[ 30.355800] BUG: Bad rss-counter state mm:000000000c2b7953 type:MM_FILEPAGES val:33 [ 30.357326] BUG: Bad rss-counter state mm:000000000c2b7953 type:MM_ANONPAGES val:22 [ 30.561659] ================================================================== [ 30.562269] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.562886] Read of size 8 at addr ffff88800ef24058 by task sshd/222 [ 30.564337] [ 30.564488] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.565062] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.565694] Call Trace: [ 30.565909] [ 30.566099] dump_stack_lvl+0x91/0xf0 [ 30.566430] print_report+0xcc/0x620 [ 30.566755] ? __virt_addr_valid+0x102/0x340 [ 30.567122] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.567765] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.568230] kasan_report+0xbe/0xf0 [ 30.568552] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.569021] vma_interval_tree_remove+0xc75/0xec0 [ 30.569422] vma_prepare+0xc54/0x11a0 [ 30.569744] __split_vma+0x5af/0x950 [ 30.570112] ? __pfx___split_vma+0x10/0x10 [ 30.570471] ? find_held_lock+0x2c/0x110 [ 30.570820] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.572028] ? lock_is_held_type+0x9f/0x120 [ 30.572393] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.572800] ? mtree_range_walk+0x632/0x900 [ 30.573294] ? mas_walk+0x5c7/0x7c0 [ 30.573616] do_vmi_munmap+0x1f1/0x2b0 [ 30.574018] mmap_region+0x1f9/0x2660 [ 30.574342] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.574695] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.575384] ? __pfx_lock_acquire+0x10/0x10 [ 30.575846] ? __pfx_mmap_region+0x10/0x10 [ 30.576211] ? security_mmap_addr+0x7d/0xa0 [ 30.576568] ? get_unmapped_area+0x1f5/0x3f0 [ 30.577294] do_mmap+0x854/0xf00 [ 30.578137] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.579109] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.580315] ksys_mmap_pgoff+0x3af/0x500 [ 30.581309] do_syscall_64+0x3f/0x90 [ 30.582239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.583610] RIP: 0033:0x7f3ea86b5d82 [ 30.584519] 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 [ 30.589228] RSP: 002b:00007ffe5950ec18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.591085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ea86b5d82 [ 30.592848] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ea7aef000 [ 30.594673] RBP: 00007f3ea7aef000 R08: 0000000000000009 R09: 0000000000001000 [ 30.596416] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564980034ec0 [ 30.598275] R13: 00007ffe5950ec30 R14: 00007ffe5950ec60 R15: 00007ffe5950efc0 [ 30.600038] [ 30.600603] [ 30.601014] Allocated by task 213: [ 30.601949] kasan_save_stack+0x22/0x50 [ 30.602928] kasan_set_track+0x25/0x30 [ 30.603900] __kasan_slab_alloc+0x59/0x70 [ 30.604914] kmem_cache_alloc+0x16b/0x370 [ 30.606028] vm_area_dup+0x20/0x160 [ 30.606928] __split_vma+0x170/0x950 [ 30.607854] split_vma+0xc6/0x110 [ 30.608710] mprotect_fixup+0x8d2/0xb30 [ 30.609773] do_mprotect_pkey+0x87e/0xd40 [ 30.610788] __x64_sys_mprotect+0x78/0xc0 [ 30.611824] do_syscall_64+0x3f/0x90 [ 30.612734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.614173] [ 30.614571] Freed by task 213: [ 30.615336] kasan_save_stack+0x22/0x50 [ 30.616324] kasan_set_track+0x25/0x30 [ 30.617269] kasan_save_free_info+0x2b/0x50 [ 30.618409] __kasan_slab_free+0x10a/0x190 [ 30.619476] kmem_cache_free+0x10d/0x4d0 [ 30.620451] rcu_core+0x8c8/0x2860 [ 30.621289] __do_softirq+0x1b7/0x7d4 [ 30.622293] [ 30.622700] Last potentially related work creation: [ 30.623872] kasan_save_stack+0x22/0x50 [ 30.624850] __kasan_record_aux_stack+0x8e/0xa0 [ 30.626064] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.627208] remove_vma+0x139/0x170 [ 30.628058] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.629049] do_vmi_munmap+0x1f1/0x2b0 [ 30.629955] __vm_munmap+0x138/0x3a0 [ 30.630771] __x64_sys_munmap+0x59/0x80 [ 30.631663] do_syscall_64+0x3f/0x90 [ 30.632534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.633773] [ 30.634238] Second to last potentially related work creation: [ 30.635523] kasan_save_stack+0x22/0x50 [ 