Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.646521] BUG: Bad rss-counter state mm:000000009969be60 type:MM_FILEPAGES val:33 [ 36.647514] BUG: Bad rss-counter state mm:000000009969be60 type:MM_ANONPAGES val:22 [ 36.834779] ================================================================== [ 36.835709] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.836677] Read of size 8 at addr ffff88800911ded8 by task sshd/218 [ 36.837558] [ 36.837788] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.838675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.839685] Call Trace: [ 36.840007] [ 36.840303] dump_stack_lvl+0x91/0xf0 [ 36.840809] print_report+0xcc/0x620 [ 36.841361] ? __virt_addr_valid+0x102/0x340 [ 36.841921] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.842558] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.843172] kasan_report+0xbe/0xf0 [ 36.843675] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.844338] vma_interval_tree_remove+0xc75/0xec0 [ 36.844974] vma_prepare+0xc54/0x11a0 [ 36.845501] __split_vma+0x5af/0x950 [ 36.845997] ? __pfx___split_vma+0x10/0x10 [ 36.846573] ? find_held_lock+0x2c/0x110 [ 36.847133] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.847753] ? lock_is_held_type+0x9f/0x120 [ 36.848341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.848986] ? mtree_range_walk+0x632/0x900 [ 36.849614] ? mas_walk+0x5c7/0x7c0 [ 36.850109] do_vmi_munmap+0x1f1/0x2b0 [ 36.850639] mmap_region+0x1f9/0x2660 [ 36.851149] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.851699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.852483] ? __pfx_lock_acquire+0x10/0x10 [ 36.853059] ? __pfx_mmap_region+0x10/0x10 [ 36.853644] ? security_mmap_addr+0x7d/0xa0 [ 36.854205] ? get_unmapped_area+0x1f5/0x3f0 [ 36.854938] do_mmap+0x854/0xf00 [ 36.855439] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.855960] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.856565] ksys_mmap_pgoff+0x3af/0x500 [ 36.857112] do_syscall_64+0x3f/0x90 [ 36.857655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.858348] RIP: 0033:0x7f4914984d82 [ 36.858827] 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 [ 36.861137] RSP: 002b:00007ffd0e91cac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.862113] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4914984d82 [ 36.863027] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4913dbe000 [ 36.863941] RBP: 00007f4913dbe000 R08: 0000000000000009 R09: 0000000000001000 [ 36.864853] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b50344f70 [ 36.865782] R13: 00007ffd0e91cae0 R14: 00007ffd0e91cb10 R15: 00007ffd0e91ce70 [ 36.866717] [ 36.867027] [ 36.867256] Allocated by task 211: [ 36.867728] kasan_save_stack+0x22/0x50 [ 36.868265] kasan_set_track+0x25/0x30 [ 36.868793] __kasan_slab_alloc+0x59/0x70 [ 36.869375] kmem_cache_alloc+0x16b/0x370 [ 36.869921] vm_area_dup+0x20/0x160 [ 36.870415] __split_vma+0x170/0x950 [ 36.870910] split_vma+0xc6/0x110 [ 36.871418] mprotect_fixup+0x8d2/0xb30 [ 36.871954] do_mprotect_pkey+0x87e/0xd40 [ 36.872520] __x64_sys_mprotect+0x78/0xc0 [ 36.873089] do_syscall_64+0x3f/0x90 [ 36.873601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.874291] [ 36.874526] Freed by task 211: [ 36.874947] kasan_save_stack+0x22/0x50 [ 36.875500] kasan_set_track+0x25/0x30 [ 36.876019] kasan_save_free_info+0x2b/0x50 [ 36.876750] __kasan_slab_free+0x10a/0x190 [ 36.877539] kmem_cache_free+0x10d/0x4d0 [ 36.878224] rcu_core+0x8c8/0x2860 [ 36.878842] __do_softirq+0x1b7/0x7d4 [ 36.879510] [ 36.879806] Last potentially related work creation: [ 36.880618] kasan_save_stack+0x22/0x50 [ 36.881343] __kasan_record_aux_stack+0x8e/0xa0 [ 36.882033] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.882742] remove_vma+0x139/0x170 [ 36.883223] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.883827] do_vmi_munmap+0x1f1/0x2b0 [ 36.884345] __vm_munmap+0x138/0x3a0 [ 36.884837] __x64_sys_munmap+0x59/0x80 [ 36.885387] do_syscall_64+0x3f/0x90 [ 36.885880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.886585] [ 36.886816] The buggy address belongs to the object at ffff88800911de80 [ 36.886816] which belongs to the cache vm_area_struct of size 168 [ 36.888388] The buggy address is located 88 bytes inside of [ 36.888388] freed 168-byte region [ffff88800911de80, ffff88800911df28) [ 36.889929] [ 36.890156] The buggy address belongs to the physical page: [ 36.890879] page:00000000fc1c81e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x911d [ 36.892041] memcg:ffff88800d2bea01 [ 36.892510] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.893256] page_type: 0xffffffff() [ 36.893745] raw: 0100000000000200 ffff88800879fc80 ffffea0000269100 dead000000000005 [ 36.894736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2bea01 [ 36.895723] page dumped because: kasan: bad access detected [ 36.896438] [ 36.896667] Memory state around the buggy address: [ 36.897306] ffff88800911dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.898208] ffff88800911de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.899138] >ffff88800911de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.900076] ^ [ 36.900861] ffff88800911df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 36.901797] ffff88800911df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.902716] ================================================================== [ 36.903753] Disabling lock debugging due to kernel taint [ 39.046962] BUG: Bad rss-counter state mm:00000000cb7a1ca9 type:MM_FILEPAGES val:33 [ 39.048382] BUG: Bad rss-counter state mm:00000000cb7a1ca9 type:MM_ANONPAGES val:22 [ 39.520881] BUG: Bad rss-counter state mm:000000007795263c type:MM_FILEPAGES val:33 [ 39.522086] BUG: Bad rss-counter state mm:000000007795263c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6871' (ECDSA) to the list of known hosts. 2023/06/20 01:14:47 fuzzer started 2023/06/20 01:14:47 dialing manager at localhost:44161 2023/06/20 01:14:47 checking machine... 2023/06/20 01:14:47 checking revisions... [ 40.261254] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:14:47 testing simple program... [ 40.311644] cgroup: Unknown subsys name 'net' [ 40.400682] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:14:42 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=ffff888008c58000 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=00007fd92f379680 CR3=000000000d5aa000 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=5a669d5341fc298e7b43b6905a640ca2 XMM02=000000000011d940eff9b2d0a8fce9cb XMM03=000000000011da102c67c8bc2e329bc3 XMM04=305de13ae3d602fa00000000000ae988 XMM05=751b9502027dc0b90000000000133c30 XMM06=fe080adc390805970000000000132e08 XMM07=e042d86d42eb936e0000000000124628 XMM08=96558e3eeeb0a6a4000000000011da10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800fdfca40 RCX=0000000000010000 RDX=1ffff11002e477d4 RSI=00000000000f1b82 RDI=ffff88801723bea0 RBP=ffff88801723b680 RSP=ffff88806cf096e0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000017a12a7544 R12=00000000000f1b82 R13=0000000000000003 R14=ffff88806cf09948 R15=dffffc0000000000 RIP=ffffffff812992d7 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 00007f46d052a900 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=00007ffe7a4bc000 CR3=000000001c82c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000