syzkaller login: [ 30.406001] BUG: Bad rss-counter state mm:000000009ba3ce31 type:MM_FILEPAGES val:33 [ 30.407201] BUG: Bad rss-counter state mm:000000009ba3ce31 type:MM_ANONPAGES val:22 [ 30.445085] ================================================================== [ 30.446093] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.447044] Read of size 8 at addr ffff888019b705c8 by task sshd/220 [ 30.447889] [ 30.448118] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.449009] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.449989] Call Trace: [ 30.450308] [ 30.450591] dump_stack_lvl+0x91/0xf0 [ 30.451077] print_report+0xcc/0x620 [ 30.451561] ? __virt_addr_valid+0x102/0x340 [ 30.452122] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.452749] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.453364] kasan_report+0xbe/0xf0 [ 30.453842] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.454457] vma_interval_tree_remove+0xc75/0xec0 [ 30.455063] vma_prepare+0xc54/0x11a0 [ 30.455546] __split_vma+0x5af/0x950 [ 30.456022] ? __pfx___split_vma+0x10/0x10 [ 30.456559] ? find_held_lock+0x2c/0x110 [ 30.457085] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.457650] ? lock_is_held_type+0x9f/0x120 [ 30.458188] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.458801] ? mtree_range_walk+0x632/0x900 [ 30.459361] ? mas_walk+0x5c7/0x7c0 [ 30.459841] do_vmi_munmap+0x1f1/0x2b0 [ 30.460334] mmap_region+0x1f9/0x2660 [ 30.460840] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.461349] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.462076] ? __pfx_lock_acquire+0x10/0x10 [ 30.462618] ? __pfx_mmap_region+0x10/0x10 [ 30.463152] ? security_mmap_addr+0x7d/0xa0 [ 30.463686] ? get_unmapped_area+0x1f5/0x3f0 [ 30.464241] do_mmap+0x854/0xf00 [ 30.464694] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.465201] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.465765] ksys_mmap_pgoff+0x3af/0x500 [ 30.466281] do_syscall_64+0x3f/0x90 [ 30.466766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.467417] RIP: 0033:0x7f1bd8d26d82 [ 30.467873] 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 [ 30.470010] RSP: 002b:00007ffe5c12f7a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.470927] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bd8d26d82 [ 30.471786] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bd8160000 [ 30.472656] RBP: 00007f1bd8160000 R08: 0000000000000009 R09: 0000000000001000 [ 30.473522] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d14294f60 [ 30.474376] R13: 00007ffe5c12f7c0 R14: 00007ffe5c12f7f0 R15: 00007ffe5c12fb50 [ 30.475239] [ 30.475540] [ 30.475753] Allocated by task 213: [ 30.476184] kasan_save_stack+0x22/0x50 [ 30.476702] kasan_set_track+0x25/0x30 [ 30.477200] __kasan_slab_alloc+0x59/0x70 [ 30.477722] kmem_cache_alloc+0x16b/0x370 [ 30.478243] vm_area_dup+0x20/0x160 [ 30.478700] __split_vma+0x170/0x950 [ 30.479170] split_vma+0xc6/0x110 [ 30.479609] mprotect_fixup+0x8d2/0xb30 [ 30.480113] do_mprotect_pkey+0x87e/0xd40 [ 30.480653] __x64_sys_mprotect+0x78/0xc0 [ 30.481183] do_syscall_64+0x3f/0x90 [ 30.481660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.482299] [ 30.482512] Freed by task 213: [ 30.482914] kasan_save_stack+0x22/0x50 [ 30.483422] kasan_set_track+0x25/0x30 [ 30.483917] kasan_save_free_info+0x2b/0x50 [ 30.484461] __kasan_slab_free+0x10a/0x190 [ 30.484999] kmem_cache_free+0x10d/0x4d0 [ 30.485511] rcu_core+0x8c8/0x2860 [ 30.485957] __do_softirq+0x1b7/0x7d4 [ 30.486433] [ 30.486656] Last potentially related work creation: [ 30.487242] kasan_save_stack+0x22/0x50 [ 30.487754] __kasan_record_aux_stack+0x8e/0xa0 [ 30.488325] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.489015] remove_vma+0x139/0x170 [ 30.489481] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.490040] do_vmi_munmap+0x1f1/0x2b0 [ 30.490540] __vm_munmap+0x138/0x3a0 [ 30.491017] __x64_sys_munmap+0x59/0x80 [ 30.491520] do_syscall_64+0x3f/0x90 [ 30.492024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.492672] [ 30.492891] The buggy address belongs to the object at ffff888019b70570 [ 30.492891] which belongs to the cache vm_area_struct of size 168 [ 30.494391] The buggy address is located 88 bytes inside of [ 30.494391] freed 168-byte region [ffff888019b70570, ffff888019b70618) [ 30.495809] [ 30.496025] The buggy address belongs to the physical page: [ 30.496708] page:0000000002dab841 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b70 [ 30.497828] memcg:ffff8880165f9b01 [ 30.498255] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.498918] page_type: 0xffffffff() [ 30.499375] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.500324] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165f9b01 [ 30.501259] page dumped because: kasan: bad access detected [ 30.501941] [ 30.502159] Memory state around the buggy address: [ 30.502743] ffff888019b70480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.503612] ffff888019b70500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.504483] >ffff888019b70580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.505335] ^ [ 30.506025] ffff888019b70600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.506906] ffff888019b70680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.507756] ================================================================== [ 30.508688] Disabling lock debugging due to kernel taint [ 32.459175] BUG: Bad rss-counter state mm:0000000030d85e31 type:MM_FILEPAGES val:33 [ 32.460331] BUG: Bad rss-counter state mm:0000000030d85e31 type:MM_ANONPAGES val:22 [ 32.840648] BUG: Bad rss-counter state mm:00000000a0109b80 type:MM_FILEPAGES val:33 [ 32.841904] BUG: Bad rss-counter state mm:00000000a0109b80 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21497' (ECDSA) to the list of known hosts. 2023/06/21 03:41:58 fuzzer started 2023/06/21 03:41:58 dialing manager at localhost:36067 2023/06/21 03:41:58 checking machine... 2023/06/21 03:41:58 checking revisions... [ 33.536520] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:41:58 testing simple program... [ 33.576200] cgroup: Unknown subsys name 'net' [ 33.643781] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:41:57 Registers: info registers vcpu 0 RAX=1ffff11001ffa213 RBX=ffff88800ffd1068 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ffd1098 RBP=ffff888019594000 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888019594000 R14=ffffffff818d9c06 R15=ffff88800ea66800 RIP=ffffffff818464ec 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 00007fc5433d4900 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=00007fc54398b618 CR3=000000000df36000 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=563412feff00545000000000000080fe 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007f7fbc39b680 CR3=000000000ebb2000 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=2569565b253190994642636ae95142e7 XMM02=000000000011a470eff9b2d0a8fce9cb XMM03=000000000011a5402c67c8bc2e329bc3 XMM04=52b101f1964e7a1400000000000ae988 XMM05=19e9129bd510f2350000000000131780 XMM06=484f1826017be15e00000000001305e8 XMM07=e042d86d42eb936e0000000000121bc8 XMM08=3762416b5f1c7367000000000011a540 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000