syzkaller login: [ 30.557189] BUG: Bad rss-counter state mm:00000000b1ad5a19 type:MM_FILEPAGES val:33 [ 30.558907] BUG: Bad rss-counter state mm:00000000b1ad5a19 type:MM_ANONPAGES val:22 [ 30.721279] ================================================================== [ 30.722201] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.723142] Read of size 8 at addr ffff88800e052b38 by task sshd/220 [ 30.723929] [ 30.724257] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.725114] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.726100] Call Trace: [ 30.726450] [ 30.726736] dump_stack_lvl+0x91/0xf0 [ 30.727229] print_report+0xcc/0x620 [ 30.727727] ? __virt_addr_valid+0x102/0x340 [ 30.728278] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.728904] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.729524] kasan_report+0xbe/0xf0 [ 30.730011] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.730631] vma_interval_tree_remove+0xc75/0xec0 [ 30.731236] vma_prepare+0xc54/0x11a0 [ 30.731721] __split_vma+0x5af/0x950 [ 30.732195] ? __pfx___split_vma+0x10/0x10 [ 30.732727] ? find_held_lock+0x2c/0x110 [ 30.733253] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.733822] ? lock_is_held_type+0x9f/0x120 [ 30.734366] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.734976] ? mtree_range_walk+0x632/0x900 [ 30.735556] ? mas_walk+0x5c7/0x7c0 [ 30.736035] do_vmi_munmap+0x1f1/0x2b0 [ 30.736531] mmap_region+0x1f9/0x2660 [ 30.737014] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.737533] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.738253] ? __pfx_lock_acquire+0x10/0x10 [ 30.738790] ? __pfx_mmap_region+0x10/0x10 [ 30.739325] ? security_mmap_addr+0x7d/0xa0 [ 30.739866] ? get_unmapped_area+0x1f5/0x3f0 [ 30.740423] do_mmap+0x854/0xf00 [ 30.740865] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.741370] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.741939] ksys_mmap_pgoff+0x3af/0x500 [ 30.742452] do_syscall_64+0x3f/0x90 [ 30.742938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.743599] RIP: 0033:0x7fe5eae6dd82 [ 30.744061] 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 [ 30.746184] RSP: 002b:00007ffe26aa30d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.747089] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5eae6dd82 [ 30.747953] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5ea2a7000 [ 30.748794] RBP: 00007fe5ea2a7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.749638] R10: 0000000000000812 R11: 0000000000000206 R12: 000055977c33bec0 [ 30.750481] R13: 00007ffe26aa30f0 R14: 00007ffe26aa3120 R15: 00007ffe26aa3480 [ 30.751340] [ 30.751634] [ 30.751851] Allocated by task 213: [ 30.752289] kasan_save_stack+0x22/0x50 [ 30.752799] kasan_set_track+0x25/0x30 [ 30.753293] __kasan_slab_alloc+0x59/0x70 [ 30.753819] kmem_cache_alloc+0x16b/0x370 [ 30.754337] vm_area_dup+0x20/0x160 [ 30.754798] __split_vma+0x170/0x950 [ 30.755257] split_vma+0xc6/0x110 [ 30.755699] mprotect_fixup+0x8d2/0xb30 [ 30.756203] do_mprotect_pkey+0x87e/0xd40 [ 30.756722] __x64_sys_mprotect+0x78/0xc0 [ 30.757244] do_syscall_64+0x3f/0x90 [ 30.757728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.758374] [ 30.758595] Freed by task 213: [ 30.758992] kasan_save_stack+0x22/0x50 [ 30.759516] kasan_set_track+0x25/0x30 [ 30.760010] kasan_save_free_info+0x2b/0x50 [ 30.760543] __kasan_slab_free+0x10a/0x190 [ 30.761074] kmem_cache_free+0x10d/0x4d0 [ 30.761576] rcu_core+0x8c8/0x2860 [ 30.762019] __do_softirq+0x1b7/0x7d4 [ 30.762499] [ 30.762717] Last potentially related work creation: [ 30.763304] kasan_save_stack+0x22/0x50 [ 30.763816] __kasan_record_aux_stack+0x8e/0xa0 [ 30.764393] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.765035] remove_vma+0x139/0x170 [ 30.765489] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.766047] do_vmi_munmap+0x1f1/0x2b0 [ 30.766537] __vm_munmap+0x138/0x3a0 [ 30.767016] __x64_sys_munmap+0x59/0x80 [ 30.767530] do_syscall_64+0x3f/0x90 [ 30.768009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.768654] [ 30.768866] Second to last potentially related work creation: [ 30.769561] kasan_save_stack+0x22/0x50 [ 30.770065] __kasan_record_aux_stack+0x8e/0xa0 [ 30.770638] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.771285] remove_vma+0x139/0x170 [ 30.771746] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.772307] do_vmi_munmap+0x1f1/0x2b0 [ 30.772800] mmap_region+0x1f9/0x2660 [ 30.773278] do_mmap+0x854/0xf00 [ 30.773715] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.774210] ksys_mmap_pgoff+0x3af/0x500 [ 30.774716] do_syscall_64+0x3f/0x90 [ 30.775197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775862] [ 30.776082] The buggy address belongs to the object at ffff88800e052ae0 [ 30.776082] which belongs to the cache vm_area_struct of size 168 [ 30.777549] The buggy address is located 88 bytes inside of [ 30.777549] freed 168-byte region [ffff88800e052ae0, ffff88800e052b88) [ 30.778950] [ 30.779171] The buggy address belongs to the physical page: [ 30.779838] page:000000008a6f2f4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe052 [ 30.780915] memcg:ffff88800ebcef01 [ 30.781349] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.782048] page_type: 0xffffffff() [ 30.782503] raw: 0100000000000200 ffff8880087a0c80 ffffea0000252b00 dead000000000005 [ 30.783440] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebcef01 [ 30.784355] page dumped because: kasan: bad access detected [ 30.785018] [ 30.785239] Memory state around the buggy address: [ 30.785821] ffff88800e052a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.786693] ffff88800e052a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.787555] >ffff88800e052b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.788412] ^ [ 30.789024] ffff88800e052b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.789896] ffff88800e052c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.790768] ================================================================== [ 30.791758] Disabling lock debugging due to kernel taint [ 32.663220] BUG: Bad rss-counter state mm:0000000075bdc4c2 type:MM_FILEPAGES val:33 [ 32.664451] BUG: Bad rss-counter state mm:0000000075bdc4c2 type:MM_ANONPAGES val:22 [ 33.127260] BUG: Bad rss-counter state mm:000000000433ec63 type:MM_FILEPAGES val:33 [ 33.128440] BUG: Bad rss-counter state mm:000000000433ec63 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34108' (ECDSA) to the list of known hosts. 2023/06/20 23:24:32 fuzzer started 2023/06/20 23:24:33 dialing manager at localhost:36067 2023/06/20 23:24:33 checking machine... 2023/06/20 23:24:33 checking revisions... [ 33.840636] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:24:33 testing simple program... [ 33.883100] cgroup: Unknown subsys name 'net' [ 33.940651] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:24:32 Registers: info registers vcpu 0 RAX=00007fffcf0fb040 RBX=00005594a36ef3f0 RCX=00007fffcf0fb070 RDX=0000000000000030 RSI=00007f24a1e937b4 RDI=00005594a36ef3f0 RBP=00007fffcf0fb290 RSP=00007fffcf0fb040 R8 =0000000000000001 R9 =00007f24a1e93860 R10=00007fffcf0fa204 R11=0000000000000206 R12=0000000000000000 R13=00007fffcf0fb880 R14=00005594a36ef3f0 R15=00007fffcf0fb420 RIP=00007f24a1df2d7a 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 00007f24a1918900 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=00007f24a1ecf618 CR3=000000001a1ae000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ff896732720 CR3=000000000e866000 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=2032333a34323a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a34323a3332203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000