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[85.67.117.165]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43cf24707f2sm31043169f8f.26.2026.03.31.12.47.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 31 Mar 2026 12:47:51 -0700 (PDT) Date: Tue, 31 Mar 2026 21:47:49 +0200 From: Gabor Gombas To: Thorsten Leemhuis Cc: Paul Menzel , linux-bluetooth@vger.kernel.org, regressions@lists.linux.dev Subject: Re: Oops with 6.19.10: RIP: 0010:hci_sock_get_channel+0x5/0x20 Message-ID: References: Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Tue, Mar 31, 2026 at 09:07:48AM +0200, Thorsten Leemhuis wrote: > On 3/31/26 08:24, Paul Menzel wrote: > > Am 31.03.26 um 07:17 schrieb Gabor Gombas: > > > > Can you reproduce the issue? If yes, it’d be a great help, if you could > > bisect the issue. > > For instructions see: > https://docs.kernel.org/admin-guide/verify-bugs-and-bisect-regressions.html > or https://docs.kernel.org/admin-guide/bug-bisect.html > > Checking if mainline is affected is also important (the first guide > handles that), as that determines how this needs to be handled. Unfortunately it's unlikely that I would have time for a bisection before the weekend. The bug can be reproduced, I've booted 6.19.10 again, and this time hit the oops after a few minutes. The oops is slightly different, so likely it's some kind of memory corruption. The box in question is running Home Assistant, so it is constantly scanning for Bluetooth devices. I have a 6.19.8 kernel which I've built some time ago but then never used, I've booted it now, we'll see how it fares. Gabor Mar 31 20:29:21 host bluetoothd[810]: Path /org/bleak/66/140584461213584 removed along with Adv Monitor app :1.101 Mar 31 20:29:21 host kernel: BUG: unable to handle page fault for address: 00000000bfaf0372 Mar 31 20:29:21 host kernel: #PF: supervisor read access in kernel mode Mar 31 20:29:21 host kernel: #PF: error_code(0x0000) - not-present page Mar 31 20:29:21 host kernel: PGD 0 P4D 0 Mar 31 20:29:21 host kernel: Oops: Oops: 0000 [#1] SMP PTI Mar 31 20:29:21 host kernel: CPU: 0 UID: 0 PID: 810 Comm: bluetoothd Not tainted 6.19.10-gg #48 PREEMPT(lazy) Mar 31 20:29:21 host kernel: Hardware name: /D54250WYK, BIOS WYLPT10H.86A.0045.2017.0302.2108 03/02/2017 Mar 31 20:29:21 host kernel: RIP: 0010:hci_sock_get_channel+0x5/0x20 Mar 31 20:29:21 host kernel: Code: 0f a3 b7 78 03 00 00 0f 92 c0 c3 cc cc cc cc 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 <0f> b7 87 72 03 00 00 c3 cc cc cc cc 0f 1f 40 00 66 66 2e 0f 1f 84 Mar 31 20:29:21 host kernel: RSP: 0018:ffff9d7201013ad8 EFLAGS: 00010206 Mar 31 20:29:21 host kernel: RAX: 0000000000000000 RBX: ffff93d9887bec00 RCX: 0000000000000002 Mar 31 20:29:21 host kernel: RDX: ffff93d9877fbf00 RSI: 000000000000000d RDI: 00000000bfaf0000 Mar 31 20:29:21 host kernel: RBP: ffffe64e82febc40 R08: ffffffff83b6f7b0 R09: 0000000000000002 Mar 31 20:29:21 host kernel: R10: ffff93d98bda6000 R11: ffff93d985603600 R12: ffff93d98bda6b28 Mar 31 20:29:21 host kernel: R13: 0000000000000003 R14: 000000000000000d R15: ffff93d98bda6b08 Mar 31 20:29:21 host kernel: FS: 00007ff6a4ff2340(0000) GS:ffff93db12797000(0000) knlGS:0000000000000000 Mar 31 20:29:21 host kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Mar 31 20:29:21 host kernel: CR2: 00000000bfaf0372 CR3: 000000010bc9e006 CR4: 00000000001726f0 Mar 31 20:29:21 host kernel: Call Trace: Mar 31 20:29:21 host kernel: