[ 38.398766] BUG: Bad rss-counter state mm:000000005f2bf920 type:MM_FILEPAGES val:33 [ 38.399886] BUG: Bad rss-counter state mm:000000005f2bf920 type:MM_ANONPAGES val:22 [ 38.405980] sshd (212) used greatest stack depth: 23992 bytes left [ 38.571739] ================================================================== [ 38.572787] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.573810] Read of size 8 at addr ffff88800fc404e0 by task sshd/219 [ 38.574812] [ 38.575070] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.576100] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.577264] Call Trace: [ 38.577646] [ 38.577982] dump_stack_lvl+0x91/0xf0 [ 38.578564] print_report+0xcc/0x620 [ 38.579130] ? __virt_addr_valid+0x102/0x340 [ 38.579774] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.580483] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.581142] kasan_report+0xbe/0xf0 [ 38.581652] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.582320] vma_interval_tree_remove+0xc75/0xec0 [ 38.582972] vma_prepare+0xc54/0x11a0 [ 38.583483] __split_vma+0x5af/0x950 [ 38.584022] ? __pfx___split_vma+0x10/0x10 [ 38.584585] ? find_held_lock+0x2c/0x110 [ 38.585141] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.585745] ? lock_is_held_type+0x9f/0x120 [ 38.586324] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.586977] ? mtree_range_walk+0x632/0x900 [ 38.587570] ? mas_walk+0x5c7/0x7c0 [ 38.588082] do_vmi_munmap+0x1f1/0x2b0 [ 38.588608] mmap_region+0x1f9/0x2660 [ 38.589123] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.589689] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.590493] ? __pfx_lock_acquire+0x10/0x10 [ 38.591084] ? __pfx_mmap_region+0x10/0x10 [ 38.591680] ? security_mmap_addr+0x7d/0xa0 [ 38.592295] ? get_unmapped_area+0x1f5/0x3f0 [ 38.592913] do_mmap+0x854/0xf00 [ 38.593405] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.593962] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.594593] ksys_mmap_pgoff+0x3af/0x500 [ 38.595164] do_syscall_64+0x3f/0x90 [ 38.595699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.596448] RIP: 0033:0x7fd1d9263d82 [ 38.596963] 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 [ 38.599366] RSP: 002b:00007ffe4af7ef88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.600400] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1d9263d82 [ 38.601359] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1d869d000 [ 38.602321] RBP: 00007fd1d869d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.603285] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae6e7a7f70 [ 38.604259] R13: 00007ffe4af7efa0 R14: 00007ffe4af7efd0 R15: 00007ffe4af7f330 [ 38.605240] [ 38.605574] [ 38.605818] Allocated by task 212: [ 38.606300] kasan_save_stack+0x22/0x50 [ 38.606868] kasan_set_track+0x25/0x30 [ 38.607431] __kasan_slab_alloc+0x59/0x70 [ 38.608051] kmem_cache_alloc+0x16b/0x370 [ 38.608638] vm_area_dup+0x20/0x160 [ 38.609157] __split_vma+0x170/0x950 [ 38.609688] split_vma+0xc6/0x110 [ 38.610192] mprotect_fixup+0x8d2/0xb30 [ 38.610769] do_mprotect_pkey+0x87e/0xd40 [ 38.611367] __x64_sys_mprotect+0x78/0xc0 [ 38.611975] do_syscall_64+0x3f/0x90 [ 38.612507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.613238] [ 38.613490] Freed by task 212: [ 38.613938] kasan_save_stack+0x22/0x50 [ 38.614510] kasan_set_track+0x25/0x30 [ 38.615075] kasan_save_free_info+0x2b/0x50 [ 38.615689] __kasan_slab_free+0x10a/0x190 [ 38.616308] kmem_cache_free+0x10d/0x4d0 [ 38.616895] rcu_core+0x8c8/0x2860 [ 38.617408] __do_softirq+0x1b7/0x7d4 [ 38.617961] [ 38.618211] Last potentially related work creation: [ 38.618878] kasan_save_stack+0x22/0x50 [ 38.619457] __kasan_record_aux_stack+0x8e/0xa0 [ 38.620142] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.620880] remove_vma+0x139/0x170 [ 38.621407] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.622051] do_vmi_munmap+0x1f1/0x2b0 [ 38.622615] __vm_munmap+0x138/0x3a0 [ 38.623151] __x64_sys_munmap+0x59/0x80 [ 38.623682] do_syscall_64+0x3f/0x90 [ 38.624177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.624971] [ 38.625273] The buggy address belongs to the object at ffff88800fc40488 [ 38.625273] which belongs to the cache vm_area_struct of size 168 [ 38.627027] The buggy address is located 88 bytes inside of [ 38.627027] freed 168-byte region [ffff88800fc40488, ffff88800fc40530) [ 38.628685] [ 38.628935] The buggy address belongs to the physical page: [ 38.629703] page:00000000e4808d25 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc40 [ 38.630970] memcg:ffff88800fc41001 [ 38.631465] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.632229] page_type: 0xffffffff() [ 38.632761] raw: 0100000000000200 ffff88800879fc80 ffffea000032cb40 dead000000000004 [ 38.633837] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc41001 [ 38.634905] page dumped because: kasan: bad access detected [ 38.635642] [ 38.635859] Memory state around the buggy address: [ 38.636477] ffff88800fc40380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.637470] ffff88800fc40400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.638480] >ffff88800fc40480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.639472] ^ [ 38.640271] ffff88800fc40500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.641192] ffff88800fc40580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.642210] ================================================================== [ 38.643376] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 40.874107] BUG: Bad rss-counter state mm:000000002f997bb7 type:MM_FILEPAGES val:33 [ 40.875606] BUG: Bad rss-counter state mm:000000002f997bb7 type:MM_ANONPAGES val:22 [ 41.397735] BUG: Bad rss-counter state mm:0000000088619a76 type:MM_FILEPAGES val:33 [ 41.398778] BUG: Bad rss-counter state mm:0000000088619a76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8110' (ECDSA) to the list of known hosts. 2023/06/20 05:48:52 fuzzer started 2023/06/20 05:48:53 dialing manager at localhost:44161 2023/06/20 05:48:53 checking machine... 2023/06/20 05:48:53 checking revisions... [ 42.073216] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:48:53 testing simple program... [ 42.125578] cgroup: Unknown subsys name 'net' [ 42.204268] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:48:38 Registers: info registers vcpu 0 RAX=0000000000000ff0 RBX=00005652caac5740 RCX=000000000000fff0 RDX=0000000000000000 RSI=00005652caac5770 RDI=00005652caab4ce0 RBP=00005652caab4ce0 RSP=00007ffefbff8ac8 R8 =0000000000000001 R9 =0000000000000000 R10=00007f63871e4ac0 R11=00007f63871e53c0 R12=00005652caacced0 R13=00007f6386c7f6f8 R14=0000000000000400 R15=00005652caac5770 RIP=00007f63871ce3ad RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6386c7f900 00000000 00000000 GS =0000 0000000000000000 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=00007f63872370b0 CR3=000000000f2ba000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005600746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=000055e7939d6e74 CR3=0000000018162000 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=38343a3530203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383233 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000