syzkaller login: [ 49.651272] BUG: Bad rss-counter state mm:0000000071d2fbce type:MM_FILEPAGES val:33 [ 49.651962] BUG: Bad rss-counter state mm:0000000071d2fbce type:MM_ANONPAGES val:22 [ 49.703874] ================================================================== [ 49.704492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.705094] Read of size 8 at addr ffff88800e759c20 by task sshd/219 [ 49.705584] [ 49.705751] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.706299] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.706928] Call Trace: [ 49.707139] <TASK> [ 49.707374] dump_stack_lvl+0x91/0xf0 [ 49.707695] print_report+0xcc/0x620 [ 49.708015] ? __virt_addr_valid+0x102/0x340 [ 49.708378] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.708778] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.709171] kasan_report+0xbe/0xf0 [ 49.709482] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.709883] vma_interval_tree_remove+0xc75/0xec0 [ 49.710273] vma_prepare+0xc54/0x11a0 [ 49.710588] __split_vma+0x5af/0x950 [ 49.710928] ? __pfx___split_vma+0x10/0x10 [ 49.711312] ? find_held_lock+0x2c/0x110 [ 49.711652] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.712065] ? lock_is_held_type+0x9f/0x120 [ 49.712417] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.712812] ? mtree_range_walk+0x632/0x900 [ 49.713173] ? mas_walk+0x5c7/0x7c0 [ 49.713482] do_vmi_munmap+0x1f1/0x2b0 [ 49.713810] mmap_region+0x1f9/0x2660 [ 49.714122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.714456] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.714916] ? __pfx_lock_acquire+0x10/0x10 [ 49.715294] ? __pfx_mmap_region+0x10/0x10 [ 49.715639] ? security_mmap_addr+0x7d/0xa0 [ 49.715988] ? get_unmapped_area+0x1f5/0x3f0 [ 49.716345] do_mmap+0x854/0xf00 [ 49.716635] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.716981] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.717344] ksys_mmap_pgoff+0x3af/0x500 [ 49.717671] do_syscall_64+0x3f/0x90 [ 49.718030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.718449] RIP: 0033:0x7fd320dc0d82 [ 49.718746] 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 [ 49.720122] RSP: 002b:00007ffe3422c2e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.720705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd320dc0d82 [ 49.721246] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3201fa000 [ 49.721791] RBP: 00007fd3201fa000 R08: 0000000000000009 R09: 0000000000001000 [ 49.722334] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a5814bf70 [ 49.722910] R13: 00007ffe3422c300 R14: 00007ffe3422c330 R15: 00007ffe3422c690 [ 49.723483] </TASK> [ 49.723672] [ 49.723834] Allocated by task 212: [ 49.724130] kasan_save_stack+0x22/0x50 [ 49.724460] kasan_set_track+0x25/0x30 [ 49.724786] __kasan_slab_alloc+0x59/0x70 [ 49.725131] kmem_cache_alloc+0x16b/0x370 [ 49.725466] vm_area_dup+0x20/0x160 [ 49.725764] __split_vma+0x170/0x950 [ 49.726070] split_vma+0xc6/0x110 [ 49.726359] mprotect_fixup+0x8d2/0xb30 [ 49.726683] do_mprotect_pkey+0x87e/0xd40 [ 49.727023] __x64_sys_mprotect+0x78/0xc0 [ 49.727386] do_syscall_64+0x3f/0x90 [ 49.727695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.728113] [ 49.728255] Freed by task 13: [ 49.728501] kasan_save_stack+0x22/0x50 [ 49.728858] kasan_set_track+0x25/0x30 [ 49.729180] kasan_save_free_info+0x2b/0x50 [ 49.729521] __kasan_slab_free+0x10a/0x190 [ 49.729906] kmem_cache_free+0x10d/0x4d0 [ 49.730244] rcu_core+0x8c8/0x2860 [ 49.730537] __do_softirq+0x1b7/0x7d4 [ 49.730849] [ 49.730992] Last potentially related work creation: [ 49.731400] kasan_save_stack+0x22/0x50 [ 49.731724] __kasan_record_aux_stack+0x8e/0xa0 [ 49.732095] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.732512] remove_vma+0x139/0x170 [ 49.732809] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.733172] do_vmi_munmap+0x1f1/0x2b0 [ 49.733599] __vm_munmap+0x138/0x3a0 [ 49.747316] __x64_sys_munmap+0x59/0x80 [ 49.747652] do_syscall_64+0x3f/0x90 [ 49.747962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.748381] [ 