syzkaller login: [ 31.414351] BUG: Bad rss-counter state mm:00000000759287ee type:MM_FILEPAGES val:33 [ 31.415672] BUG: Bad rss-counter state mm:00000000759287ee type:MM_ANONPAGES val:22 [ 31.452335] ================================================================== [ 31.453368] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.454308] Read of size 8 at addr ffff888019b95df0 by task sshd/220 [ 31.455082] [ 31.455308] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.456188] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.457171] Call Trace: [ 31.457494] [ 31.457784] dump_stack_lvl+0x91/0xf0 [ 31.458278] print_report+0xcc/0x620 [ 31.458772] ? __virt_addr_valid+0x102/0x340 [ 31.459331] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.459953] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.460566] kasan_report+0xbe/0xf0 [ 31.461042] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.461693] vma_interval_tree_remove+0xc75/0xec0 [ 31.462294] vma_prepare+0xc54/0x11a0 [ 31.462774] __split_vma+0x5af/0x950 [ 31.463244] ? __pfx___split_vma+0x10/0x10 [ 31.463769] ? find_held_lock+0x2c/0x110 [ 31.464288] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.464847] ? lock_is_held_type+0x9f/0x120 [ 31.465396] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.466016] ? mtree_range_walk+0x632/0x900 [ 31.466570] ? mas_walk+0x5c7/0x7c0 [ 31.467048] do_vmi_munmap+0x1f1/0x2b0 [ 31.467554] mmap_region+0x1f9/0x2660 [ 31.468041] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.468549] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.469288] ? __pfx_lock_acquire+0x10/0x10 [ 31.469823] ? __pfx_mmap_region+0x10/0x10 [ 31.470352] ? security_mmap_addr+0x7d/0xa0 [ 31.470881] ? get_unmapped_area+0x1f5/0x3f0 [ 31.471434] do_mmap+0x854/0xf00 [ 31.471872] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.472372] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.472934] ksys_mmap_pgoff+0x3af/0x500 [ 31.473469] do_syscall_64+0x3f/0x90 [ 31.473955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.474604] RIP: 0033:0x7f040f95ad82 [ 31.475069] 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 [ 31.477196] RSP: 002b:00007fffc8dd6288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.478103] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f040f95ad82 [ 31.478957] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f040ed94000 [ 31.479813] RBP: 00007f040ed94000 R08: 0000000000000009 R09: 0000000000001000 [ 31.480818] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558aee40d90 [ 31.481687] R13: 00007fffc8dd62a0 R14: 00007fffc8dd62d0 R15: 00007fffc8dd6630 [ 31.482560] [ 31.482853] [ 31.483068] Allocated by task 213: [ 31.483497] kasan_save_stack+0x22/0x50 [ 31.483999] kasan_set_track+0x25/0x30 [ 31.484489] __kasan_slab_alloc+0x59/0x70 [ 31.485027] kmem_cache_alloc+0x16b/0x370 [ 31.485573] vm_area_dup+0x20/0x160 [ 31.486041] __split_vma+0x170/0x950 [ 31.486518] split_vma+0xc6/0x110 [ 31.486967] mprotect_fixup+0x8d2/0xb30 [ 31.487483] do_mprotect_pkey+0x87e/0xd40 [ 31.488024] __x64_sys_mprotect+0x78/0xc0 [ 31.488556] do_syscall_64+0x3f/0x90 [ 31.489041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.489715] [ 31.489937] Freed by task 213: [ 31.490343] kasan_save_stack+0x22/0x50 [ 31.490865] kasan_set_track+0x25/0x30 [ 31.491370] kasan_save_free_info+0x2b/0x50 [ 31.491920] __kasan_slab_free+0x10a/0x190 [ 31.492471] kmem_cache_free+0x10d/0x4d0 [ 31.492998] rcu_core+0x8c8/0x2860 [ 31.493470] __do_softirq+0x1b7/0x7d4 [ 31.493961] [ 31.494185] Last potentially related work creation: [ 31.494792] kasan_save_stack+0x22/0x50 [ 31.495312] __kasan_record_aux_stack+0x8e/0xa0 [ 31.495902] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.496562] remove_vma+0x139/0x170 [ 31.497027] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.497613] do_vmi_munmap+0x1f1/0x2b0 [ 31.498115] __vm_munmap+0x138/0x3a0 [ 31.498599] __x64_sys_munmap+0x59/0x80 [ 31.499110] do_syscall_64+0x3f/0x90 [ 31.499603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.500274] [ 31.500493] The buggy address belongs to the object at ffff888019b95d98 [ 31.500493] which belongs to the cache vm_area_struct of size 168 [ 31.502034] The buggy address is located 88 bytes inside of [ 31.502034] freed 168-byte region [ffff888019b95d98, ffff888019b95e40) [ 31.503482] [ 31.503705] The buggy address belongs to the physical page: [ 31.504384] page:00000000a022648d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b95 [ 31.505527] memcg:ffff88800c543701 [ 31.505965] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.506634] page_type: 0xffffffff() [ 31.507106] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.508061] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c543701 [ 31.509006] page dumped because: kasan: bad access detected [ 31.509696] [ 31.509921] Memory state around the buggy address: [ 31.510519] ffff888019b95c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.511406] ffff888019b95d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.512299] >ffff888019b95d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.513189] ^ [ 31.514026] ffff888019b95e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.514913] ffff888019b95e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.515791] ================================================================== [ 31.516891] Disabling lock debugging due to kernel taint [ 34.515115] BUG: Bad rss-counter state mm:0000000007d04be8 type:MM_FILEPAGES val:33 [ 34.516197] BUG: Bad rss-counter state mm:0000000007d04be8 type:MM_ANONPAGES val:22 [ 35.033122] BUG: Bad rss-counter state mm:000000002ab1310c type:MM_FILEPAGES val:33 [ 35.034110] BUG: Bad rss-counter state mm:000000002ab1310c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4655' (ECDSA) to the list of known hosts. 2023/06/20 12:47:32 fuzzer started 2023/06/20 12:47:33 dialing manager at localhost:36067 2023/06/20 12:47:33 checking machine... 2023/06/20 12:47:33 checking revisions... [ 35.738833] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:47:33 testing simple program... [ 35.790583] cgroup: Unknown subsys name 'net' [ 35.861211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:47:32 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff81935b66 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff8880142df9a8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=736573203a296e6f R12=ffff888018e9e698 R13=ffff88800ba38000 R14=0000000000000000 R15=0000000000000b79 RIP=ffffffff8180f186 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 00007fa547350700 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=00007ffd151af398 CR3=000000000c6a8000 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=2032333a37343a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a37343a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85dbd7fc RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88806cf099e0 R8 =ffffffff860d8256 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd7f8 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc6b RFL=00000246 [---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 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=00007fd043d07650 CR3=000000000d978000 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=b8ff941a566f36a7d2409858b4523c25 XMM02=2c67c8bc2e329bc3000000000011ba28 XMM03=fb795ef6d65770560000000000122828 XMM04=2d231977229c0b5300000000000ae988 XMM05=19e9129bd510f2350000000000132710 XMM06=4fda316b135da52b0000000000132598 XMM07=e042d86d42eb936e0000000000122aa8 XMM08=d5f3642cd89c3e28000000000011ba88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000