syzkaller login: [ 33.377250] BUG: Bad rss-counter state mm:00000000d6bb169f type:MM_FILEPAGES val:33 [ 33.378458] BUG: Bad rss-counter state mm:00000000d6bb169f type:MM_ANONPAGES val:22 [ 33.528979] ================================================================== [ 33.530071] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.531201] Read of size 8 at addr ffff88800e661c20 by task sshd/220 [ 33.532220] [ 33.532428] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.533242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.534172] Call Trace: [ 33.534475] [ 33.534741] dump_stack_lvl+0x91/0xf0 [ 33.535213] print_report+0xcc/0x620 [ 33.535672] ? __virt_addr_valid+0x102/0x340 [ 33.536248] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.536966] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.537682] kasan_report+0xbe/0xf0 [ 33.538243] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.538979] vma_interval_tree_remove+0xc75/0xec0 [ 33.539679] vma_prepare+0xc54/0x11a0 [ 33.540239] __split_vma+0x5af/0x950 [ 33.540788] ? __pfx___split_vma+0x10/0x10 [ 33.541402] ? find_held_lock+0x2c/0x110 [ 33.542004] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.542658] ? lock_is_held_type+0x9f/0x120 [ 33.543308] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.544013] ? mtree_range_walk+0x632/0x900 [ 33.544653] ? mas_walk+0x5c7/0x7c0 [ 33.545208] do_vmi_munmap+0x1f1/0x2b0 [ 33.545781] mmap_region+0x1f9/0x2660 [ 33.546339] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.546943] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.547775] ? __pfx_lock_acquire+0x10/0x10 [ 33.548394] ? __pfx_mmap_region+0x10/0x10 [ 33.549012] ? security_mmap_addr+0x7d/0xa0 [ 33.549626] ? get_unmapped_area+0x1f5/0x3f0 [ 33.550273] do_mmap+0x854/0xf00 [ 33.550786] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.551392] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.552045] ksys_mmap_pgoff+0x3af/0x500 [ 33.552633] do_syscall_64+0x3f/0x90 [ 33.553189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.553939] RIP: 0033:0x7fa2b7a1dd82 [ 33.554473] 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 [ 33.556976] RSP: 002b:00007ffceab32d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.558027] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2b7a1dd82 [ 33.559018] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2b6e57000 [ 33.560007] RBP: 00007fa2b6e57000 R08: 0000000000000009 R09: 0000000000001000 [ 33.561003] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605ac3d7ec0 [ 33.561996] R13: 00007ffceab32d80 R14: 00007ffceab32db0 R15: 00007ffceab33110 [ 33.563023] [ 33.563365] [ 33.563615] Allocated by task 213: [ 33.564118] kasan_save_stack+0x22/0x50 [ 33.564710] kasan_set_track+0x25/0x30 [ 33.565289] __kasan_slab_alloc+0x59/0x70 [ 33.565901] kmem_cache_alloc+0x16b/0x370 [ 33.566505] vm_area_dup+0x20/0x160 [ 33.567047] __split_vma+0x170/0x950 [ 33.567588] split_vma+0xc6/0x110 [ 33.568100] mprotect_fixup+0x8d2/0xb30 [ 33.568688] do_mprotect_pkey+0x87e/0xd40 [ 33.569295] __x64_sys_mprotect+0x78/0xc0 [ 33.569902] do_syscall_64+0x3f/0x90 [ 33.570460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.571221] [ 33.571469] Freed by task 213: [ 33.571927] kasan_save_stack+0x22/0x50 [ 33.572598] kasan_set_track+0x25/0x30 [ 33.573173] kasan_save_free_info+0x2b/0x50 [ 33.573789] __kasan_slab_free+0x10a/0x190 [ 33.574403] kmem_cache_free+0x10d/0x4d0 [ 33.575001] rcu_core+0x8c8/0x2860 [ 33.575517] __do_softirq+0x1b7/0x7d4 [ 33.576066] [ 33.576315] Last potentially related work creation: [ 33.576996] kasan_save_stack+0x22/0x50 [ 33.577577] __kasan_record_aux_stack+0x8e/0xa0 [ 33.578243] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.578989] remove_vma+0x139/0x170 [ 33.579518] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.580170] do_vmi_munmap+0x1f1/0x2b0 [ 33.580734] __vm_munmap+0x138/0x3a0 [ 33.581277] __x64_sys_munmap+0x59/0x80 [ 33.581856] do_syscall_64+0x3f/0x90 [ 33.582410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.583178] [ 