syzkaller login: [ 30.800039] BUG: Bad rss-counter state mm:00000000ed3dce37 type:MM_FILEPAGES val:33 [ 30.801340] BUG: Bad rss-counter state mm:00000000ed3dce37 type:MM_ANONPAGES val:22 [ 30.839533] ================================================================== [ 30.840464] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.841432] Read of size 8 at addr ffff88800c5cb228 by task sshd/221 [ 30.842290] [ 30.842515] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.843402] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.844393] Call Trace: [ 30.844717] [ 30.845005] dump_stack_lvl+0x91/0xf0 [ 30.845500] print_report+0xcc/0x620 [ 30.845994] ? __virt_addr_valid+0x102/0x340 [ 30.846549] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847173] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847834] kasan_report+0xbe/0xf0 [ 30.848321] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.848963] vma_interval_tree_remove+0xc75/0xec0 [ 30.849578] vma_prepare+0xc54/0x11a0 [ 30.850065] __split_vma+0x5af/0x950 [ 30.850551] ? __pfx___split_vma+0x10/0x10 [ 30.851086] ? find_held_lock+0x2c/0x110 [ 30.851632] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.852208] ? lock_is_held_type+0x9f/0x120 [ 30.852766] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.853402] ? mtree_range_walk+0x632/0x900 [ 30.853961] ? mas_walk+0x5c7/0x7c0 [ 30.854449] do_vmi_munmap+0x1f1/0x2b0 [ 30.854960] mmap_region+0x1f9/0x2660 [ 30.855479] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.855999] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.856725] ? __pfx_lock_acquire+0x10/0x10 [ 30.857258] ? __pfx_mmap_region+0x10/0x10 [ 30.857797] ? security_mmap_addr+0x7d/0xa0 [ 30.858346] ? get_unmapped_area+0x1f5/0x3f0 [ 30.858908] do_mmap+0x854/0xf00 [ 30.859379] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.859887] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.860463] ksys_mmap_pgoff+0x3af/0x500 [ 30.860981] do_syscall_64+0x3f/0x90 [ 30.861475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862146] RIP: 0033:0x7f61645f9d82 [ 30.862615] 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 [ 30.864759] RSP: 002b:00007ffe35256058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.865679] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f61645f9d82 [ 30.866528] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6163a33000 [ 30.867400] RBP: 00007f6163a33000 R08: 0000000000000009 R09: 0000000000001000 [ 30.868244] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564196e76ec0 [ 30.869092] R13: 00007ffe35256070 R14: 00007ffe352560a0 R15: 00007ffe35256400 [ 30.869970] [ 30.870268] [ 30.870486] Allocated by task 214: [ 30.870915] kasan_save_stack+0x22/0x50 [ 30.871434] kasan_set_track+0x25/0x30 [ 30.871942] __kasan_slab_alloc+0x59/0x70 [ 30.872473] kmem_cache_alloc+0x16b/0x370 [ 30.872993] vm_area_dup+0x20/0x160 [ 30.873454] __split_vma+0x170/0x950 [ 30.873937] split_vma+0xc6/0x110 [ 30.874382] mprotect_fixup+0x8d2/0xb30 [ 30.874884] do_mprotect_pkey+0x87e/0xd40 [ 30.875425] __x64_sys_mprotect+0x78/0xc0 [ 30.875995] do_syscall_64+0x3f/0x90 [ 30.876498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877146] [ 30.877368] Freed by task 214: [ 30.877762] kasan_save_stack+0x22/0x50 [ 30.878270] kasan_set_track+0x25/0x30 [ 30.878768] kasan_save_free_info+0x2b/0x50 [ 30.879320] __kasan_slab_free+0x10a/0x190 [ 30.879862] kmem_cache_free+0x10d/0x4d0 [ 30.880377] rcu_core+0x8c8/0x2860 [ 30.880837] __do_softirq+0x1b7/0x7d4 [ 30.881314] [ 30.881536] Last potentially related work creation: [ 30.882151] kasan_save_stack+0x22/0x50 [ 30.882662] __kasan_record_aux_stack+0x8e/0xa0 [ 30.883251] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.883900] remove_vma+0x139/0x170 [ 30.884358] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.884931] do_vmi_munmap+0x1f1/0x2b0 [ 30.885424] __vm_munmap+0x138/0x3a0 [ 30.885898] __x64_sys_munmap+0x59/0x80 [ 30.886398] do_syscall_64+0x3f/0x90 [ 30.886879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887557] [ 30.887772] Second to last potentially related work creation: [ 30.888458] kasan_save_stack+0x22/0x50 [ 30.888969] __kasan_record_aux_stack+0x8e/0xa0 [ 