syzkaller login: [ 41.305976] BUG: Bad rss-counter state mm:000000002f8a6d97 type:MM_FILEPAGES val:33 [ 41.308211] BUG: Bad rss-counter state mm:000000002f8a6d97 type:MM_ANONPAGES val:22 [ 41.473857] ================================================================== [ 41.475021] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.476007] Read of size 8 at addr ffff88800ed4d228 by task sshd/220 [ 41.476984] [ 41.477220] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.478121] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.479185] Call Trace: [ 41.479516] [ 41.479815] dump_stack_lvl+0x91/0xf0 [ 41.480321] print_report+0xcc/0x620 [ 41.480832] ? __virt_addr_valid+0x102/0x340 [ 41.481400] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.482040] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.482702] kasan_report+0xbe/0xf0 [ 41.483191] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.483848] vma_interval_tree_remove+0xc75/0xec0 [ 41.484484] vma_prepare+0xc54/0x11a0 [ 41.484994] __split_vma+0x5af/0x950 [ 41.485494] ? __pfx___split_vma+0x10/0x10 [ 41.486049] ? find_held_lock+0x2c/0x110 [ 41.486621] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.487228] ? lock_is_held_type+0x9f/0x120 [ 41.487802] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.488450] ? mtree_range_walk+0x632/0x900 [ 41.489038] ? mas_walk+0x5c7/0x7c0 [ 41.489540] do_vmi_munmap+0x1f1/0x2b0 [ 41.490071] mmap_region+0x1f9/0x2660 [ 41.490605] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.491143] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.491897] ? __pfx_lock_acquire+0x10/0x10 [ 41.492462] ? __pfx_mmap_region+0x10/0x10 [ 41.493028] ? security_mmap_addr+0x7d/0xa0 [ 41.493584] ? get_unmapped_area+0x1f5/0x3f0 [ 41.494161] do_mmap+0x854/0xf00 [ 41.494645] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.495176] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.495769] ksys_mmap_pgoff+0x3af/0x500 [ 41.496309] do_syscall_64+0x3f/0x90 [ 41.496815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.497494] RIP: 0033:0x7ff9bb141d82 [ 41.497980] 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 [ 41.500207] RSP: 002b:00007fff1d0adb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.501146] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff9bb141d82 [ 41.502034] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff9ba57b000 [ 41.502920] RBP: 00007ff9ba57b000 R08: 0000000000000009 R09: 0000000000001000 [ 41.503788] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558694024ec0 [ 41.504673] R13: 00007fff1d0adb80 R14: 00007fff1d0adbb0 R15: 00007fff1d0adf10 [ 41.505574] [ 41.505876] [ 41.506101] Allocated by task 213: [ 41.506564] kasan_save_stack+0x22/0x50 [ 41.507106] kasan_set_track+0x25/0x30 [ 41.507619] __kasan_slab_alloc+0x59/0x70 [ 41.508165] kmem_cache_alloc+0x16b/0x370 [ 41.508700] vm_area_dup+0x20/0x160 [ 41.509183] __split_vma+0x170/0x950 [ 41.509668] split_vma+0xc6/0x110 [ 41.510125] mprotect_fixup+0x8d2/0xb30 [ 41.510650] do_mprotect_pkey+0x87e/0xd40 [ 41.511190] __x64_sys_mprotect+0x78/0xc0 [ 41.511733] do_syscall_64+0x3f/0x90 [ 41.512229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.512897] [ 41.513119] Freed by task 213: [ 41.513527] kasan_save_stack+0x22/0x50 [ 41.514051] kasan_set_track+0x25/0x30 [ 41.514570] kasan_save_free_info+0x2b/0x50 [ 41.515127] __kasan_slab_free+0x10a/0x190 [ 41.515685] kmem_cache_free+0x10d/0x4d0 [ 41.516216] rcu_core+0x8c8/0x2860 [ 41.516668] __do_softirq+0x1b7/0x7d4 [ 41.517152] [ 41.517495] Last potentially related work creation: [ 41.518095] kasan_save_stack+0x22/0x50 [ 41.518627] __kasan_record_aux_stack+0x8e/0xa0 [ 41.519218] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.519869] remove_vma+0x139/0x170 [ 41.520330] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.520904] do_vmi_munmap+0x1f1/0x2b0 [ 41.521410] __vm_munmap+0x138/0x3a0 [ 41.521885] __x64_sys_munmap+0x59/0x80 [ 41.522404] do_syscall_64+0x3f/0x90 [ 41.522883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.523539] [ 41.523759] The buggy address belongs to the object at ffff88800ed4d1d0 [ 41.523759] which belongs to the cache vm_area_struct of size 168 [ 41.525261] The buggy address is located 88 bytes inside of [ 41.525261] freed 168-byte region [ffff88800ed4d1d0, ffff88800ed4d278) [ 41.526713] [ 41.526935] The buggy address belongs to the physical page: [ 41.527609] page:00000000b0e40e65 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed4d [ 41.528715] memcg:ffff88800e719201 [ 41.529158] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.529816] page_type: 0xffffffff() [ 41.530282] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.531236] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e719201 [ 41.532158] page dumped because: kasan: bad access detected [ 41.532837] [ 41.533062] Memory state around the buggy address: [ 41.533647] ffff88800ed4d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.534528] ffff88800ed4d180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.535403] >ffff88800ed4d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.536250] ^ [ 41.536798] ffff88800ed4d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.537650] ffff88800ed4d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.538525] ================================================================== [ 41.539458] Disabling lock debugging due to kernel taint [ 43.573246] BUG: Bad rss-counter state mm:000000003336ff11 type:MM_FILEPAGES val:33 [ 43.574439] BUG: Bad rss-counter state mm:000000003336ff11 type:MM_ANONPAGES val:22 [ 44.075868] BUG: Bad rss-counter state mm:000000008c093873 type:MM_FILEPAGES val:33 [ 44.076873] BUG: Bad rss-counter state mm:000000008c093873 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27934' (ECDSA) to the list of known hosts. 2023/06/19 20:51:53 fuzzer started 2023/06/19 20:51:53 dialing manager at localhost:44161 2023/06/19 20:51:54 checking machine... 2023/06/19 20:51:54 checking revisions... [ 44.847189] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:51:54 testing simple program... [ 44.899633] cgroup: Unknown subsys name 'net' [ 44.955628] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:51:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800dc751c0 RSI=ffffffff818cf5ab RDI=0000000000000005 RBP=ffff8880191e08d0 RSP=ffff88800f6c7d88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffffffff818cf549 R14=0000000040500000 R15=ffff888016827080 RIP=ffffffff818cf5c6 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 00007f01a8e2c900 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=00007ffcc9520a48 CR3=00000000158a8000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880146c1b40 RBX=0000000000000000 RCX=ffffffff810ac4e5 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff8880146c1b40 RBP=ffff8880146c1b40 RSP=ffff88801469fed8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88801469ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180eeb2 RFL=00000002 [-------] 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 00007f99cd0dc900 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=00007f99cc5306f0 CR3=000000000c6b6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=28b69b47030e737800000000000ae988 XMM05=019b3b65283939d000000000001354d0 XMM06=002c85c7fb8818ad0000000000134270 XMM07=fb795ef6d657705600000000001247d8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000