syzkaller login: [ 30.992556] BUG: Bad rss-counter state mm:00000000f9593546 type:MM_FILEPAGES val:33 [ 30.993571] BUG: Bad rss-counter state mm:00000000f9593546 type:MM_ANONPAGES val:22 [ 31.161224] ================================================================== [ 31.162499] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.163692] Read of size 8 at addr ffff88800f033d08 by task sshd/220 [ 31.164667] [ 31.164951] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.166062] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.167287] Call Trace: [ 31.167699] [ 31.168072] dump_stack_lvl+0x91/0xf0 [ 31.168707] print_report+0xcc/0x620 [ 31.169328] ? __virt_addr_valid+0x102/0x340 [ 31.170051] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.170852] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.171664] kasan_report+0xbe/0xf0 [ 31.172288] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.173099] vma_interval_tree_remove+0xc75/0xec0 [ 31.173892] vma_prepare+0xc54/0x11a0 [ 31.174552] __split_vma+0x5af/0x950 [ 31.175178] ? __pfx___split_vma+0x10/0x10 [ 31.175870] ? find_held_lock+0x2c/0x110 [ 31.176536] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.177237] ? lock_is_held_type+0x9f/0x120 [ 31.177934] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.178784] ? mtree_range_walk+0x632/0x900 [ 31.179550] ? mas_walk+0x5c7/0x7c0 [ 31.180219] do_vmi_munmap+0x1f1/0x2b0 [ 31.180882] mmap_region+0x1f9/0x2660 [ 31.181545] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.182201] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.182925] ? __pfx_lock_acquire+0x10/0x10 [ 31.183455] ? __pfx_mmap_region+0x10/0x10 [ 31.183989] ? security_mmap_addr+0x7d/0xa0 [ 31.184519] ? get_unmapped_area+0x1f5/0x3f0 [ 31.185073] do_mmap+0x854/0xf00 [ 31.185515] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.186035] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.186597] ksys_mmap_pgoff+0x3af/0x500 [ 31.187105] do_syscall_64+0x3f/0x90 [ 31.187585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.188234] RIP: 0033:0x7fe3d6b2fd82 [ 31.188691] 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 [ 31.190833] RSP: 002b:00007ffc962a07d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.191737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe3d6b2fd82 [ 31.192581] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3d5f69000 [ 31.193421] RBP: 00007fe3d5f69000 R08: 0000000000000009 R09: 0000000000001000 [ 31.194272] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c92eeb5ec0 [ 31.195113] R13: 00007ffc962a07f0 R14: 00007ffc962a0820 R15: 00007ffc962a0b80 [ 31.195970] [ 31.196261] [ 31.196474] Allocated by task 213: [ 31.196906] kasan_save_stack+0x22/0x50 [ 31.197411] kasan_set_track+0x25/0x30 [ 31.197905] __kasan_slab_alloc+0x59/0x70 [ 31.198441] kmem_cache_alloc+0x16b/0x370 [ 31.198959] vm_area_dup+0x20/0x160 [ 31.199416] __split_vma+0x170/0x950 [ 31.199880] split_vma+0xc6/0x110 [ 31.200318] mprotect_fixup+0x8d2/0xb30 [ 31.200827] do_mprotect_pkey+0x87e/0xd40 [ 31.201344] __x64_sys_mprotect+0x78/0xc0 [ 31.201862] do_syscall_64+0x3f/0x90 [ 31.202344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.202984] [ 31.203197] Freed by task 213: [ 31.203606] kasan_save_stack+0x22/0x50 [ 31.204108] kasan_set_track+0x25/0x30 [ 31.204603] kasan_save_free_info+0x2b/0x50 [ 31.205136] __kasan_slab_free+0x10a/0x190 [ 31.205665] kmem_cache_free+0x10d/0x4d0 [ 31.206215] rcu_core+0x8c8/0x2860 [ 31.206663] __do_softirq+0x1b7/0x7d4 [ 31.207140] [ 31.207358] Last potentially related work creation: [ 31.207945] kasan_save_stack+0x22/0x50 [ 31.208446] __kasan_record_aux_stack+0x8e/0xa0 [ 31.209017] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.209655] remove_vma+0x139/0x170 [ 31.210123] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.210688] do_vmi_munmap+0x1f1/0x2b0 [ 31.211168] __vm_munmap+0x138/0x3a0 [ 31.211635] __x64_sys_munmap+0x59/0x80 [ 31.212132] do_syscall_64+0x3f/0x90 [ 31.212606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.213252] [ 31.213469] The buggy address belongs to the object at ffff88800f033cb0 [ 31.213469] which belongs to the cache vm_area_struct of size 168 [ 31.214972] The buggy address is located 88 bytes inside of [ 31.214972] freed 168-byte region [ffff88800f033cb0, ffff88800f033d58) [ 31.216367] [ 31.216585] The buggy address belongs to the physical page: [ 31.217241] page:00000000645c0b45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf033 [ 31.218336] memcg:ffff88800e83d401 [ 31.218763] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.219404] page_type: 0xffffffff() [ 31.219849] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.220756] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e83d401 [ 31.221653] page dumped because: kasan: bad access detected [ 31.222315] [ 31.222533] Memory state around the buggy address: [ 31.223107] ffff88800f033c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.223978] ffff88800f033c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.224827] >ffff88800f033d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.225672] ^ [ 31.226131] ffff88800f033d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.226984] ffff88800f033e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.227832] ================================================================== [ 31.228816] Disabling lock debugging due to kernel taint [ 33.039963] BUG: Bad rss-counter state mm:00000000fbe1548a type:MM_FILEPAGES val:33 [ 33.040987] BUG: Bad rss-counter state mm:00000000fbe1548a type:MM_ANONPAGES val:22 [ 33.406493] BUG: Bad rss-counter state mm:000000001c7569a5 type:MM_FILEPAGES val:33 [ 33.407531] BUG: Bad rss-counter state mm:000000001c7569a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22267' (ECDSA) to the list of known hosts. 2023/06/20 20:29:08 fuzzer started 2023/06/20 20:29:08 dialing manager at localhost:36067 2023/06/20 20:29:08 checking machine... 2023/06/20 20:29:08 checking revisions... [ 34.014957] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:29:08 testing simple program... [ 34.078569] cgroup: Unknown subsys name 'net' [ 34.126297] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:29:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000014 RCX=0000000000000000 RDX=ffff88800f8b3680 RSI=ffffffff8184ccf4 RDI=ffff88800f8b36a0 RBP=ffff88800e2cbc14 RSP=ffff888019d6fb90 R8 =0000000000000007 R9 =0000000000000010 R10=ffff88800e2cbc00 R11=00000000000b6a61 R12=ffff88800e2cbc00 R13=0000000000000000 R14=ffff88800e2cbc13 R15=ffff88801a37f640 RIP=ffffffff8184ccfb RFL=00000293 [--S-A-C] 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 00007f7f8c101900 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=00007ffff9d65000 CR3=000000000e436000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800d800001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800d7ffe01 RSI=ffff88800d7ffe98 RDI=ffff88800d7ffe98 RBP=ffff88800d7ffa30 RSP=ffff88800d7ff960 R8 =0000000000000001 R9 =ffff88800d7ffa18 R10=0000000000038001 R11=000000000000fdcc R12=ffff88800d7ffa38 R13=ffff88800d7ffa20 R14=ffff88800d7ffe98 R15=ffff88800d7ff9d8 RIP=ffffffff8112fbf0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f692589f900 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=00007f6924cc2fc0 CR3=000000000d8e6000 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=eefc55e7523f98aa4741519f72b639be XMM02=0000000000119d70d59e07bde36eea69 XMM03=0000000000119e98ec2efd57dc4c00df XMM04=7b66a7516b16298700000000000ae988 XMM05=40e1516a5bdb38fc00000000001321f0 XMM06=c291bd5c70af25b90000000000130fe0 XMM07=fb795ef6d65770560000000000121338 XMM08=2c67c8bc2e329bc30000000000119e98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000