[ 41.256646] BUG: Bad rss-counter state mm:00000000210a1b0a type:MM_FILEPAGES val:33 [ 41.258059] BUG: Bad rss-counter state mm:00000000210a1b0a type:MM_ANONPAGES val:22 [ 41.409345] ================================================================== [ 41.410255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.411197] Read of size 8 at addr ffff88800dc5d228 by task sshd/218 [ 41.411983] [ 41.412198] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.413254] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.414229] Call Trace: [ 41.414558] [ 41.414857] dump_stack_lvl+0x91/0xf0 [ 41.415370] print_report+0xcc/0x620 [ 41.415857] ? __virt_addr_valid+0x102/0x340 [ 41.416421] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.417045] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.417658] kasan_report+0xbe/0xf0 [ 41.418136] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.418757] vma_interval_tree_remove+0xc75/0xec0 [ 41.419372] vma_prepare+0xc54/0x11a0 [ 41.419852] __split_vma+0x5af/0x950 [ 41.420328] ? __pfx___split_vma+0x10/0x10 [ 41.420855] ? find_held_lock+0x2c/0x110 [ 41.421382] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.421949] ? lock_is_held_type+0x9f/0x120 [ 41.422493] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.423102] ? mtree_range_walk+0x632/0x900 [ 41.423663] ? mas_walk+0x5c7/0x7c0 [ 41.424140] do_vmi_munmap+0x1f1/0x2b0 [ 41.424634] mmap_region+0x1f9/0x2660 [ 41.425119] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.425638] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.426342] ? __pfx_lock_acquire+0x10/0x10 [ 41.426872] ? __pfx_mmap_region+0x10/0x10 [ 41.427429] ? security_mmap_addr+0x7d/0xa0 [ 41.427964] ? get_unmapped_area+0x1f5/0x3f0 [ 41.428514] do_mmap+0x854/0xf00 [ 41.428962] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.429464] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.430034] ksys_mmap_pgoff+0x3af/0x500 [ 41.430552] do_syscall_64+0x3f/0x90 [ 41.431038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.431700] RIP: 0033:0x7f0bccd99d82 [ 41.432163] 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 [ 41.434309] RSP: 002b:00007ffef5418d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.435212] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0bccd99d82 [ 41.436079] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0bcc1d3000 [ 41.436924] RBP: 00007f0bcc1d3000 R08: 0000000000000009 R09: 0000000000001000 [ 41.437772] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561bd0607ec0 [ 41.438613] R13: 00007ffef5418da0 R14: 00007ffef5418dd0 R15: 00007ffef5419130 [ 41.439480] [ 41.439773] [ 41.439989] Allocated by task 211: [ 41.440410] kasan_save_stack+0x22/0x50 [ 41.440911] kasan_set_track+0x25/0x30 [ 41.441399] __kasan_slab_alloc+0x59/0x70 [ 41.441923] kmem_cache_alloc+0x16b/0x370 [ 41.442436] vm_area_dup+0x20/0x160 [ 41.442885] __split_vma+0x170/0x950 [ 41.443358] split_vma+0xc6/0x110 [ 41.443800] mprotect_fixup+0x8d2/0xb30 [ 41.444298] do_mprotect_pkey+0x87e/0xd40 [ 41.444826] __x64_sys_mprotect+0x78/0xc0 [ 41.445344] do_syscall_64+0x3f/0x90 [ 41.445815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.446456] [ 41.446671] Freed by task 211: [ 41.447065] kasan_save_stack+0x22/0x50 [ 41.447591] kasan_set_track+0x25/0x30 [ 41.448083] kasan_save_free_info+0x2b/0x50 [ 41.448615] __kasan_slab_free+0x10a/0x190 [ 41.449154] kmem_cache_free+0x10d/0x4d0 [ 41.449668] rcu_core+0x8c8/0x2860 [ 41.450111] __do_softirq+0x1b7/0x7d4 [ 41.450589] [ 41.450805] Last potentially related work creation: [ 41.451391] kasan_save_stack+0x22/0x50 [ 41.451897] __kasan_record_aux_stack+0x8e/0xa0 [ 41.452476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.453121] remove_vma+0x139/0x170 [ 41.453577] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.454221] do_vmi_munmap+0x1f1/0x2b0 [ 