[ 30.596410] BUG: Bad rss-counter state mm:00000000fb2e0333 type:MM_FILEPAGES val:33 [ 30.597428] BUG: Bad rss-counter state mm:00000000fb2e0333 type:MM_ANONPAGES val:22 [ 30.765442] ================================================================== [ 30.766403] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.767344] Read of size 8 at addr ffff888016d2bc20 by task sshd/219 [ 30.768109] [ 30.768336] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.769422] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.770414] Call Trace: [ 30.770735] [ 30.771041] dump_stack_lvl+0x91/0xf0 [ 30.771528] print_report+0xcc/0x620 [ 30.772013] ? __virt_addr_valid+0x102/0x340 [ 30.772600] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773215] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773847] kasan_report+0xbe/0xf0 [ 30.774333] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774959] vma_interval_tree_remove+0xc75/0xec0 [ 30.775569] vma_prepare+0xc54/0x11a0 [ 30.776046] __split_vma+0x5af/0x950 [ 30.776539] ? __pfx___split_vma+0x10/0x10 [ 30.777072] ? find_held_lock+0x2c/0x110 [ 30.777594] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.778155] ? lock_is_held_type+0x9f/0x120 [ 30.778694] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.779299] ? mtree_range_walk+0x632/0x900 [ 30.779849] ? mas_walk+0x5c7/0x7c0 [ 30.780337] do_vmi_munmap+0x1f1/0x2b0 [ 30.780835] mmap_region+0x1f9/0x2660 [ 30.781334] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.781852] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.782576] ? __pfx_lock_acquire+0x10/0x10 [ 30.783112] ? __pfx_mmap_region+0x10/0x10 [ 30.783655] ? security_mmap_addr+0x7d/0xa0 [ 30.784201] ? get_unmapped_area+0x1f5/0x3f0 [ 30.784778] do_mmap+0x854/0xf00 [ 30.785226] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.785727] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.786295] ksys_mmap_pgoff+0x3af/0x500 [ 30.786808] do_syscall_64+0x3f/0x90 [ 30.787295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787954] RIP: 0033:0x7f72392a5d82 [ 30.788429] 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 [ 30.790562] RSP: 002b:00007ffffd974168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.791470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72392a5d82 [ 30.792336] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72386df000 [ 30.793195] RBP: 00007f72386df000 R08: 0000000000000009 R09: 0000000000001000 [ 30.794067] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd7e71ab20 [ 30.794922] R13: 00007ffffd974180 R14: 00007ffffd9741b0 R15: 00007ffffd974510 [ 30.795797] [ 30.796091] [ 30.796320] Allocated by task 212: [ 30.796757] kasan_save_stack+0x22/0x50 [ 30.797263] kasan_set_track+0x25/0x30 [ 30.797768] __kasan_slab_alloc+0x59/0x70 [ 30.798297] kmem_cache_alloc+0x16b/0x370 [ 30.798817] vm_area_dup+0x20/0x160 [ 30.799271] __split_vma+0x170/0x950 [ 30.799749] split_vma+0xc6/0x110 [ 30.800197] mprotect_fixup+0x8d2/0xb30 [ 30.800702] do_mprotect_pkey+0x87e/0xd40 [ 30.801233] __x64_sys_mprotect+0x78/0xc0 [ 30.801752] do_syscall_64+0x3f/0x90 [ 30.802230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802875] [ 30.803096] Freed by task 212: [ 30.803490] kasan_save_stack+0x22/0x50 [ 30.804001] kasan_set_track+0x25/0x30 [ 30.804516] kasan_save_free_info+0x2b/0x50 [ 30.805056] __kasan_slab_free+0x10a/0x190 [ 30.805592] kmem_cache_free+0x10d/0x4d0 [ 30.806102] rcu_core+0x8c8/0x2860 [ 30.806556] __do_softirq+0x1b7/0x7d4 [ 30.807042] [ 30.807260] Last potentially related work creation: [ 30.807856] kasan_save_stack+0x22/0x50 [ 30.808375] __kasan_record_aux_stack+0x8e/0xa0 [ 30.808950] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.809596] remove_vma+0x139/0x170 [ 30.810130] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.810694] do_vmi_munmap+0x1f1/0x2b0 [ 30.811189] __vm_munmap+0x138/0x3a0 [ 30.811672] __x64_sys_munmap+0x59/0x80 [ 30.812194] do_syscall_64+0x3f/0x90 [ 30.812690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813354] [ 30.813571] The buggy address belongs to the object at ffff888016d2bbc8 [ 30.813571] which belongs to the cache vm_area_struct of size 168 [ 30.815050] The buggy address is located 88 bytes inside of [ 30.815050] freed 168-byte region [ffff888016d2bbc8, ffff888016d2bc70) [ 30.816483] [ 30.816698] The buggy address belongs to the physical page: [ 30.817375] page:00000000f9b998d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d2b [ 30.818470] memcg:ffff888019e60501 [ 30.818905] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.819565] page_type: 0xffffffff() [ 30.820030] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.820972] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e60501 [ 30.821894] page dumped because: kasan: bad access detected [ 30.822568] [ 30.822787] Memory state around the buggy address: [ 30.823383] ffff888016d2bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.824267] ffff888016d2bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.825136] >ffff888016d2bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.825991] ^ [ 30.826530] ffff888016d2bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.827394] ffff888016d2bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.828261] ================================================================== [ 30.829201] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.136402] BUG: Bad rss-counter state mm:00000000565142d7 type:MM_FILEPAGES val:33 [ 33.137712] BUG: Bad rss-counter state mm:00000000565142d7 type:MM_ANONPAGES val:22 [ 33.630339] BUG: Bad rss-counter state mm:000000005743b86d type:MM_FILEPAGES val:33 [ 33.631509] BUG: Bad rss-counter state mm:000000005743b86d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50539' (ECDSA) to the list of known hosts. 2023/06/21 00:45:51 fuzzer started 2023/06/21 00:45:51 dialing manager at localhost:36067 2023/06/21 00:45:51 checking machine... 2023/06/21 00:45:51 checking revisions... [ 34.278867] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:45:51 testing simple program... [ 34.319100] cgroup: Unknown subsys name 'net' [ 34.352916] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:45:50 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=00007ffe6d8bc7e8 CR3=00000000169e2000 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=2030353a35343a3030203132206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a343834343320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a35343a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000055e8e2d1c870 RBX=000055e8e2d14d60 RCX=000055e8e2d25630 RDX=0000000000000003 RSI=000055e8e2d25630 RDI=000055e8e2d1c2a0 RBP=0000000000000001 RSP=00007ffe58989a10 R8 =0000000000000000 R9 =000000000010b0d8 R10=00007f3e758e4a68 R11=000000000052545f R12=000055e8e2d25630 R13=000000000010b0d8 R14=000000000010b0d8 R15=0000000000000000 RIP=00007f3e7588166b RFL=00000202 [-------] 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 00007f3e74cef900 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=00005612f01f5748 CR3=000000000d648000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=00b1b4a10acee0f800000000000ae988 XMM05=eba29e16bd35f1e10000000000132e50 XMM06=806171799158d9670000000000131b80 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000