syzkaller login: [ 30.704991] BUG: Bad rss-counter state mm:000000003134f7c7 type:MM_FILEPAGES val:33 [ 30.706174] BUG: Bad rss-counter state mm:000000003134f7c7 type:MM_ANONPAGES val:22 [ 30.851413] ================================================================== [ 30.852349] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.853308] Read of size 8 at addr ffff8880101416b0 by task sshd/220 [ 30.854120] [ 30.854353] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.855355] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.856356] Call Trace: [ 30.856686] [ 30.856975] dump_stack_lvl+0x91/0xf0 [ 30.857515] print_report+0xcc/0x620 [ 30.858010] ? __virt_addr_valid+0x102/0x340 [ 30.858603] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.859225] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.859844] kasan_report+0xbe/0xf0 [ 30.860322] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.860950] vma_interval_tree_remove+0xc75/0xec0 [ 30.861564] vma_prepare+0xc54/0x11a0 [ 30.862061] __split_vma+0x5af/0x950 [ 30.862570] ? __pfx___split_vma+0x10/0x10 [ 30.863099] ? find_held_lock+0x2c/0x110 [ 30.863623] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.864200] ? lock_is_held_type+0x9f/0x120 [ 30.864740] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.865354] ? mtree_range_walk+0x632/0x900 [ 30.865909] ? mas_walk+0x5c7/0x7c0 [ 30.866410] do_vmi_munmap+0x1f1/0x2b0 [ 30.866906] mmap_region+0x1f9/0x2660 [ 30.867392] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.867908] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.868629] ? __pfx_lock_acquire+0x10/0x10 [ 30.869162] ? __pfx_mmap_region+0x10/0x10 [ 30.869690] ? security_mmap_addr+0x7d/0xa0 [ 30.870244] ? get_unmapped_area+0x1f5/0x3f0 [ 30.870794] do_mmap+0x854/0xf00 [ 30.871241] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.871740] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.872312] ksys_mmap_pgoff+0x3af/0x500 [ 30.872827] do_syscall_64+0x3f/0x90 [ 30.873313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.873966] RIP: 0033:0x7f6e37591d82 [ 30.874437] 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 [ 30.876591] RSP: 002b:00007ffcf213af98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.877511] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e37591d82 [ 30.878374] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e369cb000 [ 30.879227] RBP: 00007f6e369cb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.880077] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571c808eec0 [ 30.880933] R13: 00007ffcf213afb0 R14: 00007ffcf213afe0 R15: 00007ffcf213b340 [ 30.881802] [ 30.882097] [ 30.882329] Allocated by task 213: [ 30.882759] kasan_save_stack+0x22/0x50 [ 30.883269] kasan_set_track+0x25/0x30 [ 30.883766] __kasan_slab_alloc+0x59/0x70 [ 30.884289] kmem_cache_alloc+0x16b/0x370 [ 30.884810] vm_area_dup+0x20/0x160 [ 30.885269] __split_vma+0x170/0x950 [ 30.885736] split_vma+0xc6/0x110 [ 30.886189] mprotect_fixup+0x8d2/0xb30 [ 30.886697] do_mprotect_pkey+0x87e/0xd40 [ 30.887222] __x64_sys_mprotect+0x78/0xc0 [ 30.887743] do_syscall_64+0x3f/0x90 [ 30.888214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.888861] [ 30.889078] Freed by task 213: [ 30.889473] kasan_save_stack+0x22/0x50 [ 30.889974] kasan_set_track+0x25/0x30 [ 30.890482] kasan_save_free_info+0x2b/0x50 [ 30.891016] __kasan_slab_free+0x10a/0x190 [ 30.891549] kmem_cache_free+0x10d/0x4d0 [ 30.892061] rcu_core+0x8c8/0x2860 [ 30.892509] __do_softirq+0x1b7/0x7d4 [ 30.892989] [ 30.893203] Last potentially related work creation: [ 30.893793] kasan_save_stack+0x22/0x50 [ 30.894317] __kasan_record_aux_stack+0x8e/0xa0 [ 30.894899] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.895540] remove_vma+0x139/0x170 [ 30.895999] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.896624] do_vmi_munmap+0x1f1/0x2b0 [ 30.897114] __vm_munmap+0x138/0x3a0 [ 30.897581] __x64_sys_munmap+0x59/0x80 [ 30.898083] do_syscall_64+0x3f/0x90 [ 30.898571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.899223] [ 30.899440] Second to last potentially related work