Mar 31 20:29:21 host kernel: mgmt_pending_find+0x48/0xa0 Mar 31 20:29:21 host kernel: remove_adv_monitor+0x3b/0x120 Mar 31 20:29:21 host kernel: ? _raw_read_lock+0x13/0x40 Mar 31 20:29:21 host kernel: hci_sock_sendmsg+0x656/0xb40 Mar 31 20:29:21 host kernel: sock_write_iter+0x181/0x190 Mar 31 20:29:21 host kernel: ? ____sys_sendmsg+0x2e5/0x300 Mar 31 20:29:21 host kernel: do_iter_readv_writev+0x139/0x230 Mar 31 20:29:21 host kernel: vfs_writev+0x120/0x3a0 Mar 31 20:29:21 host kernel: ? vfs_read+0x222/0x350 Mar 31 20:29:21 host kernel: ? __seccomp_filter+0x34/0x5b0 Mar 31 20:29:21 host kernel: ? do_writev+0xde/0x110 Mar 31 20:29:21 host kernel: do_writev+0xde/0x110 Mar 31 20:29:21 host kernel: do_syscall_64+0x6c/0xe90 Mar 31 20:29:21 host kernel: ? syscall_exit_work+0x13e/0x1b0 Mar 31 20:29:21 host kernel: ? do_syscall_64+0x8a/0xe90 Mar 31 20:29:21 host kernel: ? syscall_exit_work+0x13e/0x1b0 Mar 31 20:29:21 host kernel: ? do_syscall_64+0x8a/0xe90 Mar 31 20:29:21 host kernel: ? irqentry_exit+0x48/0x530 Mar 31 20:29:21 host kernel: entry_SYSCALL_64_after_hwframe+0x71/0x79 Mar 31 20:29:21 host kernel: RIP: 0033:0x7ff6a54a0e92 Mar 31 20:29:21 host kernel: Code: 18 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 75 1a 83 e2 39 83 fa 08 75 12 e8 2b ff ff ff 0f 1f 00 49 89 ca 48 8b 44 24 20 0f 05 <48> 83 c4 18 c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 10 ff 74 24 18 Mar 31 20:29:21 host kernel: RSP: 002b:00007fff3c414010 EFLAGS: 00000202 ORIG_RAX: 0000000000000014 Mar 31 20:29:21 host kernel: RAX: ffffffffffffffda RBX: 00007fff3c414090 RCX: 00007ff6a54a0e92 Mar 31 20:29:21 host kernel: RDX: 0000000000000001 RSI: 00007fff3c414090 RDI: 0000000000000008 Mar 31 20:29:21 host kernel: RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000 Mar 31 20:29:21 host kernel: R10: 0000000000000000 R11: 0000000000000202 R12: 0000559419ca6e60 Mar 31 20:29:21 host kernel: R13: 0000559419ca8f90 R14: 0000559419cc6cb0 R15: 0000000000000000 Mar 31 20:29:21 host kernel: Mar 31 20:29:21 host kernel: Modules linked in: ip_set tun rfcomm 8021q algif_hash algif_skcipher af_alg bnep uinput kvm_intel iwlmvm kvm at24 irqbypass nls_cp437 regmap_i2c iwlwifi vfat mei_hdcp fat ir_rc6_decoder rc_rc6_mce n> Mar 31 20:29:21 host kernel: CR2: 00000000bfaf0372 Mar 31 20:29:21 host kernel: ---[ end trace 0000000000000000 ]--- Mar 31 20:29:21 host kernel: RIP: 0010:hci_sock_get_channel+0x5/0x20 Mar 31 20:29:21 host kernel: Code: 0f a3 b7 78 03 00 00 0f 92 c0 c3 cc cc cc cc 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 <0f> b7 87 72 03 00 00 c3 cc cc cc cc 0f 1f 40 00 66 66 2e 0f 1f 84 Mar 31 20:29:21 host kernel: RSP: 0018:ffff9d7201013ad8 EFLAGS: 00010206 Mar 31 20:29:21 host kernel: RAX: 0000000000000000 RBX: ffff93d9887bec00 RCX: 0000000000000002 Mar 31 20:29:21 host kernel: RDX: ffff93d9877fbf00 RSI: 000000000000000d RDI: 00000000bfaf0000 Mar 31 20:29:21 host kernel: RBP: ffffe64e82febc40 R08: ffffffff83b6f7b0 R09: 0000000000000002 Mar 31 20:29:21 host kernel: R10: ffff93d98bda6000 R11: ffff93d985603600 R12: ffff93d98bda6b28 Mar 31 20:29:21 host kernel: R13: 0000000000000003 R14: 000000000000000d R15: ffff93d98bda6b08 Mar 31 20:29:21 host kernel: FS: 00007ff6a4ff2340(0000) GS:ffff93db12797000(0000) knlGS:0000000000000000 Mar 31 20:29:21 host kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Mar 31 20:29:21 host kernel: CR2: 00000000bfaf0372 CR3: 000000010bc9e006 CR4: 00000000001726f0