eb936e00000000001227c8 XMM08=94c2d478bfec6110000000000011ada0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000