Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.526882] BUG: Bad rss-counter state mm:00000000945a1a73 type:MM_FILEPAGES val:33 [ 35.528131] BUG: Bad rss-counter state mm:00000000945a1a73 type:MM_ANONPAGES val:22 [ 35.681881] ================================================================== [ 35.682799] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.683740] Read of size 8 at addr ffff88800e16ad08 by task sshd/219 [ 35.684527] [ 35.684809] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.685679] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.686653] Call Trace: [ 35.686997] [ 35.687285] dump_stack_lvl+0x91/0xf0 [ 35.687772] print_report+0xcc/0x620 [ 35.688269] ? __virt_addr_valid+0x102/0x340 [ 35.688821] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.689439] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.690049] kasan_report+0xbe/0xf0 [ 35.690527] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.691155] vma_interval_tree_remove+0xc75/0xec0 [ 35.691760] vma_prepare+0xc54/0x11a0 [ 35.692254] __split_vma+0x5af/0x950 [ 35.692723] ? __pfx___split_vma+0x10/0x10 [ 35.693244] ? find_held_lock+0x2c/0x110 [ 35.693765] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.694326] ? lock_is_held_type+0x9f/0x120 [ 35.694860] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.695472] ? mtree_range_walk+0x632/0x900 [ 35.696022] ? mas_walk+0x5c7/0x7c0 [ 35.696500] do_vmi_munmap+0x1f1/0x2b0 [ 35.696984] mmap_region+0x1f9/0x2660 [ 35.697465] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.697975] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.698684] ? __pfx_lock_acquire+0x10/0x10 [ 35.699211] ? __pfx_mmap_region+0x10/0x10 [ 35.699737] ? security_mmap_addr+0x7d/0xa0 [ 35.700297] ? get_unmapped_area+0x1f5/0x3f0 [ 35.700841] do_mmap+0x854/0xf00 [ 35.701281] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.701775] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.702329] ksys_mmap_pgoff+0x3af/0x500 [ 35.702834] do_syscall_64+0x3f/0x90 [ 35.703302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.703936] RIP: 0033:0x7f056105fd82 [ 35.704417] 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 [ 35.706528] RSP: 002b:00007ffe656ac6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.707432] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f056105fd82 [ 35.708290] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0560499000 [ 35.709127] RBP: 00007f0560499000 R08: 0000000000000009 R09: 0000000000001000 [ 35.709978] R10: 0000000000000812 R11: 0000000000000206 R12: 00005583dd5efec0 [ 35.710813] R13: 00007ffe656ac710 R14: 00007ffe656ac740 R15: 00007ffe656acaa0 [ 35.711665] [ 35.711961] [ 35.712190] Allocated by task 212: [ 35.712619] kasan_save_stack+0x22/0x50 [ 35.713123] kasan_set_track+0x25/0x30 [ 35.713616] __kasan_slab_alloc+0x59/0x70 [ 35.714139] kmem_cache_alloc+0x16b/0x370 [ 35.714656] vm_area_dup+0x20/0x160 [ 35.715115] __split_vma+0x170/0x950 [ 35.715582] split_vma+0xc6/0x110 [ 35.716031] mprotect_fixup+0x8d2/0xb30 [ 35.716529] do_mprotect_pkey+0x87e/0xd40 [ 35.717049] __x64_sys_mprotect+0x78/0xc0 [ 35.717569] do_syscall_64+0x3f/0x90 [ 35.718041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.718678] [ 35.718891] Freed by task 212: [ 35.719279] kasan_save_stack+0x22/0x50 [ 35.719780] kasan_set_track+0x25/0x30 [ 35.720296] kasan_save_free_info+0x2b/0x50 [ 35.720823] __kasan_slab_free+0x10a/0x190 [ 35.721354] kmem_cache_free+0x10d/0x4d0 [ 35.721854] rcu_core+0x8c8/0x2860 [ 35.722299] __do_softirq+0x1b7/0x7d4 [ 35.722769] [ 35.722983] Last potentially related work creation: [ 35.723558] kasan_save_stack+0x22/0x50 [ 35.724060] __kasan_record_aux_stack+0x8e/0xa0 [ 35.724627] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.725261] remove_vma+0x139/0x170 [ 35.725710] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.726270] do_vmi_munmap+0x1f1/0x2b0 [ 35.726754] __vm_munmap+0x138/0x3a0 [ 35.727222] __x64_sys_munmap+0x59/0x80 [ 35.727712] do_syscall_64+0x3f/0x90 [ 35.728200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.728839] [ 35.729052] The buggy address belongs to the object at ffff88800e16acb0 [ 35.729052] which belongs to the cache vm_area_struct of size 168 [ 35.730505] The buggy address is located 88 bytes inside of [ 35.730505] freed 168-byte region [ffff88800e16acb0, ffff88800e16ad58) [ 35.731897] [ 35.732118] The buggy address belongs to the physical page: [ 35.732774] page:000000006a2f408e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe16a [ 35.733842] memcg:ffff88800dfc2401 [ 35.734264] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.734899] page_type: 0xffffffff() [ 35.735349] raw: 0100000000000200 ffff88800879fc80 ffffea0000377c00 dead000000000004 [ 35.736277] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfc2401 [ 35.737171] page dumped because: kasan: bad access detected [ 35.737833] [ 35.738046] Memory state around the buggy address: [ 35.738663] ffff88800e16ac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 35.739549] ffff88800e16ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.740482] >ffff88800e16ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.741331] ^ [ 35.741765] ffff88800e16ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.742604] ffff88800e16ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.743449] ================================================================== [ 35.744763] Disabling lock debugging due to kernel taint [ 37.650267] BUG: Bad rss-counter state mm:0000000089b208e3 type:MM_FILEPAGES val:33 [ 37.651185] BUG: Bad rss-counter state mm:0000000089b208e3 type:MM_ANONPAGES val:22 [ 38.201142] BUG: Bad rss-counter state mm:00000000245cf6f7 type:MM_FILEPAGES val:33 [ 38.202304] BUG: Bad rss-counter state mm:00000000245cf6f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39465' (ECDSA) to the list of known hosts. 2023/06/20 07:44:41 fuzzer started 2023/06/20 07:44:41 dialing manager at localhost:44161 2023/06/20 07:44:41 checking machine... 2023/06/20 07:44:41 checking revisions... [ 38.844203] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:44:41 testing simple program... [ 38.889434] cgroup: Unknown subsys name 'net' [ 38.976498] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:44:37 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=00007ff1d1dee2a0 CR3=000000000d5e4000 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=3c3bab97764188bfc84f539572fe0fd3 XMM02=2c67c8bc2e329bc3000000000011d7e0 XMM03=fb795ef6d65770560000000000124180 XMM04=a138ec7406def40600000000000ae988 XMM05=dfcdbad4f1609c370000000000133998 XMM06=c8c288beac62e5f10000000000132b70 XMM07=e042d86d42eb936e0000000000124400 XMM08=a19c2e3991b79b99000000000011d840 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea00006b7788 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffffd40000d6ef9 RSI=ffffffff8170f4bd RDI=ffffea00006b77c8 RBP=ffff8880145cfd90 RSP=ffff8880145cfc00 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea00006b77c0 R13=ffff88801a6aabc8 R14=ffff8880145cfdb8 R15=0000000000000000 RIP=ffffffff8170f4e2 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6a6a778900 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=00007f6a6aeeb30c CR3=000000000e7e0000 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=6720646572637465733a4d41503d706f 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