syzkaller login: [ 30.471452] BUG: Bad rss-counter state mm:000000003a31f225 type:MM_FILEPAGES val:33 [ 30.472633] BUG: Bad rss-counter state mm:000000003a31f225 type:MM_ANONPAGES val:22 [ 30.635228] ================================================================== [ 30.636127] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.637205] Read of size 8 at addr ffff88800e451b38 by task sshd/220 [ 30.638126] [ 30.638383] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.639471] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.640610] Call Trace: [ 30.640960] <TASK> [ 30.641273] dump_stack_lvl+0x91/0xf0 [ 30.641795] print_report+0xcc/0x620 [ 30.642310] ? __virt_addr_valid+0x102/0x340 [ 30.642979] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.643775] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.644601] kasan_report+0xbe/0xf0 [ 30.645205] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.645884] vma_interval_tree_remove+0xc75/0xec0 [ 30.646549] vma_prepare+0xc54/0x11a0 [ 30.647082] __split_vma+0x5af/0x950 [ 30.647609] ? __pfx___split_vma+0x10/0x10 [ 30.648190] ? find_held_lock+0x2c/0x110 [ 30.648774] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.649424] ? lock_is_held_type+0x9f/0x120 [ 30.650026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.650697] ? mtree_range_walk+0x632/0x900 [ 30.651304] ? mas_walk+0x5c7/0x7c0 [ 30.651836] do_vmi_munmap+0x1f1/0x2b0 [ 30.652382] mmap_region+0x1f9/0x2660 [ 30.652916] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.653501] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.654309] ? __pfx_lock_acquire+0x10/0x10 [ 30.654917] ? __pfx_mmap_region+0x10/0x10 [ 30.655514] ? security_mmap_addr+0x7d/0xa0 [ 30.656110] ? get_unmapped_area+0x1f5/0x3f0 [ 30.656726] do_mmap+0x854/0xf00 [ 30.657244] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.657796] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.658417] ksys_mmap_pgoff+0x3af/0x500 [ 30.658995] do_syscall_64+0x3f/0x90 [ 30.659521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.660243] RIP: 0033:0x7f1a4f2d6d82 [ 30.660760] 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 [ 30.663163] RSP: 002b:00007ffe9c90b448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.664175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a4f2d6d82 [ 30.665137] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a4e710000 [ 30.666095] RBP: 00007f1a4e710000 R08: 0000000000000009 R09: 0000000000001000 [ 30.667064] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560679308f70 [ 30.668023] R13: 00007ffe9c90b460 R14: 00007ffe9c90b490 R15: 00007ffe9c90b7f0 [ 30.668973] </TASK> [ 30.669328] [ 30.669572] Allocated by task 213: [ 30.670048] kasan_save_stack+0x22/0x50 [ 30.670612] kasan_set_track+0x25/0x30 [ 30.671157] __kasan_slab_alloc+0x59/0x70 [ 30.671753] kmem_cache_alloc+0x16b/0x370 [ 30.672343] vm_area_dup+0x20/0x160 [ 30.672856] __split_vma+0x170/0x950 [ 30.673400] split_vma+0xc6/0x110 [ 30.673888] mprotect_fixup+0x8d2/0xb30 [ 30.674450] do_mprotect_pkey+0x87e/0xd40 [ 30.675038] __x64_sys_mprotect+0x78/0xc0 [ 30.675619] do_syscall_64+0x3f/0x90 [ 30.676162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.676883] [ 30.677276] Freed by task 213: [ 30.677721] kasan_save_stack+0x22/0x50 [ 30.678279] kasan_set_track+0x25/0x30 [ 30.678838] kasan_save_free_info+0x2b/0x50 [ 30.679433] __kasan_slab_free+0x10a/0x190 [ 30.680043] kmem_cache_free+0x10d/0x4d0 [ 30.680614] rcu_core+0x8c8/0x2860 [ 30.681127] __do_softirq+0x1b7/0x7d4 [ 30.681680] [ 30.681930] Last potentially related work creation: [ 30.682608] kasan_save_stack+0x22/0x50 [ 30.683181] __kasan_record_aux_stack+0x8e/0xa0 [ 30.683838] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.684560] remove_vma+0x139/0x170 [ 30.685097] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.685698] do_vmi_munmap+0x1f1/0x2b0 [ 30.686239] __vm_munmap+0x138/0x3a0 [ 30.686758] __x64_sys_munmap+0x59/0x80 [ 30.687305] do_syscall_64+0x3f/0x90 [ 30.687825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.688536] [ 30.688777] The buggy address belongs to the object at ffff88800e451ae0 [ 30.688777] which belongs to the cache vm_area_struct of size 168 [ 30.690392] The buggy address is located 88 bytes inside of [ 30.690392] freed 168-byte region [ffff88800e451ae0, ffff88800e451b88) [ 30.691946] [ 30.692184] The buggy address belongs to the physical page: [ 30.692912] page:00000000985df4f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe451 [ 30.694131] memcg:ffff8880168e0701 [ 30.694617] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.695335] page_type: 0xffffffff() [ 30.695836] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.696870] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168e0701 [ 30.697902] page dumped because: kasan: bad access detected [ 30.698650] [ 30.698899] Memory state around the buggy address: [ 30.699546] ffff88800e451a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.700517] ffff88800e451a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.701502] >ffff88800e451b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.702455] ^ [ 30.703133] ffff88800e451b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.704099] ffff88800e451c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.705077] ================================================================== [ 30.706102] Disabling lock debugging due to kernel taint [ 32.708765] BUG: Bad rss-counter state mm:00000000b93e2b5e type:MM_FILEPAGES val:33 [ 32.709829] BUG: Bad rss-counter state mm:00000000b93e2b5e type:MM_ANONPAGES val:22 [ 33.190739] BUG: Bad rss-counter state mm:000000009b4f2d0e type:MM_FILEPAGES val:33 [ 33.191721] BUG: Bad rss-counter state mm:000000009b4f2d0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49553' (ECDSA) to the list of known hosts. 2023/06/21 06:26:33 fuzzer started 2023/06/21 06:26:33 dialing manager at localhost:36067 2023/06/21 06:26:33 checking machine... 2023/06/21 06:26:33 checking revisions... [ 33.943749] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:26:34 testing simple program... [ 34.002658] cgroup: Unknown subsys name 'net' [ 34.082940] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:26:33 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800e46b2b8 RSP=ffff888010297850 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88800e46b2b8 R14=0000000000000002 R15=ffff88800e46b2ba RIP=ffffffff814c0400 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 00007f9ce2a48900 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=00007fd60bad3650 CR3=0000000013e38000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=1acdefc31d1b6f5f00000000000ae988 XMM05=42cb6516b4e22f450000000000133138 XMM06=5e78666af91769e70000000000131ed8 XMM07=fb795ef6d65770560000000000122128 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888019394468 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff813782f8 RDI=ffff8880087b8500 RBP=ffff88806cf09e58 RSP=ffff88806cf09e30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087b8500 R13=ffff888099394468 R14=ffffffff813782f8 R15=ffff888019394590 RIP=ffffffff81809a2d 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 00007f064b9e1700 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=00007fd60bad5618 CR3=0000000016884000 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=2033333a36323a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a36323a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000