[ 75.745807] BUG: Bad rss-counter state mm:0000000090283074 type:MM_FILEPAGES val:33 [ 75.747040] BUG: Bad rss-counter state mm:0000000090283074 type:MM_ANONPAGES val:22 [ 75.785853] ================================================================== [ 75.786897] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 75.787915] Read of size 8 at addr ffff88800dcf25c8 by task sshd/219 [ 75.788679] [ 75.788898] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 75.789920] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 75.790917] Call Trace: [ 75.791235] [ 75.791519] dump_stack_lvl+0x91/0xf0 [ 75.792013] print_report+0xcc/0x620 [ 75.792494] ? __virt_addr_valid+0x102/0x340 [ 75.793040] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.793658] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.794289] kasan_report+0xbe/0xf0 [ 75.794763] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.795396] vma_interval_tree_remove+0xc75/0xec0 [ 75.796009] vma_prepare+0xc54/0x11a0 [ 75.796513] __split_vma+0x5af/0x950 [ 75.797006] ? __pfx___split_vma+0x10/0x10 [ 75.797554] ? find_held_lock+0x2c/0x110 [ 75.798098] do_vmi_align_munmap+0x2ba/0x11f0 [ 75.798696] ? lock_is_held_type+0x9f/0x120 [ 75.799273] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 75.799908] ? mtree_range_walk+0x632/0x900 [ 75.800481] ? mas_walk+0x5c7/0x7c0 [ 75.800968] do_vmi_munmap+0x1f1/0x2b0 [ 75.801481] mmap_region+0x1f9/0x2660 [ 75.801977] ? vm_mmap_pgoff+0x15c/0x3a0 [ 75.802518] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 75.803277] ? __pfx_lock_acquire+0x10/0x10 [ 75.803833] ? __pfx_mmap_region+0x10/0x10 [ 75.804382] ? security_mmap_addr+0x7d/0xa0 [ 75.804935] ? get_unmapped_area+0x1f5/0x3f0 [ 75.805516] do_mmap+0x854/0xf00 [ 75.805967] vm_mmap_pgoff+0x1a6/0x3a0 [ 75.806484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 75.807089] ksys_mmap_pgoff+0x3af/0x500 [ 75.807613] do_syscall_64+0x3f/0x90 [ 75.808111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.808783] RIP: 0033:0x7fc8b6f34d82 [ 75.809257] 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 [ 75.811488] RSP: 002b:00007fff1bfe9bc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 75.812442] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8b6f34d82 [ 75.813333] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8b636e000 [ 75.814214] RBP: 00007fc8b636e000 R08: 0000000000000009 R09: 0000000000001000 [ 75.815104] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a77791eb20 [ 75.815983] R13: 00007fff1bfe9be0 R14: 00007fff1bfe9c10 R15: 00007fff1bfe9f70 [ 75.816870] [ 75.817173] [ 75.817395] Allocated by task 212: [ 75.817832] kasan_save_stack+0x22/0x50 [ 75.818353] kasan_set_track+0x25/0x30 [ 75.818880] __kasan_slab_alloc+0x59/0x70 [ 75.819420] kmem_cache_alloc+0x16b/0x370 [ 75.819954] vm_area_dup+0x20/0x160 [ 75.820434] __split_vma+0x170/0x950 [ 75.820919] split_vma+0xc6/0x110 [ 75.821378] mprotect_fixup+0x8d2/0xb30 [ 75.821896] do_mprotect_pkey+0x87e/0xd40 [ 75.822440] __x64_sys_mprotect+0x78/0xc0 [ 75.822984] do_syscall_64+0x3f/0x90 [ 75.823477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.824147] [ 75.824368] Freed by task 212: [ 75.824770] kasan_save_stack+0x22/0x50 [ 75.825289] kasan_set_track+0x25/0x30 [ 75.825809] kasan_save_free_info+0x2b/0x50 [ 75.826359] __kasan_slab_free+0x10a/0x190 [ 75.826928] kmem_cache_free+0x10d/0x4d0 [ 75.827454] rcu_core+0x8c8/0x2860 [ 75.827922] __do_softirq+0x1b7/0x7d4 [ 75.828417] [ 75.828643] Last potentially related work creation: [ 75.829253] kasan_save_stack+0x22/0x50 [ 75.829772] __kasan_record_aux_stack+0x8e/0xa0 [ 75.830370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 75.831051] remove_vma+0x139/0x170 [ 75.831517] do_vmi_align_munmap+0xd4a/0x11f0 [ 75.832100] do_vmi_munmap+0x1f1/0x2b0 [ 