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X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org syzbot has found a reproducer for the following issue on: HEAD commit: a975094bf98c Merge tag 'exfat-for-7.2-rc1' of git://git.ke.. git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master console output: https://syzkaller.appspot.com/x/log.txt?x=146d82fe580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3c66dc15e483c558 dashboard link: https://syzkaller.appspot.com/bug?extid=3ae80219c633aca5431c compiler: aarch64-linux-gnu-gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13d3dd56580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17a9050e580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/fa3fbcfdac58/non_bootable_disk-a975094b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/56fd6dc1b679/vmlinux-a975094b.xz kernel image: https://storage.googleapis.com/syzbot-assets/b1422518a402/Image-a975094b.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3ae80219c633aca5431c@syzkaller.appspotmail.com mtd partition "" doesn't have enough space: 0x8000003 < 0x8000084bb, disabled ------------[ cut here ]------------ WARNING: drivers/mtd/mtdcore.c:719 at add_mtd_device+0x56c/0x14cc drivers/mtd/mtdcore.c:719, CPU#0: syz.2.17/3665 Modules linked in: CPU: 0 UID: 0 PID: 3665 Comm: syz.2.17 Not tainted syzkaller #0 PREEMPT Hardware name: linux,dummy-virt (DT) pstate: 10000005 (nzcV daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : add_mtd_device+0x56c/0x14cc drivers/mtd/mtdcore.c:719 lr : mtd_add_partition+0x218/0x48c drivers/mtd/mtdpart.c:280 sp : ffff8000a2c276f0 x29: ffff8000a2c277b0 x28: ffff0000158a8000 x27: ffff00001ef34004 x26: 1fffe00003de683f x25: ffff00001ef34014 x24: 0000000000000004 x23: ffff00001ef34000 x22: 1ffff00014584f02 x21: 0000000000000000 x20: ffff00001ef341a0 x19: 0000000000000c00 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: ffff80008764b708 x14: 1ffff00010ec96e1 x13: 0000000000000004 x12: ffff700014584ee9 x11: 1ffff00014584ee8 x10: ffff700014584ee8 x9 : dfff800000000000 x8 : ffff8000a2c27747 x7 : 1ffff00014584eea x6 : 0000000041b58ab3 x5 : ffff700014584eea x4 : ffff8000a2c27750 x3 : 1fffe00003de6800 x2 : 0000000000000000 x1 : 0000000000000007 x0 : 0000000000000000 Call trace: add_mtd_device+0x56c/0x14cc drivers/mtd/mtdcore.c:719 (P) mtd_add_partition+0x218/0x48c drivers/mtd/mtdpart.c:280 mtdchar_blkpg_ioctl+0x17c/0x1b8 drivers/mtd/mtdchar.c:562 mtdchar_ioctl+0x2f8/0x1ed8 drivers/mtd/mtdchar.c:1218 mtdchar_unlocked_ioctl+0xa0/0xfc drivers/mtd/mtdchar.c:1241 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x124/0x1a4 fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x74/0x240 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:121 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:140 el0_svc+0x58/0x2a4 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] 0x0 hardirqs last disabled at (0): [] copy_process+0x16a8/0x5700 kernel/fork.c:2232 softirqs last enabled at (0): [] copy_process+0x16c8/0x5700 kernel/fork.c:2233 softirqs last disabled at (0): [<0000000000000000>] 0x0 ---[ end trace 0000000000000000 ]--- --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/ From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f205.google.com (mail-oi1-f205.google.com [209.85.167.205]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BBD47EEB3 for ; 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Sat, 20 Jun 2026 02:10:25 -0700 (PDT) Date: Sat, 20 Jun 2026 02:10:25 -0700 In-Reply-To: <6a364dbc.713c5d62.148f7.0000.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a365901.24bbd9d5.2022ac.0001.GAE@google.com> Subject: Re: [syzbot] [mtd?] WARNING in add_mtd_device From: syzbot To: linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, miquel.raynal@bootlin.com, richard@nod.at, syzkaller-bugs@googlegroups.com, vigneshr@ti.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: a975094bf98c Merge tag 'exfat-for-7.2-rc1' of git://git.ke.. git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master console output: https://syzkaller.appspot.com/x/log.txt?x=146d82fe580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3c66dc15e483c558 dashboard link: https://syzkaller.appspot.com/bug?extid=3ae80219c633aca5431c compiler: aarch64-linux-gnu-gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13d3dd56580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17a9050e580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/fa3fbcfdac58/non_bootable_disk-a975094b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/56fd6dc1b679/vmlinux-a975094b.xz kernel image: https://storage.googleapis.com/syzbot-assets/b1422518a402/Image-a975094b.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3ae80219c633aca5431c@syzkaller.appspotmail.com mtd partition "" doesn't have enough space: 0x8000003 < 0x8000084bb, disabled ------------[ cut here ]------------ WARNING: drivers/mtd/mtdcore.c:719 at add_mtd_device+0x56c/0x14cc drivers/mtd/mtdcore.c:719, CPU#0: syz.2.17/3665 Modules linked in: CPU: 0 UID: 0 PID: 3665 Comm: syz.2.17 Not tainted syzkaller #0 PREEMPT Hardware name: linux,dummy-virt (DT) pstate: 10000005 (nzcV daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : add_mtd_device+0x56c/0x14cc drivers/mtd/mtdcore.c:719 lr : mtd_add_partition+0x218/0x48c drivers/mtd/mtdpart.c:280 sp : ffff8000a2c276f0 x29: ffff8000a2c277b0 x28: ffff0000158a8000 x27: ffff00001ef34004 x26: 1fffe00003de683f x25: ffff00001ef34014 x24: 0000000000000004 x23: ffff00001ef34000 x22: 1ffff00014584f02 x21: 0000000000000000 x20: ffff00001ef341a0 x19: 0000000000000c00 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: ffff80008764b708 x14: 1ffff00010ec96e1 x13: 0000000000000004 x12: ffff700014584ee9 x11: 1ffff00014584ee8 x10: ffff700014584ee8 x9 : dfff800000000000 x8 : ffff8000a2c27747 x7 : 1ffff00014584eea x6 : 0000000041b58ab3 x5 : ffff700014584eea x4 : ffff8000a2c27750 x3 : 1fffe00003de6800 x2 : 0000000000000000 x1 : 0000000000000007 x0 : 0000000000000000 Call trace: add_mtd_device+0x56c/0x14cc drivers/mtd/mtdcore.c:719 (P) mtd_add_partition+0x218/0x48c drivers/mtd/mtdpart.c:280 mtdchar_blkpg_ioctl+0x17c/0x1b8 drivers/mtd/mtdchar.c:562 mtdchar_ioctl+0x2f8/0x1ed8 drivers/mtd/mtdchar.c:1218 mtdchar_unlocked_ioctl+0xa0/0xfc drivers/mtd/mtdchar.c:1241 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x124/0x1a4 fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x74/0x240 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:121 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:140 el0_svc+0x58/0x2a4 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] 0x0 hardirqs last disabled at (0): [] copy_process+0x16a8/0x5700 kernel/fork.c:2232 softirqs last enabled at (0): [] copy_process+0x16c8/0x5700 kernel/fork.c:2233 softirqs last disabled at (0): [<0000000000000000>] 0x0 ---[ end trace 0000000000000000 ]--- --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.