[ 61.866482] BUG: Bad rss-counter state mm:000000003f3bd041 type:MM_FILEPAGES val:33 [ 61.867732] BUG: Bad rss-counter state mm:000000003f3bd041 type:MM_ANONPAGES val:22 [ 61.903505] ================================================================== [ 61.904555] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.905657] Read of size 8 at addr ffff8880199ee310 by task sshd/225 [ 61.906537] [ 61.906756] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.907682] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.908822] Call Trace: [ 61.909140] [ 61.909428] dump_stack_lvl+0x91/0xf0 [ 61.909923] print_report+0xcc/0x620 [ 61.910436] ? __virt_addr_valid+0x102/0x340 [ 61.910987] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.911610] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.912345] kasan_report+0xbe/0xf0 [ 61.912864] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.913487] vma_interval_tree_remove+0xc75/0xec0 [ 61.914191] vma_prepare+0xc54/0x11a0 [ 61.914778] __split_vma+0x5af/0x950 [ 61.915253] ? __pfx___split_vma+0x10/0x10 [ 61.915849] ? find_held_lock+0x2c/0x110 [ 61.916407] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.917094] ? lock_is_held_type+0x9f/0x120 [ 61.917709] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.918345] ? mtree_range_walk+0x632/0x900 [ 61.918899] ? mas_walk+0x5c7/0x7c0 [ 61.919382] do_vmi_munmap+0x1f1/0x2b0 [ 61.919874] mmap_region+0x1f9/0x2660 [ 61.920347] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.920860] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.921570] ? __pfx_lock_acquire+0x10/0x10 [ 61.922123] ? __pfx_mmap_region+0x10/0x10 [ 61.922659] ? security_mmap_addr+0x7d/0xa0 [ 61.923187] ? get_unmapped_area+0x1f5/0x3f0 [ 61.923738] do_mmap+0x854/0xf00 [ 61.924173] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.924670] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.925224] ksys_mmap_pgoff+0x3af/0x500 [ 61.925739] do_syscall_64+0x3f/0x90 [ 61.926246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.926904] RIP: 0033:0x7f5a45bd4d82 [ 61.927363] 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 [ 61.929471] RSP: 002b:00007ffd2945aac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.930400] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a45bd4d82 [ 61.931460] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a4500e000 [ 61.932302] RBP: 00007f5a4500e000 R08: 0000000000000009 R09: 0000000000001000 [ 61.933161] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db6c6f5ec0 [ 61.934025] R13: 00007ffd2945aae0 R14: 00007ffd2945ab10 R15: 00007ffd2945ae70 [ 61.934924] [ 61.935229] [ 61.935449] Allocated by task 210: [ 61.935889] kasan_save_stack+0x22/0x50 [ 61.936410] kasan_set_track+0x25/0x30 [ 61.936914] __kasan_slab_alloc+0x59/0x70 [ 61.937443] kmem_cache_alloc+0x16b/0x370 [ 61.937976] vm_area_dup+0x20/0x160 [ 61.938452] __split_vma+0x170/0x950 [ 61.938954] split_vma+0xc6/0x110 [ 61.939397] mprotect_fixup+0x8d2/0xb30 [ 61.939894] do_mprotect_pkey+0x87e/0xd40 [ 61.940427] __x64_sys_mprotect+0x78/0xc0 [ 61.940951] do_syscall_64+0x3f/0x90 [ 61.941433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.942111] [ 61.942325] Freed by task 210: [ 61.942713] kasan_save_stack+0x22/0x50 [ 61.943208] kasan_set_track+0x25/0x30 [ 61.943698] kasan_save_free_info+0x2b/0x50 [ 61.944223] __kasan_slab_free+0x10a/0x190 [ 61.944755] kmem_cache_free+0x10d/0x4d0 [ 61.945262] rcu_core+0x8c8/0x2860 [ 61.945703] __do_softirq+0x1b7/0x7d4 [ 61.946194] [ 61.946411] Last potentially related work creation: [ 61.946988] kasan_save_stack+0x22/0x50 [ 61.947484] __kasan_record_aux_stack+0x8e/0xa0 [ 61.948051] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.948686] remove_vma+0x139/0x170 [ 61.949137] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.949711] do_vmi_munmap+0x1f1/0x2b0 [ 61.950220] __vm_munmap+0x138/0x3a0 [ 61.950696] __x64_sys_munmap+0x59/0x80 [ 61.951200] do_syscall_64+0x3f/0x90 [ 61.951681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.952343] [ 61.952564] The buggy address belongs to the object at ffff8880199ee2b8 [ 61.952564] which belongs to the cache vm_area_struct of size 168 [ 61.954110] The buggy address is located 88 bytes inside of [ 61.954110] freed 168-byte region [ffff8880199ee2b8, ffff8880199ee360) [ 61.955525] [ 61.955746] The buggy address belongs to the physical page: [ 61.956408] page:000000000d695ee7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199ee [ 61.957516] memcg:ffff888015d0c601 [ 61.957939] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.958607] page_type: 0xffffffff() [ 61.959056] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.959981] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d0c601 [ 61.960887] page dumped because: kasan: bad access detected [ 61.961556] [ 61.961769] Memory state around the buggy address: [ 61.962355] ffff8880199ee200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 61.963205] ffff8880199ee280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 61.964063] >ffff8880199ee300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 61.964912] ^ [ 61.965373] ffff8880199ee380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 61.966234] ffff8880199ee400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 61.967127] ================================================================== [ 61.968124] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 63.852569] BUG: Bad rss-counter state mm:000000003679732b type:MM_FILEPAGES val:33 [ 63.853566] BUG: Bad rss-counter state mm:000000003679732b type:MM_ANONPAGES val:22 [ 64.377668] BUG: Bad rss-counter state mm:0000000049705f92 type:MM_FILEPAGES val:33 [ 64.378850] BUG: Bad rss-counter state mm:0000000049705f92 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29983' (ECDSA) to the list of known hosts. 2023/06/20 18:43:55 fuzzer started 2023/06/20 18:43:56 dialing manager at localhost:36067 2023/06/20 18:43:56 checking machine... 2023/06/20 18:43:56 checking revisions... [ 65.057210] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:43:56 testing simple program... [ 65.113186] cgroup: Unknown subsys name 'net' [ 65.148242] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:43:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffff8880180474a8 RDX=1ffff11003008e8c RSI=ffff8880180473d8 RDI=ffff888018047408 RBP=ffff888018047460 RSP=ffff888018047348 R8 =0000000000000001 R9 =ffff888018047448 R10=0000000000038001 R11=0000000000006097 R12=ffffed1003008e83 R13=ffffed1003008e82 R14=ffff888018047450 R15=ffff888018047408 RIP=ffffffff81130628 RFL=00000212 [----A--] 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 00007f15686c7700 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=00007f8b2c8f7ac8 CR3=00000000180e6000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3433325b646873732035353a3334 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323434 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11003027f4c RBX=000000000000000c RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000000f RDI=ffff88801813fa60 RBP=dffffc0000000000 RSP=ffff88801813f970 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000f R13=0000000000000000 R14=ffff88801813fa00 R15=ffff8880163c4698 RIP=ffffffff813ad61a 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 00007fd49f716900 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=00007ffc410b7000 CR3=000000000dbdc000 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=563412feff00545000000000000080fe 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