[ 62.542470] BUG: Bad rss-counter state mm:0000000025046ca9 type:MM_FILEPAGES val:33 [ 62.543916] BUG: Bad rss-counter state mm:0000000025046ca9 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 62.708594] ================================================================== [ 62.709655] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.710764] Read of size 8 at addr ffff8880090e2228 by task sshd/225 [ 62.711607] [ 62.711825] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 62.712670] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.713644] Call Trace: [ 62.713959] [ 62.714252] dump_stack_lvl+0x91/0xf0 [ 62.714737] print_report+0xcc/0x620 [ 62.715216] ? __virt_addr_valid+0x102/0x340 [ 62.715760] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.716371] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.716992] kasan_report+0xbe/0xf0 [ 62.717466] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.718085] vma_interval_tree_remove+0xc75/0xec0 [ 62.718688] vma_prepare+0xc54/0x11a0 [ 62.719159] __split_vma+0x5af/0x950 [ 62.719638] ? __pfx___split_vma+0x10/0x10 [ 62.720169] ? find_held_lock+0x2c/0x110 [ 62.720687] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.721251] ? lock_is_held_type+0x9f/0x120 [ 62.721782] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.722405] ? mtree_range_walk+0x632/0x900 [ 62.722951] ? mas_walk+0x5c7/0x7c0 [ 62.723426] do_vmi_munmap+0x1f1/0x2b0 [ 62.723916] mmap_region+0x1f9/0x2660 [ 62.724399] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.724911] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.725616] ? __pfx_lock_acquire+0x10/0x10 [ 62.726153] ? __pfx_mmap_region+0x10/0x10 [ 62.726685] ? security_mmap_addr+0x7d/0xa0 [ 62.727212] ? get_unmapped_area+0x1f5/0x3f0 [ 62.727758] do_mmap+0x854/0xf00 [ 62.728198] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.728690] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.729254] ksys_mmap_pgoff+0x3af/0x500 [ 62.729756] do_syscall_64+0x3f/0x90 [ 62.730257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.730894] RIP: 0033:0x7f2f248c8d82 [ 62.731345] 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 [ 62.733480] RSP: 002b:00007ffcf9a7cc28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.734403] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f248c8d82 [ 62.735259] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f23d02000 [ 62.736104] RBP: 00007f2f23d02000 R08: 0000000000000009 R09: 0000000000001000 [ 62.736946] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be15b10ec0 [ 62.737790] R13: 00007ffcf9a7cc40 R14: 00007ffcf9a7cc70 R15: 00007ffcf9a7cfd0 [ 62.738661] [ 62.738954] [ 62.739173] Allocated by task 218: [ 62.739596] kasan_save_stack+0x22/0x50 [ 62.740098] kasan_set_track+0x25/0x30 [ 62.740589] __kasan_slab_alloc+0x59/0x70 [ 62.741115] kmem_cache_alloc+0x16b/0x370 [ 62.741632] vm_area_dup+0x20/0x160 [ 62.742098] __split_vma+0x170/0x950 [ 62.742562] split_vma+0xc6/0x110 [ 62.742999] mprotect_fixup+0x8d2/0xb30 [ 62.743499] do_mprotect_pkey+0x87e/0xd40 [ 62.744029] __x64_sys_mprotect+0x78/0xc0 [ 62.744549] do_syscall_64+0x3f/0x90 [ 62.745019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.745665] [ 62.745880] Freed by task 19: [ 62.746269] kasan_save_stack+0x22/0x50 [ 62.746773] kasan_set_track+0x25/0x30 [ 62.747264] kasan_save_free_info+0x2b/0x50 [ 62.747794] __kasan_slab_free+0x10a/0x190 [ 62.748328] kmem_cache_free+0x10d/0x4d0 [ 62.748839] rcu_core+0x8c8/0x2860 [ 62.749291] __do_softirq+0x1b7/0x7d4 [ 62.749766] [ 62.749983] Last potentially related work creation: [ 62.750584] kasan_save_stack+0x22/0x50 [ 62.751087] __kasan_record_aux_stack+0x8e/0xa0 [ 62.751661] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.752301] remove_vma+0x139/0x170 [ 62.752749] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.753302] do_vmi_munmap+0x1f1/0x2b0 [ 62.753788] __vm_munmap+0x138/0x3a0 [ 62.754266] __x64_sys_munmap+0x59/0x80 [ 62.754762] do_syscall_64+0x3f/0x90 [ 62.755241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.755877] [ 62.756094] The buggy address belongs to the object at ffff8880090e21d0 [ 62.756094] which belongs to the cache vm_area_struct of size 168 [ 62.757553] The buggy address is located 88 bytes inside of [ 62.757553] freed 168-byte region [ffff8880090e21d0, ffff8880090e2278) [ 62.758959] [ 62.759172] The buggy address belongs to the physical page: [ 62.759831] page:00000000361cb912 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x90e2 [ 62.760912] memcg:ffff88800f04bf01 [ 62.761335] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.761974] page_type: 0xffffffff() [ 62.762428] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 62.763341] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f04bf01 [ 62.764252] page dumped because: kasan: bad access detected [ 62.764911] [ 62.765124] Memory state around the buggy address: [ 62.765700] ffff8880090e2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.766559] ffff8880090e2180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 62.767411] >ffff8880090e2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 62.768258] ^ [ 62.768808] ffff8880090e2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 62.769658] ffff8880090e2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 62.770556] ================================================================== [ 62.771630] Disabling lock debugging due to kernel taint [ 64.723981] BUG: Bad rss-counter state mm:00000000c657fead type:MM_FILEPAGES val:33 [ 64.725164] BUG: Bad rss-counter state mm:00000000c657fead type:MM_ANONPAGES val:22 [ 65.134227] BUG: Bad rss-counter state mm:00000000e9eb8470 type:MM_FILEPAGES val:33 [ 65.135446] BUG: Bad rss-counter state mm:00000000e9eb8470 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40296' (ECDSA) to the list of known hosts. 2023/06/20 14:37:20 fuzzer started 2023/06/20 14:37:20 dialing manager at localhost:36067 2023/06/20 14:37:20 checking machine... 2023/06/20 14:37:20 checking revisions... [ 65.882316] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:37:20 testing simple program... [ 65.926767] cgroup: Unknown subsys name 'net' [ 65.968668] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:37:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc30d86a08 CR3=0000000005482000 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=00007f06cac9d5100000559d54a14790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b3571 RBX=0000000000000001 RCX=ffffffff863b356c RDX=0000000000000000 RSI=1ffffffff0c766ae RDI=ffffffff85fa4f3c RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff863b353c R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000008a95e R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ab1 R15=ffff88806cf09a70 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 00007fcd7d102900 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=00007fcd7d6b9618 CR3=000000001d026000 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=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