syzkaller login: [ 39.675039] BUG: Bad rss-counter state mm:00000000795dec31 type:MM_FILEPAGES val:33 [ 39.676241] BUG: Bad rss-counter state mm:00000000795dec31 type:MM_ANONPAGES val:22 [ 39.746518] ================================================================== [ 39.747423] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.748361] Read of size 8 at addr ffff88800f1efc20 by task sshd/219 [ 39.749131] [ 39.749347] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.750452] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.751417] Call Trace: [ 39.751734] [ 39.752051] dump_stack_lvl+0x91/0xf0 [ 39.752550] print_report+0xcc/0x620 [ 39.753037] ? __virt_addr_valid+0x102/0x340 [ 39.753591] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.754216] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.754837] kasan_report+0xbe/0xf0 [ 39.755315] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.755936] vma_interval_tree_remove+0xc75/0xec0 [ 39.756530] vma_prepare+0xc54/0x11a0 [ 39.757005] __split_vma+0x5af/0x950 [ 39.757476] ? __pfx___split_vma+0x10/0x10 [ 39.758020] ? find_held_lock+0x2c/0x110 [ 39.758544] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.759119] ? lock_is_held_type+0x9f/0x120 [ 39.759649] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.760251] ? mtree_range_walk+0x632/0x900 [ 39.760792] ? mas_walk+0x5c7/0x7c0 [ 39.761257] do_vmi_munmap+0x1f1/0x2b0 [ 39.761743] mmap_region+0x1f9/0x2660 [ 39.762237] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.762745] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.763450] ? __pfx_lock_acquire+0x10/0x10 [ 39.763976] ? __pfx_mmap_region+0x10/0x10 [ 39.764508] ? security_mmap_addr+0x7d/0xa0 [ 39.765031] ? get_unmapped_area+0x1f5/0x3f0 [ 39.765577] do_mmap+0x854/0xf00 [ 39.766029] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.766522] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.767089] ksys_mmap_pgoff+0x3af/0x500 [ 39.767594] do_syscall_64+0x3f/0x90 [ 39.768072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.768710] RIP: 0033:0x7f400cb30d82 [ 39.769169] 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 [ 39.771270] RSP: 002b:00007ffc8a6efc18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.772160] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f400cb30d82 [ 39.773005] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f400bf6a000 [ 39.773840] RBP: 00007f400bf6a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.774702] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb6bb4eec0 [ 39.775535] R13: 00007ffc8a6efc30 R14: 00007ffc8a6efc60 R15: 00007ffc8a6effc0 [ 39.776380] [ 39.776669] [ 39.776882] Allocated by task 212: [ 39.777311] kasan_save_stack+0x22/0x50 [ 39.777810] kasan_set_track+0x25/0x30 [ 39.778315] __kasan_slab_alloc+0x59/0x70 [ 39.778838] kmem_cache_alloc+0x16b/0x370 [ 39.779356] vm_area_dup+0x20/0x160 [ 39.779804] __split_vma+0x170/0x950 [ 39.780271] split_vma+0xc6/0x110 [ 39.780703] mprotect_fixup+0x8d2/0xb30 [ 39.781203] do_mprotect_pkey+0x87e/0xd40 [ 39.781722] __x64_sys_mprotect+0x78/0xc0 [ 39.782254] do_syscall_64+0x3f/0x90 [ 39.782724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.783367] [ 39.783582] Freed by task 203: [ 39.783971] kasan_save_stack+0x22/0x50 [ 39.784475] kasan_set_track+0x25/0x30 [ 39.784962] kasan_save_free_info+0x2b/0x50 [ 39.785487] __kasan_slab_free+0x10a/0x190 [ 39.786022] kmem_cache_free+0x10d/0x4d0 [ 39.786539] rcu_core+0x8c8/0x2860 [ 39.786982] __do_softirq+0x1b7/0x7d4 [ 39.787455] [ 39.787670] Last potentially related work creation: [ 39.788246] kasan_save_stack+0x22/0x50 [ 39.788746] __kasan_record_aux_stack+0x8e/0xa0 [ 39.789319] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.789966] remove_vma+0x139/0x170 [ 39.790423] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.790985] do_vmi_munmap+0x1f1/0x2b0 [ 39.791482] __vm_munmap+0x138/0x3a0 [ 39.791947] __x64_sys_munmap+0x59/0x80 [ 39.792448] do_syscall_64+0x3f/0x90 [ 39.792918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.793554] [ 39.793779] The buggy address belongs to the object at ffff88800f1efbc8 [ 39.793779] which belongs to the cache vm_area_struct of size 168 [ 39.795261] The buggy address is located 88 bytes inside of [ 39.795261] freed 168-byte region [ffff88800f1efbc8, ffff88800f1efc70) [ 39.796699] [ 39.796917] The buggy address belongs to the physical page: [ 39.797577] page:00000000408399b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1ef [ 39.798730] memcg:ffff888013b5d001 [ 39.799175] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.799851] page_type: 0xffffffff() [ 39.800318] raw: 0100000000000200 ffff88800879fc80 ffffea00003d6f00 dead000000000002 [ 39.801289] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013b5d001 [ 39.802253] page dumped because: kasan: bad access detected [ 39.802950] [ 39.803176] Memory state around the buggy address: [ 39.803793] ffff88800f1efb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.804709] ffff88800f1efb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.805622] >ffff88800f1efc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.806547] ^ [ 39.807103] ffff88800f1efc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.808001] ffff88800f1efd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.808881] ================================================================== [ 39.810231] Disabling lock debugging due to kernel taint [ 42.660882] BUG: Bad rss-counter state mm:00000000e701af6a type:MM_FILEPAGES val:33 [ 42.662095] BUG: Bad rss-counter state mm:00000000e701af6a type:MM_ANONPAGES val:22 [ 43.034543] BUG: Bad rss-counter state mm:00000000054782d8 type:MM_FILEPAGES val:33 [ 43.036073] BUG: Bad rss-counter state mm:00000000054782d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18064' (ECDSA) to the list of known hosts. 2023/06/19 14:15:09 fuzzer started 2023/06/19 14:15:10 dialing manager at localhost:44161 2023/06/19 14:15:10 checking machine... 2023/06/19 14:15:10 checking revisions... [ 43.861419] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:15:10 testing simple program... [ 43.914851] cgroup: Unknown subsys name 'net' [ 43.981871] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:15:08 Registers: info registers vcpu 0 RAX=00005637b07cc230 RBX=00005637b07c99c0 RCX=0000000000000011 RDX=0000000000000001 RSI=66f3bfc445aa0000 RDI=0000000000000168 RBP=000000000000002d RSP=00007ffc85ca2dd0 R8 =000000000000002d R9 =000000000000002f R10=ffffffffffffffff R11=00005637b07cb530 R12=00005637b07c9a50 R13=00005637b07cb180 R14=0000000000000000 R15=00005637b07c99d8 RIP=00007eff416c7881 RFL=00000246 [---Z-P-] 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 00007eff40e84900 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=00005637b07d2318 CR3=000000001ca48000 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=98e7351bdca5070efc763c9c7ae5872d XMM01=06094547655e1428bb240147b776f934 XMM02=48f98dbe44a0b2fad71237459699a07d XMM03=dcc856c9841789793a9208b9ecd5a3fc XMM04=a6c78c7254fd056314ee1762131595c5 XMM05=629177b13f8eb0ecea1ea7fcf6df0baa XMM06=e85c7040c6b6a80791bac5170988f013 XMM07=50494a1373de0994dcc856c984178979 XMM08=107ffc7a7c5c53a748f98dbe44a0b2fa XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=ffff88806cf09e08 RCX=ffffffff86137d01 RDX=ffff88806cf09e10 RSI=0000000000000000 RDI=ffff88806cf09aa8 RBP=ffff88806cf02000 RSP=ffff88806cf09a28 R8 =ffffffff86137dd6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e08 R15=ffff88806cf09a98 RIP=ffffffff8113128d 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 00007f568287b900 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=00007f0fc7ebc000 CR3=000000000cbd6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000