[ 23.731807] sshd (212) used greatest stack depth: 23992 bytes left [ 23.734480] BUG: Bad rss-counter state mm:00000000a8443c43 type:MM_FILEPAGES val:33 [ 23.735660] BUG: Bad rss-counter state mm:00000000a8443c43 type:MM_ANONPAGES val:22 [ 23.891135] ================================================================== [ 23.892136] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.893103] Read of size 8 at addr ffff88800fd305c8 by task sshd/219 [ 23.894035] [ 23.894276] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.895225] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.896177] Call Trace: [ 23.896482] [ 23.896756] dump_stack_lvl+0x91/0xf0 [ 23.897221] print_report+0xcc/0x620 [ 23.897684] ? __virt_addr_valid+0x102/0x340 [ 23.898258] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.898902] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.899531] kasan_report+0xbe/0xf0 [ 23.900010] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.900648] vma_interval_tree_remove+0xc75/0xec0 [ 23.901275] vma_prepare+0xc54/0x11a0 [ 23.901763] __split_vma+0x5af/0x950 [ 23.902237] ? __pfx___split_vma+0x10/0x10 [ 23.902787] ? find_held_lock+0x2c/0x110 [ 23.903314] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.903894] ? lock_is_held_type+0x9f/0x120 [ 23.904438] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.905049] ? mtree_range_walk+0x632/0x900 [ 23.905608] ? mas_walk+0x5c7/0x7c0 [ 23.906090] do_vmi_munmap+0x1f1/0x2b0 [ 23.906607] mmap_region+0x1f9/0x2660 [ 23.907091] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.907603] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.908323] ? __pfx_lock_acquire+0x10/0x10 [ 23.908871] ? __pfx_mmap_region+0x10/0x10 [ 23.909408] ? security_mmap_addr+0x7d/0xa0 [ 23.909940] ? get_unmapped_area+0x1f5/0x3f0 [ 23.910520] do_mmap+0x854/0xf00 [ 23.910961] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.911455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.912046] ksys_mmap_pgoff+0x3af/0x500 [ 23.912554] do_syscall_64+0x3f/0x90 [ 23.913035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.913689] RIP: 0033:0x7f0fe9758d82 [ 23.914151] 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 [ 23.916303] RSP: 002b:00007ffdc3717388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.917229] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0fe9758d82 [ 23.918093] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0fe8b92000 [ 23.918964] RBP: 00007f0fe8b92000 R08: 0000000000000009 R09: 0000000000001000 [ 23.919822] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560611db9ec0 [ 23.920700] R13: 00007ffdc37173a0 R14: 00007ffdc37173d0 R15: 00007ffdc3717730 [ 23.921584] [ 23.921877] [ 23.922094] Allocated by task 212: [ 23.922561] kasan_save_stack+0x22/0x50 [ 23.923065] kasan_set_track+0x25/0x30 [ 23.923568] __kasan_slab_alloc+0x59/0x70 [ 23.924104] kmem_cache_alloc+0x16b/0x370 [ 23.924627] vm_area_dup+0x20/0x160 [ 23.925092] __split_vma+0x170/0x950 [ 23.925569] split_vma+0xc6/0x110 [ 23.926014] mprotect_fixup+0x8d2/0xb30 [ 23.926533] do_mprotect_pkey+0x87e/0xd40 [ 23.927057] __x64_sys_mprotect+0x78/0xc0 [ 23.927589] do_syscall_64+0x3f/0x90 [ 23.928066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.928707] [ 23.928922] Freed by task 212: [ 23.929313] kasan_save_stack+0x22/0x50 [ 23.929817] kasan_set_track+0x25/0x30 [ 23.930307] kasan_save_free_info+0x2b/0x50 [ 23.930874] __kasan_slab_free+0x10a/0x190 [ 23.931405] kmem_cache_free+0x10d/0x4d0 [ 23.931914] rcu_core+0x8c8/0x2860 [ 23.932360] __do_softirq+0x1b7/0x7d4 [ 23.932838] [ 23.933053] Last potentially related work creation: [ 23.933655] kasan_save_stack+0x22/0x50 [ 23.934166] __kasan_record_aux_stack+0x8e/0xa0 [ 23.934756] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.935423] remove_vma+0x139/0x170 [ 23.935888] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.936448] do_vmi_munmap+0x1f1/0x2b0 [ 23.936942] __vm_munmap+0x138/0x3a0 [ 23.937414] __x64_sys_munmap+0x59/0x80 [ 23.937912] do_syscall_64+0x3f/0x90 [ 23.938406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.939061] [ 23.939279] The buggy address belongs to the object at ffff88800fd30570 [ 23.939279] which belongs to the cache vm_area_struct of size 168 [ 23.940769] The buggy address is located 88 bytes inside of [ 23.940769] freed 168-byte region [ffff88800fd30570, ffff88800fd30618) [ 23.942168] [ 23.942403] The buggy address belongs to the physical page: [ 23.943063] page:00000000016c9be1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd30 [ 23.944163] memcg:ffff888019f44d01 [ 23.944597] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.945244] page_type: 0xffffffff() [ 23.945702] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.946650] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f44d01 [ 23.947560] page dumped because: kasan: bad access detected [ 23.948229] [ 23.948444] Memory state around the buggy address: [ 23.949044] ffff88800fd30480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.949913] ffff88800fd30500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 23.950816] >ffff88800fd30580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.951672] ^ [ 23.952341] ffff88800fd30600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.953207] ffff88800fd30680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.954060] ================================================================== [ 23.955380] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.566682] BUG: Bad rss-counter state mm:000000009451c85d type:MM_FILEPAGES val:33 [ 26.567726] BUG: Bad rss-counter state mm:000000009451c85d type:MM_ANONPAGES val:22 [ 27.052788] BUG: Bad rss-counter state mm:000000008b85a284 type:MM_FILEPAGES val:33 [ 27.053787] BUG: Bad rss-counter state mm:000000008b85a284 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59618' (ECDSA) to the list of known hosts. 2023/06/20 20:09:18 fuzzer started 2023/06/20 20:09:18 dialing manager at localhost:36067 2023/06/20 20:09:18 checking machine... 2023/06/20 20:09:18 checking revisions... [ 27.818683] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:09:19 testing simple program... [ 27.867841] cgroup: Unknown subsys name 'net' [ 27.925911] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:09:18 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100339ce94 RSI=ffffffff83636c06 RDI=ffff888019ce7310 RBP=ffff888019ce73a8 RSP=ffff888019ce7310 R8 =0000000000000001 R9 =ffff888019ce7350 R10=0000000000038001 R11=0000000000091bda R12=ffff888019ce73d8 R13=0000000000000000 R14=ffff888019cdd1c0 R15=ffff888019e1ebe0 RIP=ffffffff810bd052 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 00007f2dcfa7a900 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=00007f2dd0031618 CR3=000000000ebc2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fb30e98f000 CR3=000000000f42c000 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=00000000000000000000000000000000 XMM01=74ec4048aa4477934446e6cba96c6bb4 XMM02=000000000011ab80eff9b2d0a8fce9cb XMM03=000000000011ac502c67c8bc2e329bc3 XMM04=e9449c3f6c003c8d00000000000ae988 XMM05=3973560cc633fb050000000000131ed0 XMM06=806171799158d9670000000000131558 XMM07=e042d86d42eb936e0000000000121910 XMM08=0c3b9b3cfe77e6b8000000000011ac50 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000