Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.535422] BUG: Bad rss-counter state mm:000000008b84cc83 type:MM_FILEPAGES val:33 [ 30.536944] BUG: Bad rss-counter state mm:000000008b84cc83 type:MM_ANONPAGES val:22 [ 30.734232] ================================================================== [ 30.735252] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.736237] Read of size 8 at addr ffff88800f12aed8 by task sshd/220 [ 30.737073] [ 30.737312] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.738219] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.739269] Call Trace: [ 30.739602] [ 30.739908] dump_stack_lvl+0x91/0xf0 [ 30.740451] print_report+0xcc/0x620 [ 30.740969] ? __virt_addr_valid+0x102/0x340 [ 30.741549] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.742190] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.742840] kasan_report+0xbe/0xf0 [ 30.743360] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.744012] vma_interval_tree_remove+0xc75/0xec0 [ 30.744665] vma_prepare+0xc54/0x11a0 [ 30.745196] __split_vma+0x5af/0x950 [ 30.745714] ? __pfx___split_vma+0x10/0x10 [ 30.746290] ? find_held_lock+0x2c/0x110 [ 30.746884] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.747517] ? lock_is_held_type+0x9f/0x120 [ 30.748096] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.748754] ? mtree_range_walk+0x632/0x900 [ 30.749357] ? mas_walk+0x5c7/0x7c0 [ 30.749862] do_vmi_munmap+0x1f1/0x2b0 [ 30.750393] mmap_region+0x1f9/0x2660 [ 30.750929] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.751483] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.752272] ? __pfx_lock_acquire+0x10/0x10 [ 30.752850] ? __pfx_mmap_region+0x10/0x10 [ 30.753425] ? security_mmap_addr+0x7d/0xa0 [ 30.753992] ? get_unmapped_area+0x1f5/0x3f0 [ 30.754588] do_mmap+0x854/0xf00 [ 30.755065] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.755605] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.756198] ksys_mmap_pgoff+0x3af/0x500 [ 30.756727] do_syscall_64+0x3f/0x90 [ 30.757242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757909] RIP: 0033:0x7ff822300d82 [ 30.758402] 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 [ 30.760635] RSP: 002b:00007ffc953e9e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.761598] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff822300d82 [ 30.762485] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff82173a000 [ 30.763445] RBP: 00007ff82173a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.764341] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fdf4771ec0 [ 30.765252] R13: 00007ffc953e9e60 R14: 00007ffc953e9e90 R15: 00007ffc953ea1f0 [ 30.766274] [ 30.766604] [ 30.766826] Allocated by task 213: [ 30.767280] kasan_save_stack+0x22/0x50 [ 30.767786] kasan_set_track+0x25/0x30 [ 30.768306] __kasan_slab_alloc+0x59/0x70 [ 30.768838] kmem_cache_alloc+0x16b/0x370 [ 30.769381] vm_area_dup+0x20/0x160 [ 30.769841] __split_vma+0x170/0x950 [ 30.770339] split_vma+0xc6/0x110 [ 30.770800] mprotect_fixup+0x8d2/0xb30 [ 30.771331] do_mprotect_pkey+0x87e/0xd40 [ 30.771856] __x64_sys_mprotect+0x78/0xc0 [ 30.772399] do_syscall_64+0x3f/0x90 [ 30.772888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.773549] [ 30.773765] Freed by task 213: [ 30.774160] kasan_save_stack+0x22/0x50 [ 30.774694] kasan_set_track+0x25/0x30 [ 30.775235] kasan_save_free_info+0x2b/0x50 [ 30.775798] __kasan_slab_free+0x10a/0x190 [ 30.776398] kmem_cache_free+0x10d/0x4d0 [ 30.776926] rcu_core+0x8c8/0x2860 [ 30.777400] __do_softirq+0x1b7/0x7d4 [ 30.777880] [ 30.778100] Last potentially related work creation: [ 30.778700] kasan_save_stack+0x22/0x50 [ 30.779212] __kasan_record_aux_stack+0x8e/0xa0 [ 30.779787] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.780428] remove_vma+0x139/0x170 [ 