[ 30.844836] BUG: Bad rss-counter state mm:000000005dcb200d type:MM_FILEPAGES val:33 [ 30.846082] BUG: Bad rss-counter state mm:000000005dcb200d type:MM_ANONPAGES val:22 [ 30.991844] ================================================================== [ 30.992786] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.993677] Read of size 8 at addr ffff888010323140 by task sshd/219 [ 30.994390] [ 30.994613] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.995562] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.996564] Call Trace: [ 30.996894] [ 30.997204] dump_stack_lvl+0x91/0xf0 [ 30.997742] print_report+0xcc/0x620 [ 30.998276] ? __virt_addr_valid+0x102/0x340 [ 30.998881] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.999562] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.000242] kasan_report+0xbe/0xf0 [ 31.000725] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.001345] vma_interval_tree_remove+0xc75/0xec0 [ 31.001945] vma_prepare+0xc54/0x11a0 [ 31.002420] __split_vma+0x5af/0x950 [ 31.002891] ? __pfx___split_vma+0x10/0x10 [ 31.003414] ? find_held_lock+0x2c/0x110 [ 31.003931] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.004508] ? lock_is_held_type+0x9f/0x120 [ 31.005041] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.005654] ? mtree_range_walk+0x632/0x900 [ 31.006206] ? mas_walk+0x5c7/0x7c0 [ 31.006683] do_vmi_munmap+0x1f1/0x2b0 [ 31.007182] mmap_region+0x1f9/0x2660 [ 31.007666] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.008189] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.008912] ? __pfx_lock_acquire+0x10/0x10 [ 31.009481] ? __pfx_mmap_region+0x10/0x10 [ 31.010060] ? security_mmap_addr+0x7d/0xa0 [ 31.010646] ? get_unmapped_area+0x1f5/0x3f0 [ 31.011245] do_mmap+0x854/0xf00 [ 31.011725] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.012276] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.012886] ksys_mmap_pgoff+0x3af/0x500 [ 31.013446] do_syscall_64+0x3f/0x90 [ 31.013966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.014670] RIP: 0033:0x7f5e97efad82 [ 31.015172] 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 [ 31.017531] RSP: 002b:00007ffd75971e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.018497] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e97efad82 [ 31.019407] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e97334000 [ 31.020314] RBP: 00007f5e97334000 R08: 0000000000000009 R09: 0000000000001000 [ 31.021148] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654eb56fec0 [ 31.021980] R13: 00007ffd75971e30 R14: 00007ffd75971e60 R15: 00007ffd759721c0 [ 31.022832] [ 31.023136] [ 31.023353] Allocated by task 212: [ 31.023777] kasan_save_stack+0x22/0x50 [ 31.024296] kasan_set_track+0x25/0x30 [ 31.024789] __kasan_slab_alloc+0x59/0x70 [ 31.025309] kmem_cache_alloc+0x16b/0x370 [ 31.025818] vm_area_dup+0x20/0x160 [ 31.026272] __split_vma+0x170/0x950 [ 31.026737] split_vma+0xc6/0x110 [ 31.027195] mprotect_fixup+0x8d2/0xb30 [ 31.027714] do_mprotect_pkey+0x87e/0xd40 [ 31.028271] __x64_sys_mprotect+0x78/0xc0 [ 31.028817] do_syscall_64+0x3f/0x90 [ 31.029319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.029991] [ 31.030223] Freed by task 203: [ 31.030635] kasan_save_stack+0x22/0x50 [ 31.031174] kasan_set_track+0x25/0x30 [ 31.031689] kasan_save_free_info+0x2b/0x50 [ 31.032277] __kasan_slab_free+0x10a/0x190 [ 31.032826] kmem_cache_free+0x10d/0x4d0 [ 31.033365] rcu_core+0x8c8/0x2860 [ 31.033840] __do_softirq+0x1b7/0x7d4 [ 31.034350] [ 31.034569] Last potentially related work creation: [ 31.035194] kasan_save_stack+0x22/0x50 [ 31.035720] __kasan_record_aux_stack+0x8e/0xa0 [ 31.036354] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.037025] remove_vma+0x139/0x170 [ 31.037502] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.038096] do_vmi_munmap+0x1f1/0x2b0 [ 31.038597] __vm_munmap+0x138/0x3a0 [ 31.039087] __x64_sys_munmap+0x59/0x80 [ 31.039606] do_syscall_64+0x3f/0x90 [ 31.040116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.040780] [ 31.041007] Second to last potentially related work creation: [ 31.041731] kasan_save_stack+0x22/0x50 [ 