[ 25.436743] BUG: Bad rss-counter state mm:00000000d2dfc905 type:MM_FILEPAGES val:33 [ 25.438230] BUG: Bad rss-counter state mm:00000000d2dfc905 type:MM_ANONPAGES val:22 [ 25.588392] ================================================================== [ 25.589310] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.590252] Read of size 8 at addr ffff88801bc46310 by task sshd/219 [ 25.591026] [ 25.591256] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.592202] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.593201] Call Trace: [ 25.593527] [ 25.593840] dump_stack_lvl+0x91/0xf0 [ 25.594340] print_report+0xcc/0x620 [ 25.594825] ? __virt_addr_valid+0x102/0x340 [ 25.595394] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.596008] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.596626] kasan_report+0xbe/0xf0 [ 25.597146] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.597773] vma_interval_tree_remove+0xc75/0xec0 [ 25.598373] vma_prepare+0xc54/0x11a0 [ 25.598850] __split_vma+0x5af/0x950 [ 25.599335] ? __pfx___split_vma+0x10/0x10 [ 25.599863] ? find_held_lock+0x2c/0x110 [ 25.600378] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.600939] ? lock_is_held_type+0x9f/0x120 [ 25.601500] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.602117] ? mtree_range_walk+0x632/0x900 [ 25.602667] ? mas_walk+0x5c7/0x7c0 [ 25.603143] do_vmi_munmap+0x1f1/0x2b0 [ 25.603662] mmap_region+0x1f9/0x2660 [ 25.604140] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.604650] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.605359] ? __pfx_lock_acquire+0x10/0x10 [ 25.605906] ? __pfx_mmap_region+0x10/0x10 [ 25.606447] ? security_mmap_addr+0x7d/0xa0 [ 25.606974] ? get_unmapped_area+0x1f5/0x3f0 [ 25.607537] do_mmap+0x854/0xf00 [ 25.607970] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.608479] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.609066] ksys_mmap_pgoff+0x3af/0x500 [ 25.609596] do_syscall_64+0x3f/0x90 [ 25.610093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.610776] RIP: 0033:0x7f682b090d82 [ 25.611239] 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 [ 25.613391] RSP: 002b:00007ffe10062fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.614292] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f682b090d82 [ 25.615136] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f682a4ca000 [ 25.615999] RBP: 00007f682a4ca000 R08: 0000000000000009 R09: 0000000000001000 [ 25.616842] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f42be95ec0 [ 25.617685] R13: 00007ffe10062fe0 R14: 00007ffe10063010 R15: 00007ffe10063370 [ 25.618541] [ 25.618831] [ 25.619043] Allocated by task 209: [ 25.619471] kasan_save_stack+0x22/0x50 [ 25.619969] kasan_set_track+0x25/0x30 [ 25.620458] __kasan_slab_alloc+0x59/0x70 [ 25.620977] kmem_cache_alloc+0x16b/0x370 [ 25.621490] vm_area_dup+0x20/0x160 [ 25.621940] __split_vma+0x170/0x950 [ 25.622403] split_vma+0xc6/0x110 [ 25.622837] mprotect_fixup+0x8d2/0xb30 [ 25.623341] do_mprotect_pkey+0x87e/0xd40 [ 25.623854] __x64_sys_mprotect+0x78/0xc0 [ 25.624370] do_syscall_64+0x3f/0x90 [ 25.624847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.625486] [ 25.625701] Freed by task 209: [ 25.626091] kasan_save_stack+0x22/0x50 [ 25.626594] kasan_set_track+0x25/0x30 [ 25.627083] kasan_save_free_info+0x2b/0x50 [ 25.627632] __kasan_slab_free+0x10a/0x190 [ 25.628163] kmem_cache_free+0x10d/0x4d0 [ 25.628666] rcu_core+0x8c8/0x2860 [ 25.629106] __do_softirq+0x1b7/0x7d4 [ 25.629576] [ 25.629793] Last potentially related work creation: [ 25.630373] kasan_save_stack+0x22/0x50 [ 25.630875] __kasan_record_aux_stack+0x8e/0xa0 [ 25.631453] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.632088] remove_vma+0x139/0x170 [ 25.632536] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.633096] do_vmi_munmap+0x1f1/0x2b0 [ 25.633575] __vm_munmap+0x138/0x3a0 [ 25.634038] __x64_sys_munmap+0x59/0x80 [ 25.634531] do_syscall_64+0x3f/0x90 [ 25.635003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.635658] [ 25.635877] The buggy address belongs to the object at ffff88801bc462b8 [ 25.635877] which belongs to the cache vm_area_struct of size 168 [ 25.637347] The buggy address is located 88 bytes inside of [ 25.637347] freed 168-byte region [ffff88801bc462b8, ffff88801bc46360) [ 25.638740] [ 25.638956] The buggy address belongs to the physical page: [ 25.639623] page:00000000be046da5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc46 [ 25.640707] memcg:ffff888019b99901 [ 25.641133] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.641775] page_type: 0xffffffff() [ 25.642226] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.643148] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b99901 [ 25.644090] page dumped because: kasan: bad access detected [ 25.644716] [ 25.644921] Memory state around the buggy address: [ 25.645463] ffff88801bc46200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 25.646272] ffff88801bc46280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 25.647085] >ffff88801bc46300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 25.647899] ^ [ 25.648337] ffff88801bc46380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 25.649143] ffff88801bc46400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 25.649938] ================================================================== [ 25.650862] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.460555] BUG: Bad rss-counter state mm:0000000023e9d1f4 type:MM_FILEPAGES val:33 [ 27.461270] BUG: Bad rss-counter state mm:0000000023e9d1f4 type:MM_ANONPAGES val:22 [ 27.859004] BUG: Bad rss-counter state mm:00000000a84213c7 type:MM_FILEPAGES val:33 [ 27.860155] BUG: Bad rss-counter state mm:00000000a84213c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49167' (ECDSA) to the list of known hosts. 2023/06/19 23:08:43 fuzzer started 2023/06/19 23:08:44 dialing manager at localhost:44161 2023/06/19 23:08:44 checking machine... 2023/06/19 23:08:44 checking revisions... [ 28.630879] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:08:44 testing simple program... [ 28.698931] cgroup: Unknown subsys name 'net' [ 28.737358] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:08:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f8fdaa740b0 CR3=000000000c6ae000 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=2132d1d1a54c92a28e4464b0fa06587f XMM02=000000000011da90ec2efd57dc4c00df XMM03=00000000001237a84b5df509d431648c XMM04=90211435aa40cbce00000000000ae988 XMM05=dfcdbad4f1609c370000000000133600 XMM06=9b420e1ebb6dd06100000000001327d8 XMM07=e042d86d42eb936e0000000000124018 XMM08=4b5df509d431648c000000000011daf0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f9d59c62618 CR3=0000000014362000 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=2033343a38303a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a38303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000