syzkaller login: [ 31.107471] BUG: Bad rss-counter state mm:00000000706ecf88 type:MM_FILEPAGES val:33 [ 31.109346] BUG: Bad rss-counter state mm:00000000706ecf88 type:MM_ANONPAGES val:22 [ 31.277730] ================================================================== [ 31.278816] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.279920] Read of size 8 at addr ffff888019eca6b0 by task sshd/220 [ 31.281022] [ 31.281283] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.282316] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.283500] Call Trace: [ 31.283883] <TASK> [ 31.284227] dump_stack_lvl+0x91/0xf0 [ 31.284836] print_report+0xcc/0x620 [ 31.285404] ? __virt_addr_valid+0x102/0x340 [ 31.286068] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.286802] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.287482] kasan_report+0xbe/0xf0 [ 31.287954] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288550] vma_interval_tree_remove+0xc75/0xec0 [ 31.289139] vma_prepare+0xc54/0x11a0 [ 31.289592] __split_vma+0x5af/0x950 [ 31.290064] ? __pfx___split_vma+0x10/0x10 [ 31.290566] ? find_held_lock+0x2c/0x110 [ 31.291103] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.291639] ? lock_is_held_type+0x9f/0x120 [ 31.292312] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.293054] ? mtree_range_walk+0x632/0x900 [ 31.293600] ? mas_walk+0x5c7/0x7c0 [ 31.294092] do_vmi_munmap+0x1f1/0x2b0 [ 31.294572] mmap_region+0x1f9/0x2660 [ 31.295077] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.295592] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.296344] ? __pfx_lock_acquire+0x10/0x10 [ 31.296919] ? __pfx_mmap_region+0x10/0x10 [ 31.297452] ? security_mmap_addr+0x7d/0xa0 [ 31.298000] ? get_unmapped_area+0x1f5/0x3f0 [ 31.298536] do_mmap+0x854/0xf00 [ 31.299003] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.299494] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.300067] ksys_mmap_pgoff+0x3af/0x500 [ 31.300587] do_syscall_64+0x3f/0x90 [ 31.301082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.301731] RIP: 0033:0x7f609f05bd82 [ 31.302196] 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 [ 31.304346] RSP: 002b:00007fff6836d808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.305292] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f609f05bd82 [ 31.306140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f609e495000 [ 31.307019] RBP: 00007f609e495000 R08: 0000000000000009 R09: 0000000000001000 [ 31.307876] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f89c4c1ec0 [ 31.308730] R13: 00007fff6836d820 R14: 00007fff6836d850 R15: 00007fff6836dbb0 [ 31.309604] </TASK> [ 31.309909] [ 31.310118] Allocated by task 213: [ 31.310539] kasan_save_stack+0x22/0x50 [ 31.311080] kasan_set_track+0x25/0x30 [ 31.311576] __kasan_slab_alloc+0x59/0x70 [ 31.312102] kmem_cache_alloc+0x16b/0x370 [ 31.312634] vm_area_dup+0x20/0x160 [ 31.313102] __split_vma+0x170/0x950 [ 31.313572] split_vma+0xc6/0x110 [ 31.314031] mprotect_fixup+0x8d2/0xb30 [ 31.314528] do_mprotect_pkey+0x87e/0xd40 [ 31.315074] __x64_sys_mprotect+0x78/0xc0 [ 31.315598] do_syscall_64+0x3f/0x90 [ 31.316090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.316756] [ 31.316993] Freed by task 213: [ 31.317386] kasan_save_stack+0x22/0x50 [ 31.317907] kasan_set_track+0x25/0x30 [ 31.318400] kasan_save_free_info+0x2b/0x50 [ 31.318959] __kasan_slab_free+0x10a/0x190 [ 31.319487] kmem_cache_free+0x10d/0x4d0 [ 31.320017] rcu_core+0x8c8/0x2860 [ 31.320451] __do_softirq+0x1b7/0x7d4 [ 31.320957] [ 31.321167] Last potentially related work creation: [ 31.321761] kasan_save_stack+0x22/0x50 [ 31.322277] __kasan_record_aux_stack+0x8e/0xa0 [ 31.322859] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.323509] remove_vma+0x139/0x170 [ 31.323986] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.324560] do_vmi_munmap+0x1f1/0x2b0 [ 31.325068] __vm_munmap+0x138/0x3a0 [ 31.325527] __x64_sys_munmap+0x59/0x80 [ 31.326035] do_syscall_64+0x3f/0x90 [ 31.326503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.327165] [ 31.327374] The buggy address belongs to the object at ffff888019eca658 [ 31.327374] which belongs to the cache vm_area_struct of size 168 [ 31.328888] The buggy address is located 88 bytes inside of [ 31.328888] freed 168-byte region [ffff888019eca658, ffff888019eca700) [ 31.330299] [ 31.330510] The buggy address belongs to the physical page: [ 31.331198] page:000000001c55e7d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19eca [ 31.332296] memcg:ffff88800f670001 [ 31.332736] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.333391] page_type: 0xffffffff() [ 31.333844] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.334773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f670001 [ 31.335679] page dumped because: kasan: bad access detected [ 31.336452] [ 31.336780] Memory state around the buggy address: [ 31.337567] ffff888019eca580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.338736] ffff888019eca600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.339882] >ffff888019eca680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.341031] ^ [ 31.341815] ffff888019eca700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.342910] ffff888019eca780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.344039] ================================================================== [ 31.345337] Disabling lock debugging due to kernel taint [ 33.324718] BUG: Bad rss-counter state mm:00000000e9426d31 type:MM_FILEPAGES val:33 [ 33.325664] BUG: Bad rss-counter state mm:00000000e9426d31 type:MM_ANONPAGES val:22 [ 33.803677] BUG: Bad rss-counter state mm:000000001bdde566 type:MM_FILEPAGES val:33 [ 33.805085] BUG: Bad rss-counter state mm:000000001bdde566 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44513' (ECDSA) to the list of known hosts. 2023/06/20 21:44:20 fuzzer started 2023/06/20 21:44:20 dialing manager at localhost:36067 2023/06/20 21:44:20 checking machine... 2023/06/20 21:44:20 checking revisions... [ 34.510776] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:44:20 testing simple program... [ 34.550777] cgroup: Unknown subsys name 'net' [ 34.601202] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:44:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001e5974f RSI=ffffffff83ab1b24 RDI=ffff88800f2cba78 RBP=ffff88800f2cb680 RSP=ffff888019e7f4d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000009dd000009dd R12=ffff88800f2cb680 R13=000000000000002e R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff81374562 RFL=00000212 [----A--] 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 00007f45e7c22900 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=00007f45e81d9618 CR3=000000000c98a000 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=ffff88806cf09a98 RBX=0000000000000002 RCX=ffff88806cf09b38 RDX=1ffff1100d9e135c RSI=ffff88806cf09a68 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffffed100d9e1355 R13=ffff88806cf09ae0 R14=ffff88806cf09ae0 R15=ffff88806cf09a98 RIP=ffffffff81130669 RFL=00000282 [--S----] 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=00007ff89f7b4ca0 CR3=0000000013a3e000 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=771218d4ce1021b7c5434e648a371ac9 XMM02=000000000011d6e0ec2efd57dc4c00df XMM03=0000000000121e484584596249a85e4c XMM04=e055387e7bfe0c6c00000000000ae988 XMM05=62192fb6398affbd0000000000132a60 XMM06=4fda316b135da52b0000000000131b00 XMM07=e042d86d42eb936e00000000001220c8 XMM08=4584596249a85e4c000000000011d740 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000