syzkaller login: [ 42.468311] BUG: Bad rss-counter state mm:00000000555405f5 type:MM_FILEPAGES val:33 [ 42.469495] BUG: Bad rss-counter state mm:00000000555405f5 type:MM_ANONPAGES val:22 [ 42.619881] ================================================================== [ 42.620958] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.622095] Read of size 8 at addr ffff8880168a3c20 by task sshd/221 [ 42.623172] [ 42.623384] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.624246] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.625221] Call Trace: [ 42.625530] [ 42.625798] dump_stack_lvl+0x91/0xf0 [ 42.626276] print_report+0xcc/0x620 [ 42.626757] ? __virt_addr_valid+0x102/0x340 [ 42.627312] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.627918] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.628539] kasan_report+0xbe/0xf0 [ 42.628989] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.629578] vma_interval_tree_remove+0xc75/0xec0 [ 42.630148] vma_prepare+0xc54/0x11a0 [ 42.630628] __split_vma+0x5af/0x950 [ 42.631083] ? __pfx___split_vma+0x10/0x10 [ 42.631589] ? find_held_lock+0x2c/0x110 [ 42.632098] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.632642] ? lock_is_held_type+0x9f/0x120 [ 42.633171] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.633768] ? mtree_range_walk+0x632/0x900 [ 42.634317] ? mas_walk+0x5c7/0x7c0 [ 42.634783] do_vmi_munmap+0x1f1/0x2b0 [ 42.635269] mmap_region+0x1f9/0x2660 [ 42.635739] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.636234] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.636929] ? __pfx_lock_acquire+0x10/0x10 [ 42.637438] ? __pfx_mmap_region+0x10/0x10 [ 42.637946] ? security_mmap_addr+0x7d/0xa0 [ 42.638466] ? get_unmapped_area+0x1f5/0x3f0 [ 42.638998] do_mmap+0x854/0xf00 [ 42.639422] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.639902] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.640440] ksys_mmap_pgoff+0x3af/0x500 [ 42.640961] do_syscall_64+0x3f/0x90 [ 42.641432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.642097] RIP: 0033:0x7f8840fc6d82 [ 42.642564] 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 [ 42.644627] RSP: 002b:00007ffe715c9688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.645520] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8840fc6d82 [ 42.646377] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8840400000 [ 42.647203] RBP: 00007f8840400000 R08: 0000000000000009 R09: 0000000000001000 [ 42.648056] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d591ee0b20 [ 42.648925] R13: 00007ffe715c96a0 R14: 00007ffe715c96d0 R15: 00007ffe715c9a30 [ 42.649759] [ 42.650039] [ 42.650252] Allocated by task 214: [ 42.650712] kasan_save_stack+0x22/0x50 [ 42.651221] kasan_set_track+0x25/0x30 [ 42.651713] __kasan_slab_alloc+0x59/0x70 [ 42.652227] kmem_cache_alloc+0x16b/0x370 [ 42.652740] vm_area_dup+0x20/0x160 [ 42.653188] __split_vma+0x170/0x950 [ 42.653649] split_vma+0xc6/0x110 [ 42.654081] mprotect_fixup+0x8d2/0xb30 [ 42.654582] do_mprotect_pkey+0x87e/0xd40 [ 42.655096] __x64_sys_mprotect+0x78/0xc0 [ 42.655611] do_syscall_64+0x3f/0x90 [ 42.656072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.656699] [ 42.656917] Freed by task 214: [ 42.657302] kasan_save_stack+0x22/0x50 [ 42.657799] kasan_set_track+0x25/0x30 [ 42.658292] kasan_save_free_info+0x2b/0x50 [ 42.658822] __kasan_slab_free+0x10a/0x190 [ 42.659354] kmem_cache_free+0x10d/0x4d0 [ 42.659852] rcu_core+0x8c8/0x2860 [ 42.660287] __do_softirq+0x1b7/0x7d4 [ 42.660760] [ 42.660979] Last potentially related work creation: [ 42.661563] kasan_save_stack+0x22/0x50 [ 42.662058] __kasan_record_aux_stack+0x8e/0xa0 [ 42.662640] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.663286] remove_vma+0x139/0x170 [ 42.663831] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.664384] do_vmi_munmap+0x1f1/0x2b0 [ 42.664863] __vm_munmap+0x138/0x3a0 [ 42.665323] __x64_sys_munmap+0x59/0x80 [ 42.665814] do_syscall_64+0x3f/0x90 [ 42.666292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.666933] [ 42.667146] The buggy address belongs to the object at ffff8880168a3bc8 [ 42.667146] which belongs to the cache vm_area_struct of size 168 [ 42.668597] The buggy address is located 88 bytes inside of [ 42.668597] freed 168-byte region [ffff8880168a3bc8, ffff8880168a3c70) [ 42.669986] [ 42.670207] The buggy address belongs to the physical page: [ 42.670876] page:000000006d26e53c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168a3 [ 42.671964] memcg:ffff88800e72d601 [ 42.672386] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.673022] page_type: 0xffffffff() [ 42.673464] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.674374] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e72d601 [ 42.675274] page dumped because: kasan: bad access detected [ 42.675929] [ 42.676145] Memory state around the buggy address: [ 42.676719] ffff8880168a3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.677557] ffff8880168a3b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 42.678423] >ffff8880168a3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 42.679303] ^ [ 42.679809] ffff8880168a3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 42.680670] ffff8880168a3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 42.681526] ================================================================== [ 42.682455] Disabling lock debugging due to kernel taint [ 44.724834] BUG: Bad rss-counter state mm:000000003b032a05 type:MM_FILEPAGES val:33 [ 44.725771] BUG: Bad rss-counter state mm:000000003b032a05 type:MM_ANONPAGES val:22 [ 45.186075] BUG: Bad rss-counter state mm:000000005d092fa0 type:MM_FILEPAGES val:33 [ 45.186687] BUG: Bad rss-counter state mm:000000005d092fa0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16562' (ECDSA) to the list of known hosts. 2023/06/20 00:56:21 fuzzer started 2023/06/20 00:56:21 dialing manager at localhost:44161 2023/06/20 00:56:21 checking machine... 2023/06/20 00:56:21 checking revisions... [ 45.890839] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:56:22 testing simple program... [ 45.936420] cgroup: Unknown subsys name 'net' [ 45.987844] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:56:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019b4aaa8 RCX=ffffffff81c60191 RDX=ffff8880100a51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880165a2900 RSP=ffff88800f28f940 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=ffff888010094000 R14=ffff8880165a29d0 R15=ffff888010094000 RIP=ffffffff814c07e0 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 00007fc2ba4b1700 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=00007f6036b17740 CR3=000000000e128000 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=2031323a36353a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a36353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=00000000000361a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806cf361a0 RBP=ffff88800cbf6600 RSP=ffff888008e57c80 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffff88807ffdc000 R13=0000000000000006 R14=00000000fffffd78 R15=ffff88806cf361a0 RIP=ffffffff812d8e20 RFL=00000086 [--S--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 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=00007ffeb5bbc000 CR3=000000000dbce000 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=23232323232323232323232323232323 XMM01=000000000000000000000000000000ff XMM02=00000000000000000000000000000000 XMM03=6c656472657375202c736579206f7420 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffff00ffffffffffffffffffffffff XMM08=2c736579206f74207465732066492023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000