30.780883] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.781442] do_vmi_munmap+0x1f1/0x2b0 [ 30.781940] __vm_munmap+0x138/0x3a0 [ 30.782426] __x64_sys_munmap+0x59/0x80 [ 30.782947] do_syscall_64+0x3f/0x90 [ 30.783448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.784109] [ 30.784331] The buggy address belongs to the object at ffff88800f12ae80 [ 30.784331] which belongs to the cache vm_area_struct of size 168 [ 30.785862] The buggy address is located 88 bytes inside of [ 30.785862] freed 168-byte region [ffff88800f12ae80, ffff88800f12af28) [ 30.787376] [ 30.787594] The buggy address belongs to the physical page: [ 30.788273] page:0000000028fa9d95 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf12a [ 30.789374] memcg:ffff888019fe5a01 [ 30.789802] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.790460] page_type: 0xffffffff() [ 30.790935] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.792045] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fe5a01 [ 30.793039] page dumped because: kasan: bad access detected [ 30.793876] [ 30.794156] Memory state around the buggy address: [ 30.794921] ffff88800f12ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.796047] ffff88800f12ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.797240] >ffff88800f12ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.798609] ^ [ 30.799820] ffff88800f12af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.801255] ffff88800f12af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.802709] ================================================================== [ 30.804417] Disabling lock debugging due to kernel taint [ 32.534887] BUG: Bad rss-counter state mm:000000005cf6aa3d type:MM_FILEPAGES val:33 [ 32.535535] BUG: Bad rss-counter state mm:000000005cf6aa3d type:MM_ANONPAGES val:22 [ 32.951904] BUG: Bad rss-counter state mm:0000000093afa664 type:MM_FILEPAGES val:33 [ 32.953075] BUG: Bad rss-counter state mm:0000000093afa664 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57365' (ECDSA) to the list of known hosts. 2023/06/20 12:34:17 fuzzer started 2023/06/20 12:34:18 dialing manager at localhost:36067 2023/06/20 12:34:18 checking machine... 2023/06/20 12:34:18 checking revisions... [ 33.495327] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:34:18 testing simple program... [ 33.531616] cgroup: Unknown subsys name 'net' [ 33.561560] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:34:17 Registers: info registers vcpu 0 RAX=1ffff1100d9c745b RBX=00000000000063bc RCX=ffffffff812e0135 RDX=1ffffffff0ac2cea RSI=ffff88806ce3a2c0 RDI=ffffffff85616740 RBP=ffffffff85616780 RSP=ffff888008da7d58 R8 =0000000000000001 R9 =ffffed10011b4f9f R10=0000000000000003 R11=0000000000000000 R12=ffffffff85616740 R13=ffffffff85616740 R14=dffffc0000000000 R15=ffffffff85d3e490 RIP=ffffffff81369f32 RFL=00000046 [---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 =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=00007f94c368f7c0 CR3=0000000009736000 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=3af081f4a70217b31647abaa64f0155a XMM02=000000000011d5b8ec2efd57dc4c00df XMM03=00000000001228f0a10faa235208d5a4 XMM04=6e61ad7d9432ed0f00000000000ae988 XMM05=19e9129bd510f2350000000000132400 XMM06=61e186e316c310bf00000000001315d8 XMM07=e042d86d42eb936e0000000000122b70 XMM08=a10faa235208d5a4000000000011d618 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880147f3680 RSI=ffffffff83632149 RDI=ffff888018e38000 RBP=ffff888018e38000 RSP=ffff888018a7fe50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=1ffff1100314ffd1 R15=dffffc0000000000 RIP=ffffffff814c0860 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f75f2568900 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=00007ffef4405000 CR3=0000000019e8e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000