[ 30.674137] BUG: Bad rss-counter state mm:00000000cd84ae6e type:MM_FILEPAGES val:33 [ 30.675134] BUG: Bad rss-counter state mm:00000000cd84ae6e type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.846040] ================================================================== [ 30.846996] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.847972] Read of size 8 at addr ffff88800c580140 by task sshd/218 [ 30.848753] [ 30.848972] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.849976] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.850974] Call Trace: [ 30.851301] [ 30.851587] dump_stack_lvl+0x91/0xf0 [ 30.852128] print_report+0xcc/0x620 [ 30.852629] ? __virt_addr_valid+0x102/0x340 [ 30.853199] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.853831] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854455] kasan_report+0xbe/0xf0 [ 30.854946] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.855570] vma_interval_tree_remove+0xc75/0xec0 [ 30.856176] vma_prepare+0xc54/0x11a0 [ 30.856658] __split_vma+0x5af/0x950 [ 30.857135] ? __pfx___split_vma+0x10/0x10 [ 30.857669] ? find_held_lock+0x2c/0x110 [ 30.858193] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.858759] ? lock_is_held_type+0x9f/0x120 [ 30.859305] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.859906] ? mtree_range_walk+0x632/0x900 [ 30.860487] ? mas_walk+0x5c7/0x7c0 [ 30.860966] do_vmi_munmap+0x1f1/0x2b0 [ 30.861459] mmap_region+0x1f9/0x2660 [ 30.861943] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.862469] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.863198] ? __pfx_lock_acquire+0x10/0x10 [ 30.863738] ? __pfx_mmap_region+0x10/0x10 [ 30.864285] ? security_mmap_addr+0x7d/0xa0 [ 30.864823] ? get_unmapped_area+0x1f5/0x3f0 [ 30.865381] do_mmap+0x854/0xf00 [ 30.865825] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.866330] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.866896] ksys_mmap_pgoff+0x3af/0x500 [ 30.867411] do_syscall_64+0x3f/0x90 [ 30.867894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.868579] RIP: 0033:0x7f47bbc25d82 [ 30.869041] 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 [ 30.871192] RSP: 002b:00007ffee9374d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.872108] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47bbc25d82 [ 30.872969] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47bb05f000 [ 30.873826] RBP: 00007f47bb05f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.874689] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9a9b54ec0 [ 30.875567] R13: 00007ffee9374d80 R14: 00007ffee9374db0 R15: 00007ffee9375110 [ 30.876445] [ 30.876743] [ 30.876956] Allocated by task 211: [ 30.877396] kasan_save_stack+0x22/0x50 [ 30.877909] kasan_set_track+0x25/0x30 [ 30.878406] __kasan_slab_alloc+0x59/0x70 [ 30.878936] kmem_cache_alloc+0x16b/0x370 [ 30.879458] vm_area_dup+0x20/0x160 [ 30.879939] __split_vma+0x170/0x950 [ 30.880405] split_vma+0xc6/0x110 [ 30.880849] mprotect_fixup+0x8d2/0xb30 [ 30.881357] do_mprotect_pkey+0x87e/0xd40 [ 30.881881] __x64_sys_mprotect+0x78/0xc0 [ 30.882411] do_syscall_64+0x3f/0x90 [ 30.882895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.883533] [ 30.883758] Freed by task 211: [ 30.884165] kasan_save_stack+0x22/0x50 [ 30.884662] kasan_set_track+0x25/0x30 [ 30.885154] kasan_save_free_info+0x2b/0x50 [ 30.885684] __kasan_slab_free+0x10a/0x190 [ 30.886223] kmem_cache_free+0x10d/0x4d0 [ 30.886743] rcu_core+0x8c8/0x2860 [ 30.887185] __do_softirq+0x1b7/0x7d4 [ 30.887668] [ 30.887882] Last potentially related work creation: [ 30.888481] kasan_save_stack+0x22/0x50 [ 30.888993] __kasan_record_aux_stack+0x8e/0xa0 [ 30.889568] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.890220] remove_vma+0x139/0x170 [ 30.890673] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.891230] do_vmi_munmap+0x1f1/0x2b0 [ 30.891718] __vm_munmap+0x138/0x3a0 [ 30.892205] __x64_sys_munmap+0x59/0x80 [ 30.892703] do_syscall_64+0x3f/0x90 [ 30.893181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893827] [ 30.894044] The buggy address belongs to the object at ffff88800c5800e8 [ 30.894044] which belongs to the cache vm_area_struct of size 168 [ 30.895510] The buggy address is located 88 bytes inside of [ 30.895510] freed 168-byte region [ffff88800c5800e8, ffff88800c580190) [ 30.896924] [ 30.897149] The buggy address belongs to the physical page: [ 30.897814] page:00000000447f4dac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc580 [ 30.898934] memcg:ffff888019bc4b01 [ 30.899364] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.900040] page_type: 0xffffffff() [ 30.900511] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.901454] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bc4b01 [ 30.902378] page dumped because: kasan: bad access detected [ 30.903043] [ 30.903259] Memory state around the buggy address: [ 30.903860] ffff88800c580000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.904747] ffff88800c580080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.905647] >ffff88800c580100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.906510] ^ [ 30.907150] ffff88800c580180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.908022] ffff88800c580200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.908873] ================================================================== [ 30.909838] Disabling lock debugging due to kernel taint [ 32.850705] BUG: Bad rss-counter state mm:0000000080241171 type:MM_FILEPAGES val:33 [ 32.851476] BUG: Bad rss-counter state mm:0000000080241171 type:MM_ANONPAGES val:22 [ 33.366926] BUG: Bad rss-counter state mm:00000000d227b5f9 type:MM_FILEPAGES val:33 [ 33.368112] BUG: Bad rss-counter state mm:00000000d227b5f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59165' (ECDSA) to the list of known hosts. 2023/06/21 05:35:19 fuzzer started 2023/06/21 05:35:19 dialing manager at localhost:36067 2023/06/21 05:35:19 checking machine... 2023/06/21 05:35:19 checking revisions... [ 34.016831] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:35:19 testing simple program... [ 34.056734] cgroup: Unknown subsys name 'net' [ 34.115051] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:35:18 Registers: info registers vcpu 0 RAX=ffff88800fbe8001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800fbe7c01 RSI=ffff88800fbe7c20 RDI=ffff88800fbe7858 RBP=ffff88800fbe78a0 RSP=ffff88800fbe77d8 R8 =ffffffff861386f2 R9 =ffff88800fbe7888 R10=0000000000038001 R11=0000000000020c51 R12=ffff88800fbe78a8 R13=ffff88800fbe7890 R14=ffff88800fbe7c28 R15=ffff88800fbe7848 RIP=ffffffff81131039 RFL=00000202 [-------] 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 00007f461b0b5900 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=000055943cafa954 CR3=000000000df24000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010002 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888008d951c0 RSI=ffffffff813c7e87 RDI=0000000000000007 RBP=ffff88806cf09db8 RSP=ffff88806cf09cf8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=00000000002aa4fc R13=ffffffffffffffff R14=000000000048ac3c R15=0000000000000000 RIP=ffffffff813c7e8e 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 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=00007fd150458550 CR3=000000000df4c000 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=2038313a35333a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a35333a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000