30.889550] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.890199] remove_vma+0x139/0x170 [ 30.890658] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.891234] do_vmi_munmap+0x1f1/0x2b0 [ 30.891729] mmap_region+0x1f9/0x2660 [ 30.892212] do_mmap+0x854/0xf00 [ 30.892646] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.893151] ksys_mmap_pgoff+0x3af/0x500 [ 30.893655] do_syscall_64+0x3f/0x90 [ 30.894133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.894787] [ 30.895004] The buggy address belongs to the object at ffff88800c5cb1d0 [ 30.895004] which belongs to the cache vm_area_struct of size 168 [ 30.896511] The buggy address is located 88 bytes inside of [ 30.896511] freed 168-byte region [ffff88800c5cb1d0, ffff88800c5cb278) [ 30.897923] [ 30.898140] The buggy address belongs to the physical page: [ 30.898809] page:00000000cda07326 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5cb [ 30.899920] memcg:ffff888013f39901 [ 30.900352] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.901009] page_type: 0xffffffff() [ 30.901463] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.902394] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f39901 [ 30.903329] page dumped because: kasan: bad access detected [ 30.903994] [ 30.904212] Memory state around the buggy address: [ 30.904800] ffff88800c5cb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.905676] ffff88800c5cb180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.906546] >ffff88800c5cb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.907431] ^ [ 30.908004] ffff88800c5cb280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.908877] ffff88800c5cb300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.909736] ================================================================== [ 30.910887] Disabling lock debugging due to kernel taint [ 32.930658] BUG: Bad rss-counter state mm:0000000015b3d648 type:MM_FILEPAGES val:33 [ 32.932211] BUG: Bad rss-counter state mm:0000000015b3d648 type:MM_ANONPAGES val:22 [ 33.501832] BUG: Bad rss-counter state mm:0000000097e4e5e7 type:MM_FILEPAGES val:33 [ 33.503030] BUG: Bad rss-counter state mm:0000000097e4e5e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14123' (ECDSA) to the list of known hosts. 2023/06/20 20:33:50 fuzzer started 2023/06/20 20:33:51 dialing manager at localhost:36067 2023/06/20 20:33:51 checking machine... 2023/06/20 20:33:51 checking revisions... [ 34.192539] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:33:51 testing simple program... [ 34.232830] cgroup: Unknown subsys name 'net' [ 34.271910] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:33:50 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00007ffe34d5fbc0 RCX=0000000000000000 RDX=000000000000001a RSI=00007ffe34d5fbc0 RDI=0000555b4803b290 RBP=0000555b4803b290 RSP=00007ffe34d5f678 R8 =0000000000000001 R9 =0000000000133fc8 R10=0000000000000002 R11=000000000000d4fa R12=000000000000001a R13=000000000006d6c0 R14=0000000000000000 R15=00007ffe34d5f6b8 RIP=00007f74f79a06b0 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f74f6e1c900 00000000 00000000 GS =0000 0000000000000000 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=00007f74f6275cb0 CR3=000000000c970000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=00000000000000000000000000000000 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9f1eeb56d93dafd900000000000ae988 XMM05=d92548ac905b1a170000000000133ca0 XMM06=c291bd5c70af25b90000000000132d40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8450cc91 RBX=ffffffff8604ebe0 RCX=ffffffff8450cc7e RDX=0000000000000000 RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffffffff8604ebe0 RSP=ffff88806cf099e0 R8 =ffffffff864b2008 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffffffff8604ebe4 R13=ffffffff8604ebc4 R14=ffffffff8604ebdc R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000287 [--S--PC] 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 00007f4296f51700 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=00007f15f2645618 CR3=000000000c5d4000 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=2030353a33333a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a33333a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000