syzkaller login: [ 30.764331] BUG: Bad rss-counter state mm:0000000044ab0a20 type:MM_FILEPAGES val:33 [ 30.765545] BUG: Bad rss-counter state mm:0000000044ab0a20 type:MM_ANONPAGES val:22 [ 30.805747] ================================================================== [ 30.806979] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.808115] Read of size 8 at addr ffff88800dcd2880 by task sshd/220 [ 30.808959] [ 30.809204] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.810281] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.811278] Call Trace: [ 30.811602] [ 30.811895] dump_stack_lvl+0x91/0xf0 [ 30.812400] print_report+0xcc/0x620 [ 30.812892] ? __virt_addr_valid+0x102/0x340 [ 30.813465] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.814097] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.814732] kasan_report+0xbe/0xf0 [ 30.815218] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.815850] vma_interval_tree_remove+0xc75/0xec0 [ 30.816467] vma_prepare+0xc54/0x11a0 [ 30.816944] __split_vma+0x5af/0x950 [ 30.817445] ? __pfx___split_vma+0x10/0x10 [ 30.817987] ? find_held_lock+0x2c/0x110 [ 30.818515] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.819079] ? lock_is_held_type+0x9f/0x120 [ 30.819634] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.820249] ? mtree_range_walk+0x632/0x900 [ 30.820820] ? mas_walk+0x5c7/0x7c0 [ 30.821305] do_vmi_munmap+0x1f1/0x2b0 [ 30.821816] mmap_region+0x1f9/0x2660 [ 30.822308] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.822822] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.823539] ? __pfx_lock_acquire+0x10/0x10 [ 30.824083] ? __pfx_mmap_region+0x10/0x10 [ 30.824621] ? security_mmap_addr+0x7d/0xa0 [ 30.825157] ? get_unmapped_area+0x1f5/0x3f0 [ 30.825719] do_mmap+0x854/0xf00 [ 30.826171] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.826682] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.827249] ksys_mmap_pgoff+0x3af/0x500 [ 30.827760] do_syscall_64+0x3f/0x90 [ 30.828245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.828891] RIP: 0033:0x7f913cf30d82 [ 30.829372] 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 [ 30.831517] RSP: 002b:00007fff3f69fde8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.832434] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f913cf30d82 [ 30.833282] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f913c36a000 [ 30.834137] RBP: 00007f913c36a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.834980] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9f88bbf70 [ 30.835831] R13: 00007fff3f69fe00 R14: 00007fff3f69fe30 R15: 00007fff3f6a0190 [ 30.836691] [ 30.836989] [ 30.837207] Allocated by task 213: [ 30.837669] kasan_save_stack+0x22/0x50 [ 30.838180] kasan_set_track+0x25/0x30 [ 30.838678] __kasan_slab_alloc+0x59/0x70 [ 30.839217] kmem_cache_alloc+0x16b/0x370 [ 30.839741] vm_area_dup+0x20/0x160 [ 30.840203] __split_vma+0x170/0x950 [ 30.840686] split_vma+0xc6/0x110 [ 30.841138] mprotect_fixup+0x8d2/0xb30 [ 30.841653] do_mprotect_pkey+0x87e/0xd40 [ 30.842174] __x64_sys_mprotect+0x78/0xc0 [ 30.842712] do_syscall_64+0x3f/0x90 [ 30.843190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.843847] [ 30.844061] Freed by task 213: [ 30.844455] kasan_save_stack+0x22/0x50 [ 30.844963] kasan_set_track+0x25/0x30 [ 30.845480] kasan_save_free_info+0x2b/0x50 [ 30.846029] __kasan_slab_free+0x10a/0x190 [ 30.846660] kmem_cache_free+0x10d/0x4d0 [ 30.847173] rcu_core+0x8c8/0x2860 [ 30.847617] __do_softirq+0x1b7/0x7d4 [ 30.848099] [ 30.848324] Last potentially related work creation: [ 30.848908] kasan_save_stack+0x22/0x50 [ 30.849431] __kasan_record_aux_stack+0x8e/0xa0 [ 30.850016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.850657] remove_vma+0x139/0x170 [ 30.851109] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.851679] do_vmi_munmap+0x1f1/0x2b0 [ 30.852164] __vm_munmap+0x138/0x3a0 [ 30.852631] __x64_sys_munmap+0x59/0x80 [ 30.853134] do_syscall_64+0x3f/0x90 [ 30.853622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.854268] [ 30.854486] The buggy address belongs to the object at ffff88800dcd2828 [ 30.854486] which belongs to the cache vm_area_struct of size 168 [ 30.855962] The buggy address is located 88 bytes inside of [ 30.855962] freed 168-byte region [ffff88800dcd2828, ffff88800dcd28d0) [ 30.857396] [ 30.857614] The buggy address belongs to the physical page: [ 30.858283] page:00000000bd277131 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcd2 [ 30.859366] memcg:ffff88800c54a201 [ 30.859794] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.860448] page_type: 0xffffffff() [ 30.860900] raw: 0100000000000200 ffff8880087a0c80 ffffea000036cc00 dead000000000002 [ 30.861833] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c54a201 [ 30.862743] page dumped because: kasan: bad access detected [ 30.863407] [ 30.863625] Memory state around the buggy address: [ 30.864202] ffff88800dcd2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.865096] ffff88800dcd2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.865988] >ffff88800dcd2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.866857] ^ [ 30.867274] ffff88800dcd2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.868143] ffff88800dcd2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.869023] ================================================================== [ 30.870023] Disabling lock debugging due to kernel taint [ 33.555119] BUG: Bad rss-counter state mm:00000000c7efc7d9 type:MM_FILEPAGES val:33 [ 33.556108] BUG: Bad rss-counter state mm:00000000c7efc7d9 type:MM_ANONPAGES val:22 [ 34.049390] BUG: Bad rss-counter state mm:000000000371e7f9 type:MM_FILEPAGES val:33 [ 34.050549] BUG: Bad rss-counter state mm:000000000371e7f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53752' (ECDSA) to the list of known hosts. 2023/06/20 23:27:23 fuzzer started 2023/06/20 23:27:23 dialing manager at localhost:36067 2023/06/20 23:27:23 checking machine... 2023/06/20 23:27:23 checking revisions... [ 34.750409] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:27:24 testing simple program... [ 34.804385] cgroup: Unknown subsys name 'net' [ 34.876124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:27:23 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fffaec93458 CR3=000000000960a000 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=2033323a37323a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a37323a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff88806cf09dc8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800e7d6b40 R13=ffff88800e7d6af0 R14=ffffffff813782f8 R15=ffff888009683200 RIP=ffffffff8135b960 RFL=00000016 [----AP-] 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 00007f88d1ee5900 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=00007f88d249c618 CR3=000000000dca6000 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