[ 23.876790] BUG: Bad rss-counter state mm:000000003d6e064e type:MM_FILEPAGES val:33 [ 23.878255] BUG: Bad rss-counter state mm:000000003d6e064e type:MM_ANONPAGES val:22 [ 24.014841] ================================================================== [ 24.015827] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.016826] Read of size 8 at addr ffff888016765d08 by task sshd/220 [ 24.017757] [ 24.017982] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.018916] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.019966] Call Trace: [ 24.020305] [ 24.020614] dump_stack_lvl+0x91/0xf0 [ 24.021134] print_report+0xcc/0x620 [ 24.021643] ? __virt_addr_valid+0x102/0x340 [ 24.022233] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.022892] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.023545] kasan_report+0xbe/0xf0 [ 24.024053] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.024708] vma_interval_tree_remove+0xc75/0xec0 [ 24.025338] vma_prepare+0xc54/0x11a0 [ 24.025847] __split_vma+0x5af/0x950 [ 24.026340] ? __pfx___split_vma+0x10/0x10 [ 24.026906] ? find_held_lock+0x2c/0x110 [ 24.027457] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.028056] ? lock_is_held_type+0x9f/0x120 [ 24.028633] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.029280] ? mtree_range_walk+0x632/0x900 [ 24.029863] ? mas_walk+0x5c7/0x7c0 [ 24.030364] do_vmi_munmap+0x1f1/0x2b0 [ 24.030907] mmap_region+0x1f9/0x2660 [ 24.031418] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.031956] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.032721] ? __pfx_lock_acquire+0x10/0x10 [ 24.033276] ? __pfx_mmap_region+0x10/0x10 [ 24.033830] ? security_mmap_addr+0x7d/0xa0 [ 24.034394] ? get_unmapped_area+0x1f5/0x3f0 [ 24.034981] do_mmap+0x854/0xf00 [ 24.035448] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.035971] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.036571] ksys_mmap_pgoff+0x3af/0x500 [ 24.037094] do_syscall_64+0x3f/0x90 [ 24.037604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.038291] RIP: 0033:0x7f72783b3d82 [ 24.038768] 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 [ 24.041086] RSP: 002b:00007fff55edda48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.042043] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72783b3d82 [ 24.042955] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72777ed000 [ 24.043865] RBP: 00007f72777ed000 R08: 0000000000000009 R09: 0000000000001000 [ 24.044769] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc36630ec0 [ 24.045675] R13: 00007fff55edda60 R14: 00007fff55edda90 R15: 00007fff55edddf0 [ 24.046593] [ 24.046904] [ 24.047130] Allocated by task 213: [ 24.047581] kasan_save_stack+0x22/0x50 [ 24.048119] kasan_set_track+0x25/0x30 [ 24.048649] __kasan_slab_alloc+0x59/0x70 [ 24.049203] kmem_cache_alloc+0x16b/0x370 [ 24.049748] vm_area_dup+0x20/0x160 [ 24.050233] __split_vma+0x170/0x950 [ 24.050724] split_vma+0xc6/0x110 [ 24.051204] mprotect_fixup+0x8d2/0xb30 [ 24.051734] do_mprotect_pkey+0x87e/0xd40 [ 24.052287] __x64_sys_mprotect+0x78/0xc0 [ 24.052839] do_syscall_64+0x3f/0x90 [ 24.053338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.054026] [ 24.054256] Freed by task 213: [ 24.054663] kasan_save_stack+0x22/0x50 [ 24.055199] kasan_set_track+0x25/0x30 [ 24.055724] kasan_save_free_info+0x2b/0x50 [ 24.056286] __kasan_slab_free+0x10a/0x190 [ 24.056850] kmem_cache_free+0x10d/0x4d0 [ 24.057387] rcu_core+0x8c8/0x2860 [ 24.057854] __do_softirq+0x1b7/0x7d4 [ 24.058359] [ 24.058590] Last potentially related work creation: [ 24.059233] kasan_save_stack+0x22/0x50 [ 24.059765] __kasan_record_aux_stack+0x8e/0xa0 [ 24.060367] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.061035] remove_vma+0x139/0x170 [ 24.061507] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.062098] do_vmi_munmap+0x1f1/0x2b0 [ 24.062614] __vm_munmap+0x138/0x3a0 [ 24.063127] __x64_sys_munmap+0x59/0x80 [ 24.063651] do_syscall_64+0x3f/0x90 [ 24.064156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.064843] [ 24.065071] The buggy address belongs to the object at ffff888016765cb0 [ 24.065071] which belongs to the cache vm_area_struct of size 168 [ 24.066629] The buggy address is located 88 bytes inside of [ 24.066629] freed 168-byte region [ffff888016765cb0, ffff888016765d58) [ 24.068139] [ 24.068369] The buggy address belongs to the physical page: [ 24.069067] page:00000000dcff453d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16765 [ 24.070240] memcg:ffff88800d1a3f01 [ 24.070691] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.071441] page_type: 0xffffffff() [ 24.071923] raw: 0100000000000200 ffff8880087a0c80 ffffea0000255dc0 dead000000000005 [ 24.072902] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1a3f01 [ 24.073875] page dumped because: kasan: bad access detected [ 24.074583] [ 24.074809] Memory state around the buggy address: [ 24.075440] ffff888016765c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.076349] ffff888016765c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.077256] >ffff888016765d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.078167] ^ [ 24.078634] ffff888016765d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.079556] ffff888016765e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.080471] ================================================================== [ 24.081605] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.317987] BUG: Bad rss-counter state mm:0000000086d698e6 type:MM_FILEPAGES val:33 [ 26.319159] BUG: Bad rss-counter state mm:0000000086d698e6 type:MM_ANONPAGES val:22 [ 26.784072] BUG: Bad rss-counter state mm:00000000accc37e6 type:MM_FILEPAGES val:33 [ 26.785208] BUG: Bad rss-counter state mm:00000000accc37e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7236' (ECDSA) to the list of known hosts. 2023/06/20 22:40:26 fuzzer started 2023/06/20 22:40:26 dialing manager at localhost:36067 2023/06/20 22:40:26 checking machine... 2023/06/20 22:40:26 checking revisions... [ 27.377131] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:40:26 testing simple program... [ 27.429036] cgroup: Unknown subsys name 'net' [ 27.469909] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:40:25 Registers: info registers vcpu 0 RAX=1ffffffff0bbfc30 RBX=ffffffff85dfe184 RCX=ffffffff8180ce88 RDX=0000000000000000 RSI=ffffffff86139066 RDI=ffffffff85dfe158 RBP=ffffffff85dfe180 RSP=ffff88801a37f650 R8 =ffffffff86139066 R9 =ffff88801a37f748 R10=0000000000038001 R11=0000000000020de5 R12=ffffffff85dfe18c R13=ffffffff85dfe158 R14=ffffffff85dfe17c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007ff7fda46900 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=00007ffcbd6da000 CR3=0000000015e4e000 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=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 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=0000000000000001 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=00007f77b55f9ee0 CR3=000000000d79c000 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=8eff8a562f756cb72e495a3550339121 XMM02=000000000011bb00eff9b2d0a8fce9cb XMM03=000000000011bbd02c67c8bc2e329bc3 XMM04=5d2ecacbe38faa7300000000000ae988 XMM05=19e9129bd510f2350000000000131dc0 XMM06=e0ad1de614361a6f0000000000130f98 XMM07=e042d86d42eb936e00000000001224a8 XMM08=42c81d7124cca14a000000000011bbd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000