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Thu, 25 Feb 2021 20:52:54 +0000 Received: by smtp401.mail.gq1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 8391eb5841c4a403e2246c91eb94db22; Thu, 25 Feb 2021 20:52:50 +0000 (UTC) Subject: Re: WARNING: CPU: 3 PID: 2548 at fs/btrfs/transaction.c:537 start_transaction+0x489/0x4f0 To: fdmanana@gmail.com Cc: linux-btrfs , Chris Mason , Josef Bacik , David Sterba , Casey Schaufler References: <434d856f-bd7b-4889-a6ec-e81aaebfa735.ref@schaufler-ca.com> <434d856f-bd7b-4889-a6ec-e81aaebfa735@schaufler-ca.com> From: Casey Schaufler Message-ID: <9ba197d9-b8f1-9f59-430d-dcc52973444c@schaufler-ca.com> Date: Thu, 25 Feb 2021 12:52:49 -0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Content-Language: en-US X-Mailer: WebService/1.1.17828 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Apache-HttpAsyncClient/4.1.4 (Java/11.0.9.1) Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 2/25/2021 12:39 PM, Filipe Manana wrote: > On Thu, Feb 25, 2021 at 7:52 PM Casey Schaufler wrote: >> I recently upgraded a Smack based system to Fedora33. I now get >> this stack trace on a regular basis. The system appears to be >> functioning correctly, but I find the warning worrisome. > You have SELinux enabled I suppose. No, I have Smack enabled, per the stack trace. > > Try the following patch: > > https://pastebin.com/HXYCxyTD > > And yes, the warning in this context, should cause no harm. OK, thanks. I shan't worry about it any further. > > Thanks. > >> >> [ 220.732359] ------------[ cut here ]------------ >> [ 220.732398] WARNING: CPU: 3 PID: 2548 at fs/btrfs/transaction.c:537= start_transaction+0x489/0x4f0 >> [ 220.732400] Modules linked in: nft_objref nf_conntrack_netbios_ns n= f_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_= reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat= ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat = nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_= raw iptable_security ip_set nf_tables nfnetlink ip6table_filter rfkill ip= 6_tables iptable_filter bpfilter sunrpc snd_hda_codec_generic ledtrig_aud= io snd_hda_intel snd_intel_dspcfg snd_hda_codec intel_rapl_msr intel_rapl= _common snd_hda_core kvm_intel snd_hwdep snd_seq snd_seq_device snd_pcm s= nd_timer i2c_i801 i2c_smbus snd kvm virtio_balloon soundcore iTCO_wdt int= el_pmc_bxt iTCO_vendor_support lpc_ich irqbypass zram ip_tables crct10dif= _pclmul crc32_pclmul qxl crc32c_intel drm_ttm_helper ttm drm_kms_helper c= ec drm ghash_clmulni_intel serio_raw virtio_console virtio_net net_failov= er virtio_blk failover qemu_fw_cfg fuse >> [ 220.732439] CPU: 3 PID: 2548 Comm: mkdir Not tainted 5.9.0-rc2smack= + #81 >> [ 220.732441] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIO= S 1.13.0-2.fc32 04/01/2014 >> [ 220.732444] RIP: 0010:start_transaction+0x489/0x4f0 >> [ 220.732447] Code: e9 be fc ff ff be 03 00 00 00 4c 89 ff e8 3f b6 0= 5 00 85 c0 0f 84 8a fc ff ff c7 44 24 0c 00 00 00 00 4c 63 e0 e9 34 ff ff= ff <0f> 0b e9 c7 fb ff ff be 02 00 00 00 e8 86 72 17 00 e9 f0 fb ff ff >> [ 220.732449] RSP: 0018:ffffc90001887d10 EFLAGS: 00010202 >> [ 220.732452] RAX: ffff88816f1e0000 RBX: 0000000000000201 RCX: 000000= 0000000003 >> [ 220.732454] RDX: 0000000000000201 RSI: 0000000000000002 RDI: ffff88= 8177849000 >> [ 220.732456] RBP: ffff888177849000 R08: 0000000000000001 R09: 000000= 0000000004 >> [ 220.732458] R10: ffffffff825e8f7a R11: 0000000000000003 R12: ffffff= ffffffffe2 >> [ 220.732460] R13: 0000000000000000 R14: ffff88803d884270 R15: ffff88= 81680d8000 >> [ 220.732463] FS: 00007f67317b8440(0000) GS:ffff88817bcc0000(0000) k= nlGS:0000000000000000 >> [ 220.732465] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> [ 220.732467] CR2: 00007f67247a22a8 CR3: 000000004bfbc002 CR4: 000000= 0000370ee0 >> [ 220.732472] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000= 0000000000 >> [ 220.732474] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 000000= 0000000400 >> [ 220.732475] Call Trace: >> [ 220.732480] ? slab_free_freelist_hook+0xea/0x1b0 >> [ 220.732483] ? trace_hardirqs_on+0x1c/0xe0 >> [ 220.732490] btrfs_setxattr_trans+0x3c/0xf0 >> [ 220.732496] __vfs_setxattr+0x63/0x80 >> [ 220.732502] smack_d_instantiate+0x2d3/0x360 >> [ 220.732507] security_d_instantiate+0x29/0x40 >> [ 220.732511] d_instantiate_new+0x38/0x90 >> [ 220.732515] btrfs_mkdir+0x1cf/0x1e0 >> [ 220.732521] vfs_mkdir+0x14f/0x200 >> [ 220.732525] do_mkdirat+0x6d/0x110 >> [ 220.732531] do_syscall_64+0x2d/0x40 >> [ 220.732534] entry_SYSCALL_64_after_hwframe+0x44/0xa9 >> [ 220.732537] RIP: 0033:0x7f673196ae6b >> [ 220.732540] Code: 8b 05 11 20 0d 00 41 bc ff ff ff ff 64 c7 00 16 0= 0 00 00 e9 37 ff ff ff e8 d2 f3 01 00 66 90 f3 0f 1e fa b8 53 00 00 00 0f= 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d dd 1f 0d 00 f7 d8 64 89 01 48 >> [ 220.732542] RSP: 002b:00007ffc3c679b18 EFLAGS: 00000246 ORIG_RAX: 0= 000000000000053 >> [ 220.732545] RAX: ffffffffffffffda RBX: 00000000000001ff RCX: 00007f= 673196ae6b >> [ 220.732547] RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007f= fc3c67a30d >> [ 220.732549] RBP: 00007ffc3c67a30d R08: 00000000000001ff R09: 000000= 0000000000 >> [ 220.732551] R10: 000055d3e39fe930 R11: 0000000000000246 R12: 000000= 0000000000 >> [ 220.732553] R13: 00007ffc3c679cd8 R14: 00007ffc3c67a30d R15: 00007f= fc3c679ce0 >> [ 220.732563] irq event stamp: 11029 >> [ 220.732566] hardirqs last enabled at (11037): []= console_unlock+0x486/0x670 >> [ 220.732569] hardirqs last disabled at (11044): []= console_unlock+0xa1/0x670 >> [ 220.732572] softirqs last enabled at (8864): [] = asm_call_on_stack+0xf/0x20 >> [ 220.732575] softirqs last disabled at (8851): [] = asm_call_on_stack+0xf/0x20 >> [ 220.732577] ---[ end trace 8f958916039daced ]--- >> >> >