49.748522] Second to last potentially related work creation: [ 49.748962] kasan_save_stack+0x22/0x50 [ 49.749292] __kasan_record_aux_stack+0x8e/0xa0 [ 49.749663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.750083] remove_vma+0x139/0x170 [ 49.750379] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.750750] do_vmi_munmap+0x1f1/0x2b0 [ 49.751084] mmap_region+0x1f9/0x2660 [ 49.751438] do_mmap+0x854/0xf00 [ 49.751722] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.752089] ksys_mmap_pgoff+0x3af/0x500 [ 49.752417] do_syscall_64+0x3f/0x90 [ 49.752729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.753144] [ 49.753286] The buggy address belongs to the object at ffff88800e759bc8 [ 49.753286] which belongs to the cache vm_area_struct of size 168 [ 49.754211] The buggy address is located 88 bytes inside of [ 49.754211] freed 168-byte region [ffff88800e759bc8, ffff88800e759c70) [ 49.755109] [ 49.763235] The buggy address belongs to the physical page: [ 49.765374] page:00000000b285909c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe759 [ 49.766074] memcg:ffff88800d1e8101 [ 49.766350] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.766768] page_type: 0xffffffff() [ 49.767061] raw: 0100000000000200 ffff88800879fc80 ffffea00003b7300 dead000000000008 [ 49.771613] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1e8101 [ 49.772197] page dumped because: kasan: bad access detected [ 49.772623] [ 49.772774] Memory state around the buggy address: [ 49.773149] ffff88800e759b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.773693] ffff88800e759b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 49.774287] >ffff88800e759c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 49.774835] ^ [ 49.775187] ffff88800e759c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 49.775744] ffff88800e759d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 49.776292] ================================================================== [ 49.776923] Disabling lock debugging due to kernel taint [ 54.405187] BUG: Bad rss-counter state mm:00000000b66c6b40 type:MM_FILEPAGES val:33 [ 54.405877] BUG: Bad rss-counter state mm:00000000b66c6b40 type:MM_ANONPAGES val:22 [ 55.063293] BUG: Bad rss-counter state mm:000000002ad8d796 type:MM_FILEPAGES val:33 [ 55.063983] BUG: Bad rss-counter state mm:000000002ad8d796 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61279' (ECDSA) to the list of known hosts. 2023/06/20 08:05:40 fuzzer started 2023/06/20 08:05:41 dialing manager at localhost:44161 2023/06/20 08:05:41 checking machine... 2023/06/20 08:05:41 checking revisions... [ 55.953588] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:05:41 testing simple program... [ 56.013142] cgroup: Unknown subsys name 'net' [ 56.104476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:05:26 Registers: info registers vcpu 0 RAX=ffff7fffffffffff RBX=0000000000000000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff85d3bed0 RSP=ffff8880103c7b60 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000006 R14=00000000ffffff10 R15=ffff888016830f00 RIP=ffffffff8180eefc RFL=00000216 [----AP-] 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 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=00007f93bbe72328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e58001 RBX=ffff888008e57978 RCX=0000000000000001 RDX=ffff888008e57901 RSI=ffff888008e57948 RDI=ffff888008e57988 RBP=ffff888008e57948 RSP=ffff888008e57880 R8 =0000000000000001 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff888008e50000 R14=ffff888008e57948 R15=ffff888008e57978 RIP=ffffffff811304c9 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 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=00007f1d25e9a298 CR3=000000000ebfe000 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=756e696c2d34365f3638782f62696c2f XMM01=2e6f747079726362696c2f756e672d78 XMM02=00312e312e6f732e6f74707972636269 XMM03=6c2f756e672d78756e696c2d34365f36 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000