31.042268] __kasan_record_aux_stack+0x8e/0xa0 [ 31.042871] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.043543] remove_vma+0x139/0x170 [ 31.044030] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.044607] do_vmi_munmap+0x1f1/0x2b0 [ 31.045119] mmap_region+0x1f9/0x2660 [ 31.045620] do_mmap+0x854/0xf00 [ 31.046080] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.046595] ksys_mmap_pgoff+0x3af/0x500 [ 31.047115] do_syscall_64+0x3f/0x90 [ 31.047612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.048314] [ 31.048535] The buggy address belongs to the object at ffff8880103230e8 [ 31.048535] which belongs to the cache vm_area_struct of size 168 [ 31.050095] The buggy address is located 88 bytes inside of [ 31.050095] freed 168-byte region [ffff8880103230e8, ffff888010323190) [ 31.051574] [ 31.051802] The buggy address belongs to the physical page: [ 31.052514] page:00000000bf0ee4f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10323 [ 31.053645] memcg:ffff888014749301 [ 31.054109] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.054843] page_type: 0xffffffff() [ 31.055327] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.056322] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014749301 [ 31.057280] page dumped because: kasan: bad access detected [ 31.057990] [ 31.058218] Memory state around the buggy address: [ 31.058833] ffff888010323000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.059744] ffff888010323080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.060662] >ffff888010323100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.061568] ^ [ 31.062244] ffff888010323180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.063139] ffff888010323200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.064040] ================================================================== [ 31.065053] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.958511] BUG: Bad rss-counter state mm:0000000066424594 type:MM_FILEPAGES val:33 [ 32.959721] BUG: Bad rss-counter state mm:0000000066424594 type:MM_ANONPAGES val:22 [ 33.509701] BUG: Bad rss-counter state mm:00000000e797fab5 type:MM_FILEPAGES val:33 [ 33.510916] BUG: Bad rss-counter state mm:00000000e797fab5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28470' (ECDSA) to the list of known hosts. 2023/06/20 19:21:28 fuzzer started 2023/06/20 19:21:28 dialing manager at localhost:36067 2023/06/20 19:21:28 checking machine... 2023/06/20 19:21:28 checking revisions... [ 34.138524] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:21:28 testing simple program... [ 34.188814] cgroup: Unknown subsys name 'net' [ 34.231482] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:21:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001cee255 RSI=0000000000000000 RDI=ffff88800e7712a8 RBP=ffff8880169aa000 RSP=ffff8880147cf9c0 R8 =0000000000000005 R9 =0000000000000000 R10=ffff8880147cfa88 R11=2e302e303120746f R12=ffff8880169aa510 R13=0000000000000001 R14=ffff8880147cfa88 R15=ffff88800e771280 RIP=ffffffff83c20aa5 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 00007fbe055da900 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=00007fbe04a3d880 CR3=000000000f610000 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=0643aa7c4332fa906c4fbff67f2dbccb XMM02=000000000011b258eff9b2d0a8fce9cb XMM03=000000000011b3282c67c8bc2e329bc3 XMM04=1f8e4cda529cf89500000000000ae988 XMM05=f5e1c841f6eb1fdc0000000000133c88 XMM06=806171799158d96700000000001329b8 XMM07=fb795ef6d65770560000000000121c68 XMM08=2c67c8bc2e329bc3000000000011b2c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001ff2f16 RCX=0000000000000000 RDX=ffff888016fab680 RSI=ffffffff83742002 RDI=ffff888016faba74 RBP=ffff88800f5bd800 RSP=ffff88800ff97888 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800e771500 R15=0000000000000000 RIP=ffffffff814c089b 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 00007f3f06356900 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=00007f3f0690d618 CR3=000000000dbea000 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=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