syzkaller login: [ 52.600666] BUG: Bad rss-counter state mm:0000000000178d1f type:MM_FILEPAGES val:33 [ 52.602500] BUG: Bad rss-counter state mm:0000000000178d1f type:MM_ANONPAGES val:22 [ 52.764565] ================================================================== [ 52.765482] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.766424] Read of size 8 at addr ffff88800d8c16b0 by task sshd/219 [ 52.767343] [ 52.767567] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.768451] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.769465] Call Trace: [ 52.769790] [ 52.770079] dump_stack_lvl+0x91/0xf0 [ 52.770579] print_report+0xcc/0x620 [ 52.771072] ? __virt_addr_valid+0x102/0x340 [ 52.771640] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.772290] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.772916] kasan_report+0xbe/0xf0 [ 52.773400] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.774013] vma_interval_tree_remove+0xc75/0xec0 [ 52.774616] vma_prepare+0xc54/0x11a0 [ 52.775097] __split_vma+0x5af/0x950 [ 52.775565] ? __pfx___split_vma+0x10/0x10 [ 52.776101] ? find_held_lock+0x2c/0x110 [ 52.776621] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.777183] ? lock_is_held_type+0x9f/0x120 [ 52.777718] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.778326] ? mtree_range_walk+0x632/0x900 [ 52.778877] ? mas_walk+0x5c7/0x7c0 [ 52.779345] do_vmi_munmap+0x1f1/0x2b0 [ 52.779846] mmap_region+0x1f9/0x2660 [ 52.780330] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.780846] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.781562] ? __pfx_lock_acquire+0x10/0x10 [ 52.782108] ? __pfx_mmap_region+0x10/0x10 [ 52.782648] ? security_mmap_addr+0x7d/0xa0 [ 52.783177] ? get_unmapped_area+0x1f5/0x3f0 [ 52.783730] do_mmap+0x854/0xf00 [ 52.784194] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.784702] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.785288] ksys_mmap_pgoff+0x3af/0x500 [ 52.785800] do_syscall_64+0x3f/0x90 [ 52.786285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.786946] RIP: 0033:0x7f9fa525dd82 [ 52.787405] 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 [ 52.789576] RSP: 002b:00007ffcda591048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.790500] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fa525dd82 [ 52.791365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9fa4697000 [ 52.792229] RBP: 00007f9fa4697000 R08: 0000000000000009 R09: 0000000000001000 [ 52.793081] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a7ee70ec0 [ 52.793937] R13: 00007ffcda591060 R14: 00007ffcda591090 R15: 00007ffcda5913f0 [ 52.794799] [ 52.795091] [ 52.795310] Allocated by task 212: [ 52.795765] kasan_save_stack+0x22/0x50 [ 52.796278] kasan_set_track+0x25/0x30 [ 52.796779] __kasan_slab_alloc+0x59/0x70 [ 52.797310] kmem_cache_alloc+0x16b/0x370 [ 52.797829] vm_area_dup+0x20/0x160 [ 52.798295] __split_vma+0x170/0x950 [ 52.798765] split_vma+0xc6/0x110 [ 52.799205] mprotect_fixup+0x8d2/0xb30 [ 52.799714] do_mprotect_pkey+0x87e/0xd40 [ 52.800247] __x64_sys_mprotect+0x78/0xc0 [ 52.800772] do_syscall_64+0x3f/0x90 [ 52.801245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.801889] [ 52.802105] Freed by task 203: [ 52.802492] kasan_save_stack+0x22/0x50 [ 52.803001] kasan_set_track+0x25/0x30 [ 52.803500] kasan_save_free_info+0x2b/0x50 [ 52.804037] __kasan_slab_free+0x10a/0x190 [ 52.804568] kmem_cache_free+0x10d/0x4d0 [ 52.805075] rcu_core+0x8c8/0x2860 [ 52.805521] __do_softirq+0x1b7/0x7d4 [ 52.805999] [ 52.806216] Last potentially related work creation: [ 52.806799] kasan_save_stack+0x22/0x50 [ 52.807297] __kasan_record_aux_stack+0x8e/0xa0 [ 52.807991] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.808634] remove_vma+0x139/0x170 [ 52.809086] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.809648] do_vmi_munmap+0x1f1/0x2b0 [ 52.810162] __vm_munmap+0x138/0x3a0 [ 52.810630] __x64_sys_munmap+0x59/0x80 [ 52.811138] do_syscall_64+0x3f/0x90 [ 52.811612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.812260] [ 52.812478] The buggy address belongs to the object at ffff88800d8c1658 [ 52.812478] which belongs to the cache vm_area_struct of size 168 [ 52.813938] The buggy address is located 88 bytes inside of [ 52.813938] freed 168-byte region [ffff88800d8c1658, ffff88800d8c1700) [ 52.815324] [ 52.815542] The buggy address belongs to the physical page: [ 52.816215] page:000000000f9c57bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8c1 [ 52.817297] memcg:ffff88800e26f201 [ 52.817732] flags: 0x100000000000200(slab|node=0|zone=1) [ 52.818379] page_type: 0xffffffff() [ 52.818827] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 52.819739] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e26f201 [ 52.820649] page dumped because: kasan: bad access detected [ 52.821310] [ 52.821527] Memory state around the buggy address: [ 52.822103] ffff88800d8c1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 52.822955] ffff88800d8c1600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 52.823831] >ffff88800d8c1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.824681] ^ [ 52.825261] ffff88800d8c1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 52.826113] ffff88800d8c1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 52.826961] ================================================================== [ 52.828007] Disabling lock debugging due to kernel taint [ 54.956331] BUG: Bad rss-counter state mm:000000005e21e5ea type:MM_FILEPAGES val:33 [ 54.957343] BUG: Bad rss-counter state mm:000000005e21e5ea type:MM_ANONPAGES val:22 [ 55.530743] BUG: Bad rss-counter state mm:0000000089092567 type:MM_FILEPAGES val:33 [ 55.531930] BUG: Bad rss-counter state mm:0000000089092567 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45619' (ECDSA) to the list of known hosts. 2023/06/19 23:50:57 fuzzer started 2023/06/19 23:50:58 dialing manager at localhost:44161 2023/06/19 23:50:58 checking machine... 2023/06/19 23:50:58 checking revisions... [ 56.161213] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:50:58 testing simple program... [ 56.201694] cgroup: Unknown subsys name 'net' [ 56.241034] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:50:34 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f2399d98650 CR3=000000000c61c000 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=2037353a30353a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a30353a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff8880168ff488 RDI=ffffffff813ad6d0 RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888015d98000 R15=ffff88800d945900 RIP=ffffffff811303b2 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 00007f23997e3900 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=00007f2399d9a618 CR3=000000000d4d6000 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