syzkaller login: [ 25.144990] BUG: Bad rss-counter state mm:00000000eca6466a type:MM_FILEPAGES val:33 [ 25.146593] BUG: Bad rss-counter state mm:00000000eca6466a type:MM_ANONPAGES val:22 [ 25.309143] ================================================================== [ 25.310246] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.311255] Read of size 8 at addr ffff88801420fc20 by task sshd/220 [ 25.312090] [ 25.312307] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.313165] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.314157] Call Trace: [ 25.314473] [ 25.314752] dump_stack_lvl+0x91/0xf0 [ 25.315243] print_report+0xcc/0x620 [ 25.315727] ? __virt_addr_valid+0x102/0x340 [ 25.316273] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.316879] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.317498] kasan_report+0xbe/0xf0 [ 25.317993] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.318606] vma_interval_tree_remove+0xc75/0xec0 [ 25.319202] vma_prepare+0xc54/0x11a0 [ 25.319673] __split_vma+0x5af/0x950 [ 25.320134] ? __pfx___split_vma+0x10/0x10 [ 25.320657] ? find_held_lock+0x2c/0x110 [ 25.321167] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.321724] ? lock_is_held_type+0x9f/0x120 [ 25.322259] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.322857] ? mtree_range_walk+0x632/0x900 [ 25.323400] ? mas_walk+0x5c7/0x7c0 [ 25.323865] do_vmi_munmap+0x1f1/0x2b0 [ 25.324351] mmap_region+0x1f9/0x2660 [ 25.324827] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.325328] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.326040] ? __pfx_lock_acquire+0x10/0x10 [ 25.326567] ? __pfx_mmap_region+0x10/0x10 [ 25.327101] ? security_mmap_addr+0x7d/0xa0 [ 25.327629] ? get_unmapped_area+0x1f5/0x3f0 [ 25.328173] do_mmap+0x854/0xf00 [ 25.328609] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.329101] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.329654] ksys_mmap_pgoff+0x3af/0x500 [ 25.330171] do_syscall_64+0x3f/0x90 [ 25.330640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.331277] RIP: 0033:0x7f9dca734d82 [ 25.331730] 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 [ 25.333827] RSP: 002b:00007ffc8fd89528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.334731] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9dca734d82 [ 25.335564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9dc9b6e000 [ 25.336398] RBP: 00007f9dc9b6e000 R08: 0000000000000009 R09: 0000000000001000 [ 25.337238] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561330297f70 [ 25.338089] R13: 00007ffc8fd89540 R14: 00007ffc8fd89570 R15: 00007ffc8fd898d0 [ 25.338933] [ 25.339221] [ 25.339433] Allocated by task 213: [ 25.339858] kasan_save_stack+0x22/0x50 [ 25.340354] kasan_set_track+0x25/0x30 [ 25.340845] __kasan_slab_alloc+0x59/0x70 [ 25.341364] kmem_cache_alloc+0x16b/0x370 [ 25.341878] vm_area_dup+0x20/0x160 [ 25.342330] __split_vma+0x170/0x950 [ 25.342787] split_vma+0xc6/0x110 [ 25.343228] mprotect_fixup+0x8d2/0xb30 [ 25.343723] do_mprotect_pkey+0x87e/0xd40 [ 25.344242] __x64_sys_mprotect+0x78/0xc0 [ 25.344753] do_syscall_64+0x3f/0x90 [ 25.345220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.345872] [ 25.346088] Freed by task 213: [ 25.346478] kasan_save_stack+0x22/0x50 [ 25.346972] kasan_set_track+0x25/0x30 [ 25.347478] kasan_save_free_info+0x2b/0x50 [ 25.348007] __kasan_slab_free+0x10a/0x190 [ 25.348536] kmem_cache_free+0x10d/0x4d0 [ 25.349041] rcu_core+0x8c8/0x2860 [ 25.349477] __do_softirq+0x1b7/0x7d4 [ 25.349955] [ 25.350166] Last potentially related work creation: [ 25.350743] kasan_save_stack+0x22/0x50 [ 25.351236] __kasan_record_aux_stack+0x8e/0xa0 [ 25.351818] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.352452] remove_vma+0x139/0x170 [ 25.352899] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.353455] do_vmi_munmap+0x1f1/0x2b0 [ 25.353951] __vm_munmap+0x138/0x3a0 [ 25.354416] __x64_sys_munmap+0x59/0x80 [ 25.354916] do_syscall_64+0x3f/0x90 [ 25.355387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.356021] [ 25.356233] The buggy address belongs to the object at ffff88801420fbc8 [ 25.356233] which belongs to the cache vm_area_struct of size 168 [ 25.357708] The buggy address is located 88 bytes inside of [ 25.357708] freed 168-byte region [ffff88801420fbc8, ffff88801420fc70) [ 25.359124] [ 25.359340] The buggy address belongs to the physical page: [ 25.359998] page:000000005199bbf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1420f [ 25.361082] memcg:ffff88800eef4901 [ 25.361501] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.362139] page_type: 0xffffffff() [ 25.362581] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.363479] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eef4901 [ 25.364372] page dumped because: kasan: bad access detected [ 25.365034] [ 25.365250] Memory state around the buggy address: [ 25.365818] ffff88801420fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.366674] ffff88801420fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 25.367513] >ffff88801420fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 25.368359] ^ [ 25.368876] ffff88801420fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 25.369713] ffff88801420fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 25.370574] ================================================================== [ 25.371545] Disabling lock debugging due to kernel taint [ 27.251038] BUG: Bad rss-counter state mm:00000000313cc159 type:MM_FILEPAGES val:33 [ 27.252206] BUG: Bad rss-counter state mm:00000000313cc159 type:MM_ANONPAGES val:22 [ 27.792939] BUG: Bad rss-counter state mm:00000000867cdfe1 type:MM_FILEPAGES val:33 [ 27.794144] BUG: Bad rss-counter state mm:00000000867cdfe1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6588' (ECDSA) to the list of known hosts. 2023/06/20 06:33:34 fuzzer started 2023/06/20 06:33:34 dialing manager at localhost:44161 2023/06/20 06:33:34 checking machine... 2023/06/20 06:33:34 checking revisions... [ 28.429373] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:33:34 testing simple program... [ 28.472196] cgroup: Unknown subsys name 'net' [ 28.531659] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:33:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880143c73c0 RCX=ffffffff86120360 RDX=1ffff11002878e78 RSI=ffff8880143c76b0 RDI=ffff8880143c73c0 RBP=ffff8880143c76b0 RSP=ffff8880143c7318 R8 =0000000000000001 R9 =ffff8880143c7400 R10=0000000000038001 R11=000000000001cfe6 R12=0000000000000008 R13=ffff8880143c7408 R14=ffff8880143c76b0 R15=ffff8880143c73c0 RIP=ffffffff81130416 RFL=00000296 [--S-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 00007f7f5519f900 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=00007f7f545e4ea0 CR3=000000000d938000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=597fd2fbe9b8224100000000000ae988 XMM05=42ff3ac546a62ffa00000000001349b8 XMM06=19e9129bd510f23500000000001334e0 XMM07=fb795ef6d657705600000000001239f0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f6f0e83e618 CR3=00000000097ca000 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=33333a3630203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323939 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000