syzkaller login: [ 56.502385] BUG: Bad rss-counter state mm:00000000b2ce1c6f type:MM_FILEPAGES val:33 [ 56.503626] BUG: Bad rss-counter state mm:00000000b2ce1c6f type:MM_ANONPAGES val:22 [ 56.543265] ================================================================== [ 56.544385] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.545464] Read of size 8 at addr ffff88800e2086b0 by task sshd/221 [ 56.546271] [ 56.546494] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.547435] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.548492] Call Trace: [ 56.548829] [ 56.549126] dump_stack_lvl+0x91/0xf0 [ 56.549639] print_report+0xcc/0x620 [ 56.550148] ? __virt_addr_valid+0x102/0x340 [ 56.550730] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.551384] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.552059] kasan_report+0xbe/0xf0 [ 56.552558] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.553210] vma_interval_tree_remove+0xc75/0xec0 [ 56.553834] vma_prepare+0xc54/0x11a0 [ 56.554346] __split_vma+0x5af/0x950 [ 56.554848] ? __pfx___split_vma+0x10/0x10 [ 56.555409] ? find_held_lock+0x2c/0x110 [ 56.555979] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.556577] ? lock_is_held_type+0x9f/0x120 [ 56.557142] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.557779] ? mtree_range_walk+0x632/0x900 [ 56.558358] ? mas_walk+0x5c7/0x7c0 [ 56.558862] do_vmi_munmap+0x1f1/0x2b0 [ 56.559384] mmap_region+0x1f9/0x2660 [ 56.559882] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.560434] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.561184] ? __pfx_lock_acquire+0x10/0x10 [ 56.561755] ? __pfx_mmap_region+0x10/0x10 [ 56.562313] ? security_mmap_addr+0x7d/0xa0 [ 56.562882] ? get_unmapped_area+0x1f5/0x3f0 [ 56.563466] do_mmap+0x854/0xf00 [ 56.563920] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.564447] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.565037] ksys_mmap_pgoff+0x3af/0x500 [ 56.565577] do_syscall_64+0x3f/0x90 [ 56.566082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.566771] RIP: 0033:0x7f97e9727d82 [ 56.567254] 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 [ 56.569564] RSP: 002b:00007ffd8ea19e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.570538] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f97e9727d82 [ 56.571431] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f97e8b61000 [ 56.572328] RBP: 00007f97e8b61000 R08: 0000000000000009 R09: 0000000000001000 [ 56.573233] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614646faec0 [ 56.574148] R13: 00007ffd8ea19e40 R14: 00007ffd8ea19e70 R15: 00007ffd8ea1a1d0 [ 56.575065] [ 56.575372] [ 56.575602] Allocated by task 214: [ 56.576064] kasan_save_stack+0x22/0x50 [ 56.576591] kasan_set_track+0x25/0x30 [ 56.577106] __kasan_slab_alloc+0x59/0x70 [ 56.577655] kmem_cache_alloc+0x16b/0x370 [ 56.578195] vm_area_dup+0x20/0x160 [ 56.578678] __split_vma+0x170/0x950 [ 56.579167] split_vma+0xc6/0x110 [ 56.579633] mprotect_fixup+0x8d2/0xb30 [ 56.580174] do_mprotect_pkey+0x87e/0xd40 [ 56.580743] __x64_sys_mprotect+0x78/0xc0 [ 56.581312] do_syscall_64+0x3f/0x90 [ 56.581817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.582503] [ 56.582722] Freed by task 214: [ 56.583140] kasan_save_stack+0x22/0x50 [ 56.583673] kasan_set_track+0x25/0x30 [ 56.584202] kasan_save_free_info+0x2b/0x50 [ 56.584759] __kasan_slab_free+0x10a/0x190 [ 56.585322] kmem_cache_free+0x10d/0x4d0 [ 56.585853] rcu_core+0x8c8/0x2860 [ 56.586320] __do_softirq+0x1b7/0x7d4 [ 56.586827] [ 56.587052] Last potentially related work creation: [ 56.587678] kasan_save_stack+0x22/0x50 [ 56.588221] __kasan_record_aux_stack+0x8e/0xa0 [ 56.588832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.589533] remove_vma+0x139/0x170 [ 56.590020] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.590611] do_vmi_munmap+0x1f1/0x2b0 [ 56.591116] __vm_munmap+0x138/0x3a0 [ 56.591601] __x64_sys_munmap+0x59/0x80 [ 56.592116] do_syscall_64+0x3f/0x90 [ 56.592587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.593235] [ 56.593450] The buggy address belongs to the object at ffff88800e208658 [ 56.593450] which belongs to the cache vm_area_struct of size 168 [ 56.594931] The buggy address is located 88 bytes inside of [ 56.594931] freed 168-byte region [ffff88800e208658, ffff88800e208700) [ 56.596342] [ 56.596563] The buggy address belongs to the physical page: [ 56.597228] page:000000005654c280 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe208 [ 56.598333] memcg:ffff88800bbf8801 [ 56.598756] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.599418] page_type: 0xffffffff() [ 56.599874] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 56.600824] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bbf8801 [ 56.601732] page dumped because: kasan: bad access detected [ 56.602398] [ 56.602613] Memory state around the buggy address: [ 56.603195] ffff88800e208580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.604071] ffff88800e208600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 56.604923] >ffff88800e208680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.605778] ^ [ 56.606359] ffff88800e208700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 56.607220] ffff88800e208780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 56.608090] ================================================================== [ 56.609151] Disabling lock debugging due to kernel taint [ 59.146508] BUG: Bad rss-counter state mm:000000008d5811dd type:MM_FILEPAGES val:33 [ 59.147587] BUG: Bad rss-counter state mm:000000008d5811dd type:MM_ANONPAGES val:22 [ 59.736912] BUG: Bad rss-counter state mm:0000000028010b12 type:MM_FILEPAGES val:33 [ 59.738091] BUG: Bad rss-counter state mm:0000000028010b12 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59564' (ECDSA) to the list of known hosts. 2023/06/20 05:45:32 fuzzer started 2023/06/20 05:45:33 dialing manager at localhost:44161 2023/06/20 05:45:33 checking machine... 2023/06/20 05:45:33 checking revisions... [ 60.389951] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:45:33 testing simple program... [ 60.428913] cgroup: Unknown subsys name 'net' [ 60.481220] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:45:07 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=00007fff67b98838 CR3=0000000016640000 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=2032333a35343a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a35343a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8613753e RDX=1ffff1100d9e135f RSI=1ffff1100d9e135e RDI=1ffff1100d9e135e RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86137542 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09df8 R15=ffff88806cf09a98 RIP=ffffffff811310ce 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 00007f70d0ea0900 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=00007f70d1457618 CR3=00000000097d8000 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