75.832600] __vm_munmap+0x138/0x3a0 [ 75.833081] __x64_sys_munmap+0x59/0x80 [ 75.833594] do_syscall_64+0x3f/0x90 [ 75.834081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.834748] [ 75.834996] Second to last potentially related work creation: [ 75.835720] kasan_save_stack+0x22/0x50 [ 75.836256] __kasan_record_aux_stack+0x8e/0xa0 [ 75.836852] __call_rcu_common.constprop.0+0x6a/0xb90 [ 75.837524] remove_vma+0x139/0x170 [ 75.838002] do_vmi_align_munmap+0xd4a/0x11f0 [ 75.838589] do_vmi_munmap+0x1f1/0x2b0 [ 75.839098] mmap_region+0x1f9/0x2660 [ 75.839595] do_mmap+0x854/0xf00 [ 75.840047] vm_mmap_pgoff+0x1a6/0x3a0 [ 75.840557] ksys_mmap_pgoff+0x3af/0x500 [ 75.841080] do_syscall_64+0x3f/0x90 [ 75.841571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.842248] [ 75.842466] The buggy address belongs to the object at ffff88800dcf2570 [ 75.842466] which belongs to the cache vm_area_struct of size 168 [ 75.844024] The buggy address is located 88 bytes inside of [ 75.844024] freed 168-byte region [ffff88800dcf2570, ffff88800dcf2618) [ 75.845497] [ 75.845724] The buggy address belongs to the physical page: [ 75.846420] page:00000000cdc53595 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcf2 [ 75.847569] memcg:ffff88800e245301 [ 75.848015] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 75.848750] page_type: 0xffffffff() [ 75.849226] raw: 0100000000000200 ffff88800879fc80 ffffea000037df80 dead000000000007 [ 75.850195] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e245301 [ 75.851158] page dumped because: kasan: bad access detected [ 75.851858] [ 75.852078] Memory state around the buggy address: [ 75.852691] ffff88800dcf2480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 75.853594] ffff88800dcf2500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 75.854491] >ffff88800dcf2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 75.855405] ^ [ 75.856113] ffff88800dcf2600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 75.857027] ffff88800dcf2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 75.857942] ================================================================== [ 75.859030] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 77.896694] BUG: Bad rss-counter state mm:000000000578b25e type:MM_FILEPAGES val:33 [ 77.897666] BUG: Bad rss-counter state mm:000000000578b25e type:MM_ANONPAGES val:22 [ 78.302300] BUG: Bad rss-counter state mm:00000000576c86a9 type:MM_FILEPAGES val:33 [ 78.303433] BUG: Bad rss-counter state mm:00000000576c86a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23164' (ECDSA) to the list of known hosts. 2023/06/19 20:38:05 fuzzer started 2023/06/19 20:38:06 dialing manager at localhost:44161 2023/06/19 20:38:06 checking machine... 2023/06/19 20:38:06 checking revisions... [ 79.019780] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:38:06 testing simple program... [ 79.072535] cgroup: Unknown subsys name 'net' [ 79.109455] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:37:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffcbb264818 CR3=0000000005482000 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=00007f485af11510000055e67c5d1790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016838001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016837901 RSI=ffff888016837930 RDI=ffff88806cf09aa8 RBP=ffff88806cf09af0 RSP=ffff88806cf09a20 R8 =ffffffff860ab1cc R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000979d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888016837938 R15=ffff88806cf09a98 RIP=ffffffff84532a40 RFL=00000282 [--S----] 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 00007f27d6967900 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=00007f27d6f1f0b0 CR3=000000001ce3a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000