creation: [ 30.900129] kasan_save_stack+0x22/0x50 [ 30.900632] __kasan_record_aux_stack+0x8e/0xa0 [ 30.901218] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.901862] remove_vma+0x139/0x170 [ 30.902332] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.902902] do_vmi_munmap+0x1f1/0x2b0 [ 30.903390] mmap_region+0x1f9/0x2660 [ 30.903872] do_mmap+0x854/0xf00 [ 30.904308] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.904803] ksys_mmap_pgoff+0x3af/0x500 [ 30.905307] do_syscall_64+0x3f/0x90 [ 30.905785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.906449] [ 30.906669] The buggy address belongs to the object at ffff888010141658 [ 30.906669] which belongs to the cache vm_area_struct of size 168 [ 30.908148] The buggy address is located 88 bytes inside of [ 30.908148] freed 168-byte region [ffff888010141658, ffff888010141700) [ 30.909565] [ 30.909782] The buggy address belongs to the physical page: [ 30.910448] page:000000000e9efc66 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10141 [ 30.911554] memcg:ffff88800f217e01 [ 30.911986] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.912639] page_type: 0xffffffff() [ 30.913097] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.914021] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f217e01 [ 30.914960] page dumped because: kasan: bad access detected [ 30.915632] [ 30.915848] Memory state around the buggy address: [ 30.916431] ffff888010141580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.917288] ffff888010141600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.918157] >ffff888010141680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.919012] ^ [ 30.919605] ffff888010141700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.920463] ffff888010141780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.921314] ================================================================== [ 30.922433] Disabling lock debugging due to kernel taint [ 33.268810] BUG: Bad rss-counter state mm:000000000c716b3c type:MM_FILEPAGES val:33 [ 33.270331] BUG: Bad rss-counter state mm:000000000c716b3c type:MM_ANONPAGES val:22 [ 33.734879] BUG: Bad rss-counter state mm:00000000515d2323 type:MM_FILEPAGES val:33 [ 33.736138] BUG: Bad rss-counter state mm:00000000515d2323 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31919' (ECDSA) to the list of known hosts. 2023/06/21 07:35:28 fuzzer started 2023/06/21 07:35:28 dialing manager at localhost:36067 2023/06/21 07:35:28 checking machine... 2023/06/21 07:35:28 checking revisions... [ 34.413492] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:35:28 testing simple program... [ 34.461152] cgroup: Unknown subsys name 'net' [ 34.514463] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:35:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016c55240 RCX=0000000000000000 RDX=0000000000000001 RSI=ffff888016c55240 RDI=ffff88806ce395c0 RBP=dffffc0000000000 RSP=ffff88806ce09d20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=000000171b8f02d0 R12=ffff88806ce39500 R13=0000000000000000 R14=ffff888016c551c0 R15=ffff88806ce395c0 RIP=ffffffff81255b72 RFL=00000096 [--S-AP-] 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 00007f867cc58900 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=00007f867c0b2c30 CR3=000000000d49c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=63ac2010cbbefe6100000000000ae988 XMM05=2a4669e868688abe0000000000133e90 XMM06=e4cb8bb95a7664b60000000000132d28 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff846000aa RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110028c6e79 RSI=ffffffff846000aa RDI=ffff888014637438 RBP=ffff888014637408 RSP=ffff888014637368 R8 =0000000000000001 R9 =ffff8880146373b0 R10=0000000000038001 R11=00000000000b5080 R12=ffff888014637438 R13=0000000000000000 R14=ffff8880169f51c0 R15=0000000000002000 RIP=ffffffff813ad470 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 00007fa2da81e900 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=00007fa2dadd5618 CR3=000000000d89a000 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