syzkaller login: [ 103.248826] BUG: Bad rss-counter state mm:00000000613b821f type:MM_FILEPAGES val:33 [ 103.250088] BUG: Bad rss-counter state mm:00000000613b821f type:MM_ANONPAGES val:22 [ 103.403533] ================================================================== [ 103.404539] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 103.405717] Read of size 8 at addr ffff88800e20c140 by task sshd/220 [ 103.406593] [ 103.406838] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 103.408003] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 103.409081] Call Trace: [ 103.409427] [ 103.409720] dump_stack_lvl+0x91/0xf0 [ 103.410206] print_report+0xcc/0x620 [ 103.410804] ? __virt_addr_valid+0x102/0x340 [ 103.411421] ? vma_interval_tree_remove+0xc75/0xec0 [ 103.412107] ? vma_interval_tree_remove+0xc75/0xec0 [ 103.412737] kasan_report+0xbe/0xf0 [ 103.413210] ? vma_interval_tree_remove+0xc75/0xec0 [ 103.413827] vma_interval_tree_remove+0xc75/0xec0 [ 103.414453] vma_prepare+0xc54/0x11a0 [ 103.414940] __split_vma+0x5af/0x950 [ 103.415442] ? __pfx___split_vma+0x10/0x10 [ 103.416060] ? find_held_lock+0x2c/0x110 [ 103.416684] do_vmi_align_munmap+0x2ba/0x11f0 [ 103.417342] ? lock_is_held_type+0x9f/0x120 [ 103.417882] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 103.418574] ? mtree_range_walk+0x632/0x900 [ 103.419212] ? mas_walk+0x5c7/0x7c0 [ 103.419764] do_vmi_munmap+0x1f1/0x2b0 [ 103.420341] mmap_region+0x1f9/0x2660 [ 103.420898] ? vm_mmap_pgoff+0x15c/0x3a0 [ 103.421501] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 103.422335] ? __pfx_lock_acquire+0x10/0x10 [ 103.422916] ? __pfx_mmap_region+0x10/0x10 [ 103.423446] ? security_mmap_addr+0x7d/0xa0 [ 103.423975] ? get_unmapped_area+0x1f5/0x3f0 [ 103.424531] do_mmap+0x854/0xf00 [ 103.424975] vm_mmap_pgoff+0x1a6/0x3a0 [ 103.425467] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 103.426030] ksys_mmap_pgoff+0x3af/0x500 [ 103.426569] do_syscall_64+0x3f/0x90 [ 103.427046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 103.427687] RIP: 0033:0x7fb6c9f17d82 [ 103.428143] 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 [ 103.430263] RSP: 002b:00007ffec31bd9d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 103.431199] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb6c9f17d82 [ 103.432048] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb6c9351000 [ 103.432894] RBP: 00007fb6c9351000 R08: 0000000000000009 R09: 0000000000001000 [ 103.433745] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560937abbec0 [ 103.434616] R13: 00007ffec31bd9f0 R14: 00007ffec31bda20 R15: 00007ffec31bdd80 [ 103.435473] [ 103.435766] [ 103.435980] Allocated by task 213: [ 103.436403] kasan_save_stack+0x22/0x50 [ 103.436902] kasan_set_track+0x25/0x30 [ 103.437401] __kasan_slab_alloc+0x59/0x70 [ 103.437918] kmem_cache_alloc+0x16b/0x370 [ 103.438473] vm_area_dup+0x20/0x160 [ 103.438929] __split_vma+0x170/0x950 [ 103.439395] split_vma+0xc6/0x110 [ 103.439834] mprotect_fixup+0x8d2/0xb30 [ 103.440345] do_mprotect_pkey+0x87e/0xd40 [ 103.440865] __x64_sys_mprotect+0x78/0xc0 [ 103.441383] do_syscall_64+0x3f/0x90 [ 103.441853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 103.442527] [ 103.442746] Freed by task 210: [ 103.443140] kasan_save_stack+0x22/0x50 [ 103.443643] kasan_set_track+0x25/0x30 [ 103.444136] kasan_save_free_info+0x2b/0x50 [ 103.444667] __kasan_slab_free+0x10a/0x190 [ 103.445201] kmem_cache_free+0x10d/0x4d0 [ 103.445784] rcu_core+0x8c8/0x2860 [ 103.446225] __do_softirq+0x1b7/0x7d4 [ 103.446749] [ 103.446967] Last potentially related work creation: [ 103.447554] kasan_save_stack+0x22/0x50 [ 103.448059] __kasan_record_aux_stack+0x8e/0xa0 [ 103.448632] __call_rcu_common.constprop.0+0x6a/0xb90 [ 103.449272] remove_vma+0x139/0x170 [ 103.449724] do_vmi_align_munmap+0xd4a/0x11f0 [ 103.450281] do_vmi_munmap+0x1f1/0x2b0 [ 103.450801] __vm_munmap+0x138/0x3a0 [ 103.451270] __x64_sys_munmap+0x59/0x80 [ 103.451782] do_syscall_64+0x3f/0x90 [ 103.452271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 103.452911] [ 103.453126] The buggy address belongs to the object at ffff88800e20c0e8 [ 103.453126] which belongs to the cache vm_area_struct of size 168 [ 103.454625] The buggy address is located 88 bytes inside of [ 103.454625] freed 168-byte region [ffff88800e20c0e8, ffff88800e20c190) [ 103.456023] [ 103.456241] The buggy address belongs to the physical page: [ 103.456906] page:000000004436fbbf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe20c [ 103.457970] memcg:ffff8880163b8c01 [ 103.458417] flags: 0x100000000000200(slab|node=0|zone=1) [ 103.459069] page_type: 0xffffffff() [ 103.459524] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 103.460440] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880163b8c01 [ 103.461346] page dumped because: kasan: bad access detected [ 103.462006] [ 103.462225] Memory state around the buggy address: [ 103.462839] ffff88800e20c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 103.463698] ffff88800e20c080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 103.464557] >ffff88800e20c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 103.465412] ^ [ 103.466049] ffff88800e20c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 103.466944] ffff88800e20c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 103.467797] ================================================================== [ 103.468803] Disabling lock debugging due to kernel taint [ 105.413286] BUG: Bad rss-counter state mm:00000000ba4baa59 type:MM_FILEPAGES val:33 [ 105.414047] BUG: Bad rss-counter state mm:00000000ba4baa59 type:MM_ANONPAGES val:22 [ 105.894353] BUG: Bad rss-counter state mm:0000000031cc7472 type:MM_FILEPAGES val:33 [ 105.895059] BUG: Bad rss-counter state mm:0000000031cc7472 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62341' (ECDSA) to the list of known hosts. 2023/06/20 07:55:02 fuzzer started 2023/06/20 07:55:03 dialing manager at localhost:44161 2023/06/20 07:55:03 checking machine... 2023/06/20 07:55:03 checking revisions... [ 106.428163] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:55:03 testing simple program... [ 106.479843] cgroup: Unknown subsys name 'net' [ 106.520548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:53:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b40 RCX=ffffffff864b1901 RDX=1ffff1100d9c136a RSI=ffffffff8450d7d7 RDI=ffff88806ce09b48 RBP=000000000000000c RSP=ffff88806ce09a58 R8 =ffffffff864b19c0 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b53a6 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e7a0880 RIP=ffffffff813ad459 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=00007fa57198a730 CR3=00000000100da000 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=864baa59c0959290984e5c2fcbb3a86f XMM02=ec2efd57dc4c00df000000000012f388 XMM03=111f4894c6fe3f0d000000000012f458 XMM04=1f4e6ad0c73d105900000000000ae988 XMM05=2b9a3d845c4a985b0000000000144698 XMM06=4fda316b135da52b0000000000143488 XMM07=fb795ef6d65770560000000000133a90 XMM08=2c67c8bc2e329bc3000000000012f3f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000020 RBX=ffff888018d3b788 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888018d3b7c0 RBP=ffff88800ddb7280 RSP=ffff888008e57c68 R8 =0000000000000001 R9 =ffffed10011caf81 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800ddb7740 R14=ffffffff81ef2884 R15=ffff88800e7a0880 RIP=ffffffff8184638b RFL=00000046 [---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=00007f98b86f1618 CR3=000000000ded0000 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