[ 23.740909] BUG: Bad rss-counter state mm:00000000cde299ef type:MM_FILEPAGES val:33 [ 23.742352] BUG: Bad rss-counter state mm:00000000cde299ef type:MM_ANONPAGES val:22 [ 23.889725] ================================================================== [ 23.890673] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.891623] Read of size 8 at addr ffff88801a35bdf0 by task sshd/220 [ 23.892564] [ 23.892787] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.893656] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.894647] Call Trace: [ 23.894965] [ 23.895257] dump_stack_lvl+0x91/0xf0 [ 23.895757] print_report+0xcc/0x620 [ 23.896242] ? __virt_addr_valid+0x102/0x340 [ 23.896838] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.897469] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.898095] kasan_report+0xbe/0xf0 [ 23.898584] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.899204] vma_interval_tree_remove+0xc75/0xec0 [ 23.899819] vma_prepare+0xc54/0x11a0 [ 23.900322] __split_vma+0x5af/0x950 [ 23.900830] ? __pfx___split_vma+0x10/0x10 [ 23.901376] ? find_held_lock+0x2c/0x110 [ 23.901912] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.902478] ? lock_is_held_type+0x9f/0x120 [ 23.903016] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.903628] ? mtree_range_walk+0x632/0x900 [ 23.904178] ? mas_walk+0x5c7/0x7c0 [ 23.904699] do_vmi_munmap+0x1f1/0x2b0 [ 23.905191] mmap_region+0x1f9/0x2660 [ 23.905672] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.906181] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.906902] ? __pfx_lock_acquire+0x10/0x10 [ 23.907436] ? __pfx_mmap_region+0x10/0x10 [ 23.907968] ? security_mmap_addr+0x7d/0xa0 [ 23.908549] ? get_unmapped_area+0x1f5/0x3f0 [ 23.909097] do_mmap+0x854/0xf00 [ 23.909541] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.910033] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.910595] ksys_mmap_pgoff+0x3af/0x500 [ 23.911109] do_syscall_64+0x3f/0x90 [ 23.911588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.912232] RIP: 0033:0x7f4f9d693d82 [ 23.912743] 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 [ 23.914866] RSP: 002b:00007ffc07849fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.915775] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f9d693d82 [ 23.916650] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f9cacd000 [ 23.917497] RBP: 00007f4f9cacd000 R08: 0000000000000009 R09: 0000000000001000 [ 23.918371] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559aed38bd90 [ 23.919229] R13: 00007ffc07849ff0 R14: 00007ffc0784a020 R15: 00007ffc0784a380 [ 23.920091] [ 23.920412] [ 23.920626] Allocated by task 213: [ 23.921055] kasan_save_stack+0x22/0x50 [ 23.921570] kasan_set_track+0x25/0x30 [ 23.922079] __kasan_slab_alloc+0x59/0x70 [ 23.922606] kmem_cache_alloc+0x16b/0x370 [ 23.923119] vm_area_dup+0x20/0x160 [ 23.923582] __split_vma+0x170/0x950 [ 23.924054] split_vma+0xc6/0x110 [ 23.924541] mprotect_fixup+0x8d2/0xb30 [ 23.925048] do_mprotect_pkey+0x87e/0xd40 [ 23.925568] __x64_sys_mprotect+0x78/0xc0 [ 23.926088] do_syscall_64+0x3f/0x90 [ 23.926567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.927220] [ 23.927441] Freed by task 13: [ 23.927824] kasan_save_stack+0x22/0x50 [ 23.928343] kasan_set_track+0x25/0x30 [ 23.928850] kasan_save_free_info+0x2b/0x50 [ 23.929388] __kasan_slab_free+0x10a/0x190 [ 23.929926] kmem_cache_free+0x10d/0x4d0 [ 23.930441] rcu_core+0x8c8/0x2860 [ 23.930884] __do_softirq+0x1b7/0x7d4 [ 23.931374] [ 23.931592] Last potentially related work creation: [ 23.932175] kasan_save_stack+0x22/0x50 [ 23.932715] __kasan_record_aux_stack+0x8e/0xa0 [ 23.933291] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.933937] remove_vma+0x139/0x170 [ 23.934400] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.934965] do_vmi_munmap+0x1f1/0x2b0 [ 23.935459] __vm_munmap+0x138/0x3a0 [ 23.935932] __x64_sys_munmap+0x59/0x80 [ 23.936459] do_syscall_64+0x3f/0x90 [ 23.936978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.937629] [ 23.937849] The buggy address belongs to the object at ffff88801a35bd98 [ 23.937849] which belongs to the cache vm_area_struct of size 168 [ 23.939336] The buggy address is located 88 bytes inside of [ 23.939336] freed 168-byte region [ffff88801a35bd98, ffff88801a35be40) [ 23.940794] [ 23.941009] The buggy address belongs to the physical page: [ 23.941678] page:00000000123c383c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a35b [ 23.942790] memcg:ffff88800e872a01 [ 23.943221] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.943870] page_type: 0xffffffff() [ 23.944340] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.945272] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e872a01 [ 23.946190] page dumped because: kasan: bad access detected [ 23.946857] [ 23.947074] Memory state around the buggy address: [ 23.947657] ffff88801a35bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 23.948548] ffff88801a35bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 23.949405] >ffff88801a35bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 23.950259] ^ [ 23.951073] ffff88801a35be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 23.951932] ffff88801a35be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.952817] ================================================================== [ 23.953797] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.917802] BUG: Bad rss-counter state mm:0000000031930fc7 type:MM_FILEPAGES val:33 [ 25.918720] BUG: Bad rss-counter state mm:0000000031930fc7 type:MM_ANONPAGES val:22 [ 26.401743] BUG: Bad rss-counter state mm:00000000481649dc type:MM_FILEPAGES val:33 [ 26.402750] BUG: Bad rss-counter state mm:00000000481649dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55632' (ECDSA) to the list of known hosts. 2023/06/20 21:44:32 fuzzer started 2023/06/20 21:44:32 dialing manager at localhost:36067 2023/06/20 21:44:32 checking machine... 2023/06/20 21:44:32 checking revisions... [ 27.142142] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:44:32 testing simple program... [ 27.174503] cgroup: Unknown subsys name 'net' [ 27.223302] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:44:32 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=00007ffc40122ff8 CR3=000000000e5d8000 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=2032333a34343a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a34343a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000010 RBX=00007ffc97f89c60 RCX=0000000000000010 RDX=0000000000000011 RSI=0000561fdc0b62f0 RDI=0000561fdc0bce19 RBP=0000561fdc0b62f0 RSP=00007ffc97f89c38 R8 =0000561fdc0bce10 R9 =003d454e494c444d R10=00007ffc97f89b27 R11=0000000000000000 R12=0000561fdc0bce10 R13=00007ffc97f8a730 R14=000000000000001f R15=00007ffc97f8a4b0 RIP=00007f96bdf5ef7b RFL=00000206 [-----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 00007f96bd632900 00000000 00000000 GS =0000 0000000000000000 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=00007fe002764650 CR3=000000000c654000 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=ffffffffffffff00ffffffffffffffff XMM02=ffffffffffffff00000000000000ff00 XMM03=5443454a424f003d454e494c444d435f XMM04=3a58237fc720ef0700000000000ae988 XMM05=2d5fca04cfd7e0de0000000000131ff0 XMM06=19e9129bd510f2350000000000130b18 XMM07=00000000000000000000000000000000 XMM08=3d454e494c444d435f5443454a424f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000