41.454709] __vm_munmap+0x138/0x3a0 [ 41.455178] __x64_sys_munmap+0x59/0x80 [ 41.455695] do_syscall_64+0x3f/0x90 [ 41.456170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.456805] [ 41.457021] The buggy address belongs to the object at ffff88800dc5d1d0 [ 41.457021] which belongs to the cache vm_area_struct of size 168 [ 41.458471] The buggy address is located 88 bytes inside of [ 41.458471] freed 168-byte region [ffff88800dc5d1d0, ffff88800dc5d278) [ 41.459871] [ 41.460084] The buggy address belongs to the physical page: [ 41.460744] page:00000000f83d7237 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc5d [ 41.461823] memcg:ffff88800eb58e01 [ 41.462251] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.462892] page_type: 0xffffffff() [ 41.463358] raw: 0100000000000200 ffff88800879fc80 ffffea0000379b80 dead000000000002 [ 41.464299] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb58e01 [ 41.465215] page dumped because: kasan: bad access detected [ 41.465890] [ 41.466102] Memory state around the buggy address: [ 41.466685] ffff88800dc5d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.467552] ffff88800dc5d180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.468406] >ffff88800dc5d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.469259] ^ [ 41.469814] ffff88800dc5d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 41.470674] ffff88800dc5d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 41.471534] ================================================================== [ 41.472522] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 43.091360] BUG: Bad rss-counter state mm:000000002146c7ad type:MM_FILEPAGES val:33 [ 43.092279] BUG: Bad rss-counter state mm:000000002146c7ad type:MM_ANONPAGES val:22 [ 43.541257] BUG: Bad rss-counter state mm:00000000669c504c type:MM_FILEPAGES val:33 [ 43.542494] BUG: Bad rss-counter state mm:00000000669c504c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18308' (ECDSA) to the list of known hosts. 2023/06/19 12:22:09 fuzzer started 2023/06/19 12:22:09 dialing manager at localhost:44161 2023/06/19 12:22:09 checking machine... 2023/06/19 12:22:09 checking revisions... [ 44.233181] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:22:09 testing simple program... [ 44.285105] cgroup: Unknown subsys name 'net' [ 44.344665] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:21:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d72450 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888008d72454 RBP=1ffff1100d9c1396 RSP=ffff88806ce09ca8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=1ffff1100d9c7479 R12=0000000000000083 R13=ffff888008d72450 R14=0000000000000003 R15=dffffc0000000000 RIP=ffffffff812e0005 RFL=00000016 [----AP-] 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 00007f9d134d7700 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=00007fde3c81a038 CR3=000000000e448000 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=ec6d60a2f1d3b2ac444ec9b241cc8b37 XMM02=000000000011dd70eff9b2d0a8fce9cb XMM03=000000000011de402c67c8bc2e329bc3 XMM04=72d6ce7fcfdfb3d200000000000ae988 XMM05=6c94b7c0713ab0330000000000134dc0 XMM06=751b9502027dc0b900000000001338b0 XMM07=fb795ef6d65770560000000000123fe8 XMM08=2c67c8bc2e329bc3000000000011dde0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800ce012b8 RBX=ffff88800cd5b9e8 RCX=1ffff11001926bb6 RDX=dffffc0000000000 RSI=ffff88800cd44830 RDI=ffff88800cd5ba18 RBP=ffff88800d2f32d8 RSP=ffff88800fc97c08 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800cd44820 R13=0000000000000000 R14=ffff888016748048 R15=ffff888016748000 RIP=ffffffff81847508 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 00007f94091a9900 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=00007f9409760618 CR3=000000001a29a000 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