30.636384] __kasan_record_aux_stack+0x8e/0xa0 [ 30.637372] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.638623] remove_vma+0x139/0x170 [ 30.639511] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.640498] do_vmi_munmap+0x1f1/0x2b0 [ 30.641330] mmap_region+0x1f9/0x2660 [ 30.642150] do_mmap+0x854/0xf00 [ 30.647511] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.647828] ksys_mmap_pgoff+0x3af/0x500 [ 30.648145] do_syscall_64+0x3f/0x90 [ 30.648433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.648819] [ 30.648949] The buggy address belongs to the object at ffff88800ef24000 [ 30.648949] which belongs to the cache vm_area_struct of size 168 [ 30.649822] The buggy address is located 88 bytes inside of [ 30.649822] freed 168-byte region [ffff88800ef24000, ffff88800ef240a8) [ 30.650657] [ 30.650787] The buggy address belongs to the physical page: [ 30.651181] page:00000000d447af5c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef24 [ 30.659379] memcg:ffff88800e64be01 [ 30.659654] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.667397] page_type: 0xffffffff() [ 30.667685] raw: 0100000000000200 ffff88800879fc80 ffffea0000262200 dead000000000008 [ 30.668263] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e64be01 [ 30.668832] page dumped because: kasan: bad access detected [ 30.669251] [ 30.669383] Memory state around the buggy address: [ 30.669728] ffff88800ef23f00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 30.670240] ffff88800ef23f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.670769] >ffff88800ef24000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.671297] ^ [ 30.671734] ffff88800ef24080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.672239] ffff88800ef24100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.672764] ================================================================== [ 30.673510] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.811940] BUG: Bad rss-counter state mm:00000000c405711c type:MM_FILEPAGES val:33 [ 34.812577] BUG: Bad rss-counter state mm:00000000c405711c type:MM_ANONPAGES val:22 [ 36.266120] BUG: Bad rss-counter state mm:00000000ed1a98ae type:MM_FILEPAGES val:33 [ 36.266809] BUG: Bad rss-counter state mm:00000000ed1a98ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23593' (ECDSA) to the list of known hosts. 2023/06/20 08:17:17 fuzzer started 2023/06/20 08:17:17 dialing manager at localhost:44161 2023/06/20 08:17:17 checking machine... 2023/06/20 08:17:17 checking revisions... [ 37.250988] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:17:17 testing simple program... [ 37.322136] cgroup: Unknown subsys name 'net' [ 37.393089] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:17:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=800000001ae2b065 RCX=0000000000000000 RDX=ffff88800fc98000 RSI=ffffffff8171f26e RDI=ffffea00006b8af0 RBP=ffffea00006b8ac0 RSP=ffff88800cee7728 R8 =0000000000000001 R9 =fffff940000d715e R10=ffffea00006b8af3 R11=00000000000b6996 R12=ffffea00006b8af4 R13=0000000000000000 R14=00007ffffd66b000 R15=dffffc0000000000 RIP=ffffffff8171f276 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 00007fc48343d900 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=00007f00ccf7fbf0 CR3=000000001012a000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856167ec RCX=ffff88806ce3a2c0 RDX=1ffff1100d9c749d RSI=1ffffffff0a58b20 RDI=ffff88806ce3a2c0 RBP=ffff88806ce3a2c0 RSP=ffff888008d87ca0 R8 =0000000000000001 R9 =ffffed10011b0f8b R10=0000000000000003 R11=0000000000000000 R12=ffff88806ce3a2c0 R13=ffffffff85616798 R14=ffff88806ce3a4e8 R15=0000000000000000 RIP=ffffffff8136d201 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=00007fc48386d790 CR3=000000000f40c000 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=0000000000000002fffffffe7ffbfeff XMM01=00000000000000008000000000000006 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=5600703c2e2dad720000000000000000 XMM05=1f9ef4ada7a077be7aa7df339fd3a725 XMM06=c2933f8f68c247edad385b1767672563 XMM07=332f3eab55a4b13e4e010b05adf3ce3a XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000