[ 24.303840] BUG: Bad rss-counter state mm:00000000f13ae713 type:MM_FILEPAGES val:33 [ 24.305001] BUG: Bad rss-counter state mm:00000000f13ae713 type:MM_ANONPAGES val:22 [ 24.460893] ================================================================== [ 24.461797] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.462722] Read of size 8 at addr ffff8880099ab798 by task sshd/219 [ 24.463588] [ 24.463808] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.464660] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.465621] Call Trace: [ 24.465953] [ 24.466238] dump_stack_lvl+0x91/0xf0 [ 24.466727] print_report+0xcc/0x620 [ 24.467210] ? __virt_addr_valid+0x102/0x340 [ 24.467787] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.468392] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.469000] kasan_report+0xbe/0xf0 [ 24.469481] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.470102] vma_interval_tree_remove+0xc75/0xec0 [ 24.470699] vma_prepare+0xc54/0x11a0 [ 24.471180] __split_vma+0x5af/0x950 [ 24.471661] ? __pfx___split_vma+0x10/0x10 [ 24.472190] ? find_held_lock+0x2c/0x110 [ 24.472711] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.473277] ? lock_is_held_type+0x9f/0x120 [ 24.473813] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.474417] ? mtree_range_walk+0x632/0x900 [ 24.474966] ? mas_walk+0x5c7/0x7c0 [ 24.475445] do_vmi_munmap+0x1f1/0x2b0 [ 24.475936] mmap_region+0x1f9/0x2660 [ 24.476420] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.476924] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.477636] ? __pfx_lock_acquire+0x10/0x10 [ 24.478167] ? __pfx_mmap_region+0x10/0x10 [ 24.478697] ? security_mmap_addr+0x7d/0xa0 [ 24.479241] ? get_unmapped_area+0x1f5/0x3f0 [ 24.479788] do_mmap+0x854/0xf00 [ 24.480225] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.480718] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.481280] ksys_mmap_pgoff+0x3af/0x500 [ 24.481780] do_syscall_64+0x3f/0x90 [ 24.482255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.482904] RIP: 0033:0x7f9c87f32d82 [ 24.483369] 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 [ 24.485477] RSP: 002b:00007ffea069c0a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.486377] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c87f32d82 [ 24.487235] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c8736c000 [ 24.488082] RBP: 00007f9c8736c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.488926] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd7fd7eec0 [ 24.489771] R13: 00007ffea069c0c0 R14: 00007ffea069c0f0 R15: 00007ffea069c450 [ 24.490617] [ 24.490906] [ 24.491118] Allocated by task 212: [ 24.491551] kasan_save_stack+0x22/0x50 [ 24.492053] kasan_set_track+0x25/0x30 [ 24.492551] __kasan_slab_alloc+0x59/0x70 [ 24.493066] kmem_cache_alloc+0x16b/0x370 [ 24.493580] vm_area_dup+0x20/0x160 [ 24.494033] __split_vma+0x170/0x950 [ 24.494491] split_vma+0xc6/0x110 [ 24.494931] mprotect_fixup+0x8d2/0xb30 [ 24.495449] do_mprotect_pkey+0x87e/0xd40 [ 24.495963] __x64_sys_mprotect+0x78/0xc0 [ 24.496481] do_syscall_64+0x3f/0x90 [ 24.496965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.497596] [ 24.497812] Freed by task 212: [ 24.498202] kasan_save_stack+0x22/0x50 [ 24.498700] kasan_set_track+0x25/0x30 [ 24.499195] kasan_save_free_info+0x2b/0x50 [ 24.499755] __kasan_slab_free+0x10a/0x190 [ 24.500283] kmem_cache_free+0x10d/0x4d0 [ 24.500790] rcu_core+0x8c8/0x2860 [ 24.501231] __do_softirq+0x1b7/0x7d4 [ 24.501711] [ 24.501924] Last potentially related work creation: [ 24.502513] kasan_save_stack+0x22/0x50 [ 24.503013] __kasan_record_aux_stack+0x8e/0xa0 [ 24.503608] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.504248] remove_vma+0x139/0x170 [ 24.504697] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.505246] do_vmi_munmap+0x1f1/0x2b0 [ 24.505736] __vm_munmap+0x138/0x3a0 [ 24.506193] __x64_sys_munmap+0x59/0x80 [ 24.506684] do_syscall_64+0x3f/0x90 [ 24.507162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.507818] [ 24.508032] The buggy address belongs to the object at ffff8880099ab740 [ 24.508032] which belongs to the cache vm_area_struct of size 168 [ 24.509493] The buggy address is located 88 bytes inside of [ 24.509493] freed 168-byte region [ffff8880099ab740, ffff8880099ab7e8) [ 24.510885] [ 24.511104] The buggy address belongs to the physical page: [ 24.511782] page:00000000534f9d9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99ab [ 24.512843] memcg:ffff88800f1a3301 [ 24.513265] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.513952] page_type: 0xffffffff() [ 24.514406] raw: 0100000000000200 ffff8880087a0c80 ffffea0000335740 dead000000000003 [ 24.515327] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1a3301 [ 24.516225] page dumped because: kasan: bad access detected [ 24.516877] [ 24.517090] Memory state around the buggy address: [ 24.517666] ffff8880099ab680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.518503] ffff8880099ab700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.519362] >ffff8880099ab780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.520211] ^ [ 24.520707] ffff8880099ab800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.521554] ffff8880099ab880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.522402] ================================================================== [ 24.523385] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.420738] BUG: Bad rss-counter state mm:000000001d46b035 type:MM_FILEPAGES val:33 [ 27.421493] BUG: Bad rss-counter state mm:000000001d46b035 type:MM_ANONPAGES val:22 [ 27.880624] BUG: Bad rss-counter state mm:000000008f555ee6 type:MM_FILEPAGES val:33 [ 27.881388] BUG: Bad rss-counter state mm:000000008f555ee6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51432' (ECDSA) to the list of known hosts. 2023/06/20 17:53:29 fuzzer started 2023/06/20 17:53:29 dialing manager at localhost:36067 2023/06/20 17:53:29 checking machine... 2023/06/20 17:53:29 checking revisions... [ 28.625379] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:53:29 testing simple program... [ 28.670354] cgroup: Unknown subsys name 'net' [ 28.728744] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:53:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=1ffff1100d9c1354 RSI=ffff88806ce09ff0 RDI=ffff88806ce09aa0 RBP=ffff88806ce09ff0 RSP=ffff88806ce099f0 R8 =ffffffff860a1444 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88806ce09ff8 R15=ffff88806ce09a98 RIP=ffffffff81130445 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 00007f116a0a7900 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=00007f116a65e618 CR3=000000000e7a8000 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=1ffff11002024aa1 RBX=ffff8880101254c8 RCX=ffffffff816e6cd4 RDX=ffff888015e93680 RSI=0000000000000017 RDI=0000000000000030 RBP=dffffc0000000000 RSP=ffff888019f97bf8 R8 =0000000000000006 R9 =000000000000003a R10=0000000000000031 R11=00000000000b6a61 R12=0000000000000031 R13=0000000000000030 R14=ffff88800e253000 R15=0000000000000017 RIP=ffffffff814c0378 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 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=00007fc4d6979260 CR3=000000000df06000 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=756e696c2d34365f3638782f62696c2f XMM01=732e747079726362696c2f756e672d78 XMM02=00312e6f732e747079726362696c2f75 XMM03=6e672d78756e696c2d34365f3638782f XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000