33.583427] Second to last potentially related work creation: [ 33.584228] kasan_save_stack+0x22/0x50 [ 33.584813] __kasan_record_aux_stack+0x8e/0xa0 [ 33.585475] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.586229] remove_vma+0x139/0x170 [ 33.586753] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.587407] do_vmi_munmap+0x1f1/0x2b0 [ 33.587970] mmap_region+0x1f9/0x2660 [ 33.588519] do_mmap+0x854/0xf00 [ 33.589017] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.589580] ksys_mmap_pgoff+0x3af/0x500 [ 33.590164] do_syscall_64+0x3f/0x90 [ 33.590709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.591472] [ 33.591720] The buggy address belongs to the object at ffff88800e661bc8 [ 33.591720] which belongs to the cache vm_area_struct of size 168 [ 33.593436] The buggy address is located 88 bytes inside of [ 33.593436] freed 168-byte region [ffff88800e661bc8, ffff88800e661c70) [ 33.595081] [ 33.595331] The buggy address belongs to the physical page: [ 33.596101] page:00000000d633f6cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe661 [ 33.597359] memcg:ffff88800c997001 [ 33.597855] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.598663] page_type: 0xffffffff() [ 33.599215] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.600294] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c997001 [ 33.601351] page dumped because: kasan: bad access detected [ 33.602123] [ 33.602370] Memory state around the buggy address: [ 33.603057] ffff88800e661b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.604057] ffff88800e661b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.605057] >ffff88800e661c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.606048] ^ [ 33.606668] ffff88800e661c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.607687] ffff88800e661d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.608685] ================================================================== [ 33.609766] Disabling lock debugging due to kernel taint [ 36.412855] BUG: Bad rss-counter state mm:00000000916e39c6 type:MM_FILEPAGES val:33 [ 36.413920] BUG: Bad rss-counter state mm:00000000916e39c6 type:MM_ANONPAGES val:22 [ 36.862827] BUG: Bad rss-counter state mm:00000000cde3753e type:MM_FILEPAGES val:33 [ 36.864069] BUG: Bad rss-counter state mm:00000000cde3753e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3336' (ECDSA) to the list of known hosts. 2023/06/20 02:41:59 fuzzer started 2023/06/20 02:41:59 dialing manager at localhost:44161 2023/06/20 02:41:59 checking machine... 2023/06/20 02:41:59 checking revisions... [ 37.604003] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:41:59 testing simple program... [ 37.653440] cgroup: Unknown subsys name 'net' [ 37.697615] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:41:49 Registers: info registers vcpu 0 RAX=0000000000000018 RBX=ffff88801b9f9630 RCX=0000000000099e80 RDX=0000000000099e40 RSI=0000000000000d40 RDI=0000000000099e40 RBP=ffff88801640fa00 RSP=ffff88801640f9b0 R8 =ffff88801b9f95d8 R9 =0000607f92e024a0 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88800c370140 R13=0000000000000000 R14=0000000000000000 R15=ffffffff81c61c84 RIP=ffffffff81807e4f 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 00007f198ed8b700 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=00007fffc3461a38 CR3=000000000dab0000 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=2038353a31343a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a31343a3230203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=ffff88806cf09bd8 RSI=0000000000000000 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff860d68fa R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff8880145a0000 R15=ffff88800f879ec0 RIP=ffffffff81130340 RFL=00000202 [-------] 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 00007f3ac77d5900 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=00007f3ac7d8c618 CR3=000000000ff94000 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